CN1664310A - Control method for coal mine detached island coal pillar rock burst - Google Patents

Control method for coal mine detached island coal pillar rock burst Download PDF

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Publication number
CN1664310A
CN1664310A CN 200510011363 CN200510011363A CN1664310A CN 1664310 A CN1664310 A CN 1664310A CN 200510011363 CN200510011363 CN 200510011363 CN 200510011363 A CN200510011363 A CN 200510011363A CN 1664310 A CN1664310 A CN 1664310A
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CN
China
Prior art keywords
coal
hole
rib
blasting
rice
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Application number
CN 200510011363
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Chinese (zh)
Inventor
潘立友
杨慧珠
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清华大学
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Application filed by 清华大学 filed Critical 清华大学
Priority to CN 200510011363 priority Critical patent/CN1664310A/en
Publication of CN1664310A publication Critical patent/CN1664310A/en

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Abstract

The invention discloses a coal mine isolated island coal column impacting ground pressure controlling method that includes laneway collocation, demolishing pressure relief, the reinforcing of superficial of the up and down slots laneway, altering the deep physical of the laneway. The advantage is decreasing the impact fatalness, increasing the intensity of the gas, and enhancing the protection function for workers in the laneway.

Description

Control method for coal mine detached island coal pillar rock burst

Technical field

The invention belongs to the coal mining technical field.

Background technology

The control problem of bump is the difficult problem that world-class coal mining will solve, and especially the isolated island coal pillar mining usually follows damaging impact ground to press.The method of preventing and treating of the control of the bump of isolated island coal pillar mining and routine work face is basic identical at present, mainly in recovery process, takes to separate the danger measure in the high pressure stress district, comprises measures such as drilling and blasting release, boring release, top board explosion, base plate processing.These measures are in specific implementation process, owing to follow pushing to adopt of work plane, very dangerous between implementation period, the degree of separating danger is insufficient, causes stress raisers easily, and safety guarantee is not sure.Narrower when coal pillar width, when buried depth is big, when implementing drilling and blasting and boring release, creep into just very difficultly, it is relatively poor to separate the danger effect; Implement the coal-bed flooding method and be difficult to realize creeping into of water injecting drilling equally.Therefore controlling to of the bump of isolated island coal pillar mining also fundamentally do not reach the degree of control fully so far, and the degree of danger of its exploitation is bigger.

Goal of the invention

The objective of the invention is great deficiency, propose a kind of new bump control method at the local solution danger that exists in the present isolated island coal pillar mining bump control.

Technical scheme of the present invention is:

1, roadway arrangement

At first arrange coal cutting roadway in the low stress area of isolated island coal column, coal cutting roadway comprises other tunnels that crossheading, following crossheading and work plane are cut eye and satisfied production ventilation needs, leaves the wide coal column of 3.0-4.0 rice between coal cutting roadway and the goaf.

2, in-place blasting out release

Bore the unloading pressure by blasting hole every 3.0-4.0 rice on upper and lower crossheading rib, the aperture is generally 42 millimeters, and hole depth is coal seam thickness or span length 3 times, and the aperture is arranged in apart from base plate 1.0-1.3 rice is convenient to operation, and the boring direction elevation angle is generally 0-3 °; Bore pilot hole between per two holes, unloading pressure by blasting hole, pilot hole can be the large diameter hole greater than 100 millimeters, also can be arranged to 2-3 the small diameter bore identical with the unloading pressure by blasting bore dia; Load explosive and detonator then in the unloading pressure by blasting hole, shot depth is about 40% of a drilling depth, stops up with stemming, and line detonates, and the quick-fried pine of coal body, produces the crack between the Kong Yukong, realizes inner release.

3, upper and lower gate road helps the body superficial part to reinforce

A kind of scheme is: under the harder complete situation of upper and lower crossheading rib, rib spraying cement mortar is sealed, form the mortar spray-up, jetting thickness 5-10 centimetre.

