CN106761742B - A kind of deep island working face gob side entry driving surrounding rock stability control method - Google Patents
A kind of deep island working face gob side entry driving surrounding rock stability control method Download PDFInfo
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- CN106761742B CN106761742B CN201611034588.8A CN201611034588A CN106761742B CN 106761742 B CN106761742 B CN 106761742B CN 201611034588 A CN201611034588 A CN 201611034588A CN 106761742 B CN106761742 B CN 106761742B
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- 239000011435 rock Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000003245 coal Substances 0.000 claims abstract description 63
- 238000004519 manufacturing process Methods 0.000 claims abstract description 19
- 230000000737 periodic effect Effects 0.000 claims abstract description 7
- 238000012545 processing Methods 0.000 claims abstract description 6
- 238000005553 drilling Methods 0.000 claims description 7
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 230000000505 pernicious effect Effects 0.000 claims description 4
- 230000002269 spontaneous effect Effects 0.000 claims description 4
- 238000000605 extraction Methods 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000005065 mining Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 230000009467 reduction Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Remote Sensing (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a kind of deep island working face gob side entry driving surrounding rock control methods, include the following steps: to carry out the disconnected top of presplitting before adjacent two working face extraction of island working face, make it that can not form articulated structure in face end, the hinged rock beam of key stratum is avoided to transmit Adjacent Working Face overlying strata mining induced stress to this working face；Constant resistance and large deformation anchor rod is selected in gob side entry driving support system, while increasing entity coal wall side and top plate side anchor rope length, enables anchor pole by deforming come release, anchor cable can shift country rock concentrated stress to farther entity coal wall side；Destressing borehole is arranged obliquely to the inclination of entity coal wall in the advanced 3-4 periodic weighting step pitch of island working face；Whitewashing processing is carried out in thin coal pillar side.The present invention effectively reduces deep working face stress concentration degree, reaches and reduces bracket, pillar and Support Resistance, improves the rate of extraction of coal resources, while improving the safe and efficient back production efficiency of working face, has great technology and economic benefit.
Description
Technical field
The present invention relates to deep island working face gob side entry driving country rock fields, and in particular to a kind of deep island working face edge
The lane Kong Jue surrounding rock stability control method.
Background technique
Pit mining occupies important ratio in China's coal-mine, when working face single-blade strip-type arrangement, for the ease of
Excavation replacement and the reasons such as centralized production are avoided, it is general to be adopted using jumping, to form numerous island working faces.Due to isolated island work
It is big relative to common working face stress concentration degree to make face, causes that force piece resistance is big, roadway support is difficult.Traditional area
Section coal pillar width is 30-50m, and tunnel rock deformation is big in exploitation process, directly dangerous the safe and efficient back production of working face.Mesh
Preceding edge air gallery technology reaches its maturity, which, which passes through to stay, sets the rate of extraction that thin coal pillar improves coal resources, while will dig along sky
Lane, which is arranged in surrouding rock stress, reduces region, can effectively control deformation of the surrounding rock in tunnel.But with the day of superficial part coal resources
It is beneficial exhausted, all enter the exploitation of deep resource successively both at home and abroad, pit mining reaches certain depth, and pressure rack often occurs in working face
The problems such as, roadway surrounding rock shows high-ground stress, large deformation (serious bottom distension etc.), zonal fracturing, bump, coal and gas
When the nonlinear physics phenomenon such as prominent, even if roadway surrounding rock is also difficult to control effectively, serious using gob side entry driving technology
Obstruct the safe and efficient back production of working face.
Summary of the invention
To solve the above problems, the present invention provides a kind of deep island working face gob side entry driving surrounding rock stability controlling parties
Method.Main technical measures are started with from " large and small " structure of the surrounding rock stability of gob side entry driving carries out comprehensively control, wherein big knot
Structure refers to carries out the disconnected top of presplitting before adjacent two working face extraction of island working face, and small structure refers to the support system after gob side entry driving
Middle selection constant resistance and large deformation anchor rod lengthens anchor cable, rolls tiltedly in the advanced 3-4 periodic weighting step pitch of island working face to entity coal wall
Arrangement destressing borehole downwards, finally carries out whitewashing processing to thin coal pillar side.
