CN104569338A - Device and method for measuring coal and gas outburst tendency - Google Patents
Device and method for measuring coal and gas outburst tendency Download PDFInfo
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- CN104569338A CN104569338A CN201510002507.5A CN201510002507A CN104569338A CN 104569338 A CN104569338 A CN 104569338A CN 201510002507 A CN201510002507 A CN 201510002507A CN 104569338 A CN104569338 A CN 104569338A
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Abstract
The invention discloses a device and method for measuring coal and gas outburst tendency. The device comprises a closed seal bin, wherein a pressure gage and an air inlet are arranged at the upper part of the closed seal bin; an air release hole and a pressure sensor are arranged on the left side wall of the closed seal bin; a pressure relief hole is formed in the right side wall of the closed seal bin; a hole fixing brake for plugging the pressure relief hole is arranged at the pressure relief hole; a coal sample accommodating hole and a seal cover matched with the coal sample accommodating hole are arranged at the bottom of the closed seal bin. The method comprises the following steps: coal sample particles are put in the seal bin and the seal bin is filled with gas through an injection hole to enable a coal sample to fully adsorb the gas; when the expression of the pressure gage on the seal bin is stable and does not change, a handle is quickly opened to suddenly release pressure of the seal bin, then, the coal sample is taken out and the broken situation of the coal sample is observed; if the coal sample is broken, the coal sample has the outburst danger under the present pressure. The method can more intuitively reflect whether a coal bed has the outburst tendency or not and is higher in accuracy.
Description
Technical field
The present invention relates to a kind of coal and gas prominent tendentiousness determinator and method, be applicable to the outstanding tendentious mensuration in the coal seam of different condition mine.
Background technology
Coal and gas prominent is a kind of geology dynamic phenomenon of complexity, interrelated between its each outstanding factor, is one of major casualty causing down-hole accident, carries out to coal and gas prominent the generation predicting the accident that can effectively prevent disasters.Point out clearly in " control coal and gas prominent regulation ", judge that the projecting coal bed single index critical value identified gas pressure used is as relative gas pressure, this critical value is 0.74MPa, namely as differentiating that coal seam is with or without outstanding tendentious gas pressure critical value.But this unified critical methane pressure force value is not suitable for the actual conditions in each mining area, effectively cannot instructs safety in production and find danger sensitively.So " control coal and gas prominent regulation " also points out that each ore deposit according to this ore deposit environment, will measure the critical pressure value in this ore deposit.But, also do not have good method can measure the outstanding critical methane pressure force value in coal seam, colliery at present.
Summary of the invention
Technical matters: the object of this invention is to provide simple, intuitive and reliable can the measuring coal seam whether there is outstanding tendentious device and method of a kind of method.
Technical scheme: coal and gas prominent tendentiousness determinator of the present invention, comprise the close encapsulation storehouse be located on support, the top in close encapsulation storehouse is provided with tensimeter and air admission hole, the left side wall in close encapsulation storehouse is provided with bleeder port and pressure transducer, the right side wall in close encapsulation storehouse has a pressure relief vent, pressure relief vent place is provided with the Gu Kongzha of shutoff pressure relief vent, the handle that Gu Kongzha comprises lock arm, is located at the fastening screw plug on lock arm and snaps together with lock arm, the bottom in close encapsulation storehouse has dress and gets coal sample hole and get with dress the gland bonnet matched in coal sample hole.
Before and after described close encapsulation storehouse, two side is made for having an X-rayed sheet material.
Use the coal and gas prominent tendentiousness assay method of said apparatus, comprise the following steps:
A. the soft stratified seam sample in coal seam is obtained at the scene, and filler test coal sample particle;
B. the coal sample particle of 10-100 grain is loaded in gas-tight silo, close encapsulation storehouse;
C. in gas-tight silo, inject methane gas by injecting hole, make the abundant adsorption gas of coal sample;
D. the tensimeter registration on storehouse to be sealed stablize constant after, gas pressure is labeled as P, opens handle fast and makes the unexpected release of gas-tight silo, take out coal sample afterwards, observes the broken situation of coal sample;
If fracture phenomena does not occur coal sample, then think that the coal seam at coal sample place does not have outstanding tendentiousness at this pressure;
If coal sample generation Fragmentation Phenomena, then think that the coal seam at coal sample place has outstanding tendentiousness at this pressure.
The particle diameter of described test coal sample is 1mm ~ 50mm.
