CN115479869A - Test device and method for evaluating grouting performance effect under running water condition under simulation of multiple working conditions - Google Patents
Test device and method for evaluating grouting performance effect under running water condition under simulation of multiple working conditions Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 428
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- 238000004537 pulping Methods 0.000 claims description 5
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- 239000006185 dispersion Substances 0.000 claims description 3
- 238000007569 slipcasting Methods 0.000 description 10
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- 239000011440 grout Substances 0.000 description 2
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Abstract
The invention discloses a device and a method for evaluating and testing simulation multi-working-condition grouting performance effect under a flowing water condition.
Description
Technical Field
The invention belongs to the technical field of grouting material performance test and effect evaluation equipment, and relates to a multi-working-condition grouting performance test and effect evaluation test device and a test method thereof under a flowing water condition.
Background
In the underground engineering of mines, water conservancy, traffic and the like in China, a large number of gravel layers, broken rock bodies, strong water flowing cracks, fault broken zones, rock cracks, karst caves, roadways and other flowing water grouting engineering are frequently encountered, in the high-pressure large-flow flowing water engineering treatment, the traditional grouting material is difficult to meet the engineering requirements, and the development and application requirements of the novel flowing water grouting plugging material are brought forward. The traditional cement grout is easy to dilute and disperse under the condition of flowing water, so that the plugging effect on gushing water is lost, and the development of the grouting material with high retention rate, environment friendliness and good economical efficiency under the flowing water environment becomes a difficult point and a hotspot in the industry aiming at the pore, crack or cavity type flowing water condition. All will use the slip casting test device of simulation flowing water condition when novel slip casting material or simulation operating condition carried out the slip casting effect evaluation under the development flowing water condition, and current utility model patent "porous slip casting simulation test device in crack under the flowing water condition" (CN 211784975U) is mainly to crack slip casting operating mode, the porous slip casting process of simulation, obtains the thick liquid diffusion law. The invention discloses a high-pressure grouting device and a test method under the condition of simulating the flowing water of a deep-buried stratum (CN 108196034), which mainly simulate a high-pressure flowing water environment and a high-pressure grouting process under the condition of simulating the flowing water of the deep-buried stratum, and obtain a slurry diffusion rule. The invention discloses a test device and a test method for a high polymer fracture grouting model under a pressure-bearing flowing water condition (CN 109342274A), and the high polymer fracture grouting diffusion characteristic under the pressure-bearing flowing water condition is tested by a visual fracture test bed. The utility model discloses a slip casting reinforcement test device under pressure-bearing flowing water condition "(CN 201724888U) adopts withstand voltage closed vessel and controllable water pressure interface simulation high pressure-bearing, move the slip casting environment under the water condition. The utility model discloses a "slip casting shutoff effect evaluation device under flowing water condition" (CN 210690337U) is through flowing water system, slip casting system, simulation crack equipment, waste liquid collecting vessel, data acquisition and processing system and image acquisition system observation different velocity of flow and the diffusion process and the law behind the flowing water grout injection crack. The invention discloses a test method for simulating the diffusion radius of gravel stratum grouting in a flowing water environment (CN 109211736A), which is characterized in that a gravel sample on site is collected and filled into a stainless steel box body, a grouting pipe and a water injection pipe are adopted to inject slurry and water into the box body, and the diffusion characteristic of the grouting slurry in the gravel sample is observed. The existing test device has the problems that the simulation working condition is single, various working conditions cannot be simulated, the crack height cannot be adjusted, the angle of a crack or a channel is not adjustable, the grouting process monitoring effect is poor, the grouting retention effect cannot be evaluated, the waste liquid yield is large, the waste liquid cannot be effectively utilized and the like.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a multi-working-condition grouting performance test effect evaluation test device and method under a flowing water condition, and solve the problems that the simulation working condition is single, the simulation working condition is few, the height and the angle of a crack or a channel can not be adjusted, the grouting process monitoring effect is poor, the grouting retention effect can not be evaluated, the waste liquid generation amount is large, and the waste liquid can not be effectively utilized in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme to realize:
a multi-working-condition grouting performance test effect evaluation test device under a flowing water condition comprises a water injection water tank, a water injection pipeline, a water injection pump, a control valve, a pressure stabilizing water tank, a pressure stabilizing filter screen, a test tank, a support system, a waste liquid collecting and filtering system, a camera system, a slurry making barrel, a slurry injection pump, a pump control valve and a slurry injection pipe;
the water injection water tank is communicated to the pressure stabilizing water tank through a water injection pipeline, and the water injection pump and the control valve are arranged on the water injection pipeline;
the side part of the bottom of the pressure stabilizing water tank is communicated with the test tank, the pressure stabilizing filter screen (6) is arranged at the bottom in the pressure stabilizing water tank, and water in the pressure stabilizing water tank conveys stable and uniform water flow into the test tank through the pressure stabilizing filter screen to form a dynamic water environment with set water pressure and flow rate;
the test tank comprises a bottom plate, a side plate, a tail plate, a liftable upper cover plate, a test seam, a water outlet, a grouting port, a sealing rubber strip, a compression spring, a flow speed and water pressure sensor and a pressure plate assembly; the bottom plate, the two side plates, the tail plate and the lower side wall of the pressure stabilizing water tank are enclosed to form a test tank body with an opening at the top, the bottom of the pressure stabilizing water tank is fixed on the bottom plate, and the pressure stabilizing water tank is opposite to the tail plate; the liftable upper cover plate sealing cover is arranged in the opening at the top of the test groove body, and the space between the liftable upper cover plate and the bottom plate is the test seam; the liftable upper cover plate is provided with the grouting opening; the water outlet is arranged at the joint of the tail plate and the bottom plate; the sealing rubber strips are arranged in the test seam and tightly attached to the bottom plate and the liftable upper cover plate, the two sealing rubber strips are parallel to each other and are arranged along the water flow direction, and the distance between the two sealing rubber strips can be adjusted to adjust the width of the test seam; the compression spring is arranged in the sealing rubber strip to control the lifting of the lifting upper cover plate so as to adjust the height of the test seam; the pressure plate assembly is arranged on the liftable upper cover plate to position the liftable upper cover plate; the flow rate and water pressure sensor is arranged on the bottom plate to record the flow range, the water head pressure, the flow rate and the slurry retention quality of the slurry in the test seam in real time;
the waste liquid collecting and filtering system is arranged below the water outlet and is communicated with the water injection water tank;
the supporting system is arranged below the test tank to support and adjust the inclination and the dip angle of the test tank;
the camera system is arranged above the test groove and can change along with the angle of the test groove so as to monitor the diffusion characteristic in the test seam in real time;
the slurry making barrel is communicated to a slurry injecting port of the test groove through a slurry injecting pipe so as to enable slurry to diffuse in a flowing water environment simulated by the test seam; the grouting pump and the pump control valve are arranged on the grouting pipe.
