CN106869986A - Special thickness comprehensive coal face coal body high pressure water injection dust-removing method - Google Patents

Special thickness comprehensive coal face coal body high pressure water injection dust-removing method Download PDF

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Publication number
CN106869986A
CN106869986A CN201710130183.2A CN201710130183A CN106869986A CN 106869986 A CN106869986 A CN 106869986A CN 201710130183 A CN201710130183 A CN 201710130183A CN 106869986 A CN106869986 A CN 106869986A
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CN
China
Prior art keywords
coal
water injection
water
dust
hole
Prior art date
Application number
CN201710130183.2A
Other languages
Chinese (zh)
Inventor
于斌
段宏飞
葛锦臣
王文强
刘宝志
梁民权
顼熙亮
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大同煤矿集团有限责任公司
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Application filed by 大同煤矿集团有限责任公司 filed Critical 大同煤矿集团有限责任公司
Priority to CN201710130183.2A priority Critical patent/CN106869986A/en
Publication of CN106869986A publication Critical patent/CN106869986A/en

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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F5/00Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
    • E21F5/02Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires by wetting or spraying

Abstract

The present invention relates to coal mining dust-removing method, specially special thickness comprehensive coal face coal body high pressure water injection dust-removing method solves the problems, such as to lack the method that dust concentration is controlled when exploiting special thickness comprehensive coal face coal body, scheme at present:Comprise the following steps:A, after actual mining donut is good, it is 90 ° of water injection hole to be bored in the air intake crossheading and air return way of stope with crossheading angle;B, sealing of hole is carried out to water injection hole with hole packer;C, water filling is carried out to water injection hole with water injecting pump.Advantage:1st, by the special thick comprehensive generation put back to mining face pumping water into coal, eliminate dust to greatest extent from root, so as to effectively reduce the dust rate of stope;2nd, it is obvious for preventing and treating spontaneous fire effect by the special thick comprehensive temperature put back to mining face pumping water into coal, effectively reduce coal body in the range of back production;3rd, water injecting drilling layout design is rationally, simple to operate, is easy to construction, and dust-laying effect is notable.

Description

Special thickness comprehensive coal face coal body high pressure water injection dust-removing method

Technical field

The present invention relates to coal mining dust-removing method, specially special thickness comprehensive coal face coal body high pressure water injection dust-removing method.

Background technology

The coal dust of underground coal mine fine particle is one of the Nature disaster of mine five, coal dust it is very harmful, it is not Operating environment is only polluted, influence miner's is healthy, and miner can be triggered to suffer from pneumoconiosis;And when Dust Concentration and oxygen concentration Reach certain limit and coal-dust explosion can occur when having naked light, its harmfulness is very huge.Especially in modernization high-yield and high-efficiency Large-scale mine in, generally adopted using ultra thick coal bed fully mechanized putting back to, coal cutting and the coal dust amount up to 1000- produced when putting coal 2000mg/m3.In this regard, both at home and abroad by substantial amounts of research, it is proposed that much carry out arranging for depositing dust operation to the dust after generation Apply and equipment, having the special thick comprehensive dust concentration for putting back to mining face significantly reduces, but its dust concentration is still far Exceed《Safety regulations in coal mine》Relevant regulations.Therefore, dust concentration when design one kind can be exploited to special thickness comprehensive coal face coal body The dust-removing method being controlled extremely is necessary.

The content of the invention

The present invention solves the problems, such as to lack the method that dust concentration is controlled when exploiting special thickness comprehensive coal face coal body at present, A kind of special thickness comprehensive coal face coal body high pressure water injection dust-removing method is provided.

The present invention is realized by following operating procedure:Special thickness comprehensive coal face coal body high pressure water injection dust-removing method, including with Lower operating procedure:

A, after actual mining donut is good, in the air intake crossheading and air return way of stope bore with crossheading angle be 90 ° Water injection hole;

B, sealing of hole is carried out to water injection hole with hole packer;

C, water filling is carried out to water injection hole with water injecting pump.

