CN103510957A - Combined rock cross-cut coal uncovering method - Google Patents

Combined rock cross-cut coal uncovering method Download PDF

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Publication number
CN103510957A
CN103510957A CN201310465569.0A CN201310465569A CN103510957A CN 103510957 A CN103510957 A CN 103510957A CN 201310465569 A CN201310465569 A CN 201310465569A CN 103510957 A CN103510957 A CN 103510957A
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China
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coal
boring
crossdrift
uncovering
drill holes
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CN201310465569.0A
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Chinese (zh)
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CN103510957B (en
Inventor
林柏泉
李贺
杨威
高亚斌
王迪
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中国矿业大学
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Abstract

The invention discloses a combined rock cross-cut coal uncovering method which is particularly suitable for quick rock cross-cut coal uncovering of outburst dangerous coal seams in underground coal mines. When a cross cut is tunneled to be at a vertical distance of 10 m from coal seams, a drill site is directly constructed in the cross cut; the coal seams are constructed and holes are drilled in the drill site; the drill holes are arranged at intervals by slotting drill holes and general drill holes; the uniform pressure relief of coal bodies is realized through the combined arrangement of the slotting drill holes and the general drill holes. After the drilling operation is finished, pipes are connected for extraction and drainage to reduce the gas content and the gas potential in the coal seams. After the gas extraction is qualified, the slotting drill holes are used as slurry injecting drill holes to inject cement mortar in the coal bodies for strengthening the coal bodies, so that the combination of slotting pressure relief and reinforcement is realized. Under the condition of guaranteeing safe coal uncovering, through the adoption of the method, the outburst removing engineering amount can be reduced by 30-40%, the gas extraction time and the coal uncovering period can be shortened, and the safe coal uncovering speed is increased by 40-50%.

Description

A kind of combined type crossdrift method for uncovering coal

Technical field

The present invention relates to a kind of combined type crossdrift method for uncovering coal, especially a kind of method for uncovering coal safely and fast that is applicable to dangerous seam with potential under coal mine.

Background technology

Coal and Gas Outburst (hereinafter to be referred as outstanding) are that under coal mine, coal seam with gas is thrown to suddenly a kind of dynamic phenomenon in digging space in the short time at the utmost point, one of disaster the most serious in coal production, large, dangerous high outstanding often the occurring in stone door punching coal process of intensity.Generally believe that at present outstanding is the result of geostatic stress, gas pressure and the comprehensive function of coal petrography intensity, Chinese scholars is from outstanding mechanism, many stone door punching coal anti-burst methods are proposed: in coal seam release, mainly contain the measures such as hydraulic flushing in hole, loosening blasting and hydraulic slotted liner technique aspect anti-reflection, aspect coal body reinforcing, mainly containing the measures such as metallic framework and grouting and reinforcing, these measures have obtained certain effect in protrusion-dispelling work, but also have significant limitation.The measures such as hydraulic slotted liner technique are removal geostatic stress and gas pressure effectively, but has destroyed coal body integrality simultaneously, and coal petrography bulk strength reduces; Grouting and reinforcing can effectively improve coal mass strength, but cement mortar can only spread in crack, and fracture opening is little, and diffusion radius is limited, and on-way resistance is large, grouting pressure high (> 10MPa), increased sealing of hole difficulty and operation dangerous.Therefore,, in the urgent need to a kind of coal uncovering method is provided, be intended to realize the anti-reflection combination with reinforcing strengthening of release.

Summary of the invention

Technical problem: the object of the invention is to overcome the deficiency in prior art, a kind of coal uncovering method is provided, by slot, holes and arrange with the combination of common boring, increased the effective influence basin of boring, thereby it is anti-reflection to have realized the even release in coal seam, has significantly shortened the gas pre-drainage time.