The invention also comprises the following technical characteristics:
specifically, the pressure plate assembly comprises a longitudinal pressure strip, a transverse pressure strip and a bolt which are arranged on the liftable upper cover plate; the longitudinal pressing strips are arranged on the liftable upper cover plate, are distributed along the water flow direction in the test seam and are parallel to each other; the plurality of transverse pressing strips are positioned on the longitudinal pressing strips and are vertical to the longitudinal pressing strips; the bolt is connected with the transverse pressing bar, the liftable upper cover plate and the bottom plate; the adjusting bolt enables pressure to be transmitted layer by layer along the transverse pressing strip, the longitudinal pressing strip and the liftable upper cover plate and then presses the compression spring inside the sealing rubber strip to contract, so that the liftable upper cover plate is descended, and the height of the test seam is adjusted.
Specifically, the supporting system comprises two transverse rib columns arranged below the bottom plate, two longitudinal rib columns perpendicular to the transverse rib columns, four spherical supports, four hydraulic supports, four bases, a hydraulic oil pump, four hydraulic oil pipes and an oil pressure gauge; the spherical support is hinged to the vertical crossing part of the transverse rib column and the longitudinal rib column and is arranged at the upper end of the hydraulic prop, the base is arranged at the bottom of the hydraulic prop, and the base provides stable supporting force for a supporting system; the hydraulic oil pump respectively conveys hydraulic oil to the 4 hydraulic supports through hydraulic oil pipes, and each hydraulic support is driven to lift according to the requirement of a set angle.
Specifically, the waste liquid collecting and filtering system comprises a waste liquid collecting bin, a waste liquid filtering grid, a clear water bin, a water return pipe, a water return pump and a water return flowmeter; the waste liquid collecting bin and the clear water bin are separated through a waste liquid filtering grid, the waste liquid collecting bin is located below the water outlet, the clear water bin is communicated to the water injection water tank through a water return pipe, and a water return pump and a water return flowmeter are arranged on the water return pipe.
Specifically, the camera system comprises a camera, a transverse bracket and a vertical bracket; the lower end of the vertical bracket is arranged on a side plate of the test tank, the transverse bracket is connected with the upper end of the vertical bracket and the top of the pressure stabilizing water tank, and the transverse bracket and the vertical bracket form a stable truss; the camera is arranged on the transverse bracket and is positioned above the middle of the test tank; the camera system can change according to the angle change of the test groove, is always parallel to the test seam, and monitors the diffusion characteristic of the slurry in the test seam in real time.
Specifically, the grouting pump comprises a pump pressure meter and a pump flow meter; and recording the pressure of the slurry output by the grouting pump through a pump pressure meter, and counting the flow of the slurry in each test process through a pump flow meter.
A multi-working-condition grouting performance test effect evaluation test method under flowing water conditions is realized by the multi-working-condition grouting performance test effect evaluation test device under the flowing water conditions, and comprises the following steps:
step one, measuring hydrogeological conditions and stratum parameters in fractures on an engineering site: hydrodynamic pressure of P Fruit of Chinese wolfberry A flow rate of v Fruit of Chinese wolfberry And formation porosity of n Fruit of Chinese wolfberry The gap opening is H Fruit of Chinese wolfberry The angle of the crack is alpha Fruit of Chinese wolfberry Or a channel height of H Fruit of Chinese wolfberry Width of L Fruit of Chinese wolfberry Channel angle of inclination alpha Fruit of Chinese wolfberry ；
Step two, according to the hydrogeological condition and the stratum parameters in the step one, the porosity of the test seam is carved in the test groove, and the porosity is n = n Fruit of Chinese wolfberry The crack opening is H = H Fruit of Chinese wolfberry Or channel height H = H Fruit of Chinese wolfberry Width L = L Fruit of Chinese wolfberry Simulating real pore, fracture or large-channel stratum working conditions;
step three, filling a pore material in the test seam of the test groove to simulate the porosity of n = n Fruit of Chinese wolfberry The height of a compression spring in the sealing rubber strip is increased or reduced by adjusting the length of the bolt, so that the height between the liftable upper cover plate and the bottom plate is H = H Fruit of Chinese wolfberry ；
Or setting the crack height H = H in the test seam of the test groove Fruit of Chinese wolfberry The height of a compression spring in the sealing rubber strip is increased or reduced by adjusting the length of the bolt, so that the height of a crack constructed between the liftable upper cover plate and the bottom plate is H = H Fruit of Chinese wolfberry Consistent with the true formation;
or setting the space height in the test slot of the test groove as H = H Fruit of Chinese wolfberry The height of a compression spring in the sealing rubber strip is increased or reduced by adjusting the length of the bolt, so that the height of a space constructed between the liftable upper cover plate and the bottom plate is H = H Fruit of Chinese wolfberry Adjusting the space width to be L = L by adjusting the distance between the sealing rubber strip and the two side plates Fruit of Chinese wolfberry Consistent with the real working condition;
step four, filling water into the water filling water tank, and filling the water filling water tank through a water filling pumpPumping the reclaimed water into a pressure stabilizing water tank through a water injection pipeline, wherein the pumping pressure of a water injection pump is P Pump The height of the pressure stabilizing water tank is H Stable According to the formula (1), the water pressure in the test seam is adjusted to the parameter P required by design Is provided with The water in the pressure stabilizing water tank is conveyed to a test seam of the test tank through the pressure stabilizing filter screen to form stable water pressure P Is provided with ＝P Fruit of Chinese wolfberry A flow rate of v Is provided with ＝ν Fruit of Chinese wolfberry The stable running water environment is realized;
P is provided with ＝P Pump +ρ Water (I) gH Stable (1)
In the formula:
P is provided with -the head pressure required to be reached by the test slot,
P pump and method of operating the same -the head pressure of the output of the filling pump,
ρ water (I) -the density of the water (W) and,
g-the degree of gravity,
H stable -height of the ballast tank;
step five, a hydraulic oil pump of the supporting system respectively conveys hydraulic oil to 4 hydraulic struts through hydraulic oil pipes, and the inclination angle alpha of the actual stratum fracture or channel is determined Fruit of Chinese wolfberry Setting the angle of the test seam, and driving each hydraulic support to lift by a hydraulic oil pump; the lifting lengths of the 4 hydraulic props are respectively L Left 1 、L Left 2 、L Right 1 、L Right 2 The inclination angle alpha = alpha of stratum fracture or large channel is adjusted according to actual working conditions by hydraulically controlling the hydraulic prop in 4 directions Fruit of Chinese wolfberry The test groove tends to be stable under different inclination angles through the spherical support;
in the formula:
alpha-the simulated fracture dip of the test cell,
L left 1 、L Left 2 、L Right 1 、L Right 2 The raised lengths of the 4 hydraulic props each,
S max、min -the length of the test cell between the highest and lowest points of the hydraulic prop;
preparing a developing flowing water anti-dispersion grouting material or a grouting material to be used in an engineering field in a grouting barrel, pumping the grouting prepared in the grouting barrel to a grouting opening of a test groove through a grouting pipe by a grouting pump, and injecting the grouting into a flowing water environment simulated by a test seam of the test groove through the grouting opening; recording the slurry pressure P output by the grouting pump through a pump pressure gauge Pulp and its production process A pump flow meter counts the flow Q of the slurry in each test process;
