CN105041264B - A kind of mash gas pumping drilling whirl spraying solidify can multiple sealing of hole method - Google Patents

A kind of mash gas pumping drilling whirl spraying solidify can multiple sealing of hole method Download PDF

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Publication number
CN105041264B
CN105041264B CN201510298907.5A CN201510298907A CN105041264B CN 105041264 B CN105041264 B CN 105041264B CN 201510298907 A CN201510298907 A CN 201510298907A CN 105041264 B CN105041264 B CN 105041264B
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drilling
sealing
hole
gas
gas drainage
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CN105041264A (en
Inventor
林柏泉
刘统
宋吴兵
查伟
孔佳
郝志勇
孙炜浩
李博洋
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China University of Mining and Technology CUMT
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China University of Mining and Technology CUMT
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Abstract

A kind of mash gas pumping drilling whirl spraying solidify can multiple sealing of hole method, whirl spraying curing materials are uniformly sprayed in drilling wall surface using high-pressure rotary-spray equipment, the material can be good at penetrating into coalmass crevasse, it combines closely after solidification with coal body and intensity with higher, it can be realized and the crack around big drilling is sealed, and pass is fixed.Then the gas drainage pipe close for being cased with pouch is entered in drilling, injects the material of the same race into pouch with impregnator.After material solidification, connection gas drainage pipe carries out extraction, completes drilling first time sealing of hole.If the concentration of gas drainage is reduced to 30%, solidification can be sealed to big drilling again by high-pressure rotary-spray equipment, sealing of hole number is unlimited, to realize the lasting extraction of high concentration gas.The present invention repeatedly can carry out whirl spraying to drilling and solidify sealing of hole, hinder drilling deformation, improve the concentration of gas drainage, extend the service life of drilling.

