CN203772840U - Coal and gas outburst simulation and coal body permeability testing device - Google Patents
Coal and gas outburst simulation and coal body permeability testing device Download PDFInfo
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- CN203772840U CN203772840U CN201420181896.3U CN201420181896U CN203772840U CN 203772840 U CN203772840 U CN 203772840U CN 201420181896 U CN201420181896 U CN 201420181896U CN 203772840 U CN203772840 U CN 203772840U
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Abstract
The utility model discloses a coal and gas outburst simulation and coal body permeability testing device. The coal and gas outburst simulation and coal body permeability testing device comprises an electronic universal testing machine, an outburst simulation and permeability testing device, a first gas system and a confining pressure hydraulic system, wherein the outburst simulation and permeability testing device is composed of a lane simulation mechanism and a lane surrounding simulation mechanism; the lane simulation mechanism comprises a baffle, a permeable plate, a coal rock sample and a U-shaped clamping sleeve; the lane surrounding simulation mechanism comprises a base, a cylinder, a lower pressing head, an upper half concave-surface pressing head, an upper half convex-surface pressing head and a piston; the first gas system comprises a first gas tank, a first decompression valve and a first gas-pressure meter; the confining pressure hydraulic system comprises a confining pressure liquid tank, a hydraulic pump, a confining pressure liquid pressure gauge, a confining pressure liquid overflowing valve and a confining pressure liquid reflowing valve. The coal and gas outburst simulation and coal body permeability testing device can really simulate a coal and gas outburst process of a mine and can be used for testing gas permeability characteristics of lane coal rock bodies and mine deep coal rock bodies, which are influenced by disturbance.
Description
Technical field
The utility model belongs to mine safety technical field, is specifically related to a kind of coal and Gas Outburst simulation and coal body Penetration Signature proving installation.
Background technology
Aspect Study on Coal and gas outburst mechanism, existing theory all points out that the mechanical property of terrestrial stress, gas pressure and coal and rock is the three elements that affect coal and Gas Outburst, but up to now, also fail to determine the three large key elements mechanism of action to coal and Gas Outburst separately, also fail to determine the size of three large key elements on its impact.Therefore, lot of domestic and foreign scholar has carried out the laboratory simulation process of coal and Gas Outburst, also obtain many progress, but, under mine, the terrestrial stress of coal and rock comprises axial compression and confined pressure, and because confined pressure factor is difficult to control, what existing test was multi-control greatly is axial compression and methane gas pressure, can not control confined pressure, be difficult to the mechanism research of confined pressure on coal and Gas Outburst impact, and, existing coal and gas outburst simulation test do not take into full account the impact of disturbance factor, even if consider that disturbing influence is also the impact of considering top board disturbance mostly, and can not measure strength of turbulence and disturbance time, and usually adopting because of cutting coal machine of coal and rock under actual coal mine, development end blow out and the punching of lane side coal and rock etc. is subject to disturbing influence in various degree, also often because of disturbing influence, the mechanical property of coal and rock changes, cause coal and Gas Outburst, this has caused great threat to the normal coal mining in down-hole and personal security, therefore in prior art, the authenticity of coal and Gas Outburst simulation is poor, can't simulate truly the process of coal and Gas Outburst, the accuracy of the data obtaining is not good enough.
And the basis of the Penetration Signature of coal and rock mine generation coal and Gas Outburst and gushing water while being research ore deposit underground mining, therefore the Penetration Signature of Study on Coal rock mass has important engineering significance.Chinese scholars is that the chamber mode of doing experiment is carried out by experiment to the Penetration Signature research of coal and rock mostly, and test can be divided into two classes: the first kind is to carry out the characteristic test of coal and rock Liquid Penetrant by the mode of Liquid Penetrant measurement of discharge; Equations of The Second Kind is to carry out the test of coal and rock gas permeation property by the mode of gas permeation measurement of discharge, test method while carrying out the characteristic test of coal and rock Liquid Penetrant and gas permeation property test is divided into again two kinds: a kind of is in the situation that pressure reduction is stable, measure fluid permeability and cross the flow of coal and rock, i.e. steady state method; Be atmospheric pressure because the side exposed side in tunnel of coal and rock in lane is subject to gaseous tension, internal gas pressure is stabilized in certain value, and therefore steady state method is mainly used in the Penetration Signature of lane side coal and rock to test; Another kind is in pressure reduction change procedure, measures fluid permeability and crosses the flow of coal and rock about the relation of time, i.e. Transient Method; Because the inner gas of the coal and rock of mine deep part is usually because the existence of gas pressure difference is along coal and rock internal crack and hole migration, also because pressure differential in migration process reduces, migration velocity and flow change, and therefore Transient Method is mainly used in the Penetration Signature of mine deep part coal and rock to test.At present, adopt steady state method and Transient Method to carry out the comparatively maturation of technology of coal and rock Liquid Penetrant characteristic test, but, the technology that adopts steady state method and Transient Method to carry out the test of coal and rock gas permeation property is also in development, there is following defect and deficiency: (1) is although can realize three axle seepage tests of gas, but the confined pressure in three axle seepage tests is uncontrollable, can not provide for engineering technical personnel the data of confined pressure factor, thereby engineering technical personnel also just cannot study the impact of confined pressure on the test of coal and rock gas permeation property; But the different depth place of mine, the suffered confined pressure of coal and rock varies in size, and the gas permeation property of coal and rock also can change because of the difference of confined pressure size; (2) in the single shaft seepage tests and three axle seepage tests of gas, all do not consider the impact of disturbance factor, but the coal and rock under mine is often because the factor such as digging laneway and coal mining is subject to disturbing influence in various degree, and then coal and rock internal crack develops and the regularity of distribution changes, cause the seepage characteristic of coal and rock to change, thereby changed the rule such as Gas of coal and rock, therefore research disturbance factor has important practical significance to the Penetration Signature of coal and rock.