step seven, monitoring the flow velocity v, the water head pressure P, the longitudinal diffusion distance X, the transverse diffusion distance Y and the slurry retention area S of the test seam through the flow velocity with the transverse interval Sy and the longitudinal interval Sx on the bottom plate of the test tank and the water pressure sensor; calculating to obtain the retention volume V of the slurry according to a formula (3), calculating the retention mass M according to a formula (4), and calculating the longitudinal diffusion radius R of the slurry in the flowing water environment according to a formula (5) Longitudinal direction Calculating the lateral diffusion radius R of the slurry in the flowing water environment according to the formula (6) Longitudinal direction Analyzing the diffusion rule and grouting plugging effect of a grouting material under the condition of flowing water on line;
V＝∫nS x S y (P pump +P Stable -P)/ρ Water (W) g (3)
M＝ρ Pulp and its production process V＝ρ Pulp and its production process ∫nS x S y (P Pump +P Stable -P)/ρ Water (W) g (4)
R Longitudinal direction ＝X (5)
R Horizontal bar ＝Y/2 (6)
In the formula:
v is the volume retained after the slurry is washed,
m is the mass retained after the slurry is washed,
S x -the longitudinal spacing of the flow rate from the water pressure sensor,
S y -the lateral spacing of the flow rate from the water pressure sensor,
n-the number of squares occupied both transversely and longitudinally,
P pump and method of operating the same -the head pressure of the water output by the water injection pump,
P stable -stabilizing the water head pressure of the water tank,
p-ith flow rate and head pressure monitored by the water pressure sensor,
ρ water (W) -the density of the water (W) and,
ρ pulp and its production process -the density of the slurry, and,
g-the degree of gravity,
H stable -the height of the pressure-stabilised water bath,
R cross bar -the lateral diffusion radius of the slurry,
R longitudinal direction -the longitudinal diffusion radius of the slurry,
x is the distance of longitudinal diffusion of the slurry in the test cell,
y is the distance of lateral diffusion of the slurry in the test cell;
monitoring the diffusion characteristics of the slurry in the test seam in real time through a camera system, and recording the diffusion form and the flow direction of the slurry in a flowing water environment;
step nine, passing the mass M of the grouting liquid Note that And the ratio of the mass M of the slurry retained in the test tank to the mass M of the slurry retained in the test tank, the slurry retention rate beta can be obtained according to the formula (7):
m is the mass retained after the slurry is washed,
M note that -the mass of the slurry injected into the test cell,
q-statistical slurry flow into the test cell,
ρ pulp and its production process -the density of the slurry;
step ten, muddy water mixed with the slurry and passing through the test tank flows into the waste liquid collecting bin through the water outlet, the muddy water mixed with the slurry in the waste liquid collecting bin flows through the waste liquid filtering grid under the action of osmotic pressure, the muddy water is purified in the process of flowing in the waste liquid filtering grid, clear water enters the clear water bin, the muddy water is left in the waste liquid collecting bin, the clear water filtered in the clear water bin is reinjected into the water injection water tank through the water return pipe by the water return pump, the amount of reclaimed water is counted by the water return flowmeter, and purification and reutilization of the waste water are achieved.
Compared with the prior art, the invention has the following technical effects:
according to the grouting material performance testing and grouting effect evaluation device, the performance testing and grouting effect evaluation of the grouting material under the working conditions of flowing water such as pores, cracks and large channels are realized through the water injection pump, the grouting pump, the pressure stabilizing water tank, the test tank, the supporting system, the waste liquid collecting and filtering system and the camera system, and the problems that the simulation working conditions are single, the simulation working conditions are few, and the grouting retention effect cannot be evaluated in the prior art are solved.
The invention (II) adds the pressure stabilizing water tank and the pressure stabilizing filter screen at the front end of the test tank, realizes the stability and quantitative adjustment of the water pressure under the working conditions of flowing water such as pores, cracks, large channels and the like, provides accurate and stable flowing water pressure and flow according to the experimental requirements, and ensures the vividness and stability of the test working conditions.
According to the invention, the supporting system is arranged at the lower part of the test tank, the hydraulic struts in 4 directions are hydraulically controlled, the stratum fractures and the large channels with different inclination angles and tendencies are arranged according to the actual working conditions, and the spherical support realizes the stability of the test tank under the condition of large inclination angle.
(IV) the test tank of the invention realizes the automatic adjustment of the opening of the test seam through the liftable upper cover plate, the compression spring and the connecting bolt, can simulate various practical engineering conditions such as micro-cracks, medium cracks, large cracks and the like, reverses the grouting engineering field, improves the reliability of test data, and solves the problem that the height and the angle of the crack or the channel are not adjustable.
(V) the test tank realizes real-time measurement of flow velocity, water head pressure, slurry retention volume and retention quality under the condition of flowing water through the liftable upper cover plate, the test seam and the flow velocity and water pressure sensor, analyzes the diffusion rule and the grouting plugging effect of a grouting material under the condition of flowing water on line, and solves the problems that the grouting process under the condition of flowing water in the prior art is poor in monitoring effect and the grouting retention state cannot be evaluated.
According to the waste liquid collecting and filtering system, muddy water obtained by mixing the slurry in the waste liquid collecting bin with water is purified by the waste liquid filtering grille and then enters the clear water bin, and the filtered clear water is injected back into the water injection water tank, so that the purification and reutilization of waste water are realized, and the problems that the waste liquid is large in production amount and cannot be effectively utilized are solved.
Drawings
FIG. 1 is a schematic view of the overall structure of the apparatus of the present invention;
FIG. 2 is a schematic view of the structure of a test cell of the present invention;
FIG. 3 is a right side view of a test cell of the present invention;
FIG. 4 is a top view of the pressure stabilizing water tank and test chamber of the present invention with the liftable upper cover plate and pressure plate assembly removed;
FIG. 5 is a longitudinal sectional view of a test cell of the present invention;
FIG. 6 is a transverse cross-sectional view of a test cell of the present invention;
figure 7 is a cross-sectional view of a waste collection and filtration system.
The meaning of the individual reference symbols in the figures is: 1. a water injection water tank, 2 parts of a water injection pipeline, 3 parts of a water injection pump, 3-1 parts of a pressure gauge, 3-2 parts of a flow meter, 4 parts of a control valve, 5 parts of a pressure-stabilizing water tank, 6 parts of a pressure-stabilizing filter screen, 7 parts of a test tank, 7-1 parts of a bottom plate, 7-2 parts of a side plate, 7-3 parts of a tail plate, 7-4 parts of a liftable upper cover plate, 7-5 parts of a test seam, 7-6 parts of a water outlet, 7-7 parts of a water outlet, a grouting port, 7-8 parts of a sealing rubber strip, 7-9 parts of a bolt, 7-10 parts of a flow velocity and water pressure sensor, 7-11 parts of a longitudinal pressing strip, 7-12 parts of a transverse pressing strip, 7-13 parts of a compression spring, 8 parts of a support system, 8-1 parts of a transverse rib column, 8-2 parts of a longitudinal rib column, 8-3 parts of a spherical support, 8-4 parts of a hydraulic support, 8-5 parts of a base, 8-6 parts of a hydraulic oil pump, 8-7 parts of a hydraulic oil pipe, 8-8 parts of an oil pressure gauge, 9 parts of a waste liquid collecting and filtering system, 9-1 parts of a waste liquid collecting bin, 9-2 parts of a waste liquid filtering grid, 9-3 parts of a clear water bin, 9-4 parts of a water return pipe, 9-5 parts of a water return pump, 9-6 parts of a water return flowmeter, 10 parts of a camera system, 10-1 parts of a camera, 10-2 parts of a transverse support, 10-3 parts of a vertical support, 11 parts of a pulping barrel, 12 parts of a grouting pump, 12-1 parts of a pump pressure gauge, 12-2 parts of a pump flow gauge, 13 parts of a pump control valve, 14 parts of a grouting pipe.
