CN207488086U - The experimental rig of Blasting Excavation off-load under the three-dimensional loading environment of simulation - Google Patents
The experimental rig of Blasting Excavation off-load under the three-dimensional loading environment of simulation Download PDFInfo
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- CN207488086U CN207488086U CN201721585051.0U CN201721585051U CN207488086U CN 207488086 U CN207488086 U CN 207488086U CN 201721585051 U CN201721585051 U CN 201721585051U CN 207488086 U CN207488086 U CN 207488086U
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Abstract
The utility model discloses the experimental rigs of Blasting Excavation off-load under the three-dimensional loading environment of simulation.The device includes reaction frame, bearing plate, hydraulic jack, blast hole, connect bolt, hydraulic jack control switch, hydraulic jack control circuit, hydraulic power unit, fluid pressure line, computer, Blasting Control switchs, explosion lead, foil gauge, hole, connecting plate, screw hole, analog material sample, deformeter, nut.The utility model can realize the simulation test of Blasting Excavation after the first loading under three-dimensional loading environment.
Description
Technical field
The utility model belongs to Underground Engineering Excavation technical field, is related to Blasting Excavation under a kind of three-dimensional loading environment of simulation
The experimental rig of off-load.
Background technology
With China's mine working, traffic tunnel and national defence and the fast development of underground power house construction, the underground space
Utilization gradually develop to deep, geological conditions becomes increasingly complex.Off-load is excavated in underground engineering and generates energetic disturbance, is drawn
Roadway surrounding rock is played to generate rock burst, squeeze the engineering problems such as large deformation and zonal fracturing, while cause the wide of domestic and foreign scholars
General concern becomes the hot and difficult issue of rock mechanics field research.Rock burst is mainly the energetic disturbance triggering generated due to explosion
's.The excavation method of underground engineering at present mainly has two kinds of drilling and blasting method and mechanical excavation.Drilling and blasting method is drilled using rock drill, then
Explosive is packed into hole, by ignition charge breaking surrounding rock, the unloding speed of drilling and blasting method, which is exceedingly fast, can regard transient unloading excavation as,
Stronger energetic disturbance wave can be generated in blasting process.Mechanical excavation mainly utilizes the cutting head broken rock of development machine, development machine
In the rock stratum such as the shale, mud stone and Sandy Silt of more soft developmental joint fissure, there is higher drivage efficiency.But due to pick
Into machine in tunneling process, integrality and the preferable solid rock of robustness can be usually encountered, development machine is caused to cut rock ratio
It is more difficult, and pick (cutter on cutting head) consumption is increased considerably, cause greatly improving for construction cost.Machinery is opened
Off-load is dug compared with Blasting Excavation off-load, the rate of mechanical excavation off-load is smaller.During underground engineering construction, off-load is excavated
Actually rock mass is released in the stress of excavation face, has broken original mechanical balance state, and rock mass is made to carry out stress tune
It is whole, generate new deformation.Different excavation methods corresponds to different excavation unloading stress paths, drilling and blasting method Blasting Excavation off-load
Rate is exceedingly fast, and has important researching value for the stresses re-distribution (Stress relief) of Study of The Underground engineering explosion country rock.
In rock mechanics, mainly pass through theory analysis, indoor model test and numerical simulation three kinds of technique study underground construction processes
Influence of the off-load to improving stability of surrounding rocks in roadway and destruction is excavated, there are mainly two types of mode excavation simulation off-loads for indoor model test：
It first excavates to load and first load afterwards and excavate afterwards.
