CN106483267B - Simulation test device and method for vivid coal and gas outburst - Google Patents
Simulation test device and method for vivid coal and gas outburst Download PDFInfo
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- CN106483267B CN106483267B CN201610903360.1A CN201610903360A CN106483267B CN 106483267 B CN106483267 B CN 106483267B CN 201610903360 A CN201610903360 A CN 201610903360A CN 106483267 B CN106483267 B CN 106483267B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/22—Fuels, explosives
- G01N33/222—Solid fuels, e.g. coal
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/22—Fuels, explosives
- G01N33/225—Gaseous fuels, e.g. natural gas
Abstract
A simulation test device and a simulation test method for the outburst of realistic coal and gas are characterized in that the coal body has three mechanical zones, is acted by a top plate and has the gas partition distribution characteristics through the movement of the top plate, energy transfer and continuous gas supply under the action of stress and gas pressure, and then the outburst evolution process of the coal and the gas in front of a working face is more truly simulated. The device consists of a bracket, a cavity, a cover plate, a stress loading system, a gas filling system, a parameter recording system and a seal. The three-zone stress simulation is realized by loading the cover plate simulation top plate with different thicknesses and rigidity in a partition mode through the oil cylinder, gas is sealed through the sealing strip between the cover plate and the cavity, the gas can be distributed in a partition mode, the screen sealing is used for simulating the delay outburst of the exposed coal wall, the sealing is suddenly opened to simulate the cross cut coal uncovering outburst, and paraffin melting or drilling simulation tunneling outburst is realized. The method can simulate the coal and gas outburst environment, influence factors, boundary conditions and evolution generation process more truly, and can also simulate the coupling effect of the roadside stress and the gas and the evolution process.
Description
Technical field
The present invention relates to a kind of coal and gas prominent simulation test device and method, especially a kind of moulded coal true to nature and gas
Prominent simulation test device and method.
Background technique
The coal rock dynamic disasters such as coal (rock) and gas (methane or carbon dioxide) protrusion, coal and gas extrusion, bump
It is the major casualty of high methane and deep coalmine exploitation.With the increasing of mine excavation depth and mining rate, mine gas is prominent
Out, the coal rock dynamic disasters such as bump are on the rise and complexity, disasters danger significantly increase, while original some without dynamic
Power disaster or the unconspicuous mine of sign also gradually show now, and the life security and mine for seriously threatening underground labour are just
Often production.
Both at home and abroad prominent mechanism, influence factor, pests occurrence rule, outburst prediction and prevention and treatment aspect largely grind
Study carefully, makes great progress and preventive effect.But the coal constantly occurred shows that coal and gas prominent mechanism is non-with gas accident
Often complicated, influence factor is numerous, its major influence factors basic research understands at present, but prominent various factors coupling process, evolution
Process etc. is still unclear.
In recent years, domestic that prominent simulation test is increasingly paid attention to.Experimental provision from small-sized to medium-sized and large-scale development, by
Load balance is loaded to subregion to be developed.How stress and gas by front of the practical coal mine work area of truer simulation or lane
Coupling, evolutionary process and environment on coalface, prominent process, have Railway Project to need to solve: (1) can simulate different top plates
Carrying effect and stress, energy release and transfer process；(2) it is (original with " three bands " of development process that prominent evolution can be simulated
Stress zone, extending stress band and release drainage) evolutionary process and effect；(3) the subregion distribution of gas in front of working face can be simulated
Characteristic, gas pressure and content are low in release drainage, and gas pressure is high in extending stress band；(4) postponing bursting disaster can be simulated
And process；(5) the subarea management effect and its evolutionary process of stress and gas can be simulated；(5) it comprehensive monitoring and can disclose
Various response signals and changes in distribution rule, and then further disclose coal seam with gas deformation fracture and prominent evolutionary process.
Summary of the invention
Technical problem: the present invention be directed to demand and problems of the prior art, provide a kind of moulded coal true to nature with watt
This protrudes simulation test device and method, solves stress and gas by the practical coal mine work area front of truer simulation or lane
The problem of coupling, evolutionary process, prominent process and response signal comprehensive monitoring.