Detailed Description
The following embodiments of the present invention are provided, and it should be noted that the present invention is not limited to the following embodiments, and all equivalent changes based on the technical solutions of the present invention are within the protection scope of the present invention.
Example 1:
the embodiment provides a multi-working-condition grouting performance test effect evaluation test device under a flowing water condition, which comprises a water injection water tank 1, a water injection pipeline 2, a water injection pump 3, a control valve 4, a pressure stabilizing water tank 5, a pressure stabilizing filter screen 6, a test tank 7, a supporting system 8, a waste liquid collecting and filtering system 9, a camera system 10, a pulping barrel 11, a grouting pump 12, a pump control valve 13 and a grouting pipe 14;
the water injection water tank 1 is communicated to the pressure stabilizing water tank 5 through the water injection pipeline 2, the water injection pump 3 and the control valve 4 are arranged on the water injection pipeline 2, the water injection pump 3 can pump the water in the water injection water tank 1 to the pressure stabilizing water tank 5 through the water injection pipeline 2, and the water injection pump 3 and the pressure stabilizing water tank 5 can adjust the water pressure to design parameters; in the embodiment, a pressure gauge 3-1 and a flow gauge 3-2 are arranged in the water injection pump 3;
the bottom side part of the pressure stabilizing water tank 5 is communicated with a test tank 7, a pressure stabilizing filter screen 6 is arranged at the bottom in the pressure stabilizing water tank 5, and water in the pressure stabilizing water tank 5 is used for conveying stable and uniform water flow into the test tank 7 through the pressure stabilizing filter screen 6 so as to form a flowing water environment with set water pressure and flow rate;
the test tank 7 comprises a bottom plate 7-1, side plates 7-2, a tail plate 7-3, a liftable upper cover plate 7-4, a test seam 7-5, a water outlet 7-6, a grouting opening 7-7, a sealing rubber strip 7-8, a compression spring 7-13, a flow rate and water pressure sensor 7-10 and a pressing plate assembly; the bottom plate 7-1, the two side plates 7-2, the tail plate 7-3 and the lower side wall of the pressure stabilizing water tank 5 enclose a test tank body with an open top, the bottom of the pressure stabilizing water tank 5 is fixed on the bottom plate 7-1, and the pressure stabilizing water tank 5 is opposite to the tail plate 7-3; the liftable upper cover plate 7-4 is sealed in the opening at the top of the test groove body, and the space between the liftable upper cover plate 7-4 and the bottom plate 7-1 is a test seam 7-5; a grouting opening 7-7 is arranged on the liftable upper cover plate 7-4; a water outlet 7-6 is arranged at the joint of the tail plate 7-3 and the bottom plate 7-1; the sealing rubber strips 7-8 are arranged in the test seam 7-5 and are tightly attached to the bottom plate 7-1 and the liftable upper cover plate 7-4, the two sealing rubber strips 7-8 are parallel to each other and are arranged along the water flow direction, and the distance between the two sealing rubber strips 7-8 is adjustable so as to adjust the width of the test seam 7-5; the compression spring 7-13 is arranged in the sealing rubber strip 7-8 to control the lifting of the liftable upper cover plate 7-4 so as to adjust the height of the test seam 7-5; the pressure plate assembly is arranged on the liftable upper cover plate 7-4 to position the liftable upper cover plate; the flow velocity and water pressure sensor 7-10 is arranged on the bottom plate 7-1 to record the flowing range, the water head pressure, the flow velocity and the remaining quality of the slurry in the test seam 7-5 in real time, and evaluate the diffusion rule and the grouting effect of the slurry under the condition of flowing water according to monitoring data;
the waste liquid collecting and filtering system 9 is arranged below the water outlets 7-6 and communicated with the water injection water tank 1;
a support system 8 is installed below the test bath 7-1 to support and adjust the inclination and inclination of the test bath 7-5;
the camera system 10 is arranged above the test groove 7 and can change along with the angle of the test groove 7 so as to monitor the diffusion characteristic in the test seam 7-5 in real time;
the pulping barrel 11 is communicated to a grouting port 7-7 of the test groove 7 through a grouting pipe 14 so as to enable the pulp to diffuse in a flowing water environment simulated by the test slot 7-5; the grouting pump 12 and the pump control valve 13 are provided on the grouting pipe 14.
The pressing plate assembly comprises a longitudinal pressing strip 7-11, a transverse pressing strip 7-12 and a bolt 7-9 which are arranged on the liftable upper cover plate 7-4; the longitudinal pressing strips 7-11 are arranged on the liftable upper cover plate 7-4, the longitudinal pressing strips 7-11 are distributed along the water flow direction in the test seam 7-5, and the longitudinal pressing strips 7-11 are multiple and parallel to each other; a plurality of transverse pressing strips 7-12 are arranged on the longitudinal pressing strips 7-11 and are vertical to the longitudinal pressing strips 7-11; the bolt 7-9 is connected with the transverse pressing bar 7-12, the liftable upper cover plate 7-4 and the bottom plate 7-1; the adjusting bolts 7-9 enable pressure to be transmitted layer by layer along the transverse pressing strips 7-12, the longitudinal pressing strips 7-11 and the liftable upper cover plate 7-4 and then press the compression springs 7-13 in the sealing rubber strips 7-8 to contract, so that the liftable upper cover plate 7-4 is lowered, and the height H of the test seam 7-5 is adjusted.
By additionally arranging the pressure stabilizing water tank 5 and the pressure stabilizing filter screen 6 at the front end of the test tank 7, the water pressure P under the working conditions of dynamic water such as pores, cracks and large channels can be realized Is provided with Is stable and quantitatively adjustable, and provides accurate and stable running water pressure and flow according to the experimental requirementsAn amount; water head pressure P required to be reached by test seam under running water working condition Is provided with ：
P Is provided with ＝P Pump +ρ Water (W) gH Stable (1)
In the formula:
P is provided with -the head pressure required to be reached by the test slot,
P pump -the head pressure of the output of the filling pump,
ρ water (W) -the density of the water (W) and,
g-the degree of gravity,
H stable -the height of the ballast tank.