Description

A kind of mash gas pumping drilling whirl spraying solidify can multiple sealing of hole method
Technical field
The present invention relates to a kind of method for sealing, especially a kind of mash gas pumping drilling whirl spraying suitable for underground coal mine solidifies Can repeatedly sealing of hole method.
Background technique
At present method for sealing mainly use cement mortar sealing of hole, polyurethane sealing of hole, hole packer sealing of hole, high-water material sealing of hole, Secondary hole sealing etc..But the mud pump equipment of cement mortar sealing of hole is heavy, flow rate of grouting is difficult to control;Polyurethane sealing of hole cost compared with It is high;Hole packer sealing of hole is only applicable to interim sealing of hole;The setting time of high-water material is influenced by the ratio of mud, is operated in underground site It is difficult to hold its accurate ratio of mud;The concentration of secondary hole sealing technology gas drainage in first sealing of hole is lower.In addition, working as gas When extraction concentration is reduced to 30% or less, the condition of gas utilization is not achieved.Existing technology can only often accomplish a sealing of hole Or secondary hole sealing, it can't accomplish multiple sealing of hole, to affect the service life of drilling.
Summary of the invention
Technical problem: it to invent for the problems such as current mine gas extraction concentration is lower, boring service life is not long, mention For one kind is easy to operate, sealing of hole is high-efficient, is capable of the method for repeatedly sealing of hole.
Technical solution: mash gas pumping drilling whirl spraying of the invention solidify can repeatedly sealing of hole method, include the following steps:
A. construct on coal body the drilling of certain length with the drill bit of Φ 113mm, moving back will rotation with high-pressure rotary-spray equipment after brill Spray curing materials are uniformly sprayed in drilling wall surface, are formed with fine and close sealant;
B. the gas drainage pipe close for being cased with pouch is entered in drilling, is injected into pouch together with impregnator by fluid injection hose The kind material closes b valve after pouch expansion;
C. after waiing upon the solidification of whirl spraying curing materials, a valve is opened, connection gas drainage pipe carries out extraction, completes drilling first Secondary sealing of hole;
If d. the concentration of gas drainage is reduced to 30% over time, can by high-pressure rotary-spray equipment to drill into Capable sealing and curing sealing of hole again, sealing of hole number is unlimited, to realize the lasting extraction of high concentration gas.
The pressure of the high-pressure rotary-spray equipment whirl spraying is 10~15Mpa.
The pouch material is linen.
The each whirl spraying of whirl spraying curing materials be formed by sealant with a thickness of 0.1~0.5mm, seal length is 12m。
The whirl spraying curing materials are that epoxy resin, talcum powder, alumina powder, toughener, diluent and curing agent are mixed It closes.Mass ratio is epoxy resin: talcum powder: alumina powder: toughener: diluent: curing agent=100:50:5:2:30: 18。
The utility model has the advantages that by adopting the above-described technical solution, the present invention is suitable for nearly horizontal drilling, downhole and uphole Gas drainage.By being repeatedly sealed to drilling whirl spraying curing material layer, intensity possessed by sealing material layer can be very The shape of good maintenance drilling does not change, and hinders the deformation of drilling, effectively prevents drilling collapse hole, prevents outside air Easily by crack passage access aperture bottom, influences gas drainage under suction concentration and be decreased obviously, substantially increase the concentration of gas drainage, extend The service life of drilling.Compared with prior art, the present invention its is easy to operate, time saving and energy saving, at low cost, using effect is good, fits It is wider with range, there is wide applicability in phase technical field.
Detailed description of the invention
Fig. 1 be mash gas pumping drilling whirl spraying of the invention solidify can repeatedly sealing of hole method arrangement schematic diagram.
In Fig. 1: 1- coal body, the crack 2-, 3- pouch, 4-a valve, 5- gas drainage pipe, 6-b valve, 7- fluid injection Hose, 8- sealant, 9- drilling.
Specific embodiment
One embodiment of the present of invention is further described with reference to the accompanying drawing:
The method of mine gas extraction drilling and sealing of the invention, using drill bit, drilling rod, drilling machine, drainage tube, pouch, height The instruments such as pressure rotary-spraying equipment, impregnator, and use whirl spraying curing materials as sealing material, the specific steps are as follows:
As shown in Figure 1, the drilling 9 of depth needed for being constructed on coal body with the drill bit of Φ 113mm first, needed for drill bit is drilled into The depth of setting, which retreats, bores, and is uniformly sprayed curing materials in 9 wall surfaces that drill using high-pressure rotary-spray equipment, forms one layer of densification Sealant 8, sealant 8 with a thickness of 0.1~0.5mm, seal length 12m;The pressure of the high-pressure rotary-spray equipment whirl spraying It can be to 10~15Mpa.The gas drainage pipe 5 for being cased with pouch 3 is filled in drilling 9 later, the length of the gas drainage pipe 5 Material for 1.2~1.5m, diameter 90mm, the pouch 3 is linen, is made of linen, the length of pouch 3 is 0.6m.The length that gas drainage pipe 5 exposes orifice end is 0.4m, and the length being exposed in hole is 0.2m.Fluid injection is inserted into pouch 3 Hose 7 opens the b valve 6 on fluid injection hose 7, and the material of the same race, capsule are injected into pouch 3 by fluid injection hose 7 with impregnator B valve 6 is closed after 3 expansion of bag.After material solidification, gas drainage pipe 5 is connected with gas drainage pipe network, opens a valve 4 and connect It connects gas drainage pipe 5 and carries out extraction, complete 9 first time sealing of holes of drilling;By the gas drainage in one period, due to the change in coal seam Shape, displacement, cause drill 9 periphery coal seams crack 2 expansion, development, outside air easily by crack passage access aperture bottom so that watt This extraction concentration is decreased obviously, and when concentration is reduced within 30%, the condition utilized is not achieved in gas drainage at this time, again by High-pressure rotary-spray equipment whirl spraying curing materials, the sealant 8 for forming another layer densification into drilling 9 are sealed solidification sealing of hole, with This improves the concentration of mash gas extraction;So in cycles, whirl spraying curing materials are repeatedly carried out into drilling 9 carry out sealing of hole, sealing of hole Number is unlimited, so that the concentration of gas drainage is continuously maintained in 30% or more, to realize the lasting extraction of high concentration gas.
The whirl spraying curing materials are epoxy resin, talcum powder, alumina powder, toughener, diluent and curing agent mixing It forms.Mass ratio is epoxy resin: talcum powder: alumina powder: toughener: diluent: curing agent=100:50:5:2:30:18.

