CN103439460A - Triaxial coal and gas multi-outbursting test pressure-relief method - Google Patents
Triaxial coal and gas multi-outbursting test pressure-relief method Download PDFInfo
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- CN103439460A CN103439460A CN2013103752250A CN201310375225A CN103439460A CN 103439460 A CN103439460 A CN 103439460A CN 2013103752250 A CN2013103752250 A CN 2013103752250A CN 201310375225 A CN201310375225 A CN 201310375225A CN 103439460 A CN103439460 A CN 103439460A
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Abstract
The invention discloses a triaxial coal and gas multi-outbursting test pressure-relief method, including the following steps: (1) arranging a first pressure chamber on the top of a main pressure chamber, and arranging a second pressure chamber on the top of the first pressure chamber; (2) starting a data control and acquisition system to monitor changes of temperatures and gas pressure in the first pressure chamber and the second pressure chamber; (3) filling gas into the first pressure chamber and the second pressure chamber; (4) piercing a sealing aluminum sheet in the main pressure chamber by a piercing tool in the first pressure chamber to generate first outbursting to achieve quick pressure relief; (5) piercing a sealing aluminum sheet in the first pressure chamber by a piercing tool in the second pressure chamber to generate second outbursting to achieve quick pressure relief, and monitoring and acquiring test data in real time. The test pressure-relief method can adopt raw coal with different sizes to perform coal and gas outbursting tests in a triaxial stress state so as to comprehensively and scientifically research a coal and gas outbursting mechanism.
Description
Technical field
The present invention relates to a kind of coal and gas burst experiment method, particularly relate to repeatedly outstanding test pressure releasing method of a kind of three axle coals and gas.
Background technology
Coal and Gas Outburst are a kind of extremely complicated dynamic phenomenons under coal mine, and it is seriously threatening Safety of Coal Mine Production, affects the performance of coal production ability.At driving face, coal and gas particularly often occur in the stone door punching coal process delay outstandingly, it is coal and the Gas Outburst of inherent explosion of a period of time or operation place generation after explosion or operation.Steeply pitching seam etc. after outstanding generation for the first time, also once occurred secondary outstanding or even three times outstanding.According to incompletely statistics; a few percent that number of times accounts for total outstanding number of times occurs to delay to give prominence in the whole nation; although proportion is little; but, because " extension ", this class is outstanding often exceeds the unexpected of people, the outstanding defer time of delaying; without certain rule; short a few minutes, long tens hours, even several days; In the outstanding scale removal process also often occurred in after giving prominence to for the first time of secondary; If when outstanding, just in time run into workplace have the people carry out operation or outstanding to last time after cleared up, personnel can not withdraw in time, very harmful to the miner caused great casualties and property loss, mine safety production in serious threat.Mechanism and form that coal and Gas Outburst occur are complicated, along with increase and the mining conditions of the coal mining degree of depth are day by day complicated, the generation of coal and Gas Outburst also is difficult to prediction more, at present, Chinese scholars makes certain gains to the mechanism research of coal and Gas Outburst, but most achievements are all the hypothesis that field statistics data and laboratory study propose.These hypothesis all can only be described certain a part of phenomenon of coal and Gas Outburst, can't form the complete Principle System of quantification.Utilize existing hypothesis to predict very large difficulty to coal and Gas Outburst, and accuracy is not high, this has just brought huge hidden danger to mine safety production.
At present, mainly there is following problem in the device that carries out coal and gas burst experiment: the test specimen that (1) adopts mostly is moulded coal, although moulded coal has similarity with raw coal to a certain extent, still there is larger difference in both, and certain limitation is arranged in the research to coal and gas outburst mechanism; (2) part moulded coal sample dimensions is larger, and the test preparatory period is longer; (3) device is installed comparatively complicated; (4) device can only produce once and give prominence to, and can not reflect really underground coal and Gas Outburst phenomenon; (5) the aspis opening speed is slower, has affected to a certain extent the time of coal and Gas Outburst, can not approach field condition.