The supporting system 8 comprises two transverse rib columns 8-1 arranged below a bottom plate 7-1, two longitudinal rib columns 8-2 perpendicular to the transverse rib columns 8-1, four spherical supports 8-3, four hydraulic supports 8-4, four bases 8-5, a hydraulic oil pump 8-6, four hydraulic oil pipes 8-7 and an oil pressure gauge 8-8;2 transverse rib columns 8-1 are respectively arranged at the front end and the rear end of the lower part of a bottom plate 7-1 of the test tank 7, and 2 longitudinal rib columns 8-2 are respectively arranged at two sides of the lower part of the bottom plate 7-1 of the test tank 7; the vertical crossing part of the transverse rib column 8-1 and the longitudinal rib column 8-2 is hinged with a spherical support 8-3, the spherical support 8-3 is arranged at the upper end of a hydraulic support 8-4, the bottom of the hydraulic support 8-4 is provided with a base 8-5, and the base 8-5 provides stable supporting force for a supporting system 8; the hydraulic oil pump 8-6 respectively conveys hydraulic oil to the 4 hydraulic supports 8-4 through a hydraulic oil pipe 8-7, and each hydraulic support 8-4 is driven to lift according to the requirement of a set angle; the rising lengths of the 4 hydraulic props 8-4 are respectively L Left 1 、L Left 2 、L Right 1 、L Right 2 The hydraulic props 8-4 in 4 directions are hydraulically controlled, different dip angles and tendencies of stratum fractures and large channels are adjusted according to actual working conditions, and meanwhile the spherical supports 8-3 ensure the stability of the test groove 7 under different dip angles;
the rising lengths of the 4 hydraulic props 8-4 are respectively L Left 1 、L Left 2 、L Right 1 、L Right 2 Then, there are:
in the formula:
alpha-the simulated fracture dip of the test cell,
L left 1 、L Left 2 、L Right 1 、L Right 2 The raised lengths of the 4 hydraulic props each,
S max、min the length of the test cell between the highest and lowest points of the hydraulic prop.
The flow velocity and water pressure sensor 7-10 comprises a flow velocity sensing unit, a water pressure sensing unit and a weight sensing unit, the flow velocity and water pressure sensor is transversely arranged on the bottom plate 7-1 according to Sy intervals and longitudinally arranged on Sx intervals, the slurry retention volume V and the retention mass M are calculated through the height of the test seam 7-5 and the monitored water flow velocity V, the monitored water head pressure P, the monitored longitudinal diffusion distance X, the monitored transverse diffusion distance Y and the monitored slurry retention area S, and the slurry material diffusion rule and the grouting plugging effect are analyzed on line.
V＝∫nS x S y (P Pump and method of operating the same +P Stable -P)/ρ Water (W) g (3)
M＝ρ Pulp and its production process V＝ρ Pulp and its production process ∫nS x S y (P Pump and method of operating the same +P Stable -P)/ρ Water (W) g (4)
R Longitudinal direction ＝X (5)
R Horizontal bar ＝Y/2 (6)
In the formula:
v is the volume retained after the slurry is washed,
m is the mass retained after the slurry is washed,
S x -the longitudinal spacing of the flow rate from the water pressure sensor,
S y -the lateral spacing of the flow rate from the water pressure sensor,
n-the number of squares occupied both transversely and longitudinally,
P pump and method of operating the same -the head pressure of the output of the filling pump,
P stable -stabilizing the water head pressure of the water tank,
p-ith flow rate and head pressure monitored by the water pressure sensor,
ρ water (W) -the density of the water,
ρ pulp and its production process -the density of the slurry, and,
g-the degree of gravity,
H stable -the height of the pressure-stabilised water tank,
R horizontal bar -the radius of lateral diffusion of the slurry,
R longitudinal direction -the longitudinal diffusion radius of the slurry,
x is the distance of longitudinal diffusion of the slurry in the test cell,
y is the distance of lateral diffusion of the slurry in the test cell.
The waste liquid collecting and filtering system 9 comprises a waste liquid collecting bin 9-1, a waste liquid filtering grid 9-2, a clear water bin 9-3, a water return pipe 9-4, a water return pump 9-5 and a water return flowmeter 9-6; the waste liquid collecting bin 9-1 and the clear water bin 9-3 are separated by a waste liquid filtering grid 9-2, wherein the waste liquid collecting bin 9-1 is positioned below the water outlet 7-6, the clear water bin 9-3 is communicated to the water injection water tank 1 through a water return pipe 9-4, and a water return pump 9-5 and a water return flowmeter 9-6 are arranged on the water return pipe 9-4; the muddy water mixed with the water in the test tank 7 flows into the waste liquid collecting bin 9-1 through the water outlet 7-6, the muddy water mixed with the water in the waste liquid collecting bin 9-1 flows through the waste liquid filtering grid 9-2 under the action of osmotic pressure, the muddy water is purified in the process of flowing in the waste liquid filtering grid 9-2, the clear water enters the clear water bin 9-3, the muddy water is left in the waste liquid collecting bin 9-1, the clear water filtered in the clear water bin 9-3 is re-injected into the water injection water tank 1 through the water return pump 9-5 through the water return pipe 9-4, the quantity of the re-used water is counted by the water return flowmeter 9-6, the purification and the re-use of the waste water are realized, and the problems that the waste liquid is large in production quantity and cannot be effectively used are solved.
The camera system 10 comprises a camera 10-1, 5 transverse supports 10-2 and 4 vertical supports 10-3; the lower end of a vertical support 10-3 is arranged on a side plate 7-2 of the test tank 7, a transverse support 10-2 is connected with the upper end of the vertical support 10-3 and the top of the pressure stabilizing water tank 5, and the transverse support 10-2 and the vertical support 10-3 form a stable truss; the camera 10-1 is arranged on the transverse bracket 10-2 and is positioned above the middle of the test tank 7; the camera system 10 can change according to the angle change of the test groove 7 and is always parallel to the test seam 7-5, and the diffusion characteristic of the slurry in the test seam 7-5 is monitored in real time;
the grouting pump 12 comprises a pump pressure gauge 12-1 and a pump flow gauge 12-2; recording the slurry pressure P output by the grouting pump through a pump pressure gauge 12-1 Pulp and its production process The pump flow meter 12-2 counts the flow Q of the slurry in each test process;
mass M through the slip Note that And the ratio of the mass M of the slurry retained in the test tank to the mass M of the slurry retained in the test tank can obtain the slurry retention rate:
m is the mass retained after the slurry is washed,
M note that -the mass of slurry injected into the test cell,
q-statistical slurry flow rate into the test cell,
ρ pulp and its production process -density of the slurry.