Technical solution: realize that the moulded coal true to nature of the object of the invention and gas outburst simulation test device include: bracket, chamber
Body, stress loading system, fills gas train, reference record system and sealing at cover board；Bottom is fixed with cavity in bracket,
There is cover board in upside in cavity, is connected with stress loading system on the cover board；There is sealing in one end of cavity, on the side wall of cavity
Have and fill gas interface and monitoring sensor installation port, monitoring sensor is connect with reference record system.
The cover board is the force transmitting board that a periphery has sealing strip, by the material, thickness and the rigidity mould that select cover board
The roof of quasi- different-thickness and intensity, top plate is thicker, harder, and top plate is stronger to the effect of coal body, and stress in coal bed is concentrated
Degree is higher, and it is bigger that intensity occurs for dynamic disaster.
The cavity is the U-type groove of an inner wall smooth, and facade has an opening on front side of U-type groove length direction, simulates tunnel
Section, in the outer installation sealing of opening and sealing sealing ring；U-type groove internal upper part has cover board, arranges on rear side of U-type groove with another two side elevation
Have and multiple fills gas interface and sensor installation port；Device coal body sample and gas is filled in U-type groove；Pass through the lid of side edge thereof
Sealing gas between plate sealing strip, sealing sealing ring and cavity makes gas cannot be by coal body periphery freedom in addition to coal body seepage flow
Space intercommunication keeps the distribution of different location gas subregion；Gas mouth sustainable supply on rear side of U-type groove, simulation are kept during prominent
Coal mine coal-bed gas sustainable supply.
The gas train of filling includes gas gas source, pressure reducing valve, pressure and flow divider valve and gas pipe, and gas pipe connects
Connect filling on gas interface in U-type groove；Gas is confessed from gas gas source, passes through pressure reducing valve decompression, pressure and flow divider valve
It adjusts, from the gas interface of gas pipe and different location, into cavity, coal body fills the gas of different pressures.
The sealing further includes open-type and the sealing of sieve type, and open-type simulates tunnel postponing bursting and drilling, driving
It induces and protrudes, sieve sealing moment, which opens, simulates exposure coal wall driving protrusion, also analog drilling spray orifice and crossdrift gas drainage under suction
Exposed coal is prominent afterwards.
The reference record system, including at least multiple stress in coal bed, deformation, the temperature for being installed on U-type groove different location
Degree, gas pressure, flow velocity, sound emission, electromagnetic radiation and electric potential signal sensor, each sensor are connect with acquisition and recording instrument.It is logical
The distribution and variation for monitoring and analyzing each monitoring parameters are crossed, the various index response patterns of prominent evolutionary process are disclosed, including is answered
Power Evolution, crack Evolution, temperature changing regularity, gas pressure and flow field Evolution, current potential Evolution and its
Correlativity.
The stress loading system includes gusset, hydraulic cylinder, transverse slide and load bearing cross beam, the liquid
Compressing cylinder at least 6, the upper end of hydraulic cylinder is connect with transverse slide, and transverse slide is connected to load bearing cross beam
On, transverse slide is connected in bracket, and the lower end of hydraulic cylinder is connect by gusset with cover board；Stress loading system is logical
It crosses cover board to load to coal body, release drainage-extending stress band-primitive stress band coal and rock three can be simulated and added with curve stress
It carries；Hard lid is passed through when coal mass relief is destroyed near front openings to coal body or coal seam with gas coupling load by cover board
Plate shifts stress and energy to deep, and extending stress band stress increases, and stress gradient increases, and makees to coal body mechanics near coal wall
With enhancing, acted on than more accurately simulating top plate.
The sealing is connected by a hinge in the opening side of U-type groove, and sealing sealing is connected in U-type groove opening
Circle, is connected with the quick-opening device of sealing in the opening other side of U-type groove；The sealing have hermetic type sealing, paraffin channel closure,
Open-type sealing and the sealing of sieve type；Wherein, it is prominent to throw open simulation stone door punching coal for hermetic type sealing；The stone
Ceratuba sealing fusing simulation driving protrudes；The open-type sealing simulation tunnel postponing bursting and drilling, driving are induced and are protruded；
The described sieve type sealing moment, which opens, simulates exposure coal wall driving and protrudes, also after analog drilling spray orifice and crossdrift gas drainage under suction
Exposed coal is prominent.