Utility model content
Technical problem to be solved in the utility model is for above-mentioned deficiency of the prior art, a kind of coal and Gas Outburst simulation and coal body Penetration Signature proving installation are provided, it realizes convenient, can simulate truly coal and the Gas Outburst of mine, the lane simultaneously can be used in being subject to disturbing influence helps the gas permeation property of coal and rock and mine deep part coal and rock to test, complete function, practical, be convenient to promote the use of.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of coal and Gas Outburst simulation and coal body Penetration Signature proving installation, it is characterized in that: comprise electronic universal tester, outstanding simulation and pervasion test device, the first methane gas system and confined pressure hydraulic system, described outstanding simulation and pervasion test device centering are placed on the base of electronic universal tester;
Described outstanding simulation and pervasion test device are made up of lane side simulation mechanism and lane side surrounding environment simulation mechanism, described lane helps simulation mechanism to comprise the baffle plate of docking successively, air permeable plate, coal petrography sample and U-shaped cutting ferrule, described baffle plate, air permeable plate, it is an entirety that coal petrography sample and U-shaped cutting ferrule are fastened by electrical adhesive tape, described U-shaped cutting ferrule is made up of sleeve pipe and the casing cover that is detachably connected on end, sleeve pipe one end, on the outer wall of described sleeve pipe, be provided with scale, on described casing cover, be connected with snorkel, on described snorkel, be connected with breather valve and gas meter, described baffle plate middle part is provided with the first inlet channel, described air permeable plate middle part is provided with the second inlet channel being connected with the first inlet channel, the surrounding that is positioned at the second inlet channel on described air permeable plate is provided with radial ventilative duct, described lane helps surrounding environment simulation mechanism to comprise base, be fixedly connected on the cylinder barrel and the cover that is fixedly connected on cylinder barrel top of base top, on the sidewall of described cylinder barrel middle part, have the lane side simulation mechanism patchhole inserting for lane side simulation mechanism, described base top centre position place is provided with groove, in described groove, be placed with push-down head, directly over described push-down head, be disposed with from top to bottom first concave surface pressure head, first convex surface pressure head and piston, described piston is through cover, and the centre position place of cover is provided with the through hole passing for piston, the upper surface of described piston be positioned at described electronic universal tester pressure head under, described lane helps simulation mechanism from side simulation mechanism patchhole insertion cylinder barrel inside, described lane, and coal petrography sample is to being sitting between the upper surface of push-down head and the lower surface of first concave surface pressure head, U-shaped cutting ferrule engaging is connected to described lane and helps in simulation mechanism patchhole, the gas access that is provided with the 3rd inlet channel on described base and is connected with the 3rd inlet channel, on described push-down head, be provided with the 4th inlet channel being connected with the 3rd inlet channel, described the 4th inlet channel is connected with the first inlet channel by the first gas transport pipeline, on described base, be provided with the confined pressure liquid flow channel being connected with cylinder barrel inner space, described base sidepiece is provided with the confined pressure liquid entrance being connected with confined pressure liquid flow channel, and described cylinder barrel side is provided with exhausr port, is connected with exhausr port plug on described exhausr port,
Described the first methane gas system comprises the first methane gas tank, and the gas outlet of described the first methane gas tank is connected with gas access by the second gas transport pipeline, on described the second gas transport pipeline, is provided with the first reduction valve and the first rain glass;
Described confined pressure hydraulic system comprises the confined pressure liquid inflow pipe that confined pressure liquid case is connected with confined pressure liquid case with one end, the other end of described confined pressure liquid inflow pipe is connected with confined pressure liquid entrance, on described confined pressure liquid inflow pipe, be connected with hydraulic pump and retaining valve, on one section of confined pressure liquid inflow pipe between hydraulic pump and retaining valve, be connected with confined pressure liquid run-down pipe, on described confined pressure liquid run-down pipe, be connected with confined pressure hydraulic coupling table and confined pressure liquid surplus valve, on one section of confined pressure liquid inflow pipe between retaining valve and confined pressure liquid entrance, be connected with confined pressure liquid recirculatory pipe, on described confined pressure liquid recirculatory pipe, be connected with confined pressure liquid reverse flow valve.
Above-mentioned coal and Gas Outburst simulation and coal body Penetration Signature proving installation, it is characterized in that: comprise the vibration detection device for oscillation intensity is detected, the vibration detection probe of described vibration detection device is placed on the surface of the piston that is positioned at cover outside, or is placed on the surface of the coal petrography sample exposing in dismounting running casing lid rear sleeve; The middle part that is positioned at the piston of cover outside is provided with annular projection, is set with the disturbance ring that is positioned at annular projection top on described piston.
Above-mentioned coal and Gas Outburst simulation and coal body Penetration Signature proving installation, it is characterized in that: comprise the second methane gas system, described the second methane gas system comprises the second methane gas tank, the gas outlet of described the second methane gas tank is connected with snorkel by the 3rd gas transport pipeline, on described the 3rd gas transport pipeline, is provided with the second reduction valve and the second rain glass.