Summary of the invention
For above shortcomings in prior art, the invention provides repeatedly outstanding test pressure releasing method of a kind of three axle coals and gas.This test pressure releasing method can reach the effect of quick pressure releasing, and can produce the repeatedly phenomenon of outstanding or coal and gas delay outburst of coal and gas, thus to the mechanism of coal and Gas Outburst generation carry out more comprehensively, more scientific research.
In order to solve the problems of the technologies described above, the present invention has adopted following technical scheme:
Three axle coals and gas is outstanding test pressure releasing method repeatedly, in this test pressure releasing method, has adopted pressure chamber and pressure chamber for the first time for the second time;
Described pressure chamber for the first time and for the second time pressure chamber include pressure chamber's sleeve, spring lock shotpin, puncture cutter, energy-storaging spring seat, energy-storaging spring, top cover, sealing aluminium flake and sealing plug; Be laid with at least two through holes on the circumference of described pressure chamber sleeve, be provided with a spring lock shotpin put in pressure chamber's sleeve in each through hole, described spring lock shotpin and through hole slide and are sealed and matched; Described energy-storaging spring seat is hollow structure, the energy-storaging spring seat is located in pressure chamber's sleeve and is slidably matched with the inwall of pressure chamber's sleeve, described top cover is hollow structure the top that is arranged on pressure chamber's sleeve, top cover coordinates with pressure chamber's sleeve seal, one side pressure of described energy-storaging spring is on the energy-storaging spring seat, the other end of energy-storaging spring is pressed on top cover, and described energy-storaging spring seat is pressed on the spring lock shotpin; The described cutter that punctures is hollow structure, punctures the below, middle part that cutter is arranged on the energy-storaging spring seat; Described sealing aluminium flake is arranged in the hollow hole of top cover, and sealing plug screws in the hollow hole of top cover and is pressed on the sealing aluminium flake, and the sealing aluminium flake coordinates with the hollow hole inner wall sealing of top cover;
This test pressure releasing method comprises the steps:
1) will be for the first time pressure chamber be arranged on the top of main pressure chamber, pressure chamber's sleeve of pressure chamber is for the first time coordinated with the top seal of the confined pressure chamber upper cover of main pressure chamber, puncture the sealing aluminium flake in bit alignment main pressure chamber in pressure chamber for the first time; Pressure chamber is arranged on the top of pressure chamber for the first time for the second time, and pressure chamber's sleeve of pressure chamber is for the second time coordinated with the top seal of pressure chamber's sleeve of pressure chamber for the first time, punctures the bit alignment sealing aluminium flake in pressure chamber for the first time in pressure chamber for the second time;
2) log-on data is controlled and acquisition system, monitors pressure chamber for the first time and the temperature in pressure chamber and the variation of gaseous tension for the second time, and it is gathered;
3) to pressure chamber for the first time be filled with methane gas in pressure chamber for the second time;
4) after everything in readiness, spring lock shotpin in pressure chamber is for the first time shifted out in pressure chamber's sleeve, the energy-storaging spring seat of pressure chamber moves down for the first time, and the cutter that punctures in pressure chamber punctures the sealing aluminium flake in main pressure chamber for the first time, produces once the outstanding quick pressure releasing that reaches;
5) the spring lock shotpin in pressure chamber is for the second time shifted out in pressure chamber's sleeve, the energy-storaging spring seat of pressure chamber moves down for the second time, and the cutter that punctures in pressure chamber punctures the sealing aluminium flake in pressure chamber for the first time for the second time, produces the outstanding quick pressure releasing that reaches of secondary; In whole experimentation, each data of test are carried out to Real-Time Monitoring and collection.
Compared with prior art, three axle coals of the present invention and gas repeatedly outstanding test pressure releasing method there is following advantage:
1, this test pressure releasing method can reach the effect of quick pressure releasing, and can produce the repeatedly phenomenon of outstanding or coal and gas delay outburst of coal and gas, thus to the mechanism of coal and Gas Outburst generation carry out more comprehensively, more scientific research.