Technical scheme: combined type crossdrift method for uncovering coal of the present invention, comprises the steps:

A, when cross cutting Zhi Yu coal seam is hung down apart from 10m, at the crossdrift drill site of constructing of meeting head on;

B, by the webbed a plurality of boring of structure of alternately constructing of drill site Nei Xiang coal seam, within boring border L is controlled at the scope that enters the outer 12m of coal seam crossdrift 5 outline lines, slot boring and common boring spacing distance a arrangement are pressed in a plurality of boring;

After c, slot boring complete with common drilling construction, hole sealing tube is installed and is carried out sealing of hole, the gas then hole sealing tube being connected in gas pumping pipe network ,Dui coal seam is taken out in advance;

After d, gas pumping are up to standard, using slot boring injected water cement mortar strengthening coal body in inlet well ,Xiang coal seam, realize slot release and the combination of reinforcing strengthening;

E, after cement mortar is solidified, crossdrift continues driving, and enters top board 2m through coal seam, completes exposed coal work.

The diameter of described slot boring is 94mm, and the diameter of common boring is 75mm; The hole sealing tube employing diameter of described slot boring is the seamless steel pipe of 1 cun; Described is 4~4.5m apart from a.

Beneficial effect: the present invention is holed and arranged with the combination of common boring by slot, has increased the effective influence basin of boring, has realized the even release in coal seam anti-reflection, has significantly shortened the gas pre-drainage time.By injected water cement mortar strengthening coal body in slot boring, realized slot release and the combination of reinforcing strengthening, from reducing geostatic stress and gas pressure, raising coal mass strength three aspects:, consider, eliminated stone door punching coal outburst hazard comprehensively.Use the method, can effectively reduce by 30%~40% extinction engineering quantity, safe exposed coal speed improves 40%~50%, has extensive practicality.

Accompanying drawing explanation

Fig. 1 is the structural representation of a kind of combined type crossdrift method for uncovering coal of the present invention.

Fig. 2 is the A-A sectional drawing of Fig. 1.

Fig. 3 is the B-B sectional drawing of Fig. 2.

In figure: 1-coal seam, the common boring of 2-, the boring of 3-slot, 4-drill site, 5-crossdrift.

The specific embodiment

Below in conjunction with the embodiment in accompanying drawing, the invention will be further described:

As shown in Figure 1, Figure 2 and Figure 3, a kind of combined type crossdrift method for uncovering coal of the present invention, comprise the steps: that crossdrift 5 is according to conventional method enforcement Bian Tan limit pick, according to the parameters such as orientation, data Tan Qing coal seam, geology hole, inclination angle and thickness of construction, for stone door punching coal work lays the foundation; When crossdrift 5, meet head on to hang down when for 10m with coal seam 1, stop driving, at crossdrift 5 drill site 4 of meeting head on to construct, drill site 4 sizes, depending on rig model, after drill site 4 has been constructed, are allocated and transported rig to drill site 4, shown in Fig. 3, by the webbed a plurality of boring of structure of alternately constructing of drill site 4 Nei Xiang coal seams 1.Within boring border L is controlled at the scope that enters the outer 12m of coal seam crossdrift 5 outline lines, a plurality of boring is that 4~4.5m arranges by slot boring 3 and common boring 2 spacing distance a, slot boring 3 is carried out slot operation after having constructed, the diameter of described slot boring 3 is 94mm, and the diameter of common boring 2 is 75mm; After drilling construction completes, hole sealing tube is installed and is carried out sealing of hole, for guaranteeing smooth slip casting of later stage, the unified employing of the hole sealing tube diameter of slot boring 3 is the seamless steel pipe of 1 cun, the gas after sealing of hole, the hole sealing tube of slot boring 3 and common boring 2 being connected in gas pumping pipe network ,Dui coal seam 1 is taken out in advance.After gas pumping is up to standard, using slot boring 3 as inlet well, remove the extraction pipeline of slot boring 3, by slot hole 3 hole sealing tube to coal seam 1 interior injected water cement mortar strengthening coal body, the hole diffusion that cement mortar forms along slot is until be full of hole, when grouting pressure raises suddenly and there is no obvious reduction trend, stop slip casting, realize slot release and the combination of reinforcing strengthening; After cement mortar is solidified, crossdrift 5 continues driving, and enters top board 2m through coal seam 1, completes exposed coal work.