The simulation of above-mentioned coal and Gas Outburst and coal body Penetration Signature proving installation, is characterized in that: between described base and push-down head, between base and cylinder barrel, between cylinder barrel and cover, between first concave surface pressure head and first convex surface pressure head, between sleeve pipe and cylinder barrel, between casing cover and sleeve pipe and be provided with O-ring seal between cover and piston.
Above-mentioned coal and Gas Outburst simulation and coal body Penetration Signature proving installation, is characterized in that: described casing cover is detachably connected on end, sleeve pipe one end by the first bolt; Described cylinder barrel is fixedly connected on base top by the second bolt, and described cover is fixedly connected on cylinder barrel top by the 3rd bolt.
Above-mentioned coal and Gas Outburst simulation and coal body Penetration Signature proving installation, it is characterized in that: the shape of described cylinder barrel outline, the shape of push-down head outline, the shape of coal petrography sample outline, the shape of the shape of sleeve pipe outline and first concave surface pressure head bottom outline is cuboid, the length of described coal petrography sample and the length of push-down head and first concave surface pressure head bottom equal in length, the width of described coal petrography sample and the width of push-down head, the width of the width of sleeve pipe and first concave surface pressure head bottom equates, the height of described coal petrography sample equates with the height of sleeve pipe outline.
Above-mentioned coal and Gas Outburst simulation and coal body Penetration Signature proving installation, it is characterized in that: one end of described the first gas transport pipeline joins by the first rapid-acting coupling and the first inlet channel, the other end of described the first gas transport pipeline joins by the second rapid-acting coupling and the 4th inlet channel.
The simulation of above-mentioned coal and Gas Outburst and coal body Penetration Signature proving installation, is characterized in that: the distance between described annular projection lower surface and the lower surface of piston adds that the overall height of first concave surface pressure head after combination and first convex surface pressure head is greater than the distance between upper surface to the upper surface of push-down head of cover.
Above-mentioned coal and Gas Outburst simulation and coal body Penetration Signature proving installation, is characterized in that: described vibration detection device is that model is the super dynamic signalling analysis system of DH.
Above-mentioned coal and Gas Outburst simulation and coal body Penetration Signature proving installation, is characterized in that: described the 3rd gas transport pipeline joins by the 3rd rapid-acting coupling and snorkel.
The utility model compared with prior art has the following advantages:
1, new simple in structure, easy to assembly of this practicality, is used simple operation.
2, outstanding simulation of the present utility model and pervasion test device are made up of lane side simulation mechanism and lane side surrounding environment simulation mechanism, by with electronic universal tester, the first methane gas system, the second methane gas system and confined pressure hydraulic system, and disturbance ring and vibration detection device are used in conjunction with, can complete the mechanism research of the confined pressure being difficult in prior art on coal and Gas Outburst impact, can be in laboratory, by regulating axial compression, confined pressure and methane gas pressure, simulate truly undisturbed impact and have coal and the Gas Outburst under disturbing influence, and not only can be in axial compression, under the controlled prerequisite of confined pressure and methane gas pressure, carry out the experiment that steady state method under disturbing influence is measured coal and rock gas flow characteristic, tested by the gas permeation property of disturbing influence to lane side coal and rock, can also under the controlled prerequisite of axial compression, confined pressure and methane gas pressure, carry out the experiment of Transient Method mensuration coal and rock gas flow characteristic under disturbing influence, tested by the gas permeation property of disturbing influence to the coal and rock of mine deep part, complete function of the present utility model, can either provide experimental provision for the theoretical research of coal and Gas Outburst, can provide experimental provision to the impact of coal and rock gas permeation property test for engineering technical personnel study confined pressure and disturbance factor again.
3, the surrounding that is positioned at the second inlet channel on air permeable plate of the present utility model is provided with radial ventilative duct, methane gas can carry out the pressurization of gas face to coal petrography sample by the ventilative duct on air permeable plate, pressurize effective, can simulate truly the effect of coal mine gas gaseous tension to coal and rock.
4, on sleeve outer wall of the present utility model, be provided with scale, can be arranged on the scale on sleeve outer wall by observation, make coal petrography sample to being sitting on the upper surface of push-down head, and can make the pressure head of electronic universal tester, by piston, coal petrography sample be loaded to axial compression exactly, contribute to improve the precision of coal and Gas Outburst simulation and the test of coal body Penetration Signature.
6, of the present utility model practical, result of use is good, is convenient to promote the use of.
In sum, the utility model is realized convenient, can simulate truly coal and the Gas Outburst of mine, the lane simultaneously can be used in being subject to disturbing influence helps the gas permeation property of coal and rock and mine deep part coal and rock to test, complete function, practical, be convenient to promote the use of.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of the outstanding simulation of the utility model and pervasion test device.