At present, the destructive process of hole wall mostly is simulated using the Experimental Method in Laboratory loaded afterwards is first excavated, but first excavated
The analogy method loaded afterwards does not match, therefore with being in certain ambient stress before underground engineering construction in order to preferably grind
Study carefully destruction and the mechanical property of roadway surrounding rock, first load the test method excavated afterwards closer to Practical Project.Some scholars use
In hole plus off-load method analog mechanical excavate off-load, but for Blasting Excavation off-load under true triaxial loading environment research but
It is rarely reported.Patent of the country in terms of Underground Engineering Excavation off-load, such as application No. is 201610220535.9, utility model
Entitled " a kind of experimental rig realized in rock pore different stress paths and add off-load ", publication date：On August 17th, 2016, it is public
A kind of experimental rig realized in rock pore different stress paths and add off-load is opened, which passes through to the sample containing prefabricated hole
Pressurize in hole, then in unloading port pressure method excavation simulation off-load, entire process of testing is sample trepanning → loading → hole
Release in interior pressurization → hole can not realize the experiment process for first loading and excavating afterwards.It is practical new application No. is 201610551010.3
Type is entitled " roadway excavation unloading model experimental rig and test method ", publication date：On September 7th, 2016, discloses a kind of lane
Road excavates unloading model experimental rig and test method, the patent in prefabricated tunnel by lower bearing plate, on bearing plate and side
Excavation off-load of the bearing plate to pressure in the application well of tunnel, then the process simulation tunnel of off-load, after this method belongs to first excavation
Loading, it is different from the excavation unloading process in engineering practice.Application No. is 201510228942.X, utility model is entitled " suitable
For the excavation relief arrangement of geomechanical model test ", publication date：On August 12nd, 2015 discloses a kind of suitable for geology
The excavation relief arrangement of Mechanical Model Test, the patent excavate the surrounding rock of chamber in model test off-load overall process into Mobile state
Simulation, is not directed to rock sample and first loads the experiment process excavated afterwards.Application No. is 201610028031.7, utility model title
For " simulation roadway excavates the test method of off-load ", publication date：It on June 15th, 2016 discloses a kind of simulation roadway excavation and unloads
The test method of lotus, the test method of the patent to Surrounding Rock Masses of Roadway gradually, quick relief carry out real simulation, embody different lanes
Surrouding rock deformation, crackle are generated road section configuration and the influence of development, this method load after belonging to first trepanning, and off-load is added in hole
Experiment, it is different from the form of construction work (excavating off-load under rock mass stress condition) at scene.
Above-mentioned patent first loads the test method excavated afterwards without introducing, before making the more identical construction of test method
Ambient stress, for the research of Blasting Excavation off-load under true triaxial loading environment, but few people make inquiries.
Utility model content
In order to achieve the above object, the utility model provides a kind of examination for simulating Blasting Excavation off-load under three-dimensional loading environment
Experiment device is solved to Blasting Excavation off-load research is less under true triaxial loading environment and first excavates the method loaded afterwards and underground
The problem of not matching in certain ambient stress before engineering construction is, it can be achieved that quick-fried after first loading under three-dimensional loading environment
Break the simulation test of digging.
The utility model is the technical scheme adopted is that the threedimensional model of experimental rig includes reaction frame, bearing plate, hydraulic pressure
Jack connects bolt, and connecting plate, screw hole, nut, each loading surface is made of polylith bearing plate in threedimensional model, and every piece is held
It is connected between pressing plate by connecting plate, connecting plate is equipped with screw hole, and connection bolt is connect across screw hole with nut, adjacent two pieces
Bearing plate is connected by connection bolt, nut with connecting plate, and hydraulic pressure thousand is equipped on five loading surfaces of left-right and front-back on threedimensional model
Jin top, hydraulic jack withstands on each three row of face spaced set, and often row is equidistantly set there are three hydraulic jack, on bearing plate
Nine hydraulic jacks of even distribution, often arranging above hydraulic jack has reaction frame, and the pedestal of hydraulic jack is connect with reaction frame,
Hydraulic jack is connected by hydraulic jack control circuit with hydraulic jack control switch, and hydraulic jack passes through hydraulic tube
Road is connected with hydraulic power unit, and hydraulic power unit is connected with computer, and hole is equipped in the bearing plate of former and later two loading surface centers,
Analog material sample is internally provided with many places blast hole, and blast hole is connected by explosion lead with Blasting Control switch, analog material
Embedded foil gauge, foil gauge are connected by conducting wire with deformeter inside sample, and deformeter is connected with computer.
Further, the reaction frame, bearing plate, connecting plate, hydraulic jack connect bolt, nut, hydraulic jack
Control switch, hydraulic jack control circuit, hydraulic power unit, fluid pressure line composition hydraulic jack add uninstalling system.
