CN105041264A - Method for repeated hole sealing on gas extraction drilling hole by rotary jet grouting and solidifying - Google Patents
Method for repeated hole sealing on gas extraction drilling hole by rotary jet grouting and solidifying Download PDFInfo
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- CN105041264A CN105041264A CN201510298907.5A CN201510298907A CN105041264A CN 105041264 A CN105041264 A CN 105041264A CN 201510298907 A CN201510298907 A CN 201510298907A CN 105041264 A CN105041264 A CN 105041264A
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- jet grouting
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Abstract
The invention relates to a method for repeated hole sealing on a gas extraction drilling hole by rotary jet grouting and solidifying. Rotary jet grouting and solidifying materials are uniformly sprayed on a drilling hole wall surface by high-pressure rotary jet grouting equipment and can permeate in cracks of coal masses well, after being solidified, the rotary jet grouting and solidifying materials can be tightly combined to the coal masses and have high strength, cracks surrounding a large drilling hole can be sealed, and the hole can be fixed. A gas extraction tube with a bag is plugged into the drilling hole, and the rotary jet grouting and solidifying materials are injected into the bag by a liquid injector. After the rotary jet grouting and solidifying materials are solidified, the gas extraction tube is used for extracting gas, and first-time hole sealing for the drilling hole is finished. If gas extraction concentration is reduced to 30%, the large drilling hole can be sealed and solidified by the high-pressure rotary jet grouting equipment again, and the hole sealing frequency is not limited so as to continuously extract high-concentration gas. The drilling hole can be repeatedly sealed by rotary jet grouting and solidifying, deformation of the drilling hole is avoided, gas extracting concentration is increased, and the service life of the drilling hole is prolonged.
Description
Technical field
The present invention relates to a kind of method for sealing, especially a kind of mash gas pumping drilling churning solidification being applicable to underground coal mine can the method for repeatedly sealing of hole.
Background technology
Current method for sealing mainly adopts 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 is higher; Hole packer sealing of hole is only applicable to interim sealing of hole; The setting time of high-water material, by the impact of water/binder ratio, is difficult to hold its water/binder ratio accurately in underground site operation; The concentration of secondary hole sealing technology gas pumping when first sealing of hole is lower.In addition, when gas extraction concentration is reduced to below 30%, do not reach the condition of gas utilization.Existing technology often can only accomplish a sealing of hole or secondary hole sealing, can't accomplish repeatedly sealing of hole, thus have impact on the application life of boring.
Summary of the invention
Technical problem: the problems such as, boring lower for current mine gas extraction concentration application life is long be invented, provide a kind of simple to operate, sealing of hole efficiency is high, can the method for repeatedly sealing of hole.
Technical scheme: mash gas pumping drilling churning of the present invention solidification can the method for repeatedly sealing of hole, comprises the steps:
A. to construct on coal body with the drill bit of Φ 113mm the boring of certain length, move back after boring and with high-pressure rotary-spray equipment, churning curing materials is uniformly sprayed at wall of holing, form the sealant with densification;
B. there is by cover the gas pumping pipe close of pouch to enter in boring, in pouch, inject this material of the same race with impregnator by fluid injection flexible pipe, after bladder expansion, close b valve;
C. wait upon after churning curing materials solidifies, open a valve, connect gas pumping pipe and carry out extraction, complete boring first time sealing of hole;
If d. the concentration of gas pumping is reduced to 30% over time, can carry out sealing and curing sealing of hole again by high-pressure rotary-spray equipment to boring, sealing of hole number of times is not limit, to realize the lasting extraction of high concentration gas.
The pressure of described high-pressure rotary-spray equipment churning is 10 ~ 15Mpa.
Described pouch material is linen.
The thickness of the sealant that the described each churning of churning curing materials is formed is 0.1 ~ 0.5mm, and seal length is 12m.
Described churning curing materials is that epoxy resin, French chalk, alumina powder, flexibilizer, thinner and curing compound mix.Mass ratio is epoxy resin: French chalk: alumina powder: flexibilizer: thinner: curing compound=100:50:5:2:30:18.
Beneficial effect: owing to have employed technique scheme, the present invention is applicable to the gas pumping of nearly horizontal drilling, lower perform hole and upper perform hole.By repeatedly sealing boring churning curing material layer, the shape that the intensity that sealing material layer has can be good at maintaining boring does not change, hinder the distortion of boring, effectively prevent boring collapse hole, prevent outside air easily by the bottom of the access of crack, affect gas drainage under suction concentration obviously to decline, substantially increase the concentration of gas pumping, extend the application life of boring.Compared with prior art, it is simple to operate in the present invention, and time saving and energy saving, cost is low, and result of use is good, and the scope of application is comparatively wide, has practicality widely in phase technical field.