2, this test pressure releasing method can be monitored gas pressure and the temperature variations of former coal body after giving prominence to, to reach the target of being familiar with coal and Gas Outburst mechanism under the various factors effect; In test, can adopt raw coal to be tested, result more tallies with the actual situation, and can better disclose the effect of various factors.
3, this test pressure releasing method can be realized repeatedly giving prominence to and the outstanding test of delaying, and for this class is special and the extent of injury is large outstanding situation, prevents from providing basis.Bring out in various degree outstanding by the pressure differential of regulating each pressure chamber.Can be familiar with the destruction of outstanding process to coal body, provide support for soft layering in coal seam and outstanding coal study on the genesis; Degree of impairment for coal body under outstanding role and the research of micro-damage state provide basis.So that the mechanism that more scientific Study on Coal and Gas Outburst produce, form science, perfect theory, for being provided fundamental basis in colliery by the control of coal and Gas Outburst.
The accompanying drawing explanation
The cross section view that Fig. 1 is time pressure chamber;
The vertical view that Fig. 2 is time pressure chamber;
Fig. 3 for pressure chamber for the first time and for the second time pressure chamber be arranged on the structural representation in main pressure chamber.
In accompanying drawing: 1-pressure chamber sleeve; 2-spring lock shotpin; 3-puncture cutter; 4-energy-storaging spring seat; 5-energy-storaging spring; 6-top cover; 7-sealing aluminium flake; 8-sealing plug; 9-for the first time pressure chambers; 10-for the second time pressure chambers; 11-main pressure chamber; 12-confined pressure chamber upper cover; 13-sealing aluminium flake; 14-screw; 15-O-ring seal; 16-tractive magnet; 17-tooth bar; 18-orienting sleeve; 19-tooth bar reset components; 20-gear and cam mechanism; 21-guard shield; 22-guard shield lock-screw; 23-back-moving spring; 24-lock pin O-ring seal.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Three axle coals and gas is outstanding test pressure releasing method repeatedly, has adopted pressure chamber 9 and pressure chamber 10 for the first time for the second time in this test pressure releasing method.
For the first time pressure chamber 9 and for the second time pressure chamber 10 include pressure chamber's sleeve 1, spring lock shotpin 2, puncture cutter 3, energy-storaging spring seat 4, energy-storaging spring 5, top cover 6, sealing aluminium flake 7, sealing plug 8 and lock pin driving mechanism.Be laid with at least two through holes on the circumference of pressure chamber's sleeve 1 (in the present embodiment, be laid with three through holes on the circumference of pressure chamber's sleeve 1), be provided with a spring lock shotpin 2 put in pressure chamber's sleeve 1 in each through hole, spring lock shotpin 2 is sealed and matched by lock pin O-ring seal 24 and through-hole wall, and spring lock shotpin 2 also can slide in through hole.Energy-storaging spring seat 4 is hollow structure, energy-storaging spring seat 4 is located in pressure chamber's sleeve 1 and is slidably matched with the inwall of pressure chamber's sleeve 1, top cover 6 is hollow structure the top that is arranged on pressure chamber's sleeve 1 by screw 14, top cover 6 is sealed and matched with pressure chamber's sleeve 1, one side pressure of energy-storaging spring 5 is on energy-storaging spring seat 4, the other end of energy-storaging spring 5 is pressed on top cover 6, and energy-storaging spring seat 4 is pressed on spring lock shotpin 2.Puncture cutter 3 for hollow structure, puncture the below, middle part that cutter 3 is arranged on energy-storaging spring seat 4, in the present embodiment, puncture cutter 3 for hollow tube, one end of hollow tube is connected to the below, middle part of energy-storaging spring seat 4 by ring flange, the other end of hollow tube is pyramidal structure.Sealing aluminium flake 7 is arranged in the hollow hole of top cover 6, and sealing plug 8 screws in the hollow hole of top cover 6 and is pressed on sealing aluminium flake 7, and sealing aluminium flake 7 coordinates with the hollow hole inner wall sealing of top cover 6 by O-ring seal 15.