Claims (2)

1. a kind of mash gas pumping drilling whirl spraying solidify can repeatedly sealing of hole method, it is characterised in that include the following steps:
A. the drilling (9) of depth needed for being constructed on coal body with the drill bit of Φ 113mm is revolved after moving back brill using high-pressure rotary-spray equipment Curing materials are uniformly sprayed (9) wall surface that makes to drill in drilling (9) wall surface and form fine and close sealant (8) by spray;Sealant 8 With a thickness of 0.1 ~ 0.5mm, seal length 12m;The pressure of the high-pressure rotary-spray equipment whirl spraying can be to 10 ~ 15Mpa;
B. the gas drainage pipe (5) for being cased with pouch (3) is filled in drilling (9), is inserted into fluid injection hose (7) into pouch (3), The b valve (6) on fluid injection hose (7) is opened, injects the material of the same race into pouch (3) by fluid injection hose (7) with impregnator, B valve (6) are closed after pouch (3) expansion;The length of the gas drainage pipe (5) is 1.2~1.5m, diameter 90mm;Institute The pouch (3) stated is made of linen, and the length of pouch (3) is 0.6m;
C. after the solidification of whirl spraying curing materials, the first time sealing of hole of drilling (9) is completed, gas drainage pipe (5) and gas are taken out It adopts pipe network to be connected, opens a valve (4) on gas drainage pipe, carry out extraction by gas drainage pipe (5);
D. when the concentration of gas drainage is reduced to 30%, again by high-pressure rotary-spray equipment along gas drainage pipe (5) to drilling (9) carry out whirl spraying sealing and curing, the sealant (8) for forming another layer densification is sealed solidification sealing of hole, prevent outside air by Crack passage access aperture bottom meets gas drainage condition so as to improve the concentration of mash gas extraction;So in cycles, sealing of hole Number is unlimited, to realize the lasting extraction of high concentration gas.
2. a kind of mash gas pumping drilling whirl spraying according to claim 1 solidify can repeatedly sealing of hole method, it is characterised in that: The curing materials of the whirl spraying are that epoxy resin, talcum powder, alumina powder, toughener, diluent and curing agent mix;Matter Amount is than being epoxy resin: talcum powder: alumina powder: toughener: diluent: curing agent=100:50:5:2:30:18.
CN201510298907.5A 2015-06-03 2015-06-03 A kind of mash gas pumping drilling whirl spraying solidify can multiple sealing of hole method Active CN105041264B (en)

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Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105781580A (en) * 2016-03-23 2016-07-20 韦积分 Tunnel crack repair method
CN105840231B (en) * 2016-04-12 2018-02-23 中国矿业大学 A kind of underground high stress weak seam repeats digging mash gas extraction method
CN106522831A (en) * 2016-11-25 2017-03-22 淮南矿业(集团)有限责任公司 Method for reinforcing borehole by polyurethane
CN106761542A (en) * 2016-12-01 2017-05-31 重庆南桐矿业有限责任公司 Cement mortar hole-sealing technology method
CN106639975A (en) * 2017-02-13 2017-05-10 中国矿业大学 Dynamic water-replenishing hole sealing method through high-water resin
CN111472833A (en) * 2020-06-08 2020-07-31 徐州工程学院 Method for sealing holes of cleaning-free drilling sealing section coal powder
CN111764864B (en) * 2020-07-10 2021-07-27 中国矿业大学 Drilling and guniting reinforcement method for loose and broken coal and rock area

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