Accompanying drawing explanation
Fig. 1 be mash gas pumping drilling churning of the present invention solidification can repeatedly sealing of hole method arrange schematic diagram.
In Fig. 1: 1-coal body, 2-crack, 3-pouch, 4-a valve, 5-gas pumping pipe, 6-b valve, 7-fluid injection flexible pipe, 8-sealant, 9-holes.
Detailed description of the invention
Below in conjunction with accompanying drawing, one embodiment of the present of invention are further described:
The method of mine gas extraction drilling and sealing of the present invention, adopt the apparatuses such as drill bit, drilling rod, rig, drainage tube, pouch, high-pressure rotary-spray equipment, impregnator, and use churning curing materials as sealing material, concrete steps are as follows:
As shown in Figure 1, first to construct on coal body with the drill bit of Φ 113mm the boring 9 of desired depth, bit drills retreats brill to the degree of depth of required setting, high-pressure rotary-spray equipment is utilized to be uniformly sprayed by curing materials at boring 9 wall, form the sealant 8 of one deck densification, the thickness of sealant 8 is 0.1 ~ 0.5mm, and seal length is 12m; The pressure of described high-pressure rotary-spray equipment churning can to 10 ~ 15Mpa.Have the gas pumping pipe 5 of pouch 3 to fill in boring 9 in cover afterwards, the length of described gas pumping pipe 5 is 1.2 ~ 1.5m, and diameter is 90mm, and the material of described pouch 3 is linen, is made up of linen, and the length of pouch 3 is 0.6m.The length that gas pumping pipe 5 exposes orifice end is 0.4m, and the length be exposed in hole is 0.2m.In pouch 3, insert fluid injection flexible pipe 7, open the b valve 6 on fluid injection flexible pipe 7, in pouch 3, inject this material of the same race by fluid injection flexible pipe 7 with impregnator, after pouch 3 expands, close b valve 6.After material solidification, gas pumping pipe 5 is connected with gas pumping pipe network, opens a valve 4 and connect gas pumping pipe 5 and carry out extraction, complete boring 9 first time sealing of hole; Through the gas pumping in one period, due to distortion, the displacement in coal seam, the crack 2 in boring 9 periphery coal seam is caused to expand, grow, outside air, easily by the bottom of the access of crack, makes gas drainage under suction concentration obviously decline, when concentration is reduced within 30%, now gas pumping does not reach the condition of utilization, again pass through high-pressure rotary-spray equipment to churning curing materials in boring 9, the sealant 8 forming another layer densification carries out sealing and curing sealing of hole, improves the concentration of mash gas extraction with this; So go round and begin again, in boring 9, repeatedly carry out churning curing materials carry out sealing of hole, sealing of hole number of times is not limit, and makes the concentration of gas pumping continue to remain on more than 30%, thus realizes the lasting extraction of high concentration gas.
Described churning curing materials is that epoxy resin, French chalk, alumina powder, flexibilizer, thinner and curing compound mix.Mass ratio is epoxy resin: French chalk: alumina powder: flexibilizer: thinner: curing compound=100:50:5:2:30:18.
Claims (6)
1. mash gas pumping drilling churning solidification can the method for repeatedly sealing of hole, it is characterized in that comprising the steps:
A. to construct on coal body with the drill bit of Φ 113mm the boring (9) of desired depth, utilize the churning of high-pressure rotary-spray equipment to be uniformly sprayed by curing materials at boring (9) wall after moving back brill, make boring (9) wall form fine and close sealant (8);
B. the gas pumping pipe (5) of pouch (3) is had by cover to fill in boring (9), fluid injection flexible pipe (7) is inserted in pouch (3), open the b valve (6) on fluid injection flexible pipe (7), in pouch (3), inject this material of the same race by fluid injection flexible pipe (7) with impregnator, after pouch (3) expands, close b valve (6);
C. wait upon after churning curing materials solidifies, open a valve (4), connect gas pumping pipe (5) and carry out extraction, complete the first time sealing of hole of boring (9);
D. when the concentration of gas pumping is reduced to 30%, again along gas pumping pipe (5), churning sealing and curing is carried out to boring (9) by high-pressure rotary-spray equipment, the sealant (8) forming another layer densification carries out sealing and curing sealing of hole, prevent outside air by the bottom of the access of crack, improve the concentration of mash gas extraction with this, meet gas pumping condition; So go round and begin again, sealing of hole number of times is not limit, thus realizes the lasting extraction of high concentration gas.