Moulded coal true to nature and gas outburst simulation test method:
(1) before testing, top plate type is selected first, determines cover plate materials, thickness and rigidity, selects prominent test type,
Determine closure types；
(2) before filling sample, first stress loading system and cover board are removed, first with hermetic type sealing or paraffin pipe in front of U-type groove
Sealing, coal sample is packed into, moulded coal, which need to repeatedly coaling, is compacted into molding coal sample, and raw coal need to make processing sealed around；
(3) before loading, load cover board and sample contacts are kept, then each region starts to be loaded onto given applied stress；
(4) load after the completion of, it is each fill gas mouth by setting pressure and flow be filled with gas, reach adsorption equilibrium；It needs
When sieve type being wanted to seal, it should be ensured that stress and gas pressure are not enough to protrude, and slowly open hermetic type sealing, are changed to sieve type
Sealing, further according to needing increasing stress and gas pressure；
(5) it according to coal body, stress, Gas explosion burns and accordingly seals, open mode, simulate corresponding prominent test process；
When not occurring prominent, gas pressure or stress can be continued growing, until protruding；
(6) gas filled to test coal body, after balance, rezone loading stress, Observable and analyze subregion gas pressure with
The relationship of stress；
(7) by various underlying parameters variation can simulate realistically live coal and gas prominent environment, influence factor,
Boundary condition and evolution and generating process, simulation lane side stress and gas coupling and evolutionary process, by monitoring and analyzing
The distribution and variation of each monitoring parameters, disclose the various index response patterns of prominent evolutionary process, including stress Evolution, split
Gap Evolution, temperature changing regularity, gas pressure and flow field Evolution, current potential Evolution and its correlativity.
Beneficial effect, by adopting the above-described technical solution, lower living with top plate by stress, methane pressure gradient effect
Dynamic, energy transfer and gas sustainable supply, coal body there are mechanics three with, by top plate effect and gas subregion distribution characteristics, in turn
Compare loaded coal body in front of real simulation working face, destruction, coal and gas prominent evolution and development process.The present invention passes through oil cylinder
For subregion loading simulation three with stress, the cover board of different-thickness and rigidity simulates top plate, can be than more accurately simulating working face before
The effect of top plate and the transmitting effect to stress, energy by the lane Fang Huo；Pass through the sealing ring sealing bearing bush between cover board, sealing and cavity
This and subregion fill gas, and gas is made subregion can be kept to be distributed, and can be distributed than more accurately simulating the subregion of gas in coal wall；It is logical
It crosses hermetic type sealing and throws open that simulation stone door punching coal is prominent, and paraffin channel closure fusing simulation driving protrudes, open-type seal mould
Quasi- tunnel postponing bursting is induced with drilling, driving to be protruded, and sieve type sealing moment, which opens, simulates exposure coal wall driving protrusion, can also
Exposed coal is prominent after simulation drilling spray orifice and crossdrift gas drainage under suction, can simulate various protrusions and composite power phenomenon；It realizes complete
Space, overall process and multi signal high speed detection, monitoring information amount are big, comprehensive.Purposes is wide, can simulate realistically coal and gas
Prominent environment, influence factor, boundary condition and evolution and generating process also stress and gas coupling and are drilled by analog lane
Change process.
Detailed description of the invention
Fig. 1 is moulded coal true to nature and gas outburst simulation test device schematic diagram of the invention.
In figure: 1- bracket；2- transverse slide；3- load bearing cross beam；4- hydraulic cylinder；5- gusset；6- cover board；7- lid
Plate sealing strip；8- cavity；9- hinge；10- sealing；11- seals sealing ring；12- drill bit；13- quick-opening device；14- fills gas mouth；
15- sensor installation port.