Another kind of scheme is: help at upper and lower gate road under the situation of body soft broken, on rib, bore the chemical grouting hole, pitch-row 2.0-4.0 rice, hole depth 1.5-3.0 rice, Grouting Pipe slip casting in the hole is inserted in the boring back, injecting paste material is an organic polymer, and group's body is carried out chemosetting, makes rib form the chemical consolidation confining zone of 1.0-1.5 rice

4, to tunnel group body deep physical modification

After treating that tunnel group body superficial part is reinforced, on the rib of reinforcing, bore the physics injected hole, aperture, pitch-row are identical with the chemical grouting hole, also can in former chemical grouting hole, continue to creep into, brill is 3 times of lanewidth deeply, boring back slip casting in the coal body of in-place blasting out, injecting paste material is water glass-cement mixing slurries commonly used, has changed the mechanical property in group body deep after the slip casting.

Good effect of the present invention is: 1. reinforce and the deep physical modification by tunnel coal body superficial part, and unloading pressure by blasting, changed the mechanical property in coal body deep, made that having the coal body that impacts tendency is converted into weak impact tendency or impacts tendency, fundamentally reduces shock hazard.From rib to the deep modified zone, the intensity of coal body improves, and plays restriction to crushing of deep coal is bad, thereby coal mine detached island coal pillar rock burst is effectively controlled.

Description of drawings

Fig. 1 is the top plan view that roadway arrangement, unloading pressure by blasting hole are arranged, Fig. 2 is that coal body is reinforced schematic diagram, and Fig. 3 is that the rib of another embodiment is reinforced schematic diagram.

Among the figure: the last crossheading of 1-, 2-exploiting field coal column, the 3-pilot hole, the 4-work plane is cut eye, 5-goaf, 6-unloading pressure by blasting hole, crossheading under the 7-, 8-chemical grouting hole, 9-chemical consolidation confining zone, 10-physical modification district, 11-physics injected hole, 12-spray-up.

The specific embodiment

With certain coal seam thickness is that 2 meters colliery isolated island coal column is an example, compresses into row control with taking following method impact.

As shown in Figure 1:

One, go up crossheading 1, crossheading 7 down along the coal seam direction developing of coal column, cut eye 4 along the coal seam tendency development works face of coal column, what 3-4 rice was left in above-mentioned tunnel and goaf 5 adopts sky coal column 2, and by the requirement of safety of coal mines supporting is carried out in above-mentioned tunnel.

Two, in upper and lower crossheading apart from the unloading pressure by blasting hole 6 of 42 millimeters of the height drill diameters of 1.0 meters of base plates, 6 meters of the spacings of wells, 6 meters of drilling depths, between unloading pressure by blasting hole 6, bore pilot hole 3 again, pilot hole 3 adopts the large diameter hole of 110 millimeters of diameters, and hole depth is 7 meters, filling explosive cartridge in the unloading pressure by blasting hole 6,2.5 meters of shot depths, the double detonator parallel connection of big gun head, after the stemming obstruction, connect outside the hole once detonation or segmentation are detonated, with the quick-fried pine of coal body, removal pressure.

As shown in Figure 2:

Three, in upper and lower crossheading, be drilled in 42 millimeters of drill diameters on the rib, dark 1 meter chemical grouting hole 8 with electric detonation, 2 meters of jewel hole spacings, plug pvc pipe after the boring and annotate chemical grout to lane group superficial part, chemical grout is selected " the beautiful diffusing N of horse " for use, and lane group is formed greater than 1 meter dark chemical consolidation confining zone 9;

Four,,, inject water glass-cement grout to coal body by this hole as physics injected hole 11 in the position, hole in above-mentioned chemical grouting hole 8 or keep and continue in the intact hole to bore deeply to 6 meters.

After injecting slurries, slurries are enclosed in the coal body, make the slip casting zone form physical modification district 10 by chemical consolidation confining zone 9.