Description of reference numerals:
1-baffle plate; 2-air permeable plate; 3-coal petrography sample;
4-1-sleeve pipe; 4-2-casing cover; The 5-the first inlet channel;
The 6-the second inlet channel; 7-ventilative duct; 8-base;
9-cylinder barrel; 10-cover; 11-push-down head;
12-first convex surface pressure head; 13-piston; The 14-the three inlet channel;
15-gas access; The 16-the four inlet channel; The 17-the first gas transport pipeline;
18-confined pressure liquid flow channel; 19-confined pressure liquid entrance; 20-exhausr port;
21-exhausr port plug; The 22-the first methane gas tank;
The 23-the second gas transport pipeline; The 24-the first reduction valve;
The 25-the first rain glass; 26-confined pressure liquid case; 27-confined pressure liquid inflow pipe;
28-hydraulic pump; 29-confined pressure liquid run-down pipe; 30-confined pressure hydraulic coupling table;
31-confined pressure liquid surplus valve; 32-confined pressure liquid recirculatory pipe; 33-confined pressure liquid reverse flow valve;
34-snorkel; 35-breather valve; 36-annular projection;
37-disturbance ring; The 38-the second methane gas tank; 39-first concave surface pressure head;
40-electronic universal tester; 41-outstanding simulation and pervasion test device;
42-vibration detection device; 43-retaining valve; 44-O-ring seal;
The 45-the second bolt; The 46-the three bolt;
The 47-the three gas transport pipeline; The 48-the second reduction valve;
The 49-the second rain glass; The 50-the first bolt; 51-gas meter.
Embodiment
As depicted in figs. 1 and 2, the utility model comprises electronic universal tester 40, outstanding simulation and pervasion test device 41, the first methane gas system and confined pressure hydraulic system, and described outstanding simulation and pervasion test device 41 centerings are placed on the base of electronic universal tester 40;
Described outstanding simulation and pervasion test device 41You lane side simulation mechanism and lane side surrounding environment simulation mechanism composition, described lane helps simulation mechanism to comprise the baffle plate 1 of docking successively, air permeable plate 2, coal petrography sample 3 and U-shaped cutting ferrule, described baffle plate 1, air permeable plate 2, it is an entirety that coal petrography sample 3 and U-shaped cutting ferrule are fastened by electrical adhesive tape, described U-shaped cutting ferrule is made up of sleeve pipe 4-1 and the casing cover 4-2 that is detachably connected on end, sleeve pipe 4-1 one end, on the outer wall of described sleeve pipe 4-1, be provided with scale, on described casing cover 4-2, be connected with snorkel 34, on described snorkel 34, be connected with breather valve 35 and gas meter 51, described baffle plate 1 middle part is provided with the first inlet channel 5, described air permeable plate 2 middle parts are provided with the second inlet channel 6 being connected with the first inlet channel 5, the surrounding that is positioned at the second inlet channel 6 on described air permeable plate 2 is provided with radial ventilative duct 7, described lane helps surrounding environment simulation mechanism to comprise base 8, be fixedly connected on the cylinder barrel 9 and the cover 10 that is fixedly connected on cylinder barrel 9 tops at base 8 tops, on described cylinder barrel 9 middle part sidewalls, have the lane side simulation mechanism patchhole inserting for lane side simulation mechanism, described base 8 crown center positions are provided with groove, in described groove, be placed with push-down head 11, directly over described push-down head 11, be disposed with from top to bottom first concave surface pressure head 39, first convex surface pressure head 12 and piston 13, described piston 13 is through cover 10, and the centre position place of cover 10 is provided with the through hole passing for piston 13, the upper surface of described piston 13 be positioned at described electronic universal tester 40 pressure head under, described lane helps simulation mechanism from side simulation mechanism patchhole insertion cylinder barrel 9 inside, described lane, and coal petrography sample 3 is to being sitting between the upper surface of push-down head 11 and the lower surface of first concave surface pressure head 39, U-shaped cutting ferrule engaging is connected to described lane and helps in simulation mechanism patchhole, the gas access 15 that is provided with the 3rd inlet channel 14 on described base 8 and is connected with the 3rd inlet channel 14, on described push-down head 11, be provided with the 4th inlet channel 16 being connected with the 3rd inlet channel 14, described the 4th inlet channel 16 is connected with the first inlet channel 5 by the first gas transport pipeline 17, on described base 8, be provided with the confined pressure liquid flow channel 18 being connected with cylinder barrel 9 inner spaces, described base 8 sidepieces are provided with the confined pressure liquid entrance 19 being connected with confined pressure liquid flow channel 18, described cylinder barrel 9 sides are provided with exhausr port 20, on described exhausr port 20, are connected with exhausr port plug 21,
Described the first methane gas system comprises the first methane gas tank 22, the gas outlet of described the first methane gas tank 22 is connected with gas access 15 by the second gas transport pipeline 23, is provided with the first reduction valve 24 and the first rain glass 25 on described the second gas transport pipeline 23;
Described confined pressure hydraulic system comprises the confined pressure liquid inflow pipe 27 that confined pressure liquid case 26 is connected with confined pressure liquid case 26 with one end, the other end of described confined pressure liquid inflow pipe 27 is connected with confined pressure liquid entrance 19, on described confined pressure liquid inflow pipe 27, be connected with hydraulic pump 28 and retaining valve 43, on one section of confined pressure liquid inflow pipe 27 between hydraulic pump 28 and confined pressure retaining valve 43, be connected with confined pressure liquid run-down pipe 29, on described confined pressure liquid run-down pipe 29, be connected with confined pressure hydraulic coupling table 30 and confined pressure liquid surplus valve 31, on one section of confined pressure liquid inflow pipe 27 between retaining valve 43 and confined pressure liquid entrance 19, be connected with confined pressure liquid recirculatory pipe 32, on described confined pressure liquid recirculatory pipe 32, be connected with confined pressure liquid reverse flow valve 33.
