CN103510957B - A kind of combined type coal uncovering method - Google Patents
A kind of combined type coal uncovering method Download PDFInfo
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- CN103510957B CN103510957B CN201310465569.0A CN201310465569A CN103510957B CN 103510957 B CN103510957 B CN 103510957B CN 201310465569 A CN201310465569 A CN 201310465569A CN 103510957 B CN103510957 B CN 103510957B
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- 239000003245 coal Substances 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000011083 cement mortar Substances 0.000 claims abstract description 11
- 238000010276 construction Methods 0.000 claims abstract description 11
- 238000005086 pumping Methods 0.000 claims abstract description 8
- 238000004080 punching Methods 0.000 claims abstract description 6
- 239000004575 stone Substances 0.000 claims abstract description 6
- 238000005728 strengthening Methods 0.000 claims abstract description 5
- 238000005553 drilling Methods 0.000 claims abstract description 4
- 238000000605 extraction Methods 0.000 claims abstract description 3
- 238000007789 sealing Methods 0.000 claims description 17
- 238000007569 slipcasting Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000008033 biological extinction Effects 0.000 abstract description 2
- 238000005520 cutting process Methods 0.000 abstract description 2
- 230000003014 reinforcing effect Effects 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000010339 dilation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
A kind of combined type coal uncovering method, is particularly useful for the quick stone door punching coal of underground coal mine dangerous seam with potential.When cross cutting is to when hanging down apart from 10m with coal seam, to meet head on drill site of constructing in crossdrift, by drill site to coal seam construction drill, holing is spaced by slot boring and common boring, and it is anti-reflection that the combination layout of slot boring and common boring achieves the even release of coal body.Connecting leg extraction after drilling construction completes, reduces the gas bearing capacity in coal seam and gas potential.After gas pumping is up to standard, using slot boring as inlet well, in coal body, inject cement mortar strengthening coal body, realize slot release and reinforce the combination strengthened.The present invention, under the condition guaranteeing safe coal-openning, can reduce by the extinction engineering quantity of 30% ~ 40%, significantly shortens gas pumping time and exposed coal cycle, and safe coal-openning speed improves 40% ~ 50%.
Description
Technical field
The present invention relates to a kind of combined type coal uncovering method, especially a kind of method for uncovering coal being safely and fast applicable to underground coal mine dangerous seam with potential.
Background technology
Coal and gas prominent (hereinafter referred to as outstanding) is a kind of dynamic phenomenon that underground coal mine coal seam with gas throws to suddenly digging space in very short time, be one of disaster the most serious in coal production, intensity is large, dangerously high outstandingly often to occur in stone door punching coal process.Generally believe that outstanding is the result of geostatic stress, gas pressure and the comprehensive function of coal petrography intensity at present, Chinese scholars is from outstanding mechanism, many stone door punching coal anti-burst methods are proposed: in coal seam pressure relief is anti-reflection, mainly contain the measures such as hydraulic flushing in hole, loosening blasting and hydraulic slotted liner technique, the measure such as metallic framework and grouting and reinforcing is mainly contained in coal body reinforcing, these measures achieve certain effect in outburst prevention work, but also there is significant limitation.The measures such as hydraulic slotted liner technique can effectively removably stress and gas pressure, but destroys coal body integrality simultaneously, and coal petrography bulk strength reduces; Grouting and reinforcing effectively can improve coal mass strength, but cement mortar can only spread in crack, and fracture opening is little, and dilation angle is limited, and on-way resistance is large, grouting pressure high (>10MPa), increases sealing of hole difficulty and operation danger.Therefore, in the urgent need to providing a kind of coal uncovering method, be intended to realize the anti-reflection combination strengthened with reinforcing of release.
Summary of the invention
Technical problem: the object of the invention is the deficiency overcome in prior art, a kind of coal uncovering method is provided, is arranged with the combination of common boring by slot boring, increase the effective influence basin of boring, thus it is anti-reflection to achieve the even release in coal seam, significantly shorten the gas pre-drainage time.
Technical scheme: combined type coal uncovering method of the present invention, comprises the steps:
A, when cross cutting to coal seam hang down apart from 10m time, crossdrift meet head on construct drill site;
B, by the alternately webbed multiple boring of construction structure to coal seam in drill site, boring border L controls within the scope entering the outer 12m of coal seam crossdrift 5 outline line, and slot boring is pressed in multiple boring and common boring spacing distance a arranges;
After the boring of c, slot completes with common drilling construction, hole sealing tube be installed and carry out sealing of hole, then hole sealing tube being connected to gas pumping pipe network, the gas in coal seam is taken out in advance;
After d, gas pumping are up to standard, using slot boring as inlet well, in coal seam, inject cement mortar strengthening coal body, realize slot release and reinforce the combination strengthened;
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 distance a is 4 ~ 4.5m.