The lock pin driving mechanism comprises tractive magnet 16, tooth bar 17, orienting sleeve 18, tooth bar reset components 19, gear and cam mechanism 20, guard shield 21 and guard shield lock-screw 22.Tooth bar 17 is respectively equipped with an orienting sleeve 18 near two ends, tooth bar 17 is slidably matched with orienting sleeve 18, one end of tooth bar 17 arranges tractive magnet 16, and this tractive magnet 16 is for driving tooth bar 17 to slide on orienting sleeve 18, at the other end of tooth bar 17, tooth bar reset components 19 is set.Wheel and rack 17 tooth engagements on gear and cam mechanism 20, cam slidably contacts with spring lock shotpin 2, in the process of rotating at cam, cam can promote spring lock shotpin 2 to the interior movement of pressure chamber's sleeve 1, after cam disengages spring lock shotpin 2, under the effect of back-moving spring 23, spring lock shotpin 2 outwards moves.At gear and the outer guard shield 21 that arranges of cam mechanism 20, between guard shield 21, by guard shield lock-screw 22, connect.
This three axles coal and gas repeatedly outstanding test pressure releasing method comprise the steps:
1) will be for the first time pressure chamber 9 be arranged on the top of main pressure chamber 11, pressure chamber's sleeve 1 of pressure chamber 9 is for the first time coordinated with the top seal of the confined pressure chamber upper cover 12 of main pressure chamber 11, and the cutter 3 of puncturing in pressure chamber 9 is aimed at the sealing aluminium flake 13 in main pressure chamber 11 for the first time; Pressure chamber 10 is arranged on the top of pressure chamber 9 for the first time for the second time, make for the second time the 10 of pressure chamber pressure chamber sleeve 1 coordinate with the top seal of pressure chamber's sleeve 1 of pressure chamber 9 for the first time, the cutter 3 that punctures in pressure chamber 10 is aimed at the sealing aluminium flake 7 in pressure chamber 9 for the first time for the second time.
2) log-on data is controlled and acquisition system, monitors pressure chamber 9 for the first time and the interior temperature in pressure chamber 10 and the variation of gaseous tension for the second time, and it is gathered.
3) to pressure chamber 9 for the first time be filled with methane gas in pressure chamber 10 for the second time.
4) after everything in readiness, spring lock shotpin 2 in pressure chamber 9 is for the first time shifted out in pressure chamber's sleeve 1, the energy-storaging spring seat 4 of pressure chamber 9 moves down for the first time, the cutter 3 that punctures in pressure chamber 9 punctures the sealing aluminium flake 13 in main pressure chamber 11 for the first time, produces once the outstanding quick pressure releasing that reaches.
5) the spring lock shotpin 2 in pressure chamber 10 is for the second time shifted out in pressure chamber's sleeve 1, the energy-storaging spring seat 4 of pressure chamber 10 moves down for the second time, the cutter 3 that punctures in pressure chamber 10 punctures the interior sealing aluminium flake 13 in pressure chamber 9 for the first time for the second time, produces the outstanding quick pressure releasing that reaches of secondary; In whole experimentation, each data of test are carried out to Real-Time Monitoring and collection.