After above-mentioned steps is finished, can carry out actual mining, bump is controlled in the back production.

Fig. 3 is that the rib of another embodiment is reinforced schematic diagram, different is under the harder complete situation of upper and lower crossheading rib with Fig. 2, no longer bore injected hole and carry out chemical grouting, but rib spraying cement mortar is sealed, form spray-up 12, jetting thickness 5-10 centimetre, other step is identical with Fig. 1, Fig. 2.

Claims (3)

1, a kind of control method for coal mine detached island coal pillar rock burst, it at first arranges coal cutting roadway in the low stress area of isolated island coal column, coal cutting roadway comprises other tunnels that crossheading, following crossheading and work plane are cut eye and satisfied production ventilation needs, leaves the wide coal column of 3.0-4.0 rice between coal cutting roadway and the goaf; It is characterized in that may further comprise the steps:
(1) in-place blasting out release
On upper and lower crossheading rib, bore the unloading pressure by blasting hole every 3.0-4.0 rice, the aperture is generally 42 millimeters, hole depth is coal seam thickness or span length 3 times, the aperture be arranged in be convenient to operate apart from base plate 1.0-1.3 rice, the boring direction elevation angle is generally 0-3 °, between per two holes, unloading pressure by blasting hole, bore pilot hole, in the unloading pressure by blasting hole, load explosive and detonator then, shot depth is about 40% of a drilling depth, stop up with stemming, line detonates, the quick-fried pine of coal body, produce the crack between the Kong Yukong, realize inner release;
(2) upper and lower gate road helps the body superficial part to reinforce
Under the harder complete situation of upper and lower crossheading rib, rib spraying cement mortar is sealed, form the mortar spray-up, jetting thickness 5-10 centimetre;
Help at upper and lower gate road under the situation of body soft broken, on rib, bore the chemical grouting hole, pitch-row 2.0-4.0 rice, hole depth 1.5-3.0 rice, Grouting Pipe slip casting in the hole is inserted in the boring back, injecting paste material is an organic polymer, and group's body is carried out chemosetting, makes rib form the chemical consolidation confining zone of 1.0-1.5 rice;
(3) to tunnel group body deep physical modification
After treating that tunnel group body superficial part is reinforced, on the rib of reinforcing, bore the physics injected hole, aperture, pitch-row are identical with the chemical grouting hole, also can in former chemical grouting hole, continue to creep into, brill is 3 times of lanewidth deeply, boring back slip casting in the coal body of in-place blasting out, injecting paste material is water glass-cement mixing slurries commonly used.
2, control method for coal mine detached island coal pillar rock burst as claimed in claim 1 is characterized in that, the pilot hole in step 1 is the large diameter hole greater than 100 millimeters.
3, control method for coal mine detached island coal pillar rock burst as claimed in claim 1 is characterized in that, the pilot hole in step 1 is the small diameter bore identical with the unloading pressure by blasting bore dia of 10 centimetres of 2-3 spacings.
CN 200510011363 2005-02-28 2005-02-28 Control method for coal mine detached island coal pillar rock burst CN1664310A (en)