Example 2:
the embodiment provides a multi-working-condition grouting performance test effect evaluation test method under a flowing water condition, which comprises the following steps of:
step one, measuring hydrogeological conditions and stratum parameters in fractures on an engineering site: hydrodynamic pressure of P Fruit of Chinese wolfberry A flow rate of v Fruit of Chinese wolfberry And formation porosity of n Fruit of Chinese wolfberry The gap opening is H Fruit of Chinese wolfberry A crack angle of alpha Fruit of Chinese wolfberry Or a channel height of H Fruit of Chinese wolfberry A width of L Fruit of Chinese wolfberry Channel inclination angle of alpha Fruit of Chinese wolfberry ；
Step two, generalizing the moving water condition grouting test model according to the hydrogeological condition and the stratum parameters in the step one, and engraving a test slot with the porosity of n = n Fruit of Chinese wolfberry The crack opening is H = H Fruit of Chinese wolfberry Or the channel height H = H Fruit of Chinese wolfberry Width L = L Fruit of Chinese wolfberry Simulating real pore, fracture or large channel stratum conditions;
step three, filling a pore material in a test slot of the test groove to simulate poresThe ratio is n = n Fruit of Chinese wolfberry The height of a compression spring in the sealing rubber strip is increased or reduced by adjusting the length of the bolt, so that the height between the liftable upper cover plate and the bottom plate is H = H Fruit of Chinese wolfberry ；
Or setting the crack height H = H in the test seam of the test groove Fruit of Chinese wolfberry The height of a compression spring in the sealing rubber strip is increased or reduced by adjusting the length of the bolt, so that the height of a crack constructed between the liftable upper cover plate and the bottom plate is H = H Fruit of Chinese wolfberry Consistent with the true formation;
or setting the space height in the test slot of the test groove as H = H Fruit of Chinese wolfberry The height of a compression spring in the sealing rubber strip is increased or reduced by adjusting the length of the bolt, so that the height of a space constructed between the liftable upper cover plate and the bottom plate is H = H Fruit of Chinese wolfberry Adjusting the space width to be L = L by adjusting the distance between the sealing rubber strip and the two side plates Fruit of Chinese wolfberry Consistent with the real working condition;
step four, injecting drinking water into the water injection water tank, pumping the water in the water injection water tank into a pressure stabilizing water tank through a water injection pipeline by a water injection pump, wherein the pressure of the water injection pump is P Pump and method of operating the same The height of the pressure stabilizing water tank is H Stable According to the formula (1), the water pressure in the test seam is adjusted to the parameter P required by design Is provided with The water in the pressure stabilizing water tank is conveyed to a test seam of the test tank through the pressure stabilizing filter screen to form stable water pressure P Is provided with ＝P Fruit of Chinese wolfberry V is the flow velocity Is provided with ＝ν Fruit of Chinese wolfberry The stable flowing water environment;
P is provided with ＝P Pump and method of operating the same +ρ Water (W) gH Stable (1)
In the formula:
P is provided with The head pressure required to be reached by the test slot,
P pump and method of operating the same -the head pressure of the water output by the water injection pump,
ρ water (W) -the density of the water,
g-the degree of gravity,
H stable -height of the ballast tank;
step five, a hydraulic oil pump of the supporting system respectively conveys hydraulic oil to 4 hydraulic struts through hydraulic oil pipes, and the inclination angle alpha of the actual stratum fracture or channel is determined Fruit of Chinese wolfberry Setting the angle of the test seam, and driving each hydraulic prop to lift by a hydraulic oil pump; the lifting lengths of the 4 hydraulic props are respectively L Left 1 、L Left 2 、L Right 1 、L Right 2 The inclination angle alpha = alpha of stratum fracture or large channel is adjusted according to actual working conditions by hydraulically controlling the hydraulic prop in 4 directions Fruit of Chinese wolfberry The test groove tends to be stable under different inclination angles through the spherical support;
in the formula:
alpha-the simulated fracture dip angle of the test cell,
L left 1 、L Left 2 、L Right 1 、L Right 2 The raised lengths of the 4 hydraulic props each,
S max、min -the length of the test cell between the highest and lowest points of the hydraulic prop;
preparing a developing flowing water anti-dispersion grouting material or a grouting material to be used in an engineering field in a grouting barrel, pumping the grouting prepared in the grouting barrel to a grouting opening of a test groove through a grouting pipe by a grouting pump, and injecting the grouting into a flowing water environment simulated by a test seam of the test groove through the grouting opening; recording the slurry pressure P output by the grouting pump through a pump pressure gauge Pulp and its production process Counting the flow Q of the slurry in each test process by using a pump flow meter;
step seven, monitoring the flow velocity v, the water head pressure P, the longitudinal diffusion distance X, the transverse diffusion distance Y and the slurry retention area S in the test seam through the flow velocity with the transverse interval Sy and the longitudinal interval Sx on the bottom plate of the test tank and the water pressure sensor; calculating to obtain the retention volume V of the slurry according to a formula (3), calculating the retention mass M according to a formula (4), and calculating the longitudinal diffusion radius R of the slurry in the flowing water environment according to a formula (5) Longitudinal direction Root of Chinese scholar treeCalculating the lateral diffusion radius R of the slurry in the flowing water environment according to the formula (6) Longitudinal direction Analyzing the diffusion rule and grouting plugging effect of a grouting material under the condition of flowing water on line;
V＝∫nS x S y (P pump and method of operating the same +P Stable -P)/ρ Water (W) g (3)
M＝ρ Pulp and its production process V＝ρ Pulp and its production process ∫nS x S y (P Pump and method of operating the same +P Stable -P)/ρ Water (W) g (4)
R Longitudinal direction ＝X (5)
R Horizontal bar ＝Y/2 (6)
In the formula:
v is the volume retained after the slurry is washed,
m is the mass of the slurry left after scouring,
S x -the longitudinal spacing of the flow rate from the water pressure sensor,
S y -the lateral spacing of the flow rate from the water pressure sensor,
n-the number of squares occupied both transversely and longitudinally,
P pump -the head pressure of the water output by the water injection pump,
P stable -stabilizing the water head pressure of the water tank,
p-ith flow rate and head pressure monitored by the water pressure sensor,
ρ water (W) -the density of the water,
ρ pulp and its production process -the density of the slurry, and,
g-the degree of gravity,
H stable -the height of the pressure-stabilised water tank,
R horizontal bar -the lateral diffusion radius of the slurry,
R longitudinal direction -the longitudinal diffusion radius of the slurry,
x is the distance of longitudinal diffusion of the slurry in the test cell,
y is the distance of lateral diffusion of the slurry in the test cell;
monitoring the diffusion characteristics of the slurry in the test seam in real time through a camera system, and recording the diffusion form and the flow direction of the slurry in a flowing water environment;
step nine, passing the mass M of the grouting liquid Note that And the ratio of the mass M of the slurry retained in the test tank to the mass M of the slurry retained in the test tank, the slurry retention rate beta can be obtained according to the formula (7):
m is the mass of the slurry left after scouring,
M injection bottle -the mass of the slurry injected into the test cell,
q-statistical slurry flow into the test cell,
ρ pulp and its production process -the density of the slurry;
step ten, muddy water mixed with the slurry and passing through the test tank flows into the waste liquid collecting bin through the water outlet, the muddy water mixed with the slurry in the waste liquid collecting bin flows through the waste liquid filtering grid under the action of osmotic pressure, the muddy water is purified in the process of flowing in the waste liquid filtering grid, clear water enters the clear water bin, the muddy water is left in the waste liquid collecting bin, the clear water filtered in the clear water bin is reinjected into the water injection water tank through the water return pipe by the water return pump, the amount of reclaimed water is counted by the water return flowmeter, and purification and reutilization of the waste water are achieved.