Further, each loading surface of the threedimensional model by 9 pieces of bearing plates by connecting bolt, nut and connection
Plate is attached assembling and is formed.
Further, the area of each loading surface is small compared with the surface area of analog material sample.
Further, the model RC-502 of the hydraulic jack.
Further, the model BE120-5AA of the foil gauge.
Further, the model SDY2107A of the deformeter.
The utility model compared with prior art, has the advantages that：(1) simple and flexible, the device each load
Face is attached by 9 pieces of bearing plates by connecting bolt, nut and connecting plate, simple in structure flexible, convenient for assembly and disassembly；
(2) applied widely, bearing plate of the device in arrangement explosion hole face can open up identical according to the shape of drift section
Hole (including circle, square, the shape of a hoof, stalk arch etc.), in order to which the clast cleaning after explosion and installation monitoring are taken the photograph
The destructive process of hole wall country rock is observed as head；(3) simulation of Blasting Excavation after first loading under three-dimensional loading environment can be achieved
Experiment, the device carry out sample using hydraulic jack the interior that true triaxial loading environment Imitating tunnel blasting excavates off-load
Influence of the energetic disturbance to the destructive process of roadway surrounding rock in blasting process is studied in experiment；(4) roadway surrounding rock explosion can be monitored
Stress relief process in journey, the test method combination underground engineering borehole blasting excavation construction mode based on the experimental rig,
Pre-plugged foil gauge in analog material sample monitors the deformation of roadway surrounding rock and stresses re-distribution process in blasting process, is
Research roadway surrounding rock Stress relief process provides new method.
Description of the drawings
It in order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the overall structure figure of the utility model experimental rig；
Fig. 2 is the front view of the utility model experimental rig；
Fig. 3 is the utility model experimental rig A-A sectional views；
Fig. 4 is pressure-bearing plate structure schematic diagram；
The adjacent bearing plate connection diagrams of Fig. 5；
Fig. 6 is the three-dimensional loading schematic diagram in tri- directions of rock sample X, Y, Z.
In figure, 1. reaction frames, 2. bearing plates, 3. hydraulic jacks, 4. blast holes, 5. connection bolts, 6. hydraulic jacks
Control switch, 7. hydraulic jack control circuits, 8. hydraulic power units, 9. fluid pressure lines, 10. computers, 11. Blasting Controls switch,
12. explosion lead, 13. foil gauges, 14. holes, 15. connecting plates, 16. screw holes, 17. analog material samples, 18. deformeters, 19.
Nut.
Specific embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
It clearly and completely describes, it is clear that the described embodiments are only a part of the embodiments of the utility model rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without making creative work
All other embodiments obtained shall fall within the protection scope of the present invention.
As shown in Figs. 1-5, the threedimensional model of experimental rig includes reaction frame 1 to the structure of the utility model experimental rig, holds
Pressing plate 2, hydraulic jack 3 connect bolt 5, and connecting plate 15, screw hole 16, nut 19, each loading surface is by polylith in threedimensional model
Bearing plate 2 forms, and is connected between every piece of bearing plate 2 by connecting plate 15, and connecting plate 15 is equipped with screw hole 16, and connection bolt 5 is worn
It crosses screw hole 16 to connect with nut 19, adjacent two pieces of bearing plates 2 are connected by connection bolt 5, nut 19 with connecting plate 15, three-dimensional mould
Be equipped with hydraulic jack 3 in type on five loading surfaces of left-right and front-back, hydraulic jack 3 in three row of every face spaced set,
Hydraulic jack 3 there are three equidistantly setting often is arranged, nine hydraulic jacks 3 is uniformly distributed on bearing plate 2, often arranges hydraulic jack
There are reaction frame 1 in 3 tops, and the pedestal of hydraulic jack 3 is connect with reaction frame 1, and hydraulic jack 3 passes through hydraulic jack control line
Road 7 is connected with hydraulic jack control switch 6, and hydraulic jack 3 is connected by fluid pressure line 9 with hydraulic power unit 8, hydraulic power unit
8 are connected with computer 10, are equipped with hole 14 in the bearing plates 2 of former and later two loading surface centers, inside analog material sample 17
Equipped with many places blast hole 4, blast hole 4 is connected by explosion lead 12 with Blasting Control switch 11, inside analog material sample 17
Embedded foil gauge 13, foil gauge 13 are connected by conducting wire with deformeter 18, and deformeter 18 is connected with computer 10.
