CN105422173B - The prevention and controls of coal body impact disaster in a kind of coal mining - Google Patents
The prevention and controls of coal body impact disaster in a kind of coal mining Download PDFInfo
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- CN105422173B CN105422173B CN201510855455.6A CN201510855455A CN105422173B CN 105422173 B CN105422173 B CN 105422173B CN 201510855455 A CN201510855455 A CN 201510855455A CN 105422173 B CN105422173 B CN 105422173B
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- 239000003245 coal Substances 0.000 title claims abstract description 118
- 238000005065 mining Methods 0.000 title claims abstract description 9
- 230000002265 prevention Effects 0.000 title claims abstract description 8
- 239000011435 rock Substances 0.000 claims abstract description 34
- 239000000463 material Substances 0.000 claims abstract description 24
- 230000000694 effects Effects 0.000 claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 claims abstract description 16
- 238000005553 drilling Methods 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000000428 dust Substances 0.000 claims abstract description 9
- 238000002474 experimental method Methods 0.000 claims abstract description 9
- 238000002347 injection Methods 0.000 claims abstract description 7
- 239000007924 injection Substances 0.000 claims abstract description 7
- 238000012544 monitoring process Methods 0.000 claims abstract description 7
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 2
- 238000010008 shearing Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000004880 explosion Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000006424 Flood reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of prevention and controls of coal body impact disaster in coal mining, it is concretely comprised the following steps：A, coefficient of frictional resistance is determined：Tested by laboratory stick-slip and ratio calculates the coefficient of friction for determining coal body sample and roof and floor rock sample；B, field conduct relevant parameter is determined：Determine that material requested drilling size, depth and the water and Bed for Fine Coal rock dust amount of required injection or other lubriation material amounts measure friction coefficient μ so as to reduce laboratory；C, field conduct：According to experiment and gained situation is calculated, is implemented in coal body back production Qian Liang lanes；D, validity check：It is determined that increase sliding effect and determine to be again carried out increasing sliding measure relevant parameter according to monitoring effect.When roof and floor is to press the relative adjoining rock of coal body can slide, the elasticity reduced in coal body can be gathered, so as to will effectively weaken or eliminate coal body sliding unstability or crush the odds impacted.
Description
Technical field
The present invention relates to a kind of prevention and controls of coal body impact disaster in coal mining, belong to preventing and treating bump technology neck
Domain.
Background technology
Coal industry is the basic industry in China, its health, stably, sustainable development be to be related to the weight of national energy security
Big problem.In underground coal mine, adjoining rock has huge mutual squeezing action, especially long-armed beam and masonry beam to coal seam
To the inclination squeezing action of tilting action power and upper curtate goaf breaking roof caused by back production coal body to section coal pillar, gesture
Coal seam must be made to produce the trend that relative roof and floor slides, if the coefficient of friction of coal petrography interlayer is larger, the phase in coal seam will be stopped
To sliding so that gather great number of elastic energy in coal seam.When the thrust of horizontal direction is more than the shearing strength of frictional resistance or coal body,
Unexpected the sliding unstability or impact grinding in coal seam are will result in, energy release, so as to which coal body impact accident occur, not only causes well
Lane destruction, working face burial, casualties, above ground structure destroy, and can also trigger gas, coal-dust explosion and floods, disturb
Ventilating system, serious threat the production safety in colliery.In recent years, with the continuous intensification of China's coal-mine mining depth, coal petrography
Dynamic disaster getting worse, coal body impact disaster are increasingly becomed an important factor for influenceing Safety of Coal Mine Production.From opening for colliery
From the point of view of adopting practice, coal body impact disaster quantity will gradually increase, and coal body impact disaster will be more serious.Prevent and treat the biography of coal body impact
System method mainly has the release of coal body large diameter borehole, water filling release, coal mass relief explosion and tight roof explosion are pre- in coal body
The measures such as release, these methods have certain effect, but also have more single unloading pressure means, the inadequate system of prevention and controls, effect
Fruit is not obvious enough, the shortcomings of limitation be present.
The content of the invention
In view of the above-mentioned problems of the prior art, the present invention provides a kind of preventing and treating of coal body impact disaster in coal mining
Method, by reducing the coefficient of friction between coal body and adjoining rock, coal body can be made when roof and floor is to press with respect to roof and floor
Rock stratum is slided, and the elasticity reduced in coal body can be gathered, so as to will effectively weaken or eliminate coal body sliding unstability or crush what is impacted
Odds.