Finally explanation is, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although with reference to preferred embodiment, the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not breaking away from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (1)
1. three axle coals and gas are repeatedly given prominence to the test pressure releasing method, it is characterized in that, have adopted pressure chamber (9) and pressure chamber (10) for the first time for the second time in this test pressure releasing method;
Described pressure chamber for the first time (9) and for the second time pressure chamber (10) include pressure chamber's sleeve (1), spring lock shotpin (2), puncture cutter (3), energy-storaging spring seat (4), energy-storaging spring (5), top cover (6), sealing aluminium flake (7) and sealing plug (8); Be laid with at least two through holes on the circumference of described pressure chamber sleeve (1), be provided with a spring lock shotpin (2) put in pressure chamber's sleeve (1) in each through hole, described spring lock shotpin (2) slides and is sealed and matched with through hole; Described energy-storaging spring seat (4) is hollow structure, energy-storaging spring seat (4) is located in pressure chamber's sleeve (1) and is slidably matched with the inwall of pressure chamber's sleeve (1), described top cover (6) is hollow structure the top that is arranged on pressure chamber's sleeve (1), top cover (6) is sealed and matched with pressure chamber's sleeve (1), one side pressure of described energy-storaging spring (5) is on energy-storaging spring seat (4), it is upper that the other end of energy-storaging spring (5) is pressed in top cover (6), and described energy-storaging spring seat (4) is pressed on spring lock shotpin (2); The described cutter (3) that punctures is hollow structure, punctures the below, middle part that cutter (3) is arranged on energy-storaging spring seat (4); Described sealing aluminium flake (7) is arranged in the hollow hole of top cover (6), and sealing plug (8) screws in the hollow hole of top cover (6) and is pressed in sealing aluminium flake (7) above, and sealing aluminium flake (7) coordinates with the hollow hole inner wall sealing of top cover (6);
This test pressure releasing method comprises the steps:
1) will be for the first time pressure chamber (9) be arranged on the top of main pressure chamber (11), pressure chamber's sleeve (1) of pressure chamber (9) is for the first time coordinated with the top seal of the confined pressure chamber upper cover (12) of main pressure chamber (11), and the cutter (3) that punctures on pressure chamber (9) is aimed at the sealing aluminium flake (13) in main pressure chamber (11) for the first time; Pressure chamber (10) are arranged on the top of pressure chamber (9) for the first time for the second time, pressure chamber's sleeve (1) of pressure chamber (10) is for the second time coordinated with the top seal of pressure chamber's sleeve (1) of pressure chamber (9) for the first time, and the cutter (3) that punctures on pressure chamber (10) is aimed at the sealing aluminium flake (7) on pressure chamber (9) for the first time for the second time;
2) log-on data is controlled and acquisition system, monitors pressure chamber (9) for the first time and pressure chamber (10) interior temperature and the variation of gaseous tension for the second time, and it is gathered;
3) to pressure chamber (9) for the first time be filled with methane gas in pressure chamber (10) for the second time;
4) after everything in readiness, spring lock shotpin (2) on pressure chamber (9) is for the first time shifted out in pressure chamber's sleeve (1), the energy-storaging spring seat (4) of pressure chamber (9) moves down for the first time, the cutter (3) that punctures in pressure chamber (9) punctures the sealing aluminium flake (13) in main pressure chamber (11) for the first time, produces once the outstanding quick pressure releasing that reaches;
5) the spring lock shotpin (2) on pressure chamber (10) is for the second time shifted out in pressure chamber's sleeve (1), the energy-storaging spring seat (4) of pressure chamber (10) moves down for the second time, the cutter (3) that punctures in pressure chamber (10) punctures pressure chamber (9) interior sealing aluminium flake (13) for the first time for the second time, produces the outstanding quick pressure releasing that reaches of secondary; In whole experimentation, each data of test are carried out to Real-Time Monitoring and collection.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105891440A (en) * | 2016-04-11 | 2016-08-24 | 辽宁工程技术大学 | Coal and gas outburst testing device with supplemental gas source and method |
| CN113049772A (en) * | 2021-03-22 | 2021-06-29 | 南通市飞宇石油科技开发有限公司 | Continuous triaxial coal and gas outburst simulation experiment device |
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| CN101806792A (en) * | 2010-04-15 | 2010-08-18 | 中国科学院力学研究所 | Coal and gas outburst simulation test device and protection device thereof |
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2013
- 2013-08-26 CN CN201310375225.0A patent/CN103439460B/en not_active Expired - Fee Related
Patent Citations (3)
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Cited By (3)
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|---|---|---|---|---|
| CN105891440A (en) * | 2016-04-11 | 2016-08-24 | 辽宁工程技术大学 | Coal and gas outburst testing device with supplemental gas source and method |
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| CN113049772A (en) * | 2021-03-22 | 2021-06-29 | 南通市飞宇石油科技开发有限公司 | Continuous triaxial coal and gas outburst simulation experiment device |
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