To achieve the above object, the technical scheme adopted by the invention is as follows:
A kind of deep island working face gob side entry driving surrounding rock control method, includes the following steps:
When first stage, back production Adjacent Working Face, close to the 3-4 period of first advance in the tunnel of island working face side
It it is tilted towards base object model at distance makes a call to a row and intensively drill, pre- brisement top is carried out using advanced concentrated stress, on Adjacent Working Face
Rock stratum carries out gob side entry driving after stablizing, identical method is used in Adjacent Working Face；
Second stage, in back production island working face, entity coal wall side can by it is appropriate deformation reach release purpose,
Require that the anchor pole in the collateral protecting system of entity coal wall is constant resistance and large deformation anchor rod at this time, entity coal wall side and top plate side anchor rope
Length increases.
Phase III: before island working face back production advanced 3-4 periodic weighting step pitch to entity coal wall direction side sideling to
Lower arrangement destressing borehole, the span length that drilling depth is 3-4 times, diameter are generally 53-75mm, are apart from roadway floor side
1m, spacing distance 2m.
Fourth stage: to prevent, adjacent goaf pernicious gas from being gushed out by thin coal pillar or gob side entry driving air enters
Adjacent goaf causes the safety problems such as spontaneous combustion of remaining coal, carries out whitewashing processing in thin coal pillar side.
The invention has the following advantages:
(1) it is answered since the 3-4 period of Adjacent Working Face first advance weakens advanced support by drilling pre- brisement top
The influence of power reduces support resistance, the Support Resistance of Adjacent Working Face, has reached the safe and efficient back production of Adjacent Working Face.
(2) island working face stress concentration degree can be effectively reduced, reduce force piece resistance in exploitation process,
Advanced support hydraulic prop intensity and supporting intensity, alleviate the amount of labour of staff, ensured bracket, pillar and
The safety of anchor pole (rope).
(3) gob side entry surrouding rock deformation can effectively be reduced, since base object model can not form articulated structure, roadway surrounding rock is answered
Power intensity reduces, and constant resistance and large deformation anchor rod can achieve the effect that release by deforming, and increasing anchor cable being capable of general
Country rock concentrated stress is shifted to entity coal wall side deeper inside, while first advance further ensures release to coal seam drilling
Effect reduces the supporting intensity in tunnel on the whole, has achieved the purpose that reduce supporting expense, it is safe and efficient to increase working face
Back production.
(4) thin coal pillar gob side entry driving is set due to using to stay, can significantly improves coal resources compared to traditional coal column
The rate of extraction, while being quickly smoothly connected convenient for working face.
It in summary it can be seen, this deep island working face gob side entry driving surrounding rock stability control method can reach " two
High two benefits that subtract two ".Effectively reduce deep working face stress concentration degree, reaches reduction bracket, pillar and supporting resistance
Power improves the rate of extraction of coal resources, improves the safe and efficient back production efficiency of working face, with certain technology and economic effect
Benefit.
Detailed description of the invention
Fig. 1 is deep island working face gob side entry driving surrounding rock stability control arrangement diagrammatic cross-section
In figure: 1- Adjacent Working Face 1；2- Adjacent Working Face 2；3- island working face；4- is close to island working face side tunnel；
5- base object model；6- intensively drills；7- thin coal pillar；8- gob side entry driving；9- gob side entry driving entity coal wall side；10- gob side entry driving bottom plate
Side；11- gob side entry driving top plate side；12- destressing borehole；13- gob side entry driving thin coal pillar side.
Specific embodiment
In order to which objects and advantages of the present invention are more clearly understood, the present invention is carried out with reference to embodiments further
It is described in detail.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to limit this hair
It is bright.