Reaction frame 1, bearing plate 2, connecting plate 15, hydraulic jack 3 connect bolt 5, nut 19, hydraulic jack control
Switch 6, hydraulic jack control circuit 7, hydraulic power unit 8, fluid pressure line 9 form hydraulic jack and add uninstalling system.
Hydraulic jack 3 is set to be loaded on five faces of upper left-right and front-back of threedimensional model, device can be realized each
The independent loads in face and the specific function individually unloaded study single side unloading under six face loading environment of three-dimensional and are converted into five face of three-dimensional
Load the destruction characteristic of material.
The threedimensional model of the utility model device includes reaction frame 1, bearing plate 2, and hydraulic jack 3 connects bolt 5, even
Fishplate bar 15, screw hole 16, nut 19, each loading surface of threedimensional model by 9 pieces of bearing plates 2 by connect bolt 5, nut 19 and
Connecting plate 15 is attached assembling and is formed, and six loading surfaces form laboratory, and the space of laboratory is tried for pouring analog material
Sample 17.The area of each loading surface is slightly smaller compared with the surface area of analog material sample 17, is reserved in analog material sample 17 per one side
A certain distance to prevent from contacting the bearing plate 2 in two neighboring face due to analog material sample 17 deforms, causes to damage, just
In assembly and disassembly.The size of change bearing plate 2 is needed according to experiment, is matched with analog material sample 17.It is opened according to explosion
The shape of section is dug, the hole of shape size all same is opened up in the centre of the bearing plate 2 of former and later two loading surface centers
14。
The model of hydraulic jack 3 selects RC-502, ability to work 50T, stroke 50.8mm, and body height is
176mm, the utility model select the hydraulic jack 3 of this model mainly to consider three aspects：(1) work of hydraulic jack 3
Ability：The length of side of each piece of bearing plate is 100mm, then can be calculated according to the ability to work of the hydraulic jack of the model 3 should
The loading range of power is 0-50MPa, can meet the experimental study of analog material of the bearing capacity in the range of 0-50MPa；(2)
The stroke of hydraulic jack 3：In rock-soil mechanics laboratory test, the deformation of similar materials is relatively small, for this model
The stroke 50.8mm of hydraulic jack 3 can meet the requirement of laboratory test；(3) body height of hydraulic jack 3：Selected
After the ability to work and stroke of hydraulic jack 3, in order to reduce the volume of experimental rig, select body height smaller as possible
Hydraulic jack 3.The basic functional principle of hydraulic jack 3：Oil pressure drive valve piston is upward during release, and the oil in fuel tank passes through
Oil pipe and one-way cock are sucked into valve piston lower part, and oil pressure drives valve piston downward during pressurization, fuel tank and valve piston lower part oil circuit
It is blocked by one-way cock, the oil of valve piston lower part is pressed into big piston lower portion by internal oil passages and one-way cock, because lever is made
Increasing decades of times with valve piston low pressure, big piston area is the decades of times of valve piston area again, and oil pressure is got into big piston,
Know that size piston area ratio is identical with pressure ratio by pascal's principle.What the hydraulic jack 3 in the utility model primarily served
Effect is that analog material sample 17 is loaded and unloaded.It is connected by fluid pressure line 9 with hydraulic power unit 8, in hydraulic power unit 8
High pressure oil be injected into inside hydraulic jack 3 by fluid pressure line 9, push hydraulic jack 3 piston motion.
The model BE120-5AA, grid long 5mm, grid width 2.8mm, 120 Ω of resistance that foil gauge 13 is selected.