In the present embodiment, the utility model also comprises the vibration detection device 42 for oscillation intensity is detected, the vibration detection probe of described vibration detection device 42 is placed on the surface of the piston 13 that is positioned at cover 10 outsides, or is placed on the surface of the coal petrography sample 3 exposing in dismounting running casing lid 4-2 rear sleeve 4-1; The middle part that is positioned at the piston 13 of cover 10 outsides is provided with annular projection 36, is set with the disturbance ring 37 that is positioned at annular projection 36 tops on described piston 13.
In the present embodiment, the utility model also comprises the second methane gas system, described the second methane gas system comprises the second methane gas tank 38, the gas outlet of described the second methane gas tank 38 is connected with snorkel 34 by the 3rd gas transport pipeline 47, is provided with the second reduction valve 48 and the second rain glass 49 on described the 3rd gas transport pipeline 47.
In the present embodiment, between described base 8 and push-down head 11, between base 8 and cylinder barrel 9, between cylinder barrel 9 and cover 10, between first concave surface pressure head 39 and first convex surface pressure head 12, between sleeve pipe 4-1 and cylinder barrel 9, between casing cover 4-2 and sleeve pipe 4-1 and be provided with O-ring seal 44 between cover 10 and piston 13.
In the present embodiment, described casing cover 4-2 is detachably connected on end, sleeve pipe 4-1 one end by the first bolt 50; Described cylinder barrel 9 is fixedly connected on base 8 tops by the second bolt 45, and described cover 10 is fixedly connected on cylinder barrel 9 tops by the 3rd bolt 46.
In the present embodiment, shape, the shape of sleeve pipe 4-1 outline and the shape of first concave surface pressure head 39 bottom outlines of the shape of described cylinder barrel 9 outlines, the shape of push-down head 11 outlines, coal petrography sample 3 outlines are cuboid, the length of the length of described coal petrography sample 3 and push-down head 11 and first concave surface pressure head 39 bottoms equal in length, the width of described coal petrography sample 3 equates with width, the width of sleeve pipe 4-1 and the width of first concave surface pressure head 39 bottoms of push-down head 11, and the height of described coal petrography sample 3 equates with the height of sleeve pipe 4-1 outline.
In the present embodiment, one end of described the first gas transport pipeline 17 joins by the first rapid-acting coupling and the first inlet channel 5, and the other end of described the first gas transport pipeline 17 joins by the second rapid-acting coupling and the 4th inlet channel 16.
In the present embodiment, the distance between described annular projection 36 lower surfaces and the lower surface of piston 13 adds that the overall height of first concave surface pressure head 39 after combination and first convex surface pressure head 12 is greater than the distance between upper surface to the upper surface of push-down head 11 of cover 10.
In the present embodiment, the super dynamic signalling analysis system that described vibration detection device 42 is DH5960 for model.
In the present embodiment, described the 3rd gas transport pipeline 47 joins by the 3rd rapid-acting coupling and snorkel 34.
When the utility model uses, the assembling process of outstanding simulation and pervasion test device 41 is:
(1) baffle plate 1, air permeable plate 2, coal petrography sample 3 and the described U-shaped cutting ferrule that dock being successively fastened by electrical adhesive tape is an entirety, is combined into lane side simulation mechanism;
(2) push-down head 11 is placed in described groove, and the 4th inlet channel 16 is connected with the 3rd inlet channel 14, and one end of the first gas transport pipeline 17 is connected on the 4th inlet channel 16;
(3) cylinder barrel 9 is fixedly connected on to base 8 tops;
(4) one end of helping simulation mechanism to have baffle plate 1 in described lane is inserted described lane and is helped in simulation mechanism patchhole, and is arranged on the scale on sleeve pipe 4-1 outer wall by observation, makes coal petrography sample 3 to being sitting on the upper surface of push-down head 11; When concrete enforcement, the distance that known seat 8 centers to cylinder barrel 9 has a side side of lane side simulation mechanism patchhole is l
1, and the half of the length of known coal petrography sample 3 is l
2, by formula l=l
1-l
2just can calculate the distance l that side to cylinder barrel 9 that sleeve pipe 4-1 stretches into cylinder barrel 9 inside has a side side of lane side simulation mechanism patchhole, and this scale that can be arranged on sleeve pipe 4-1 outer wall by observation apart from l is learnt;
(5) other end of the first gas transport pipeline 17 is connected on the first inlet channel 5;
(6) first concave surface pressure head 39 is aligned on the upper surface that is positioned over coal petrography sample 3, and place first convex surface pressure head 12 at the top of first concave surface pressure head 39;
(7) piston 13 is passed and is arranged in the through hole at cover 10 centre position places, and cover 10 is fixedly connected on to cylinder barrel 9 tops, ensure the central alignment of piston 13 center and first convex surface pressure head 12 simultaneously.
After outstanding simulation and pervasion test device 41 have assembled, the second gas transport pipeline 23 is connected on gas access 15; Confined pressure liquid inflow pipe 27 is connected on confined pressure liquid entrance 19; The outstanding simulation that assembling is completed and pervasion test device 41 centerings are placed on the base of electronic universal tester 40, and make the upper surface of piston 13 be positioned at described electronic universal tester 40 pressure head under.