Specific embodiment:
Moulded coal true to nature and gas outburst simulation test device of the invention includes: bracket 1, cavity 8, cover board 6, stress loading
System fills gas train, reference record system and sealing 10；Bottom is fixed with cavity 8 in bracket 1, and upside has in cavity 8
Cover board 6 is connected with stress loading system on cover board 6；There is sealing 10 in one end of cavity, has on the side wall of cavity and fill gas
Interface and monitoring sensor installation port, monitoring sensor are connect with reference record system.
The cover board 6 is the force transmitting board that a periphery has sealing strip 7, by the material, thickness and the rigidity that select cover board 6
The roof of different-thickness and intensity is simulated, top plate is thicker, harder, and top plate is stronger to the effect of coal body, stress in coal bed collection
Middle degree is higher, and it is bigger that intensity occurs for dynamic disaster.
The cavity 8 is the U-type groove of an inner wall smooth, and facade has an opening on front side of U-type groove length direction, simulates tunnel
Section, in the outer installation sealing 10 of opening and sealing sealing ring 11；U-type groove internal upper part has on rear side of cover board 6U type groove and another two side elevation
It is disposed with and multiple fills gas interface 14 and sensor installation port 15；Device coal body sample and gas is filled in U-type groove；Pass through cover board
The cover plate for sealing item 7 at 6 edges seals sealing gas between sealing ring 11 and cavity, pass through gas cannot in addition to coal body seepage flow
The free space intercommunication of coal body periphery keeps the distribution of different location gas subregion；Gas mouth on rear side of U-type groove is kept to hold during prominent
Continuous supply, simulates coal mine coal-bed gas sustainable supply.
The gas train of filling includes gas gas source, pressure reducing valve, pressure and flow divider valve and gas pipe, and gas pipe connects
Connect filling on gas interface 14 in U-type groove；Gas is confessed from gas gas source, passes through pressure reducing valve decompression, pressure and assignment of traffic
Valve regulation, from the gas interface of gas pipe and different location, into cavity, coal body fills the gas of different pressures.
The sealing further includes open-type and the sealing of sieve type, and open-type simulates tunnel postponing bursting and drilling, driving
It induces and protrudes, sieve sealing moment, which opens, simulates exposure coal wall driving protrusion, also analog drilling spray orifice and crossdrift gas drainage under suction
Exposed coal is prominent afterwards；
The reference record system, including at least multiple stress in coal bed, deformation, the temperature for being installed on U-type groove different location
Degree, gas pressure, flow velocity, sound emission, electromagnetic radiation and electric potential signal sensor, each sensor are connect with acquisition and recording instrument.It is logical
The distribution and variation for monitoring and analyzing each monitoring parameters are crossed, the various index response patterns of prominent evolutionary process are disclosed, including is answered
Power Evolution, crack Evolution, temperature changing regularity, gas pressure and flow field Evolution, current potential Evolution and its
Correlativity.The acquisition and recording instrument is commercial product.
The stress loading system includes gusset 5, hydraulic cylinder 4, transverse slide 2 and load bearing cross beam 3, described
Hydraulic cylinder 4 at least 6, the upper end of hydraulic cylinder 4 is connect with transverse slide 2, and transverse slide 2, which is connected to, holds
On weight crossbeam 3, transverse slide 2 is connected in bracket, and the lower end of hydraulic cylinder 4 is connect by gusset 5 with cover board 6；It answers
Force loading system is loaded by cover board 6 to coal body, and release drainage-extending stress band-primitive stress band coal and rock three can be simulated
Band curve stress loading；By cover board 6 to coal body or coal seam with gas coupling load, coal mass relief is destroyed near front openings
When, stress and energy are shifted to deep by hard cover board 6, extending stress band stress increases, and stress gradient increases, to coal wall
Neighbouring coal body mechanical function enhancing, than more accurately simulating top plate effect.