Water injection hole is located in air intake crossheading and air return way at roadway floor 1.2m in the step a.Water injection hole is away from lane Road base plate 1.2m, both facilitates drilling machine construction, ensures that water injection hole water filling scope, saves construction drill quantity, cost-effective to carry High efficiency.The drilling depth of water injection hole need to ensure that length reaches more than the 3/4 of stope tilt length in the step a. Drilling depth determines that length reaches more than the 3/4 of tilt length, it is ensured that water content is equal everywhere according to stope tilt length It is even, it is ensured that dust-laying effect is best.The drilling elevation angle of water injection hole should ensure that water filling bore end is little away from roof in the step a In 1m.The drilling elevation angle of water injection hole determines according to the average coal seam thickness of stope, it is ensured that water content is uniform after water filling, depositing dust Effect is more preferable.Stope whole coal seam water content reaches 4% after water injection hole drill hole density should ensure that water filling in the step a. Water injection hole drill hole density determines according to the radius of wetted bulb in stope coal seam, it is ensured that complete extraction working face coal seam water content reaches To 4%, you can dust concentration when reducing production to greatest extent, excess waste water resource is unlikely to again, and caused not during to exploitation Just.Water injection hole need to carry out water filling in the back production previous moon in the step c, and water injecting pump can simultaneously connect porous during water filling(4~6 It is individual)Water filling simultaneously, hole position movement accordingly moves hole with fully mechanized mining progress, and the nearest water injection hole of continuous face keeps 30m.In advance to water filling Hole carries out water filling so that after water filling can uniformly penetrating to coal seam everywhere, it is ensured that water content uniform lift everywhere, dust-laying effect is more preferably Significantly.First water filling is first carried out to coal body using static pressure water in the step c, then water filling is carried out with high-pressure pump.First use static pressure Water filling, then high pressure pump priming is used, realize that hydraulic fracturing permeates coal seam, increase water injection rate, improve coal seam water content, it is ensured that depositing dust is imitated Fruit is significantly.

Produced when coal cinder slides when the dust of stope is due to coal cutting in stoping operation and Sub-Level Caving, raw coal contains It is the main cause for producing coal dust that water is low, there is also substantial amounts of primary dust inside coal seam in addition, by high pressure water injection, is made back The secondary dust of the coal body moistening in mining face region, primary dust and mining influence is bonded.Moistening coal body hardness is with wet The increase of degree and reduce, so as to effectively reduce the generation rate of dust and the temperature in coal seam.

The present invention has advantages below:1st, mining face pumping water into coal is put back to by special thickness is comprehensive, the maximum limit from root The generation of the elimination dust of degree, so as to effectively reduce the dust rate of stope;2nd, work is adopted by comprehensive the putting back to of special thickness Make face pumping water into coal, effectively reduce the temperature of coal body in the range of back production, it is obvious for preventing and treating spontaneous fire effect;3rd, water filling is bored Hole layout design is rationally, simple to operate, is easy to construction, and dust-laying effect is notable.

Brief description of the drawings

Fig. 1 is that water injection hole of the present invention arranges schematic diagram;

Fig. 2 is the A-A faces sectional view of Fig. 1;

In figure:1- air intake crossheadings, 2- air return way, 3- water injection holes, 4- back production lines, 5- roofs.

Specific embodiment

The present invention is illustrated with reference to embodiment and Figure of description:The special thickness comprehensive coal face coal body work of certain underground coal mine Make the average coal seam thickness in face for 13m, tilt length is 200m, strike length is 1000m, and coal seam radius of wetted bulb is 12.5m, is used The coal winning technology of low caving coal carries out back production.

Using special thickness comprehensive coal face coal body high pressure water injection dust-removing method of the invention, implement following operating procedure:

After a, stope are irised out, the construction water injection hole 3 in air intake crossheading 1 and air return way 2, aperture is φ 65mm, by work Make face tilt length 200, determine that drilling depth is 150m;By the average coal seam thickness 13m of working face, it is determined that the drilling elevation angle is 5 °; It is 12.5m by working face coal body radius of wetted bulb, determines that water injection hole neighbor distance is 25m, air intake crossheading 1 and return air in same crossheading The alternate arrangement of the water injection hole of crossheading 2, pitch of holes 12.5m;Untill water injection hole 3 is arranged into back production line 4 from working face open-off cut eye along two crossheadings;

After b, the construction of water injection hole 3 are finished, sealing of hole is carried out to water injection hole 3 with hole packer;

C, water filling is carried out to water injection hole 3 in the back production previous moon, first water filling is first carried out to water injection hole 3 using static pressure water, thereafter High pressure pump priming is carried out again, is realized to the secondary water filling of coal body, is increased water injection rate;Water injecting pump can connect porous during water filling(4-6) Water filling simultaneously, hole position movement accordingly moves hole with fully mechanized mining progress, and the nearest water injection hole 3 of continuous face keeps 30m, contains back production coal seam Water reaches 4%.