Claims (4)

1. a combined type crossdrift method for uncovering coal, is characterized in that, comprises the steps:
A, when crossdrift (5) driving Zhi Yu coal seam (1) is hung down apart from 10m, at crossdrift (5) drill site (4) of meeting head on to construct;
B, by drill site (4) Nei Xiang coal seam (1) the webbed a plurality of boring of structure of alternately constructing, within boring border (L) is controlled at the scope that enters the outer 12m of coal seam crossdrift 5 outline lines, slot boring (3) is pressed in a plurality of boring and common boring (2) spacing distance a arranges;
C, slot boring (3) are installed hole sealing tube and carry out sealing of hole after having constructed with common boring (2), and the gas then hole sealing tube being connected in gas pumping pipe network ,Dui coal seam (1) is taken out in advance;
After d, gas pumping are up to standard, using slot boring (3) as inlet well ,Xiang coal seam (1) interior injected water cement mortar strengthening coal body, realize slot release and reinforce the combination of strengthening;
E, after cement mortar is solidified, crossdrift (5) continues driving, and enters top board 2m through coal seam (1), completes exposed coal work.
2. a kind of combined type crossdrift method for uncovering coal according to claim 1, is characterized in that: the diameter of described slot boring (3) is 94mm, and the diameter of common boring (2) is 75mm.
3. a kind of combined type crossdrift method for uncovering coal according to claim 1, is characterized in that: the hole sealing tube employing diameter of described slot boring (3) is the seamless steel pipe of 1 cun.
4. a kind of combined type crossdrift method for uncovering coal according to claim 1, is characterized in that: described is 4~4.5m apart from a.
CN201310465569.0A 2013-10-08 2013-10-08 A kind of combined type coal uncovering method CN103510957B (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103940568A (en) * 2014-04-11 2014-07-23 中国矿业大学 Method for detecting pressure relief blasting effect of hard roof
CN104213921A (en) * 2014-08-07 2014-12-17 中国矿业大学 Freezing-type stone door cross-measure coal uncovering method based on hydraulic seam cutting
CN104594850A (en) * 2014-12-19 2015-05-06 陈进 Cement mortar hole sealing method of new coal mine
CN106321142A (en) * 2016-11-01 2017-01-11 中国矿业大学 Rock cross-cut coal uncovering method combining microwave-assisted extraction with grouting reinforcement
CN107605484A (en) * 2017-08-28 2018-01-19 中国矿业大学 A kind of liquid nitrogen freezing formula coal uncovering method
CN108590739A (en) * 2018-04-11 2018-09-28 中国平煤神马能源化工集团有限责任公司 A kind of prominent tunnel regionality energy divides source to control anti-burst method
CN109162755A (en) * 2018-09-11 2019-01-08 中国矿业大学 A kind of coal uncovering method that electric pulse is combined with grouting and reinforcing

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CN102678167A (en) * 2012-06-11 2012-09-19 中国矿业大学 Hydraulic-fracturing rock cross-cut coal uncovering method for short-distance coal beds
CN102900460A (en) * 2012-11-06 2013-01-30 中国矿业大学 Method for performing through-going seam cutting, pressure relief, permeability enhancement and quick tunneling on soft and high-outburst coal seam
CN103195467A (en) * 2013-04-02 2013-07-10 重庆市能源投资集团科技有限责任公司 Hydraulic fracturing and grouting solidification combined rock cross-cut coal uncovering method

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103940568A (en) * 2014-04-11 2014-07-23 中国矿业大学 Method for detecting pressure relief blasting effect of hard roof
CN103940568B (en) * 2014-04-11 2016-08-17 中国矿业大学 A kind of method detecting tight roof relieving shot effect
CN104213921A (en) * 2014-08-07 2014-12-17 中国矿业大学 Freezing-type stone door cross-measure coal uncovering method based on hydraulic seam cutting
CN104594850A (en) * 2014-12-19 2015-05-06 陈进 Cement mortar hole sealing method of new coal mine
CN106321142A (en) * 2016-11-01 2017-01-11 中国矿业大学 Rock cross-cut coal uncovering method combining microwave-assisted extraction with grouting reinforcement
CN107605484A (en) * 2017-08-28 2018-01-19 中国矿业大学 A kind of liquid nitrogen freezing formula coal uncovering method
CN108590739A (en) * 2018-04-11 2018-09-28 中国平煤神马能源化工集团有限责任公司 A kind of prominent tunnel regionality energy divides source to control anti-burst method
CN109162755A (en) * 2018-09-11 2019-01-08 中国矿业大学 A kind of coal uncovering method that electric pulse is combined with grouting and reinforcing

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