The sealing 10 is connected to the opening side of U-type groove by hinge 9, and it is close to be connected with sealing in U-type groove opening
Seal 11 is connected with the quick-opening device 13 of sealing 10 in the opening other side of U-type groove；The sealing 10 have hermetic type sealing,
Paraffin channel closure, open-type sealing and the sealing of sieve type；Wherein, it is prominent to throw open simulation stone door punching coal for hermetic type sealing
Out；The paraffin channel closure fusing simulation driving protrudes；The open-type sealing simulation tunnel postponing bursting and drilling, pick
It is protruded into inducing；The sieve type sealing moment opens simulation exposure coal wall driving and protrudes, also analog drilling spray orifice and stone
Exposed coal is prominent after door gas drainage under suction.
Moulded coal true to nature and gas outburst simulation test method of the invention, steps are as follows:
(1) before testing, top plate type is selected first, determines cover plate materials, thickness and rigidity, selects prominent test type,
Determine closure types；
(2) before filling sample, first stress loading system and cover board are removed, first with hermetic type sealing or paraffin pipe in front of U-type groove
Sealing, coal sample is packed into, moulded coal, which need to repeatedly coaling, is compacted into molding coal sample, and raw coal need to make processing sealed around；
(3) before loading, load cover board and sample contacts are kept, then each region starts to be loaded onto given applied stress；
(4) load after the completion of, it is each fill gas mouth by setting pressure and flow be filled with gas, reach adsorption equilibrium；It needs
When sieve type being wanted to seal, it should be ensured that stress and gas pressure are not enough to protrude, and slowly open hermetic type sealing, are changed to sieve type
Sealing, further according to needing increasing stress and gas pressure；
(5) it according to coal body, stress, Gas explosion burns and accordingly seals, open mode, simulate corresponding prominent test process；
When not occurring prominent, gas pressure or stress can be continued growing, until protruding；
(6) gas filled to test coal body, after balance, rezone loading stress, Observable and analyze subregion gas pressure with
The relationship of stress；
(7) by various underlying parameters variation can simulate realistically live coal and gas prominent environment, influence factor,
Boundary condition and evolution and generating process, simulation lane side stress and gas coupling and evolutionary process, by monitoring and analyzing
The distribution and variation of each monitoring parameters, disclose the various index response patterns of prominent evolutionary process, including stress Evolution, split
Gap Evolution, temperature changing regularity, gas pressure and flow field Evolution, current potential Evolution and its correlativity.
Claims (6)
1. a kind of moulded coal true to nature and gas outburst simulation test device, it is characterised in that: the type coal and gas prominent simulation true to nature
Experimental rig includes: bracket, cavity, cover board, stress loading system, fills gas train, reference record system and sealing；Described
Reference record system, including at least multiple stress in coal bed, deformation, temperature, the gas pressure, stream for being installed on U-type groove different location
Speed, sound emission, electromagnetic radiation and electric potential signal sensor, each sensor are connect with acquisition and recording instrument；It is each by monitoring and analyzing
The distribution and variation of monitoring parameters disclose the various index response patterns of prominent evolutionary process, including stress Evolution, crack
Evolution, temperature changing regularity, gas pressure and flow field Evolution, current potential Evolution and its correlativity, in bracket
Interior bottom is fixed with cavity, and there is cover board in upside in the cavity, is connected with stress loading system on the cover board；Have in one end of cavity
Sealing, has on the side wall of cavity and fills gas interface and each sensor installation port, and the cavity is an inner wall smooth
U-type groove, facade has an opening on front side of U-type groove length direction, drift section is simulated, in the outer installation sealing of opening and sealing sealing
Circle；U-type groove internal upper part has a cover board, is disposed with another two side elevation on rear side of U-type groove and described fills gas interface and each sensor peace
Fill mouth；Device coal body sample and gas is filled in U-type groove；Pass through the cover plate for sealing item of side edge thereof, sealing sealing ring and cavity
It is tightly connected, realizes the sealing to gas in cavity, make gas cannot be mutual by coal body periphery free space in addition to coal body seepage flow
It is logical, keep the distribution of different location gas subregion；Gas mouth sustainable supply on rear side of U-type groove is kept during prominent, simulates mine coal
Layer gas sustainable supply, the described gas train of filling includes gas gas source, pressure reducing valve, pressure and flow divider valve and gas pipe,
Gas pipe is connected to filling on gas interface in U-type groove；Gas is confessed from gas gas source, passes through pressure reducing valve decompression, pressure and stream
Amount distribution valve regulation, from the gas interface of gas pipe and different location, into cavity, coal body fills the gas of different pressures.