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CN1804374B (en) * 2006-01-06 2010-12-01 山东科技大学 Method for preventing and controlling impact geopressure in longwall face gate of coal mine
CN101936162A (en) * 2010-04-16 2011-01-05 兖州煤业股份有限公司 Method for preventing rock burst of bottom plate of layered tunnel in tectonic stress region of coal mine
CN102296958A (en) * 2011-07-22 2011-12-28 山东科技大学 Method for preventing rock burst by artificial space defect body
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
CN102322262A (en) * 2011-09-12 2012-01-18 山东科技大学 Colliery isolated island coal column crossheading bump control method
CN102383728A (en) * 2011-09-12 2012-03-21 山东科技大学 Coal mine rockburst defect segmentation and control method
CN101713290B (en) * 2009-12-10 2012-04-18 天地科技股份有限公司 Method for clearing rock burst of full-mine laneway deep in mine
CN102425416A (en) * 2011-09-12 2012-04-25 山东科技大学 Coal mine high stress area roadway driving face impact ground pressure control method
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RU2451180C1 (en) * 2010-11-22 2012-05-20 Государственное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный горный институт имени Г.В. Плеханова (технический университет)" Method of roof advanced attachment at pillar extraction between workings filled with concrete
CN102518471A (en) * 2011-11-14 2012-06-27 山东科技大学 Rock burst energy releasing method of roadway of high stress area in coal mine
CN102603240A (en) * 2012-03-23 2012-07-25 中南大学 Dynamic load-resistant rock pillar strengthening method
CN102635327A (en) * 2012-04-01 2012-08-15 天地科技股份有限公司 Grouting method and system of cracked coal rock mass
CN102787843A (en) * 2012-08-07 2012-11-21 新汶矿业集团有限责任公司协庄煤矿 Dirt band-containing coal seam working surface mining process
CN101762830B (en) * 2009-09-29 2013-01-02 中国矿业大学 Distributed coal mine rock burst monitoring method
CN103061766A (en) * 2013-01-11 2013-04-24 河南理工大学 Method for preventing and controlling coalbed rockburst through chemical reaction
CN103233738A (en) * 2013-04-27 2013-08-07 西安科技大学 Comprehensive weakening method of top coal of heavy-pitch super high seam
CN104005765A (en) * 2014-04-29 2014-08-27 中国矿业大学 Stereo type prevention and control method for hard roof rock burst
CN104453899A (en) * 2014-11-06 2015-03-25 大同煤矿集团有限责任公司 Safety recovery method of island working surface under complicated condition
CN104453944A (en) * 2014-12-29 2015-03-25 山东科技大学 Coal-pillar-impacting-preventing roadway protecting method
CN104533452A (en) * 2014-12-05 2015-04-22 中国矿业大学 Sectional type grouting reinforcement method for underground coal mine fragmentized coal bodies
CN104632218A (en) * 2014-12-11 2015-05-20 安徽理工大学 Water injection reinforcing method for extremely-soft and low-moisture-content coal body working surface
CN104832198A (en) * 2015-03-13 2015-08-12 中煤科工集团重庆研究院有限公司 Roadway surrounding rock deformation, rock burst and coal and gas outburst comprehensive treatment method
CN105156110A (en) * 2015-07-03 2015-12-16 陕西煤业化工技术研究院有限责任公司 Dynamic disaster mine district roadway structure and method for developing same
CN105350965A (en) * 2015-11-27 2016-02-24 西安科技大学 Rock burst control method for coal mining tunnel
CN105569699A (en) * 2015-12-22 2016-05-11 大同煤矿集团有限责任公司 Inclined shaft development support technology for isolated coal pillar
CN105909246A (en) * 2016-06-30 2016-08-31 太原理工大学 Horizontal segment blast cracking and chemical weakening method for igneous rock in thick coal seam
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
CN106401587A (en) * 2016-10-20 2017-02-15 山东科技大学 Method for preventing and treating bottom sliding type rock burst
CN106437711A (en) * 2016-10-20 2017-02-22 山东科技大学 Coal seam impact type mine earthquake prevention and control method
CN107013214A (en) * 2017-05-12 2017-08-04 中国矿业大学(北京) A kind of solution danger method of bump
CN108661642A (en) * 2018-04-23 2018-10-16 北京科技大学 A kind of method of the nearly upright Bumping Pressure in Coal Layers of depth hole relieving shot prevention
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CN1804374B (en) * 2006-01-06 2010-12-01 山东科技大学 Method for preventing and controlling impact geopressure in longwall face gate of coal mine
CN101762830B (en) * 2009-09-29 2013-01-02 中国矿业大学 Distributed coal mine rock burst monitoring method
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