Beneficial effect: the present invention is arranged with the combination of common boring by slot boring, increases the effective influence basin of boring, achieves the even release in coal seam anti-reflection, significantly shorten the gas pre-drainage time.By injecting cement mortar strengthening coal body in slot boring, achieving slot release and reinforcing the combination strengthened, considering from reduction geostatic stress and gas pressure, raising coal mass strength three aspect, eliminate stone door punching coal outburst hazard comprehensively.Use the method, effectively can reduce by the extinction engineering quantity of 30% ~ 40%, safe coal-openning speed improves 40% ~ 50%, has extensive practicality.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of combined type coal uncovering method 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-, 3-slot is holed, 4-drill site, 5-crossdrift.
Detailed description of the invention
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 coal uncovering method of the present invention, comprise the steps: that crossdrift 5 conventionally implements the pick of spy limit, limit, the geology hole data according to construction visits the parameters such as orientation, clear coal seam, inclination angle and thickness, for stone door punching coal work lays the foundation; When crossdrift 5 meets head on to hang down apart from during for 10m with coal seam 1, stop driving, to meet head on drill site 4 of constructing in crossdrift 5, rig, depending on rig model, after drill site 4 has been constructed, has been allocated and transported to drill site 4 by drill site 4 size, shown in Fig. 3, by the alternately webbed multiple boring of construction structure to coal seam 1 in drill site 4.Boring border L controls within the scope entering the outer 12m of coal seam crossdrift 5 outline line, multiple boring is 4 ~ 4.5m arrangement by slot boring 3 and common boring 2 spacing distance a, slot boring 3 carries 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 carries out sealing of hole, for ensureing later stage smooth slip casting, the hole sealing tube unified employing diameter of slot boring 3 is the seamless steel pipe of 1 cun, after sealing of hole, the hole sealing tube of slot boring 3 and common boring 2 is connected to gas pumping pipe network, the gas in 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, in coal seam 1, cement mortar strengthening coal body is injected by the hole sealing tube of slot boring 3, the hole that cement mortar is formed along slot spreads until be full of hole, when grouting pressure raises suddenly and significantly do not reduce trend, stop slip casting, realize slot release and reinforce the combination strengthened; After cement mortar is solidified, crossdrift 5 continues driving, and enters top board 2m through coal seam 1, completes exposed coal work.
Claims (1)
1. a combined type coal uncovering method, the geology hole data according to construction visits orientation, clear coal seam, inclination angle and thickness parameter, for stone door punching coal work lays the foundation; It is characterized in that, comprise the steps:
A, when crossdrift (5) driving to coal seam (1) hang down apart from 10m time, stop driving, crossdrift (5) meet head on construction drill site (4), drill site (4) size is depending on rig model;
B, after drill site (4) has been constructed, by rig allocation and transportation to drill site (4), the webbed multiple boring of construction structure is replaced to coal seam (1) by drill site (4), boring border (L) controls within the scope entering the outer 12m of coal seam crossdrift (5) outline line, and slot boring (3) and common boring (2) spacing distance are pressed in multiple boring
ait is 4 ~ 4.5m arrangement; The diameter of described slot boring (3) is 94mm, and the diameter of common boring (2) is 75mm;
After c, drilling construction complete, hole sealing tube is installed and carries out sealing of hole, for ensureing later stage smooth slip casting, the hole sealing tube employing diameter of slot boring (3) is the seamless steel pipe of 1 cun, after sealing of hole, the hole sealing tube of slot boring (3) and common boring (2) is connected to gas pumping pipe network, the gas in coal seam (1) is taken out in advance;
After d, gas pumping are up to standard, using slot boring (3) as inlet well, remove the extraction pipeline of slot boring (3), in coal seam (1), cement mortar strengthening coal body is injected by the hole sealing tube of slot boring (3), the hole that cement mortar is formed along slot spreads until be full of hole, when grouting pressure raises suddenly and significantly do not reduce trend, stop slip casting, realize slot release and reinforce the combination strengthened;
E, after cement mortar is solidified, crossdrift (5) continues driving, and enters top board 2m through coal seam (1), completes exposed coal work.
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| CN201310465569.0A CN103510957B (en) | 2013-10-08 | 2013-10-08 | A kind of combined type coal uncovering method |
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| CN201310465569.0A CN103510957B (en) | 2013-10-08 | 2013-10-08 | A kind of combined type coal uncovering method |
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| CN103510957A CN103510957A (en) | 2014-01-15 |
| CN103510957B true CN103510957B (en) | 2016-04-20 |
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| CN104594850A (en) * | 2014-12-19 | 2015-05-06 | 陈进 | Cement mortar hole sealing method of new coal mine |
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| CN111335938A (en) * | 2020-03-19 | 2020-06-26 | 中煤科工集团重庆研究院有限公司 | Coal rock solidifying rock cross-cut coal uncovering method |
| CN112855073B (en) * | 2021-02-04 | 2022-09-20 | 河南理工大学 | Device and method for solidifying coal bed by using microorganisms in cross-cut coal uncovering process |
| CN114658471B (en) * | 2022-03-28 | 2024-08-13 | 重庆大学 | Rock cross-cut coal uncovering grading outburst elimination method |
| CN117108283B (en) * | 2023-09-06 | 2024-03-19 | 中国矿业大学 | Fluidized coal mining method utilizing self energy storage of coal seam |
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