When carrying out the lower coal of undisturbed impact and Gas Outburst while simulating, carry out according to following steps:
Step 1, coal supply rock sample 3 load axial compression: the pressure head of electronic universal tester 40 presses down piston 13 according to speed parameter and the pressure parameter set; For example, setting speed parameter is 0.4mm/min～0.6mm/min, and set pressure parameter is 3MPa～5MPa;
Step 2, coal supply rock sample 3 load confined pressure: take off the exhausr port plug 21 being connected on exhausr port 20, open exhausr port 20, open the feed liquor switch of confined pressure liquid surplus valve 31, open described confined pressure hydraulic system, confined pressure liquid in confined pressure liquid case 26 warp after the second hydraulic pump 37 pressurizations is flowed in cylinder barrel 9 by confined pressure liquid inflow pipe 27 and confined pressure liquid entrance 19, in the time that exhausr port 20 has confined pressure liquid to flow out, exhausr port plug 21 is connected on exhausr port 20, close exhausr port 20; By at operation confined pressure liquid surplus valve 31, can regulate the size of confined pressure;
Step 3, simulation methane gas pressure: first, close breather valve 35, then, open the switch of the first reduction valve 24, open described the first methane gas system, methane gas in the first methane gas tank 22 is entered in the first inlet channel 5 and the second inlet channel 6 by the second gas transport pipeline 23 and gas access 15 to warp after 0.8MPa～1MPa by the first reduction valve 24 decompression, and enters in bleeder vent road 7; After 24～48 hours, close the switch of the first reduction valve 24;
Coal and Gas Outburst under step 4, the impact of simulation undisturbed: dismounting running casing lid 4-2, coal and gas form outstanding.
In the time that needs have coal under disturbing influence and Gas Outburst simulation, step 1 and the step 2 coal lower with carrying out undisturbed impact is identical with Gas Outburst simulation, and difference is: the methane gas in step 3 in the first methane gas tank 22 is entered in the first inlet channel 5 and the second inlet channel 6 by the second gas transport pipeline 23 and gas access 15 by the first reduction valve 24 warp after 0.5MPa～0.7MPa that reduces pressure; The detailed process of step 4 is as follows: step 401, dismounting running casing lid 4-2, and the vibration detection probe of vibration detection device 42 is placed on the surface of the coal petrography sample 3 exposing in sleeve pipe 4-1, open vibration detection device 42; Step 402, disturbance ring 37 is mentioned and decontroled, make disturbance ring 37 impact annular projection 36 from eminence along the downward free fall type of piston 13, form the shock vibration to coal petrography sample 3, and constantly repeat this perturbation process, until that coal and gas form is outstanding; In perturbation process, the oscillation intensity that vibration detection device 42 produces disturbance detects and stores.
In the time that needs adopt steady state method to carry out the test of coal body Penetration Signature, step 1 is simulated identical with step 2 and the coal and the Gas Outburst that carry out under undisturbed impact, difference is: step 3, coal supply rock sample 3 loads methane gas pressure: first, open breather valve 35, then, open the switch of the first reduction valve 24, open described the first methane gas system, after methane gas in the first methane gas tank 22 reduces pressure by the first reduction valve 24, warp is entered in the first inlet channel 5 and the second inlet channel 6 by the second gas transport pipeline 23 and gas access 15, and enter in bleeder vent road 7, step 4, the methane gas flow that coal petrography sample 3 under disturbing influence is permeated detect, its detailed process is as follows: step 401, the vibration detection probe of vibration detection device 42 is placed on the surface of the piston 13 that is positioned at cover 10 outsides, opens vibration detection device 42, step 402, disturbance ring 37 is mentioned and decontroled, make disturbance ring 37 impact annular projection 36 from eminence along the downward free fall type of piston 13, form the shock vibration to coal petrography sample 3, in perturbation process, vibration detection device 42 detects and stores disturbance quantity, and meanwhile, gas meter 51 is penetrated in sleeve pipe 4-1 to process coal petrography sample 3 and the methane gas flow flowing in snorkel 34 detects in real time, the data on flows that step 403, operating personnel's time recording gas meter 51 detect, and draw out the time dependent curve of data on flows.
In the time that needs adopt Transient Method to carry out the test of coal body Penetration Signature, step 1 is simulated identical with step 2 and the coal and the Gas Outburst that carry out under undisturbed impact, difference is: step 3, coal supply rock sample 3 loads methane gas pressure: first, open breather valve 35, then, open the switch of the first reduction valve 24 and the switch of the second reduction valve 48, open described the first methane gas system and described the second methane gas system, and regulate the first reduction valve 24 and the second reduction valve 48, the gaseous tension that makes on the first rain glass 25 and the second rain glass 49 to show equates and is a
1mPa, after methane gas in the first methane gas tank 22 reduces pressure by the first reduction valve 24, warp is entered in the first inlet channel 5 and the second inlet channel 6 by the second gas transport pipeline 23 and gas access 15, and enter in bleeder vent road 7, after the methane gas in the second methane gas tank 38 reduces pressure by the second reduction valve 48, warp is entered in U-shaped cutting ferrule 4 by the 3rd gas transport pipeline 47 and snorkel 34, after 5～10 minutes, close the switch of the first reduction valve 24 and the switch of the second reduction valve 48, wherein, a
1span be 0.5MPa～0.7MPa, step 4, the methane gas flow that coal petrography sample 3 under disturbing influence is permeated detect, its detailed process is as follows: step 401, the vibration detection probe of vibration detection device 50 is placed on the surface of the piston 13 that is positioned at cover 10 outsides, opens vibration detection device 50, step 402, open the switch of the first reduction valve 24 and regulate the first reduction valve 24, making the gaseous tension showing on the first rain glass 25 is a
2mPa, after 10～20 seconds, closes the switch of the first reduction valve 24, wherein, a
2>a
1and a
2-a
1span be 0.3MPa～0.6MPa, step 403, disturbance ring 37 is mentioned and decontroled, make disturbance ring 37 impact annular projection 36 from eminence along the downward free fall type of piston 13, form the shock vibration to coal petrography sample 3, in perturbation process, the oscillation intensity that vibration detection device 50 produces disturbance detects and stores, gas meter 51 detects in real time to the methane gas flow being penetrated in U-shaped cutting ferrule 4 and in inflow snorkel 34 through coal petrography sample 3, the data on flows that step 404, operating personnel's time recording gas meter 51 detect, and draw out the time dependent curve of data on flows.