2. a kind of moulded coal true to nature according to claim 1 and gas outburst simulation test device, it is characterised in that: described
Cover board is the force transmitting board that a periphery has sealing strip, by selecting material, thickness and the stiffness simulation different-thickness of cover board and strong
The roof of degree, top plate is thicker, harder, and top plate is stronger to the effect of coal body, and stress in coal bed intensity is higher, power calamity
It is bigger that intensity occurs for evil.
3. a kind of moulded coal true to nature according to claim 1 and gas outburst simulation test device, it is characterised in that: described
Sealing further includes open-type and the sealing of sieve type, and open-type simulates tunnel postponing bursting and drilling, driving are induced and protruded, sieve envelope
Mouthful moment, which opens, simulates exposure coal wall driving and protrudes, and also exposed coal is prominent after analog drilling spray orifice and crossdrift gas drainage under suction.
4. a kind of moulded coal true to nature according to claim 1 and gas outburst simulation test device, it is characterized in that: described answers
Force loading system includes gusset, hydraulic cylinder, transverse slide and load bearing cross beam, and the hydraulic cylinder at least 6,
The upper end of hydraulic cylinder is connect with transverse slide, and transverse slide is connected on load bearing cross beam, and transverse slide connects
It connects in bracket, the lower end of hydraulic cylinder is connect by gusset with cover board；Stress loading system is loaded by cover board to coal body,
Release drainage-extending stress band-primitive stress band coal and rock three can be simulated with curve stress loading；By cover board to coal body or
Coal seam with gas coupling load, when coal mass relief is destroyed near front openings, by hard cover board by stress and energy to depth
Portion's transfer, extending stress band stress increase, and stress gradient increases, and enhance coal body mechanical function near coal wall, than more accurately
Simulate top plate effect.
5. a kind of moulded coal true to nature according to claim 1 and gas outburst simulation test device, it is characterized in that: the envelope
Mouth is connected by a hinge in the opening side of U-type groove, is connected with sealing sealing ring in U-type groove opening, another in the opening of U-type groove
Side is connected with the quick-opening device of sealing.
6. a kind of test method using moulded coal true to nature and gas outburst simulation test device described in claim 1, feature exist
In: moulded coal true to nature and gas outburst simulation test method:
(1) before testing, top plate type is selected first, determines cover plate materials, thickness and rigidity, is selected prominent test type, is determined
Closure types；
(2) before filling sample, first stress loading system and cover board are removed, is first sealed with hermetic type in front of U-type groove, coal sample is packed into,
Moulded coal, which need to repeatedly coaling, is compacted into molding coal sample, and raw coal need to make processing sealed around；
(3) before loading, load cover board and sample contacts are kept, then each region starts to be loaded onto given applied stress；
(4) load after the completion of, it is each fill gas mouth by setting pressure and flow be filled with gas, reach adsorption equilibrium；It needs to sieve
When net type is sealed, it should be ensured that stress and gas pressure are not enough to protrude, and slowly open hermetic type sealing, are changed to sieve type envelope
Mouthful, further according to needing increasing stress and gas pressure；
(5) it according to coal body, stress, Gas explosion burns and accordingly seals, open mode, simulate corresponding prominent test process；When not
When occurring prominent, gas pressure or stress can be continued growing, until protruding；
(6) gas filled to test coal body, after balance, rezone loading stress, and Observable simultaneously analyzes subregion gas pressure and stress
Relationship；
(7) live coal and gas prominent environment, influence factor, boundary can be simulated realistically by the variation of various underlying parameters
Condition and evolution and generating process, simulation lane side stress and gas coupling and evolutionary process, by monitoring and analyzing each prison
The distribution and variation of parameter are surveyed, the various index response patterns of prominent evolutionary process are disclosed, including stress Evolution, crack are drilled
Law, temperature changing regularity, gas pressure and flow field Evolution, current potential Evolution and its correlativity.
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