In 17 casting process of analog material sample, pre-plugged foil gauge 13, the position of foil gauge 13 and different tunnels
Section configuration it is relevant, for the tunnel of different cross section shape, the arrangement of blast hole 4 is not quite similar, it should according to
Cross-section shape of roadway arrange blast hole, for the stalk arch in the utility model arrangement as shown in fig. 1, pouring
During sample, the arrangement of the blast hole 4 in Fig. 1 marks, to bury explosive in corresponding position.
Foil gauge 13 is connect with deformeter 18, and deformeter 18 is connect with computer reads in data.Explosive in blast hole is drawn by explosion
Line 12 connects, and controlled blasting is carried out by Blasting Control switch 11.It is set in the bearing plate 2 of former and later two loading surface centers
Hole 14, the destructive process monitoring that the clast cleaning and installation that hole 14 is used for after explosion are used for observing hole wall country rock are taken the photograph
As head.
The model SDY2107A of deformeter 18 has small, bridge autobalance, bandwidth, high certainty of measurement, makes an uproar
The advantages of sound is low, stability is good, strong antijamming capability, is calibrated using dial switch, accurate convenient.
Embodiment
A kind of test method for simulating Blasting Excavation off-load under three-dimensional loading environment is using a kind of three-dimensional loading environment of simulation
The experimental rig of lower Blasting Excavation off-load, according to tests below step：
Step 1: the processing of analog material sample 17：The bearing plate in four faces all around of threedimensional model is fixed,
Pouring for analog material sample 17 is carried out in intermediate experiment room, carries out pouring analog material sample on the upside of threedimensional model
17, blast hole 4 and embedded foil gauge 13 are arranged according to cross-section shape of roadway, during sample is poured, according to different tunnels
The different location of blast hole 4 in section configuration, marks, to bury explosive in corresponding position；
Step 2: fixed similar material sample 17：Square analog material sample 17 is placed on a kind of three-dimensional loading item of simulation
Power of the uninstalling system to vertical direction application 0-1kN is added by hydraulic jack in the experimental rig of Blasting Excavation off-load under part,
Then it loading in the horizontal direction, the size of power is equal with the power of vertical direction, although former and later two loading surfaces open up hole 14,
But the bearing plate 2 of each loading surface has formd an entirety, makes analog material in the loading procedure of hydraulic jack 3
17 front and rear sides uniform force of sample ensures that the power size that tri- directions of X, Y, Z apply is identical under the control of computer software, hangs down
For Nogata to for the Z-direction in Fig. 6, horizontal direction is the X-direction and Y-direction in Fig. 6；
Step 3: three-dimensional loading：Analog material sample 17 is fixed on Blasting Excavation under a kind of three-dimensional loading environment of simulation and unloads
After the experimental rig of lotus, while keep tri- direction loading speeds of X, Y, Z identical, using hydraulic jack 3 by vertical direction
It is horizontal with the triaxiality at the stress loading to set depth of horizontal direction, to simulate the ambient stress of different depth；
Step 4: simulation Blasting Excavation off-load：There is hydraulic jack on five loading surfaces of upper left-right and front-back of threedimensional model
Top 3, hydraulic jack 3 set three rows in every one side, and often arranging 3 top of hydraulic jack has reaction frame 1, and liquid is controlled by computer 10
The amount of high pressure oil in press pump station 8, high pressure oil are injected by fluid pressure line 9 inside hydraulic jack 3, push hydraulic jack 3
Piston motion, hydraulic jack 3 are acted on bearing plate 2, and hole is equipped in the bearing plate 2 of former and later two loading surface centers
14, clast cleaning and installation that hole 14 is used for after explosion are used for observing the destructive process monitoring camera of hole wall country rock, root
Suitable explosive is buried according to the arrangement of different cross-section shape of roadway Blasting Excavations, so as to form corresponding blast hole 4, even
Explosion lead 12 is connected, controlled blasting is carried out by Blasting Control switch 11；
Step 5: explosion data process＆analysis：After ignition charge, tunnel in blasting process is acquired by deformeter 18 and is enclosed
The stress-strain data of rock, data are handled by computer 10；
Step 6: installation monitoring camera：After completing Blasting Excavation, in tunnel, axis direction installation monitoring camera is real-time
The destructive process of tunnel hole wall country rock is monitored, continues to increase vertical stress, hole is monitored in real time by video camera and acoustic emission system
The destructive process of wall.