To achieve these goals, the technical solution adopted by the present invention is：Coal body impact disaster in this kind of coal mining
Prevention and controls, it is concretely comprised the following steps：
A, coefficient of frictional resistance is determined：From mine back production collection in worksite coal body sample and roof and floor rock sample, pass through laboratory
Stick-slip is tested and ratio calculates the coefficient of friction for determining coal body sample and roof and floor rock sample；
B, field conduct relevant parameter is determined：Field measurement obtains the active force N of adjoining rock suffered by coal body size,
Axial stress F size and laboratory measure friction coefficient μ according to suffered by coal body, determine material requested drilling size, depth with
And the water and Bed for Fine Coal rock dust amount of required injection or other lubriation material amounts measure friction coefficient μ so as to reduce laboratory so that
F=μ N；
C, field conduct：According to experiment and calculate resulting materials drilling size, depth and required water and particulate coal petrography
Powder amount or other lubriation material amounts, implement material drilling and height between coal body and adjoining rock in coal body back production Qian Liang lanes
Pressure injection enters water and Bed for Fine Coal rock dust or other known lubriation material；
D, validity check：After above-mentioned measure is implemented, during pressing, implement monitoring coal body in the lane of back production two in Roof Breaking
Displacement (is determined) by measuring the amount of shifting near of roadway's sides, it is determined that increasing sliding effect and determining to be again carried out according to monitoring effect
Increase sliding measure relevant parameter.
Further, the supporting intensity in two lanes is strengthened while implementing to increase sliding effect in step D by increasing coal column.
Coal body slides impact principle：
On the one hand, in underground coal mine exploitation process, water is produced to coal seam under the comprehensive function of cantilever beam and masonry beam
The active force of gentle vertical both direction.As working face constantly promotes, cantilever beam length constantly increases, while it makees to coal body
Firmly also it is continuously increased.Due to frictional resistance effect between coal body and adjoining rock be present, coal seam is difficult to slide, so by
In being continuously increased for active force, the elasticity gathered in coal body can be accumulated constantly, and the thrust in final level direction is more than frictional resistance
Or the shearing strength of coal body, so as to cause coal body to slide suddenly or impact grinding, that is, back production coal body impact disaster occurs.
On the other hand, after upper curtate goaf top plate is caving, it is caving top plate and the coal column two working faces is produced laterally
Squeezing action, this active force can equally be decomposed into horizontally and vertically both direction.With being constantly caving for overlying rock, collapse
Caving plate is continuously increased to the squeezing action of coal column, and being gathered strength in coal column is continuously increased, and is rubbed when the thrust of horizontal direction is more than
The shearing strength of resistance or coal body, energy release, coal column sliding unstability or broken protrusion are wiped, so as to induce coal column impact failure.
The present invention in coal body back production Qian Liang lanes by implementing material drilling and high pressure between coal body and adjoining rock
Water and Bed for Fine Coal rock dust or other known lubriation material are injected, so as to reduce friction coefficient μ；When coefficient of frictional resistance μ is reduced
When, motive force F needed for slip relatively occurs and also decreases, therefore is easier that relative slip occurs on contact surface.So pushing up
When floor strata is to press, with adjoining rock interaction relatively can occur for coal body, will be difficult to produce elastic energy in such coal and rock
Accumulation, most effectively weaken or eliminate the odds of coal body sliding unstability or broken impact at last, realize that coal body impacts disaster
Effective preventing and treating.
Brief description of the drawings
Fig. 1 is masonry beam, long-armed beam to back production coal body effect schematic diagram.
Fig. 2 is that upper curtate is caving top plate to section coal pillar effect schematic diagram.
Fig. 3 is stick-slip experimental provision schematic diagram in the present invention.
Fig. 4 is the field conduct schematic diagram of the present invention.
In figure：1st, coal body；2nd, false roof and directly top；3rd, Lao Ding；4th, overlying rock；5th, goaf；6th, coal column；7th, tunnel；
8th, coal body sample；9th, roof and floor rock sample；10th, adjoining rock；12nd, drill.
Embodiment
The invention will be further described below.
As shown in Figures 1 to 4, it is of the invention to concretely comprise the following steps：
A, coefficient of frictional resistance is determined：From mine back production collection in worksite coal body sample 8 and roof and floor rock sample 9, pass through experiment
Room stick-slip experiment and ratio calculate the coefficient of friction for determining coal body sample 8 and roof and floor rock sample 9；Specifically by coal petrography sample by top
Plate-bottom plate-coal seam combination carries out shearing slip experiment in laboratory, sets an axial force N, applies level to coal body sample 8
Direction force F is slided until coal body sample 8, and coefficient of frictional resistance is calculated according to shear stress and vertical stress：
μ=F/N
B, field conduct relevant parameter is determined：Before underground coal mine exploitation, drilling 12 installs borehole stressmeter in coal body,
The size of the active force N of adjoining rock 10 suffered by collection coal body 1 can be implemented, according to cutting for horizontal direction suffered by the reality of coal body 1
Shearing stress F size and laboratory measure friction coefficient μ and carry out similarity simulation experiment, and setting injection material amount is contrasted, root
Material requested drilling size, depth and the water and Bed for Fine Coal rock dust amount of required injection or other profits are determined according to similarity simulation experiment
Sliding quantity of material measures friction coefficient μ so as to reduce laboratory so that
F=μ N；
C, field conduct：According to experiment and calculate resulting materials drilling size, depth and required water and particulate coal petrography
Powder amount or other lubriation material amounts, implement material drilling between coal body 1 and adjoining rock 10 in coal body back production Qian Liang lanes
And high-pressure injected water and Bed for Fine Coal rock dust or other known lubriation material；In order to ensure that injection material can fully cover contact
Face, bore diameter are typically chosen 110mm or so (equal with major diameter destressing borehole diameter).Working Face Coak intrusion contact surface
Upper drilling depth is usually set to the half of face length, the vertical lane side arrangement of drilling 12 and the both sides of coal body 1；Protect coal in tunnel
12 depth that drilled on post coal petrography contact level are usually set to the half of the width of coal column 6, and 12 vertical lane sides of drilling are arranged in currently
Stope drift active workings side；
D, validity check：After above-mentioned measure is implemented, during pressing, implement monitoring coal body in the lane of back production two in Roof Breaking
Displacement (is determined) by measuring the amount of shifting near of the 7 liang of sides in tunnel, it is determined that increasing sliding effect and being determined according to monitoring effect real again
Apply the sliding measure relevant parameter of increasing.
