CN110005431A - A kind of irregular gob-surrounded pillar working face Controlling of Coal Outburst method - Google Patents

A kind of irregular gob-surrounded pillar working face Controlling of Coal Outburst method Download PDF

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Publication number
CN110005431A
CN110005431A CN201910296257.9A CN201910296257A CN110005431A CN 110005431 A CN110005431 A CN 110005431A CN 201910296257 A CN201910296257 A CN 201910296257A CN 110005431 A CN110005431 A CN 110005431A
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CN
China
Prior art keywords
working
release
irregular
coal
danger zone
Prior art date
Application number
CN201910296257.9A
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Chinese (zh)
Inventor
潘立友
刘宏军
毕强
孙久政
陈理强
Original Assignee
山东科技大学
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Filing date
Publication date
Application filed by 山东科技大学 filed Critical 山东科技大学
Priority to CN201910296257.9A priority Critical patent/CN110005431A/en
Publication of CN110005431A publication Critical patent/CN110005431A/en

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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/003Linings or provisions thereon, specially adapted for traffic tunnels, e.g. with built-in cleaning devices
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/001Improving soil or rock, e.g. by freezing; Injections
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F17/00Methods or devices for use in mines or tunnels, not covered elsewhere

Abstract

The invention discloses a kind of irregular gob-surrounded pillar working face Controlling of Coal Outburst methods, it is as follows: in the return airway for irregular gob-surrounded pillar of constructing, it is arranged along low stress area cut-off, form some irregular areas, impact danger zone is determined into irregular area corresponding gob-surrounded pillar side location, using the both wings within the scope of the 30-50m of impact danger zone as risk transitional region;Before working face mining, exploited again after working face is to risk transitional region release first;When working face enters impact danger zone; the method for taking conventional drill eye blasting manufactures a wide release drainage; enable the deformation of impact danger zone in an a wide range of interior release for a long time, plays the protective effect buffered after first release, it is ensured that coal production safety.