The above; it is only preferred embodiment of the present utility model; not the utility model is imposed any restrictions; every any simple modification of above embodiment being done according to the utility model technical spirit, change and equivalent structure change, and all still belong in the protection domain of technical solutions of the utility model.
Claims (10)
1. a coal and Gas Outburst simulation and coal body Penetration Signature proving installation, it is characterized in that: comprise electronic universal tester (40), outstanding simulation and pervasion test device (41), the first methane gas system and confined pressure hydraulic system, described outstanding simulation and pervasion test device (41) centering are placed on the base of electronic universal tester (40);
Described outstanding simulation and pervasion test device (41) are made up of lane side simulation mechanism and lane side surrounding environment simulation mechanism, described lane helps simulation mechanism to comprise the baffle plate (1) of docking successively, air permeable plate (2), coal petrography sample (3) and U-shaped cutting ferrule, described baffle plate (1), air permeable plate (2), it is an entirety that coal petrography sample (3) and U-shaped cutting ferrule are fastened by electrical adhesive tape, described U-shaped cutting ferrule is made up of sleeve pipe (4-1) and the casing cover (4-2) that is detachably connected on sleeve pipe (4-1) end, one end, on the outer wall of described sleeve pipe (4-1), be provided with scale, on described casing cover (4-2), be connected with snorkel (34), on described snorkel (34), be connected with breather valve (35) and gas meter (51), described baffle plate (1) middle part is provided with the first inlet channel (5), described air permeable plate (2) middle part is provided with the second inlet channel (6) being connected with the first inlet channel (5), the surrounding that is positioned at the second inlet channel (6) on described air permeable plate (2) is provided with radial ventilative duct (7), described lane helps surrounding environment simulation mechanism to comprise base (8), be fixedly connected on the cylinder barrel (9) at base (8) top and be fixedly connected on the cover (10) at cylinder barrel (9) top, on the sidewall of described cylinder barrel (9) middle part, have the lane side simulation mechanism patchhole inserting for lane side simulation mechanism, described base (8) crown center position is provided with groove, in described groove, be placed with push-down head (11), directly over described push-down head (11), be disposed with from top to bottom first concave surface pressure head (39), first convex surface pressure head (12) and piston (13), described piston (13) is through cover (10), and the centre position place of cover (10) is provided with the through hole passing for piston (13), the upper surface of described piston (13) be positioned at described electronic universal tester (40) pressure head under, described lane helps simulation mechanism from side simulation mechanism patchhole insertion cylinder barrel (9) inside, described lane, and coal petrography sample (3) is to being sitting between the upper surface of push-down head (11) and the lower surface of first concave surface pressure head (39), U-shaped cutting ferrule engaging is connected to described lane and helps in simulation mechanism patchhole, the gas access (15) that is provided with the 3rd inlet channel (14) on described base (8) and is connected with the 3rd inlet channel (14), on described push-down head (11), be provided with the 4th inlet channel (16) being connected with the 3rd inlet channel (14), described the 4th inlet channel (16) is connected with the first inlet channel (5) by the first gas transport pipeline (17), on described base (8), be provided with the confined pressure liquid flow channel (18) being connected with cylinder barrel (9) inner space, described base (8) sidepiece is provided with the confined pressure liquid entrance (19) being connected with confined pressure liquid flow channel (18), described cylinder barrel (9) side is provided with exhausr port (20), is connected with exhausr port plug (21) on described exhausr port (20),
Described the first methane gas system comprises the first methane gas tank (22), the gas outlet of described the first methane gas tank (22) is connected with gas access (15) by the second gas transport pipeline (23), on described the second gas transport pipeline (23), is provided with the first reduction valve (24) and the first rain glass (25);
Described confined pressure hydraulic system comprises the confined pressure liquid inflow pipe (27) that confined pressure liquid case (26) is connected with confined pressure liquid case (26) with one end, the other end of described confined pressure liquid inflow pipe (27) is connected with confined pressure liquid entrance (19), on described confined pressure liquid inflow pipe (27), be connected with hydraulic pump (28) and retaining valve (43), be positioned on the one section of confined pressure liquid inflow pipe (27) between hydraulic pump (28) and retaining valve (43) and be connected with confined pressure liquid run-down pipe (29), on described confined pressure liquid run-down pipe (29), be connected with confined pressure hydraulic coupling table (30) and confined pressure liquid surplus valve (31), be positioned on the one section of confined pressure liquid inflow pipe (27) between retaining valve (43) and confined pressure liquid entrance (19) and be connected with confined pressure liquid recirculatory pipe (32), on described confined pressure liquid recirculatory pipe (32), be connected with confined pressure liquid reverse flow valve (33).