Claims (7)
1. A multi-working-condition grouting performance test effect evaluation test device under a flowing water condition is characterized by comprising a water injection water tank (1), a water injection pipeline (2), a water injection pump (3), a control valve (4), a pressure stabilizing water tank (5), a pressure stabilizing filter screen (6), a test tank (7), a support system (8), a waste liquid collecting and filtering system (9), a camera system (10), a pulping barrel (11), a grouting pump (12), a pump control valve (13) and a grouting pipe (14);
the water injection water tank (1) is communicated to the pressure stabilizing water tank (5) through a water injection pipeline (2), and a water injection pump (3) and a control valve (4) are arranged on the water injection pipeline (2);
the bottom side part of the pressure stabilizing water tank (5) is communicated with the test tank (7), the pressure stabilizing filter screen (6) is arranged at the bottom in the pressure stabilizing water tank (5), and water in the pressure stabilizing water tank (5) is conveyed to the test tank (7) through the pressure stabilizing filter screen (6) to form a flowing water environment with set water pressure and flow rate;
the test tank (7) comprises a bottom plate (7-1), a side plate (7-2), a tail plate (7-3), a liftable upper cover plate (7-4), a test seam (7-5), a water outlet (7-6), a grouting opening (7-7), a sealing rubber strip (7-8), a compression spring (7-13), a flow rate and water pressure sensor (7-10) and a pressing plate assembly; the bottom plate (7-1), the two side plates (7-2), the tail plate (7-3) and the lower side wall of the pressure stabilizing water tank (5) enclose a test tank body with an opening at the top, the bottom of the pressure stabilizing water tank (5) is fixed on the bottom plate (7-1), and the pressure stabilizing water tank (5) is opposite to the tail plate (7-3); the liftable upper cover plate (7-4) is sealed in the opening at the top of the test groove body, and the space between the liftable upper cover plate (7-4) and the bottom plate (7-1) is the test seam (7-5); the liftable upper cover plate (7-4) is provided with the grouting opening (7-7); the water outlet (7-6) is arranged at the joint of the tail plate (7-3) and the bottom plate (7-1); the sealing rubber strips (7-8) are arranged in the test seam (7-5) and tightly attached to the bottom plate (7-1) and the liftable upper cover plate (7-4), the two sealing rubber strips (7-8) are parallel to each other and are arranged along the water flow direction, and the distance between the two sealing rubber strips (7-8) is adjustable so as to adjust the width of the test seam (7-5); the compression springs (7-13) are arranged in the sealing rubber strips (7-8) to control the lifting of the lifting upper cover plate (7-4) so as to adjust the height of the test seam (7-5); the pressure plate assembly is arranged on the liftable upper cover plate (7-4) to position the liftable upper cover plate; the flow rate and water pressure sensor (7-10) is arranged on the bottom plate (7-1) to record the flowing range, the water head pressure, the flow rate and the retention quality of the slurry in the test seam (7-5) in real time;
the waste liquid collecting and filtering system (9) is arranged below the water outlets (7-6) and is communicated with the water injection water tank (1);
the support system (8) is arranged below the test tank (7-1) to support and adjust the inclination and the dip angle of the test tank (7-5);
the camera system (10) is arranged above the test groove (7) and can change along with the angle of the test groove (7) so as to monitor the diffusion characteristic in the test seam (7-5) in real time;
the pulping barrel (11) is communicated to a grouting opening (7-7) of the test groove (7) through a grouting pipe (14) so as to enable the pulp to diffuse in a flowing water environment simulated by the test seam (7-5); the grouting pump (12) and the pump control valve (13) are provided on the grouting pipe (14).
2. The multi-working-condition grouting performance test effect evaluation test device under the flowing water condition as claimed in claim 1, wherein the pressure plate assembly comprises longitudinal pressure strips (7-11), transverse pressure strips (7-12) and bolts (7-9) which are arranged on a liftable upper cover plate (7-4); the longitudinal pressing strips (7-11) are arranged on the liftable upper cover plate (7-4), the longitudinal pressing strips (7-11) are arranged along the water flow direction in the test seam (7-5), and the longitudinal pressing strips (7-11) are multiple and parallel to each other; the transverse pressing strips (7-12) are all arranged on the longitudinal pressing strips (7-11) and are vertical to the longitudinal pressing strips (7-11); the bolts (7-9) are connected with the transverse pressing strips (7-12), the liftable upper cover plate (7-4) and the bottom plate (7-1); the adjusting bolts (7-9) enable pressure to be transmitted layer by layer along the transverse pressing strips (7-12), the longitudinal pressing strips (7-11) and the liftable upper cover plate (7-4) and then press the compression springs (7-13) in the sealing rubber strips (7-8) to contract, so that the liftable upper cover plate (7-4) is lowered, and the height of the test seam (7-5) is adjusted.
3. The test device for evaluating the grouting performance test effect under the running water condition according to claim 2, wherein the supporting system (8) comprises two transverse rib columns (8-1) arranged below the bottom plate (7-1), two longitudinal rib columns (8-2) perpendicular to the transverse rib columns (8-1), four spherical supports (8-3), four hydraulic supports (8-4), four bases (8-5), a hydraulic oil pump (8-6), four hydraulic oil pipes (8-7) and an oil pressure gauge (8-8); the spherical support (8-3) is hinged at the vertical crossing part of the transverse rib column (8-1) and the longitudinal rib column (8-2), the spherical support (8-3) is arranged at the upper end of the hydraulic support (8-4), the base (8-5) is arranged at the bottom of the hydraulic support (8-4), and the base (8-5) provides stable supporting force for the supporting system (8); the hydraulic oil pumps (8-6) respectively convey hydraulic oil to the 4 hydraulic supports (8-4) through hydraulic oil pipes (8-7), and each hydraulic support (8-4) is driven to lift according to the requirement of a set angle.
4. The test device for evaluating the grouting performance test effect under the running water condition as claimed in claim 3, wherein the waste liquid collecting and filtering system (9) comprises a waste liquid collecting bin (9-1), a waste liquid filtering grid (9-2), a clear water bin (9-3), a water return pipe (9-4), a water return pump (9-5) and a water return flowmeter (9-6); the waste liquid collecting bin (9-1) and the clear water bin (9-3) are separated by a waste liquid filtering grid (9-2), wherein the waste liquid collecting bin (9-1) is positioned below the water outlet (7-6), the clear water bin (9-3) is communicated to the water injection water tank (1) through a water return pipe (9-4), and a water return pump (9-5) and a water return flowmeter (9-6) are arranged on the water return pipe (9-4).
5. The test device for evaluating the grouting performance test effect under the condition of running water according to claim 4, wherein the camera system (10) comprises a camera (10-1), a transverse bracket (10-2) and a vertical bracket (10-3); the lower end of the vertical support (10-3) is arranged on a side plate (7-2) of the test tank (7), the transverse support (10-2) is connected with the upper end of the vertical support (10-3) and the top of the pressure stabilizing water tank (5), and the transverse support (10-2) and the vertical support (10-3) form a stable truss; the camera (10-1) is arranged on the transverse bracket (10-2) and is positioned above the middle of the test tank (7); the camera system (10) can change according to the angle change of the test groove (7) and is always parallel to the test seam (7-5), and the diffusion characteristic of the slurry in the test seam (7-5) can be monitored in real time.
6. The multi-working-condition grouting performance test effect evaluation test device under the running water condition as claimed in claim 5, wherein the grouting pump (12) comprises a pump pressure gauge (12-1) and a pump flow gauge (12-2); and recording the pressure of the slurry output by the grouting pump through a pump pressure gauge (12-1), and counting the flow of the slurry in each test process through a pump flow gauge (12-2).