The power fixed in the utility model step 2 used in similar material sample 17 should be moderate, do not answer it is excessive or too small, such as
Fruit fixed force is excessive, then analog material sample 17 can be caused to damage, and influences mechanical characteristic under sample three-dimensional stress condition
Experimental study, it is similar during reinforcing in the horizontal direction after vertical direction applies fixed force if fixed force is too small
The beginning of material sample 17 stress is slightly uneven, then will result in moving and losing fixed function for analog material sample 17；Step
Rapid three during experiment, keeps tri- direction loading speeds of X, Y, Z identical, eliminates shadow of the loading speed difference to result of the test
It rings.Loading speed speed can influence the development of 17 underbead crack of analog material sample, and then influence result of the test, while can also
Using the experimental study of trepanning after the first loading under the different loading speeds of present apparatus progress, and then loading speed is studied to rock burst
Affecting laws；In step 4, hydraulic jack 3, which is acted on bearing plate 2, is conducive to 17 uniform stressed of analog material sample, eliminates
17 stress raisers of analog material sample, if hydraulic jack 3 directly acts on the surface of analog material sample 17, with phase
There was only the top size of hydraulic jack 3 like the contact area of material sample 17, then cannot cover entire analog material sample 17,
Therefore stress raisers can be generated at contact surface, causes Stress non-homogeneity.The each loading surface of the device is by 9 pieces of bearing plates 2
It is attached by connecting bolt 5, nut 19 and connecting plate 15, it is simple in structure flexible, convenient for assembly and disassembly；Front and rear loading surface
The shape of the interior hole 14 according to needed for opening up the shape of drift section of the bearing plate 2 in centre position is (including round, square, horse
Ungulate, stalk arch etc.), and hole 14 can also be convenient for the clast cleaning after explosion and installation monitoring camera to observe
The destructive process of hole wall country rock；The utility model carries out true triaxial loading environment Imitating lane using hydraulic jack 3 to sample
The laboratory test of road Blasting Excavation off-load studies influence of the energetic disturbance to the destructive process of roadway surrounding rock in blasting process；This
Utility model combination underground engineering borehole blasting excavation construction mode, the pre-plugged foil gauge 13 in analog material sample 17, prison
The stresses re-distribution process of roadway surrounding rock in blasting process is surveyed, new method is provided for research roadway surrounding rock Stress relief process.
It should be noted that herein, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any this practical relationship or sequence.Moreover, term " comprising ", "comprising" or its any other variant are intended to
Non-exclusive inclusion, so that process, method, article or equipment including a series of elements not only will including those
Element, but also including other elements that are not explicitly listed or further include as this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
Also there are other identical elements in process, method, article or equipment including the element.
Each embodiment in this specification is described using relevant mode, identical similar portion between each embodiment
Point just to refer each other, and the highlights of each of the examples are difference from other examples.
The above is only the preferred embodiment of the utility model only, is not intended to limit the protection model of the utility model
It encloses.Any modification, equivalent substitution, improvement and etc. made within the spirit and principles of the present invention, are all contained in this reality
With in novel protection domain.