2. according to coal claimed in claim 1 and Gas Outburst simulation and coal body Penetration Signature proving installation, it is characterized in that: comprise the vibration detection device (42) for oscillation intensity is detected, the vibration detection probe of described vibration detection device (42) is placed on the surface that is positioned at the outside piston (13) of cover (10), or is placed on the surface of the coal petrography sample (3) exposing in dismounting running casing lid (4-2) rear sleeve (4-1); The middle part that is positioned at the outside piston (13) of cover (10) is provided with annular projection (36), is set with the disturbance ring (37) that is positioned at annular projection (36) top on described piston (13).
3. according to coal claimed in claim 2 and Gas Outburst simulation and coal body Penetration Signature proving installation, it is characterized in that: comprise the second methane gas system, described the second methane gas system comprises the second methane gas tank (38), the gas outlet of described the second methane gas tank (38) is connected with snorkel (34) by the 3rd gas transport pipeline (47), on described the 3rd gas transport pipeline (47), is provided with the second reduction valve (48) and the second rain glass (49).
4. according to the simulation of the coal described in claim 1,2 or 3 and Gas Outburst and coal body Penetration Signature proving installation, it is characterized in that: between described base (8) and push-down head (11), between base (8) and cylinder barrel (9), between cylinder barrel (9) and cover (10), between first concave surface pressure head (39) and first convex surface pressure head (12), between sleeve pipe (4-1) and cylinder barrel (9), between casing cover (4-2) and sleeve pipe (4-1) and be provided with O-ring seal (44) between cover (10) and piston (13).
5. according to the coal described in claim 1,2 or 3 and Gas Outburst simulation and coal body Penetration Signature proving installation, it is characterized in that: described casing cover (4-2) is detachably connected on sleeve pipe (4-1) end, one end by the first bolt (50); Described cylinder barrel (9) is fixedly connected on base (8) top by the second bolt (45), and described cover (10) is fixedly connected on cylinder barrel (9) top by the 3rd bolt (46).
6. according to claim 1, coal described in 2 or 3 and Gas Outburst simulation and coal body Penetration Signature proving installation, it is characterized in that: the shape of described cylinder barrel (9) outline, the shape of push-down head (11) outline, the shape of coal petrography sample (3) outline, the shape of the shape of sleeve pipe (4-1) outline and first concave surface pressure head (39) bottom outline is cuboid, the length of the length of described coal petrography sample (3) and push-down head (11) and first concave surface pressure head (39) bottom equal in length, the width of the width of described coal petrography sample (3) and push-down head (11), the width of the width of sleeve pipe (4-1) and first concave surface pressure head (39) bottom equates, the height of described coal petrography sample (3) equates with the height of sleeve pipe (4-1) outline.
7. according to the coal described in claim 1,2 or 3 and Gas Outburst simulation and coal body Penetration Signature proving installation, it is characterized in that: one end of described the first gas transport pipeline (17) joins by the first rapid-acting coupling and the first inlet channel (5), the other end of described the first gas transport pipeline (17) joins by the second rapid-acting coupling and the 4th inlet channel (16).
8. according to the simulation of the coal described in claim 1,2 or 3 and Gas Outburst and coal body Penetration Signature proving installation, it is characterized in that: the distance between described annular projection (36) lower surface and the lower surface of piston (13) adds that the overall height of first concave surface pressure head (39) after combination and first convex surface pressure head (12) is greater than the distance between upper surface to the upper surface of push-down head (11) of cover (10).
9. according to the coal described in claim 2 or 3 and Gas Outburst simulation and coal body Penetration Signature proving installation, it is characterized in that: the super dynamic signalling analysis system that described vibration detection device (42) is DH5960 for model.
10. according to coal claimed in claim 3 and Gas Outburst simulation and coal body Penetration Signature proving installation, it is characterized in that: described the 3rd gas transport pipeline (47) joins by the 3rd rapid-acting coupling and snorkel (34).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420181896.3U CN203772840U (en) | 2014-04-15 | 2014-04-15 | Coal and gas outburst simulation and coal body permeability testing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420181896.3U CN203772840U (en) | 2014-04-15 | 2014-04-15 | Coal and gas outburst simulation and coal body permeability testing device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105910913A (en) * | 2016-06-27 | 2016-08-31 | 河南理工大学 | Test system and method for coal and gas outburst induced by impact load under coal sample of raw coal |
| CN106050295A (en) * | 2016-04-28 | 2016-10-26 | 西安科技大学 | Gas gushing simulating system used in physics resemble simulation experiments |
-
2014
- 2014-04-15 CN CN201420181896.3U patent/CN203772840U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106050295A (en) * | 2016-04-28 | 2016-10-26 | 西安科技大学 | Gas gushing simulating system used in physics resemble simulation experiments |
| CN105910913A (en) * | 2016-06-27 | 2016-08-31 | 河南理工大学 | Test system and method for coal and gas outburst induced by impact load under coal sample of raw coal |
| CN105910913B (en) * | 2016-06-27 | 2018-12-04 | 河南理工大学 | Shock loading induces coal and gas prominent pilot system and method under raw coal sample |
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