Described gas pressure P is the actual maximum gas pressure recorded in coal seam, coal sample place.
Beneficial effect: owing to can produce a large amount of fine coal after coal and gas prominent generation, these fine coal are considered to coal seam and there occurs physical explosion under high pressure gas effect.If do not have the generation of coal dust, gas release rate will be suppressed, and gas is difficult to start to continue to give prominence to.Therefore, whether coal dust can be there is the index that physical explosion is used as coal and gas prominent danger forecasting under specific gas pressure.The present invention can test the coal sample of the mine coal seam of varying environment and condition, measure coal seam Location is actual record maximum gas pressure condition under whether there is outstanding tendentiousness, compared with this critical value of 0.74MPa specified with " preventing and treating coal and gas prominent to specify ", more intuitively can react coal seam and whether there is outstanding tendentiousness, and accuracy is higher.Step is simple, easily and effectively.Therefore, for effectively solving the problem, research and develop a kind of coal and gas prominent tendentiousness determinator and method, physical explosion experiment is carried out to different mine coal sample, measure the outstanding critical methane pressure force value in coal seam according to its broken situation, and the outstanding tendentiousness in coal seam can be measured.
Accompanying drawing explanation
Fig. 1 is the structural representation of coal and gas prominent tendentiousness determinator of the present invention.
Fig. 2 is the present invention solid hole brake structure schematic diagram.
In figure: 1-tensimeter; 2-injecting hole; 3-bleeder port; 4-pressure transducer; 5-pressure relief vent; 6 lock arms; The fastening screw plug of 7-; 8-handle; 9-gland bonnet; 10-support; 11-pressure meter switch; 12-gas-tight silo.
Embodiment
Below in conjunction with accompanying drawing, one embodiment of the present of invention are further described:
Coal and gas prominent tendentiousness determinator of the present invention, comprise the close encapsulation storehouse 12 of establishing over the mount 10, the top in close encapsulation storehouse 12 is provided with tensimeter 1 and air admission hole 2, the left side wall in close encapsulation storehouse 12 is provided with bleeder port 3 and pressure transducer 4, the right side wall in close encapsulation storehouse 12 has a pressure relief vent 5, before and after described close encapsulation storehouse 12, two side is made for having an X-rayed sheet material.Pressure relief vent 5 place is provided with the Gu Kongzha of shutoff pressure relief vent, the handle 8 that Gu Kongzha comprises lock arm 6, is located at the fastening screw plug 7 on lock arm 6 and snaps together with lock arm 6, the bottom in close encapsulation storehouse 12 has dress and gets coal sample hole and get with dress the gland bonnet 9 matched in coal sample hole.
Coal and gas prominent tendentiousness assay method of the present invention, concrete steps are as follows:
A. obtain the soft stratified seam sample in coal seam at the scene, and screen the test coal sample of certain granules; The particle diameter of described test coal sample is 1mm ~ 50mm.
B. open gland bonnet 9, the coal sample particle of 10-100 grain is loaded in gas-tight silo 12, builds gland bonnet 9, close encapsulation storehouse 12;
C. pressure meter switch 11 is opened, in gas-tight silo 12, methane gas is injected by injecting hole 2, gas injection pressure is 1.5 times of the highest virgin pressure in coal seam, coal sample place, coal sample is after adsorption equilibrium, finely tuned by bleeder port 3 pairs of container inner pressures, make final adsorption equilibrium pressure equal the original top pressure in coal seam, coal sample place.
D. tensimeter 1 registration on storehouse 12 to be sealed stablize constant after, closing presure table switch 11, handle 8 is opened fast with safety hammer, lock arm 6 drives fastening screw plug 7 to unclamp the shutoff removed pressure relief vent 5, the gases at high pressure of internal tank are rushed out by pressure relief vent 5, make gas-tight silo 12 suddenly release, pressure transducer 4 by pressure signal transmission to signal picker, the process of gas pressure transient sudden change in real time record pressurized capsule;
E. for preventing test coal sample from spraying from pressure relief vent 5, one condom can be set in exit, open gland bonnet 9 afterwards and take out coal sample, observing the broken situation of coal sample;
If fracture phenomena does not occur coal sample, then think that the coal seam at coal sample place does not have outstanding tendentiousness at this pressure;
If coal sample generation Fragmentation Phenomena, then think that the coal seam at coal sample place has outstanding tendentiousness at this pressure.