2. a kind of mash gas pumping drilling churning solidification according to claim 1 can the method for repeatedly sealing of hole, it is characterized in that: the length of described gas pumping pipe (5) is 1.2 ~ 1.5m, and diameter is 90mm.
3. a kind of mash gas pumping drilling churning solidification according to claim 1 can the method for repeatedly sealing of hole, it is characterized in that: described pouch (3) is made for linen, and the length of pouch (3) is 0.6m.
4. a kind of mash gas pumping drilling churning solidification according to claim 1 can the method for repeatedly sealing of hole, it is characterized in that: the pressure of described high-pressure rotary-spray equipment churning can to 10 ~ 15Mpa.
5. a kind of mash gas pumping drilling churning solidification according to claim 1 can the method for repeatedly sealing of hole, it is characterized in that: the thickness of described sealant (8) is 0.1 ~ 0.5mm, and seal length is 12m.
6. a kind of mash gas pumping drilling churning solidification according to claim 1 can the method for repeatedly sealing of hole, it is characterized in that: the curing materials of described churning is that epoxy resin, French chalk, alumina powder, flexibilizer, thinner and curing compound mix.Mass ratio is epoxy resin: French chalk: alumina powder: flexibilizer: thinner: curing compound=100:50:5:2:30:18.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510298907.5A CN105041264B (en) | 2015-06-03 | 2015-06-03 | A kind of mash gas pumping drilling whirl spraying solidify can multiple sealing of hole method |
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| CN201510298907.5A CN105041264B (en) | 2015-06-03 | 2015-06-03 | A kind of mash gas pumping drilling whirl spraying solidify can multiple sealing of hole method |
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| CN105041264A true CN105041264A (en) | 2015-11-11 |
| CN105041264B CN105041264B (en) | 2018-12-14 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105781580A (en) * | 2016-03-23 | 2016-07-20 | 韦积分 | Tunnel crack repair method |
| CN105840231A (en) * | 2016-04-12 | 2016-08-10 | 中国矿业大学 | Repeatable hole digging gas extraction method for down-hole high-stress soft coal seam |
| 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 |
| CN106639975A (en) * | 2017-02-13 | 2017-05-10 | 中国矿业大学 | Dynamic water-replenishing hole sealing method through high-water resin |
| 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 |
| CN110055971A (en) * | 2019-04-08 | 2019-07-26 | 中铁第四勘察设计院集团有限公司 | A kind of hole wall refractory gunning equipment |
| CN110159226A (en) * | 2019-06-19 | 2019-08-23 | 贵州盘江精煤股份有限公司 | A kind of gas control provided pipe fast plugging device |
| 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 |
| CN111764864A (en) * | 2020-07-10 | 2020-10-13 | 中国矿业大学 | Drilling and guniting reinforcement method for loose and broken coal and rock area |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105781580A (en) * | 2016-03-23 | 2016-07-20 | 韦积分 | Tunnel crack repair method |
| CN105840231A (en) * | 2016-04-12 | 2016-08-10 | 中国矿业大学 | Repeatable hole digging gas extraction method for down-hole high-stress soft coal seam |
| 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 |
| CN110055971A (en) * | 2019-04-08 | 2019-07-26 | 中铁第四勘察设计院集团有限公司 | A kind of hole wall refractory gunning equipment |
| CN110159226A (en) * | 2019-06-19 | 2019-08-23 | 贵州盘江精煤股份有限公司 | A kind of gas control provided pipe fast plugging device |
| 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 |
| CN111764864A (en) * | 2020-07-10 | 2020-10-13 | 中国矿业大学 | Drilling and guniting reinforcement method for loose and broken coal and rock area |
Also Published As
| Publication number | Publication date |
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| CN105041264B (en) | 2018-12-14 |
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Inventor after: Lin Baiquan Inventor after: Liu Tong Inventor after: Song Wubing Inventor after: Cha Wei Inventor after: Kong Jia Inventor after: Hao Zhiyong Inventor after: Sun Weihao Inventor after: Li Boyang Inventor before: Lin Baiquan Inventor before: Song Wubing Inventor before: Hao Zhiyong Inventor before: Sun Weihao Inventor before: Li Boyang |
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