The embodiment of the invention provides a kind of deep island working face gob side entry driving surrounding rock stability control methods, including such as
Lower step:
When first stage, back production Adjacent Working Face 1, close to 3-4 week of first advance in island working face side tunnel 4
It it is tilted towards base object model 5 at phase distance makes a call to a row and intensively drill 6, pre- brisement top is carried out using advanced concentrated stress, to operated adjacent
Gob side entry driving 8 is carried out after the stability of overlying rock strata of face.Identical method is used in Adjacent Working Face 2.
Second stage, in back production island working face 3, entity coal wall side 9 can by it is appropriate deformation reach release mesh
, require that the anchor pole in 9 support system of entity coal wall side is constant resistance and large deformation anchor rod, entity coal wall side 9 and top plate side at this time
The length of 11 anchor cables increases.
Phase III: before 3 back production of island working face advanced 3-4 periodic weighting step pitch to 9 direction side of entity coal wall sideling
Arrangement destressing borehole 12 downwards, the span length that drilling depth is 3-4 times, diameter is generally 53-75mm, apart from roadway floor side
10 be 1m, spacing distance 2m.
Fourth stage: for prevent adjacent 1,2 goaf pernicious gases from gushing out by thin coal pillar or 8 air of gob side entry driving into
Enter to adjacent 1,2 goafs and cause the safety problems such as spontaneous combustion of remaining coal, carries out whitewashing processing in thin coal pillar side 13.
Specifically, including the following steps:
S1, in order to reduce Adjacent Working Face 1,2 overburden stress are transmitted to island working face 3, in back production operated adjacent
When face 1,2, only illustrates that working face (1) takes measures because the measure that island working face two sides are taken is the same, in the application, work as work
Working face 2 takes identical measure after making 1 back production of face.Close to first advance 3-4 in island working face side tunnel 4
A row is made a call to base object model 5 at periodic distance and intensively drills 6, and with the advance of the face, advanced stress will make the base object model 5 of reduction
It is caving in advance, reduces 1 support resistance of working face, while making can not shape in 3 overlying rock of working face 1 and island working face
At articulated structure, hinged rock beam is avoided to transmit 1 overlying strata mining induced stress of Adjacent Working Face to island working face 3, to operated adjacent
1 overlying rock activity of face, which stay after stablizing, sets 7 gob side entry driving 8 of thin coal pillar.
S2, surrouding rock stress reduction area is arranged in due to gob side entry driving 8,7 stress of coal column close to goaf is relative to entity
9 surrouding rock stress of coal wall side is smaller, and is influenced by island working face 3, and 9 stress concentration degrees of tunnel entity coal wall side are larger,
During 3 back production of island working face, 8 surrouding rock stress intensity of gob side entry driving tunnel will significantly increase in the advanced range of stress
Add, causes 9 deflections of entity coal wall side larger, while also increasing the deflection of roadway floor side 10.Entity coal wall side 9 can be with
Reach release purpose by deformation appropriate, requires the anchor pole in support system to have constant resistance at this time and have certain stretch
Long property, i.e. the constant resistance and large deformation anchor rod patent No. 201010196197.2, it is ensured that beyond the entirety for not influencing its supporting after deflection
Intensity.Suitably increase in entity coal wall side 9 and 11 anchor cable of top plate side, it thus can be by country rock concentrated stress to entity coal
The farther distance transfer of wall side 9, while can also effectively guarantee top plate side overlying strata combination beam mode and synchronous migration, reduce lane
Road top plate 11, entity coal wall side 9, bottom plate side deflection 10.
S3, in order to reduce the stress concentration phenomenon in the advanced range of stress of island working face 3, while before working face extraction
Advanced 3-4 periodic weighting step pitch rolls sideling arrangement destressing borehole 12 downwards, the lane that drilling depth is 3-4 times to entity coal wall 9
Road width, diameter are generally 53-75mm, are 1m, spacing distance 2m apart from roadway floor side 10, and drilling can incite somebody to action to a certain extent
Working face 3 adopts front support pressure and carries out release, and 9 concentrated stress of entity coal wall side is avoided to transmit to gob side entry bottom plate side 10, protects
Confirm body coal wall side 9,10 deflection of bottom plate side in allowed limits.