Description

A kind of irregular gob-surrounded pillar working face Controlling of Coal Outburst method
Technical field
The invention belongs to coal mining technology fields.
Background technique
There is irregular gob-surrounded pillar, often after regular stope completes exploitation in order to as far as possible in some old coal mines of China Reclaiming coal resource needs to carry out remnants of defeated troops' exploitation to these gob-surrounded pillars.Gob-surrounded pillar especially irregular type gob-surrounded pillar is opened It adopts and presses with being often associated with damaging impact.The reason is that irregular coal column causes stress field that significant changes occur, work as working face mining Afterwards, this working face and top working face will form narrow and small coal pillar, and when pressure reaches certain numerical value, which can occur unstability, lure Send out large area bump.The prevention and control of bump are world-class problems.The bump of irregular coal pillar mining is anti-at present It controls essentially identical with the control method in routine work face, mainly takes danger releasing measures, including coal-bed flooding, strong supporting, coal seam are strong Release, disconnected top, disconnected bottom etc..These measures in the specific implementation process, due to the propulsion with working face, in advance and lateral stress Increase, especially irregular area will lead to high-level energy release, be easy to make in irregular area due to lateral traction It is concentrated at locality stress, presses possibility to increase damaging impact occurs.After this working face mining, in the larger area of coal pillar width Domain will form the high mining induced stress of superposition, gather high-level deformation energy, and the biggish impact failure of intensity occurs.When coal column is irregular When degree height, narrower width, buried depth are big, the shock hazard under working face dynamic action is higher, the routine techniques of conventional method Parameter is poor to the bump solution danger effect of irregular coal column, and is difficult to achieve the effect that clear.Therefore irregular lonely Up to the present the prevention and control of bump during the coal pillar mining of island there are no the degree fully controlled is fundamentally reached, are opened Degree of danger during adopting is larger.
Summary of the invention
For Controlling of Coal Outburst during solving the problems, such as irregular pillar face exploitation at present, the present invention proposes a kind of pre- First take the control method of stress transfer, energy dissipation.
The technical scheme is that
A kind of irregular gob-surrounded pillar working face Controlling of Coal Outburst method is as follows:
One, the arrangement and region division of return airway
In the return airway for the irregular gob-surrounded pillar of constructing, arranged along low stress area cut-off, and between goaf there are The shield lane fender of 3.0 ~ 4.0m width, and constructed according to coal seam conditions and meet production, other tunnels that ventilation needs;Working face After the completion of crossheading construction, it will form some outwardly projecting locations along goaf side and greater than the fender location of 7-8m width, Using these locations as irregular area, by irregular area corresponding gob-surrounded pillar side location, according to previous mining Practice with It impacts the example shown and carries out analogy, determine impact danger zone, it will be within the scope of the 30-50m of impact danger zone Both wings are as risk transitional region;
Two, previously fabricated not wide release drainage
Before working face mining, conventional large diameter borehole destressing method is taken risk transitional region in working face first, is manufactured One transition release drainage;The large diameter borehole that diameter is greater than 100mm, spacing of wells 1- are beaten to coal seam specifically on working face 2m, depth 5-8m, is exploited again after release;During working face mining, the impact energy of transition release drainage is released in advance It puts, enables working face smoothly close to impact danger zone;When working face enters impact danger zone, conventional jewel hole is taken The method of explosion manufactures a wide release drainage;The depth of wide release drainage is 2-3 times of transition release drainage, i.e. drilling depth 10- 25m enables the deformation of impact danger zone in an a wide range of interior release for a long time, while drilling and carrying out to wide release drainage Water filling softens coal seam, so that the coal body with burst trend is converted into weak burst trend, plays the protection buffered after first release Effect;
Three, validity check
Working face in progradation, carries out advanced validity check using traditional drilling cuttings method in impact danger zone;Exist The perforating in the lateral coal seam of coal column of diameter 42mm drill bit, eye depth 7.0-8.0m, 0 ~ 3 ° of the elevation angle, eye distance 5.0- are used in return airway 10m;When drilling cuttings method, which is examined, occurs exceeded, continue to carry out release to transition release drainage and wide release drainage, until shock hazard It completely eliminates, working face is further continued for promoting.
The positive effect of the present invention is: the principle by taking preparatory stress transfer, energy dissipation solves irregular coal Controlling of Coal Outburst problem during column working face mining, it is ensured that coal production safety.
Illustrate implementation of the invention with reference to the accompanying drawing.
Detailed description of the invention
Fig. 1 is the roadway layout and region division plan view of embodiment;Fig. 2 is that the large diameter borehole destressing method of embodiment shows It is intended to.
Specific embodiment
Those skilled in the art are according to the technical solution of summary of the invention, roadway layout shown in FIG. 1 and region division plane Figure and large diameter borehole destressing method schematic diagram shown in Fig. 2, that is, implementable, this will not be detailed here.

Claims (1)