Claims (7)
1. the experimental rig of Blasting Excavation off-load under the three-dimensional loading environment of simulation, which is characterized in that the threedimensional model of experimental rig
Including reaction frame (1), bearing plate (2), hydraulic jack (3), connection bolt (5), connecting plate (15), screw hole (16), nut
(19), each loading surface is made of polylith bearing plate (2) in threedimensional model, passes through connecting plate (15) between every piece of bearing plate (2)
Connection, connecting plate (15) are equipped with screw hole (16), and connection bolt (5) is connect across screw hole (16) with nut (19), and adjacent two
Block bearing plate (2) is connected by connection bolt (5), nut (19) with connecting plate (15), five loadings of left-right and front-back on threedimensional model
Hydraulic jack (3) is equipped on face, hydraulic jack (3) is equidistantly equipped with three in three row of every face spaced set, often row
A hydraulic jack (3) is uniformly distributed nine hydraulic jacks (3) on bearing plate (2), and often arranging has above hydraulic jack (3)
Reaction frame (1), the pedestal of hydraulic jack (3) are connect with reaction frame (1), and hydraulic jack (3) is controlled by hydraulic jack
Circuit (7) controls switch (6) to be connected with hydraulic jack, and hydraulic jack (3) passes through fluid pressure line (9) and hydraulic power unit (8)
It is connected, hydraulic power unit (8) is connected with computer (10), and hole is equipped in the bearing plate (2) of former and later two loading surface centers
(14), analog material sample (17) is internally provided with many places blast hole (4), and blast hole (4) passes through explosion lead (12) and explosion control
System switch (11) is connected, and embedded foil gauge (13), foil gauge (13) pass through conducting wire and deformeter inside analog material sample (17)
(18) it is connected, deformeter (18) is connected with computer (10).
2. the experimental rig of Blasting Excavation off-load under the three-dimensional loading environment of simulation according to claim 1, which is characterized in that
The reaction frame (1), bearing plate (2), connecting plate (15), hydraulic jack (3), connection bolt (5), nut (19), hydraulic pressure thousand
Jin top control switch (6), hydraulic jack control circuit (7), hydraulic power unit (8), fluid pressure line (9) composition hydraulic jack add
Uninstalling system.
3. the experimental rig of Blasting Excavation off-load under the three-dimensional loading environment of simulation according to claim 1, which is characterized in that
Each loading surface of the threedimensional model is by 9 pieces of bearing plates (2) by connecting bolt (5), nut (19) and connecting plate (15)
Assembling is attached to be formed.
4. the experimental rig of Blasting Excavation off-load under the three-dimensional loading environment of simulation according to claim 2, which is characterized in that
The area of each loading surface is small compared with the surface area of analog material sample (17).
5. the experimental rig of Blasting Excavation off-load under the three-dimensional loading environment of simulation according to claim 1, which is characterized in that
The model RC-502 of the hydraulic jack (3).
6. the experimental rig of Blasting Excavation off-load under the three-dimensional loading environment of simulation according to claim 1, which is characterized in that
The model BE120-5AA of the foil gauge (13).
7. the experimental rig of Blasting Excavation off-load under the three-dimensional loading environment of simulation according to claim 1, which is characterized in that
The model SDY2107A of the deformeter (18).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107807051A (en) * | 2017-11-23 | 2018-03-16 | 中南大学 | Simulate the experimental rig and test method of Blasting Excavation off-load under three-dimensional loading environment |
| CN109708953A (en) * | 2019-01-31 | 2019-05-03 | 河南城建学院 | Three axis load sample cylinder of release window adjustable type and its experimental method |
| CN111678753A (en) * | 2020-07-03 | 2020-09-18 | 河海大学 | Underground cavern simulation experiment device and experiment method |
| CN114992187A (en) * | 2022-08-03 | 2022-09-02 | 中国矿业大学(北京) | Multifunctional balanced loading device and method for model test |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107807051A (en) * | 2017-11-23 | 2018-03-16 | 中南大学 | Simulate the experimental rig and test method of Blasting Excavation off-load under three-dimensional loading environment |
| CN109708953A (en) * | 2019-01-31 | 2019-05-03 | 河南城建学院 | Three axis load sample cylinder of release window adjustable type and its experimental method |
| CN109708953B (en) * | 2019-01-31 | 2021-06-22 | 河南城建学院 | Pressure-relief-window-adjustable triaxial-loading sample cylinder and experimental method thereof |
| CN111678753A (en) * | 2020-07-03 | 2020-09-18 | 河海大学 | Underground cavern simulation experiment device and experiment method |
| CN114992187A (en) * | 2022-08-03 | 2022-09-02 | 中国矿业大学(北京) | Multifunctional balanced loading device and method for model test |
| CN114992187B (en) * | 2022-08-03 | 2022-11-01 | 中国矿业大学(北京) | Multifunctional balanced loading device and method for model test |
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