Further, the supporting intensity in two lanes is strengthened while implementing to increase sliding effect in step D by increasing coal column.
Claims (2)
1. the prevention and controls of coal body impact disaster in a kind of coal mining, it is characterised in that it is concretely comprised the following steps：
A, coefficient of frictional resistance is determined：From mine back production collection in worksite coal body sample (8) and roof and floor rock sample (9), pass through experiment
Room stick-slip experiment and ratio calculate the coefficient of friction for determining coal body sample (8) and roof and floor rock sample (9)；
B, field conduct relevant parameter is determined：Field measurement obtains the active force N of adjoining rock suffered by coal body (10) size,
Friction coefficient μ is measured according to axial stress F size and laboratory suffered by coal body (1), determine material requested drilling (12) size,
The water and Bed for Fine Coal rock dust amount of depth and required injection or other lubriation material amounts measure coefficient of friction so as to reduce laboratory
μ so that
F=μ N；
C, field conduct：According to experiment and calculate resulting materials drilling size, depth and required water and Bed for Fine Coal rock dust amount
Or other lubriation material amounts, implement material drilling between coal body (1) and adjoining rock (10) in coal body back production Qian Liang lanes
And high-pressure injected water and Bed for Fine Coal rock dust or other known lubriation material；
D, validity check：After above-mentioned measure is implemented, during pressing, implement monitoring coal body (1) in the lane of back production two in Roof Breaking
Displacement, it is determined that increasing sliding effect and determining to be again carried out increasing sliding measure relevant parameter according to monitoring effect.
2. the prevention and controls of coal body impact disaster in a kind of coal mining according to claim 1, it is characterised in that in step
Strengthen the supporting intensity in two lanes while implementing to increase sliding effect in rapid D by increasing coal column (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510855455.6A CN105422173B (en) | 2015-11-27 | 2015-11-27 | The prevention and controls of coal body impact disaster in a kind of coal mining |
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| CN201510855455.6A CN105422173B (en) | 2015-11-27 | 2015-11-27 | The prevention and controls of coal body impact disaster in a kind of coal mining |
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| Publication Number | Publication Date |
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| CN105422173A CN105422173A (en) | 2016-03-23 |
| CN105422173B true CN105422173B (en) | 2017-12-22 |
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| CN110306984B (en) * | 2019-07-08 | 2020-06-30 | 辽宁工程技术大学 | Coal mine roadway floor type rock burst prevention and control method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1172891A (en) * | 1996-08-06 | 1998-02-11 | 罗建民 | Integral coal mining method |
| CN102536282A (en) * | 2012-02-27 | 2012-07-04 | 西安科技大学 | Method for preventing and controlling bottom heaving disaster of mine stoping tunnel |
| CN103939099A (en) * | 2014-04-11 | 2014-07-23 | 中国矿业大学 | Method for controlling strong shock risk coal seam group rock burst |
| CN104949890A (en) * | 2015-05-26 | 2015-09-30 | 中国矿业大学 | Experimental method for simulating fault slip |
-
2015
- 2015-11-27 CN CN201510855455.6A patent/CN105422173B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1172891A (en) * | 1996-08-06 | 1998-02-11 | 罗建民 | Integral coal mining method |
| CN102536282A (en) * | 2012-02-27 | 2012-07-04 | 西安科技大学 | Method for preventing and controlling bottom heaving disaster of mine stoping tunnel |
| CN103939099A (en) * | 2014-04-11 | 2014-07-23 | 中国矿业大学 | Method for controlling strong shock risk coal seam group rock burst |
| CN104949890A (en) * | 2015-05-26 | 2015-09-30 | 中国矿业大学 | Experimental method for simulating fault slip |
Non-Patent Citations (2)
| Title |
|---|
| 冲击地压的摩擦滑动失稳机理;齐庆新等;《矿山压力与顶板管理》;19951230(第Z1期);全文 * |
| 冲击地压粘滑失稳机理的实验研究;齐庆新等;《煤炭学报》;19970425;第22卷(第2期);正文第1-2节 * |
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| CN105422173A (en) | 2016-03-23 |
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Address after: No. 1, Tongshan University Road, Xuzhou, Jiangsu Province, Jiangsu Patentee after: China University of Mining & Technology Address before: 221000 Xuzhou University Road, Jiangsu, No. 1 Patentee before: China University of Mining & Technology |
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Granted publication date: 20171222 Termination date: 20181127 |