Claims (5)
1. a coal and gas prominent tendentiousness determinator, it is characterized in that: it comprises the close encapsulation storehouse (12) be located on support (10), the top in close encapsulation storehouse (12) is provided with tensimeter (1) and air admission hole (2), the left side wall in close encapsulation storehouse (12) is provided with bleeder port (3) and pressure transducer (4), the right side wall in close encapsulation storehouse (12) has a pressure relief vent (5), pressure relief vent (5) place is provided with the Gu Kongzha of shutoff pressure relief vent, Gu Kongzha comprises lock arm (6), the handle (8) being located at the fastening screw plug (7) on lock arm (6) and snapping together with lock arm (6), the bottom in close encapsulation storehouse (12) has dress and gets coal sample hole and get with dress the gland bonnet (9) matched in coal sample hole.
2. want the coal and gas prominent tendentiousness determinator described in 1 according to right, it is characterized in that: before and after described close encapsulation storehouse (12), two side is made for having an X-rayed sheet material.
3. use a coal and gas prominent tendentiousness assay method for device described in claim 1, it is characterized in that comprising the following steps:
A. the soft stratified seam sample in coal seam is obtained at the scene, and filler test coal sample particle;
B. the coal sample particle of 10-100 grain is loaded in gas-tight silo (12), close encapsulation storehouse (12);
C. in gas-tight silo (12), inject methane gas by injecting hole (2), make the abundant adsorption gas of coal sample;
D. tensimeter (1) registration on storehouse to be sealed (12) stablize constant after, gas pressure is labeled as P, opens handle (8) fast and makes gas-tight silo (12) suddenly release, take out coal sample afterwards, observe the broken situation of coal sample;
If fracture phenomena does not occur coal sample, then think that the coal seam at coal sample place does not have outstanding tendentiousness at this pressure;
If coal sample generation Fragmentation Phenomena, then think that the coal seam at coal sample place has outstanding tendentiousness at this pressure.
4. a kind of coal and gas prominent tendentiousness assay method according to claim 3, is characterized in that: the particle diameter of described test coal sample is 1mm ~ 50mm.
5. a kind of coal and gas prominent tendentiousness assay method according to claim 3, is characterized in that: described gas pressure P is the actual maximum gas pressure recorded in coal seam, coal sample place.
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| CN201510002507.5A CN104569338B (en) | 2015-01-05 | 2015-01-05 | A kind of coal and gas prominent tendentiousness determines device and method |
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| CN201510002507.5A CN104569338B (en) | 2015-01-05 | 2015-01-05 | A kind of coal and gas prominent tendentiousness determines device and method |
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| CN104569338B CN104569338B (en) | 2017-06-09 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105865929A (en) * | 2016-03-30 | 2016-08-17 | 中国科学院力学研究所 | Rock material fracture characteristic test system and method thereof |
| CN110850054A (en) * | 2019-12-04 | 2020-02-28 | 河南工程学院 | Coal and gas outburst simulation device |
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| CN102353608A (en) * | 2011-07-08 | 2012-02-15 | 中国矿业大学 | Device and method for measuring prediction index critical value of coal and gas outburst |
| CN103884822A (en) * | 2014-04-15 | 2014-06-25 | 西安科技大学 | Coal and gas outburst simulation system and method |
| CN204374196U (en) * | 2015-01-05 | 2015-06-03 | 中国矿业大学 | A kind of coal and gas prominent tendentiousness determinator |
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2015
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| CN2038582U (en) * | 1988-10-12 | 1989-05-31 | 江苏省扬中县机械仪表厂 | One-way valve with flow monitoring function |
| CN102353608A (en) * | 2011-07-08 | 2012-02-15 | 中国矿业大学 | Device and method for measuring prediction index critical value of coal and gas outburst |
| CN103884822A (en) * | 2014-04-15 | 2014-06-25 | 西安科技大学 | Coal and gas outburst simulation system and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105865929A (en) * | 2016-03-30 | 2016-08-17 | 中国科学院力学研究所 | Rock material fracture characteristic test system and method thereof |
| CN105865929B (en) * | 2016-03-30 | 2019-01-04 | 中国科学院力学研究所 | A kind of rock type materials cracking properties pilot system and method |
| CN110850054A (en) * | 2019-12-04 | 2020-02-28 | 河南工程学院 | Coal and gas outburst simulation device |
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