After spy thickness comprehensive coal face implements dust-removing method of the invention, face dust concentration is relatively greatly reduced before, makes Face dust concentration reaches 50mg/m3, working face dust is reduced to safety of coal mines after coordinating fully mechanized mining automated spray system Within code setting, the operating environment of working face personnel is substantially improved, it is ensured that production safety.

Claims (7)

1. a kind of special thickness comprehensive coal face coal body high pressure water injection dust-removing method, it is characterised in that:Including following operating procedure:
A, after actual mining donut is good, in the air intake crossheading of stope(1)And air return way(2)Interior brill and crossheading angle It is 90 ° of water injection hole(3);
B, with hole packer to water injection hole(3)Carry out sealing of hole;
C, with water injecting pump to water injection hole(3)Carry out water filling.
2. special thickness comprehensive coal face coal body high pressure water injection dust-removing method according to claim 1, it is characterised in that:The step a Middle water injection hole(3)Positioned at air intake crossheading(1)And air return way(2)It is interior at roadway floor 1.2m.
3. special thickness comprehensive coal face coal body high pressure water injection dust-removing method according to claim 1 and 2, it is characterised in that:The step Water injection hole in rapid a(3)Drilling depth need to ensure that length reaches more than the 3/4 of stope tilt length.
4. special thickness comprehensive coal face coal body high pressure water injection dust-removing method according to claim 3, it is characterised in that:The step a Middle water injection hole(3)The drilling elevation angle should ensure that water filling bore end away from roof(5)No more than 1m.
5. special thickness comprehensive coal face coal body high pressure water injection dust-removing method according to claim 4, it is characterised in that:The step a Middle water injection hole(3)Stope whole coal seam water content reaches 4% after drill hole density should ensure that water filling.
6. special thickness comprehensive coal face coal body high pressure water injection dust-removing method according to claim 5, it is characterised in that:The step c Middle water injection hole(3)Water filling need to be carried out in the back production previous moon, water injecting pump can connect porous while water filling, hole position shifting simultaneously during water filling It is dynamic accordingly to move hole, the nearest water injection hole of continuous face with fully mechanized mining progress(3)Keep 30m.
7. special thickness comprehensive coal face coal body high pressure water injection dust-removing method according to claim 6, it is characterised in that:The step c It is middle that first water filling is first carried out to coal body using static pressure water, then carry out water filling with high-pressure pump.
CN201710130183.2A 2017-03-07 2017-03-07 Special thickness comprehensive coal face coal body high pressure water injection dust-removing method CN106869986A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710130183.2A CN106869986A (en) 2017-03-07 2017-03-07 Special thickness comprehensive coal face coal body high pressure water injection dust-removing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710130183.2A CN106869986A (en) 2017-03-07 2017-03-07 Special thickness comprehensive coal face coal body high pressure water injection dust-removing method

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Publication Number Publication Date
CN106869986A true CN106869986A (en) 2017-06-20

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105422164A (en) * 2015-12-14 2016-03-23 河南理工大学 Efficient water injection method and device of hydraulic fracture permeability increase auxiliary coal seam
CN105804781A (en) * 2014-12-30 2016-07-27 党亮才 Coal mine underground stope face dustproof method
CN105863717A (en) * 2016-06-13 2016-08-17 淮南矿业(集团)有限责任公司 Method for preventing rib spalling by injecting water to soft coal seam mining face

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105804781A (en) * 2014-12-30 2016-07-27 党亮才 Coal mine underground stope face dustproof method
CN105422164A (en) * 2015-12-14 2016-03-23 河南理工大学 Efficient water injection method and device of hydraulic fracture permeability increase auxiliary coal seam
CN105863717A (en) * 2016-06-13 2016-08-17 淮南矿业(集团)有限责任公司 Method for preventing rib spalling by injecting water to soft coal seam mining face

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
丁林林: "塔山矿大采高综放工作面煤层注水防尘技术", 《煤矿现代化》 *

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Application publication date: 20170620

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