7. A test method for evaluating the effect of the multi-working-condition grouting performance test under the condition of dynamic water is characterized in that the method is realized by the test device for evaluating the effect of the multi-working-condition grouting performance test under the condition of dynamic water in claim 6, and comprises the following steps:
step one, measuring hydrogeological conditions and stratum parameters in fractures on an engineering site: hydrodynamic pressure of P Fruit of Chinese wolfberry V is the flow velocity Fruit of Chinese wolfberry And formation porosity of n Fruit of Chinese wolfberry The gap opening is H Fruit of Chinese wolfberry The angle of the crack is alpha Fruit of Chinese wolfberry Or a channel height of H Fruit of Chinese wolfberry A width of L Fruit of Chinese wolfberry Channel inclination angle of alpha Fruit of Chinese wolfberry ；
Step two, according to the hydrogeological condition and the stratum parameters in the step one, the porosity of the test seam is carved in the test groove, and the porosity is n = n Fruit of Chinese wolfberry The gap opening is H = H Fruit of Chinese wolfberry Or channel height H = H Fruit of Chinese wolfberry Width L = L Fruit of Chinese wolfberry Simulating real pore, fracture or large channel stratum conditions;
step three, filling a pore material in the test seam of the test groove to simulate the porosity of n = n Fruit of Chinese wolfberry The height of a compression spring in the sealing rubber strip is increased or reduced by adjusting the length of the bolt, so that the height between the liftable upper cover plate and the bottom plate is H = H Fruit of Chinese wolfberry ；
Or setting the crack height H = H in the test seam of the test groove Fruit of Chinese wolfberry The height of a compression spring in the sealing rubber strip is increased or reduced by adjusting the length of the bolt, so that the height of a crack constructed between the liftable upper cover plate and the bottom plate is H = H Fruit of Chinese wolfberry Consistent with the true formation;
or setting the space height in the test slot of the test groove as H = H Fruit of Chinese wolfberry The height of a compression spring in the sealing rubber strip is increased or reduced by adjusting the length of the bolt, so that the height of a space constructed between the liftable upper cover plate and the bottom plate is H = H Fruit of Chinese wolfberry Adjusting the space width to be L = L by adjusting the distance between the sealing rubber strip and the two side plates Fruit of Chinese wolfberry Consistent with the real working condition;
step four, filling water into the water filling water tank, pumping the water in the water filling water tank into the pressure stabilizing water tank through a water filling pipeline by a water filling pump, wherein the pump pressure of the water filling pump is P Pump and method of operating the same The height of the pressure stabilizing water tank is H Stable According to the formula (1), the water pressure in the test seam is adjusted to the parameter P required by the design Is provided with The water in the pressure stabilizing water tank is conveyed to a test seam of the test tank through the pressure stabilizing filter screen to form stable water pressure P Is provided with ＝P Fruit of Chinese wolfberry Flow ofSpeed v Is provided with ＝ν Fruit of Chinese wolfberry The stable flowing water environment;
P is provided with ＝P Pump and method of operating the same +ρ Water (W) gH Stable (1)
In the formula:
P is provided with -the head pressure required to be reached by the test slot,
P pump -the head pressure of the output of the filling pump,
ρ water (I) -the density of the water,
g-the degree of gravity,
H stable -height of the ballast tank;
step five, a hydraulic oil pump of the supporting system respectively conveys hydraulic oil to 4 hydraulic struts through hydraulic oil pipes, and the inclination angle alpha of the actual stratum fracture or channel is determined Fruit of Chinese wolfberry Setting the angle of the test seam, and driving each hydraulic support to lift by a hydraulic oil pump; the lifting lengths of the 4 hydraulic props are respectively L Left 1 、L Left 2 、L Right 1 、L Right 2 The inclination angle alpha = alpha of stratum fracture or large channel is adjusted according to actual working conditions by hydraulically controlling the hydraulic prop in 4 directions Fruit of Chinese wolfberry The test groove tends to be stable under different inclination angles through the spherical support;
in the formula:
alpha-the simulated fracture dip angle of the test cell,
L left 1 、L Left 2 、L Right 1 、L Right 2 -a raised length of 4 hydraulic props each,
S max、min -the length of the test cell between the highest and lowest points of the hydraulic prop;
step six, preparing the developing dynamic water anti-dispersion grouting material or the grouting material planned to be used in the engineering field in the grouting barrel, pumping the grouting prepared in the grouting barrel to a grouting opening of the test tank through a grouting pipe by a grouting pump, and injecting the grouting into the test tank through the grouting openingIn a running water environment simulated by the test seam; recording the slurry pressure P output by the grouting pump through a pump pressure gauge Pulp and its production process A pump flow meter counts the flow Q of the slurry in each test process;
step seven, monitoring the flow velocity v, the water head pressure P, the longitudinal diffusion distance X, the transverse diffusion distance Y and the slurry retention area S in the test seam through the flow velocity with the transverse interval Sy and the longitudinal interval Sx on the bottom plate of the test tank and the water pressure sensor; calculating to obtain the retention volume V of the slurry according to a formula (3), calculating the retention mass M according to a formula (4), and calculating the longitudinal diffusion radius R of the slurry in the flowing water environment according to a formula (5) Longitudinal direction Calculating the lateral diffusion radius R of the slurry in the flowing water environment according to the formula (6) Longitudinal direction Analyzing the diffusion rule and grouting plugging effect of a grouting material under the condition of flowing water on line;
V＝∫nS x S y (P pump and method of operating the same +P Stable -P)/ρ Water (I) g (3)
M＝ρ Pulp and its production process V＝ρ Pulp and its production process ∫nS x S y (P Pump and method of operating the same +P Stable -P)/ρ Water (I) g (4)
R Longitudinal direction ＝X (5)
R Cross bar ＝Y/2 (6)
In the formula:
v is the volume retained after the slurry is washed,
m is the mass of the slurry left after scouring,
S x -the longitudinal spacing of the flow rate from the water pressure sensor,
S y -the lateral spacing of the flow rate from the water pressure sensor,
n-the number of squares occupied both laterally and longitudinally,
P pump and method of operating the same -the head pressure of the water output by the water injection pump,
P stable -stabilizing the water head pressure of the water tank,
p-ith flow rate and head pressure monitored by the water pressure sensor,
ρ water (W) -the density of the water (W) and,
ρ pulp and its production process -the density of the slurry, and,
g-the degree of gravity,
H stable -the height of the pressure-stabilised water tank,
R cross bar -the lateral diffusion radius of the slurry,
R longitudinal direction -the longitudinal diffusion radius of the slurry,
x is the distance of longitudinal diffusion of the slurry in the test cell,
y is the distance of lateral diffusion of the slurry in the test cell;
monitoring the diffusion characteristics of the slurry in the test seam in real time through a camera system, and recording the diffusion form and the flow direction of the slurry in a flowing water environment;
step nine, passing the mass M of the grouting liquid Injection bottle The ratio of the mass M of the slurry retained in the test tank to the mass of the slurry retained in the test tank can be obtained according to the formula (7):
m is the mass of the slurry left after scouring,
M note that -the mass of the slurry injected into the test cell,
q-statistical slurry flow into the test cell,
ρ pulp and its production process -the density of the slurry;
step ten, muddy water mixed with the slurry and passing through the test tank flows into the waste liquid collecting bin through the water outlet, the muddy water mixed with the slurry in the waste liquid collecting bin flows through the waste liquid filtering grid under the action of osmotic pressure, the muddy water is purified in the process of flowing in the waste liquid filtering grid, clear water enters the clear water bin, the muddy water is left in the waste liquid collecting bin, the clear water filtered in the clear water bin is reinjected into the water injection water tank through the water return pipe by the water return pump, the amount of reclaimed water is counted by the water return flowmeter, and purification and reutilization of the waste water are achieved.
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