1. a kind of irregular gob-surrounded pillar working face Controlling of Coal Outburst method, as follows:
(1) arrangement and region division of return airway
In the return airway for the irregular gob-surrounded pillar of constructing, arranged along low stress area cut-off, and between goaf there are The shield lane fender of 3.0 ~ 4.0m width, and constructed according to coal seam conditions and meet production, other tunnels that ventilation needs;Working face After the completion of crossheading construction, it will form some outwardly projecting locations along goaf side and greater than the fender location of 7-8m width, Using these locations as irregular area, by irregular area corresponding gob-surrounded pillar side location, according to previous mining Practice with It impacts the example shown and carries out analogy, determine impact danger zone, it will be within the scope of the 30-50m of impact danger zone Both wings are as risk transitional region;
(2) previously fabricated not wide release drainage
Before working face mining, conventional large diameter borehole destressing method is taken risk transitional region in working face first, is manufactured One transition release drainage;The large diameter borehole that diameter is greater than 100mm, spacing of wells 1- are beaten to coal seam specifically on working face 2m, depth 5-8m, is exploited again after release;During working face mining, the impact energy of transition release drainage is released in advance It puts, enables working face smoothly close to impact danger zone;When working face enters impact danger zone, conventional jewel hole is taken The method of explosion manufactures a wide release drainage;The depth of wide release drainage is 2-3 times of transition release drainage, i.e. drilling depth 10- 25m enables the deformation of impact danger zone in an a wide range of interior release for a long time, while drilling and carrying out to wide release drainage Water filling softens coal seam, so that the coal body with burst trend is converted into weak burst trend, plays the protection buffered after first release Effect;
(3) validity check
Working face in progradation, carries out advanced validity check using traditional drilling cuttings method in impact danger zone;Exist The perforating in the lateral coal seam of coal column of diameter 42mm drill bit, eye depth 7.0-8.0m, 0 ~ 3 ° of the elevation angle, eye distance 5.0- are used in return airway 10m;When drilling cuttings method, which is examined, occurs exceeded, continue to carry out release to transition release drainage and wide release drainage, until shock hazard It completely eliminates, working face is further continued for promoting;
The positive effect of the present invention is: the principle by taking preparatory stress transfer, energy dissipation solves irregular coal column work Make Controlling of Coal Outburst problem during the exploitation of face, it is ensured that coal production safety.
CN201910296257.9A 2019-04-13 2019-04-13 A kind of irregular gob-surrounded pillar working face Controlling of Coal Outburst method CN110005431A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910296257.9A CN110005431A (en) 2019-04-13 2019-04-13 A kind of irregular gob-surrounded pillar working face Controlling of Coal Outburst method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910296257.9A CN110005431A (en) 2019-04-13 2019-04-13 A kind of irregular gob-surrounded pillar working face Controlling of Coal Outburst method

Publications (1)

Publication Number Publication Date
CN110005431A true CN110005431A (en) 2019-07-12

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110905596A (en) * 2019-12-13 2020-03-24 山东科技大学 Hard roof type rock burst prevention and treatment method based on change of medium properties
CN110905508A (en) * 2019-12-13 2020-03-24 山东科技大学 Roadway anti-scour method for artificially manufacturing differential medium laminar flow

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1664310A (en) * 2005-02-28 2005-09-07 清华大学 Control method for coal mine detached island coal pillar rock burst
CN102296957A (en) * 2011-07-22 2011-12-28 山东科技大学 Method of transfixing and distressing with one explosion during tunneling of seam roadway with rock burst
CN104453899B (en) * 2014-11-06 2016-08-24 大同煤矿集团有限责任公司 Complex condition island working face safety coal extraction method
CN106285674A (en) * 2016-10-20 2017-01-04 山东科技大学 The method of impact soft seam tunnel with meeting head on release pressure energy
CN108386192A (en) * 2018-01-31 2018-08-10 中国矿业大学 A kind of method of active Enhanced support and active release prevention bump

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1664310A (en) * 2005-02-28 2005-09-07 清华大学 Control method for coal mine detached island coal pillar rock burst
CN102296957A (en) * 2011-07-22 2011-12-28 山东科技大学 Method of transfixing and distressing with one explosion during tunneling of seam roadway with rock burst
CN104453899B (en) * 2014-11-06 2016-08-24 大同煤矿集团有限责任公司 Complex condition island working face safety coal extraction method
CN106285674A (en) * 2016-10-20 2017-01-04 山东科技大学 The method of impact soft seam tunnel with meeting head on release pressure energy
CN108386192A (en) * 2018-01-31 2018-08-10 中国矿业大学 A kind of method of active Enhanced support and active release prevention bump

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110905596A (en) * 2019-12-13 2020-03-24 山东科技大学 Hard roof type rock burst prevention and treatment method based on change of medium properties
CN110905508A (en) * 2019-12-13 2020-03-24 山东科技大学 Roadway anti-scour method for artificially manufacturing differential medium laminar flow

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