Although S4,13 deformation ranges of gob side entry driving thin coal pillar side are small, thin coal pillar is before gob side entry driving arrangement in real
Body coal wall plastic zone, thin coal pillar is sunk to squeezing by the rotation of key block B after digging lane, causes have crack in 7 coal body of thin coal pillar
Generate, for prevent adjacent goaf 1,2 pernicious gases from gushing out by thin coal pillar or 8 air of gob side entry driving enter it is adjacent mined out
Area 1,2 causes the safety problems such as spontaneous combustion of remaining coal, need to carry out whitewashing processing in thin coal pillar side 13.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the principle of the present invention, it can also make several improvements and retouch, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (1)
1. a kind of deep island working face gob side entry driving surrounding rock control method, which comprises the steps of:
When first stage, back production Adjacent Working Face (1), close to 3-4 week of the interior first advance in island working face side tunnel (4)
It it is tilted towards base object model (5) at phase distance makes a call to a row and intensively drill (6), pre- brisement top is carried out using advanced concentrated stress, to adjacent
Gob side entry driving (8) are carried out after working face stability of overlying rock strata, identical method is used in Adjacent Working Face (2)；
Second stage, in back production island working face (3), entity coal wall side (9) can by it is appropriate deformation reach release mesh
, require that the anchor pole in entity coal wall side (9) support system is constant resistance and large deformation anchor rod, entity coal wall side (9) and top at this time
The length of plate side (11) anchor cable increases；
Phase III: before island working face (3) back production advanced 3-4 periodic weighting step pitch to entity coal wall (9) direction side sideling
Arrangement destressing borehole (12) downwards, the span length that drilling depth is 3-4 times, diameter 53-75mm, apart from roadway floor side
It (10) is 1m, spacing distance 2m；
Fourth stage: goaf pernicious gas is gushed out by thin coal pillar to prevent adjacent (1,2) or gob side entry driving (8) air into
Enter to adjacent (1,2) goaf and cause spontaneous combustion of remaining coal safety problem, carries out whitewashing processing in thin coal pillar side (13).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611034588.8A CN106761742B (en) | 2016-11-23 | 2016-11-23 | A kind of deep island working face gob side entry driving surrounding rock stability control method |
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| CN201611034588.8A CN106761742B (en) | 2016-11-23 | 2016-11-23 | A kind of deep island working face gob side entry driving surrounding rock stability control method |
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| CN106761742B true CN106761742B (en) | 2019-04-16 |
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| CN112727461B (en) * | 2021-01-04 | 2023-04-18 | 天地科技股份有限公司 | Gob-side roadway mining stress superposition control method |
| CN114086957B (en) * | 2021-11-23 | 2023-05-05 | 陕西正通煤业有限责任公司 | Colliery strong impact dangerous island working face roadway outside staggered arrangement anti-impact method |
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| DE19631520C2 (en) * | 1996-08-03 | 2001-10-18 | Kavernen Bau Und Betr S Gmbh | Process and plant for the sol-technical extraction of evaporites and preparation of salt solutions |
| CN101725368B (en) * | 2009-11-28 | 2011-08-17 | 山东科技大学 | Thick seam large mining height working face gob-side entry retaining method |
| CN103321642B (en) * | 2013-05-06 | 2015-03-11 | 中国矿业大学 | Gob-side entry retaining surrounding rock stabilizing method based on lateral rock stratum pre-splitting control |
| CN104131834B (en) * | 2014-07-11 | 2016-05-11 | 华北科技学院 | A kind of stope drift active workings gob-side entry retaining method that is applicable to thin and medium seam |
| CN104533482B (en) * | 2014-10-28 | 2016-08-31 | 淮浙煤电有限责任公司顾北煤矿分公司 | A kind of reinforcement means improving gob side entry driving fender stability |
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