CN108266189A - A kind of lane top Tunnelling Along Goaf goaf isolation method - Google Patents

A kind of lane top Tunnelling Along Goaf goaf isolation method Download PDF

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Publication number
CN108266189A
CN108266189A CN201810075876.0A CN201810075876A CN108266189A CN 108266189 A CN108266189 A CN 108266189A CN 201810075876 A CN201810075876 A CN 201810075876A CN 108266189 A CN108266189 A CN 108266189A
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China
Prior art keywords
goaf
lane
along
working
mining
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Pending
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CN201810075876.0A
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Chinese (zh)
Inventor
王朋飞
冯国瑞
张玉江
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Taiyuan University of Technology
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Taiyuan University of Technology
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Priority to CN201810075876.0A priority Critical patent/CN108266189A/en
Publication of CN108266189A publication Critical patent/CN108266189A/en
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21CMINING OR QUARRYING
    • E21C41/00Methods of underground or surface mining; Layouts therefor
    • E21C41/16Methods of underground mining; Layouts therefor
    • E21C41/18Methods of underground mining; Layouts therefor for brown or hard coal
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D17/00Caps for supporting mine roofs

Abstract

The invention belongs to along field of coal mining, specifically a kind of lane top Tunnelling Along Goaf goaf completely cuts off method.Include the following steps:1)Wrong formula working face in staggered floor position is designed, gob side entry driving is pushed up for face formation lane of continuing and prepares;2)To playing slope section working face rear goaf paving metal mesh and grouting during first mining face exploitation;3)After first mining face exploits 36 months, digging subsequent duty face lane top gob side entry driving is tunneled at any time with supporting, and when supporting overlays geomembrane isolation goaf between backboard and canopy formula stent.Present invention operation is easy, and cost is relatively low, it is ensured that the safe and efficient production of staggered floor position working face.

Description

A kind of lane top Tunnelling Along Goaf goaf isolation method
Technical field
The invention belongs to along field of coal mining, specifically a kind of lane top Tunnelling Along Goaf goaf completely cuts off method.
Background technology
Consumption of coal accounts for the 62.0% of 2016 total energy consumption of China.Coal for a long time by be still China basic energy resource. The weight that the science suitable development person that will be Coal work of coal resources faces how is realized in following considerable time Want one of task.
China's coal-mine is mainly well work broadwall, before sensible longwall mining working face, need to dig section road, section lane Road occupies very important effect in entire mine production system.However, with the extensive extraction of easy mining coal seam, China coal seam Mining conditions constantly deteriorate, and most of mines are just developed with fast speed to deep.
By the shadow of many factors such as the complex geological conditions such as high-ground stress, Qiang Caidong, seam inclination, the rate of extraction and environment It rings, routinely coal pillar width is stayed to increase increasingly, the staying to set of section road is increasingly improved with supporting requirement, and support cost is growing, Coal column causes the safe things such as impulsion pressures accident, large deformation of roadway, roof fall, the coal and gas prominents such as the shake of section road ore deposit, rock burst Therefore take place frequently, equipment damage and casualties are caused, seriously restricts the safe and efficient production of coal mine.
In view of conventional long wall with coal pillar exploitation existing problem in terms of the voltage-controlled system of ore deposit and the rate of extraction, a large amount of scholars are according to adopting Dynamic stress distribution rule proposes novel section coal petrography post design method, as gob side entry retaining, gob side entry driving, staggered floor position production technique with And the technologies such as wrong formula arrangement and digging laneway in separate zone production lower leaf.These technologies are to utilize the law of mining ground pressure distribution, Along mined out area edge and the relatively low area of goaf surrounding coal body marginal existence pressure or distressed zone.These technologies significantly improve tunnel Maintenance effects, ore deposit pressure show apparent decrease, and impact risk is greatly reduced, and have been established well for the safe and efficient production of China's coal-mine Science and technology support.
However, since this kind of tunnel is located at mined out area edge or goaf bottom, goaf can be direct or indirect with tunnel It links up, there are a variety of toxic and harmful gas such as gas, carbon monoxide, it is always mine staff load that goaf, which threatens, in goaf The problem of heart.For a long time, isolation problem in goaf does not find satisfied solution always.
For example, in separate zone production, completely cut off goaf, and increase false top for formula tunnel wrong in lower leaf frequently with grouting measure Cementing and compaction rate, meet requirement of engineering, this goaf isolation effect is undesirable, and cost is higher, and labor intensity is big, material Material transport inconvenience etc..
Common gob side entry retaining is generally wall constructed in mined out side, generally using ointment material or high percentage of water rapid solidifying material, with branch Support roof strata simultaneously completely cuts off goaf, but in fact, there are a large amount of large fractures, tunnel leakages gob side entry roof strata and mined out side Wind is serious.A large amount of gob side entry retaining practices also indicate that gob side entry retaining cost is very high, into lane supporting expense up to 8000 yuan/meter.
Common gob side entry driving alleviates surrounding rock failure to a certain extent compared with gob side entry retaining, reduces crack amount and flaw size. Also see that whitewashing measure increases country rock compaction rate in gob side entry driving engineering, completely cut off goaf, but complicated for operation, haul is heavy.And The shield lane thin coal pillar of gob side entry driving by multiple dynamic load due to being influenced, and thin coal pillar stress is larger, and deformation failure is serious, and roadway deformation is outstanding Its pucking is serious.
For this purpose, using for reference gob side entry driving and the advantage of formula arrangement wrong in separate zone production lower leaf, there is scholar to propose staggered floor position lane Road arranges, the different layers position of the roadway layout at stope both ends in coal seam, Adjacent Working Face tunnel stereo staggered, with point Wrong formula tunnel is similar in lower leaf in layer exploitation, and the staggered floor position wrong formula back in face lower floor position that continues is Man-made False, referred to as Gob side entry driving is pushed up for lane.
Numerous studies and coal mining time-proven, lane top gob side entry driving is ingenious to be utilized the ore deposit pressure regularity of distribution, and the tunnel is in adopting Tunnel below the edge of dead zone, substantially less than the stress of primary rock, roadway support is easier to surrouding rock stress environment, more conventional gob side entry retaining and Gob side entry driving, support cost is relatively low, is gateway layout method best in all kinds of gob side entries.
In complete lane top edge sky, top plate is in direct contact with goaf, quotes separate zone production measure, usually in upper one work With regard to water filling cement mortar when face is exploited, push up gob side entry for lane and preferably more complete top side condition is provided, it is shown as discussed above, it is this Method operation is responsible for, and labor intensity is big, and transport of materials is inconvenient, time-consuming.After general lane top gob side entry is dug, also To coordinate simultaneously and wall whitewashing measure is taken to improve tunnel seal.
But current present situation is made a general survey of, the goaf isolation problem of lane top gob side entry driving is not solved preferably always, mined out Area's threat is higher, reduces the application effect of the production technique, constrains the popularization and application of the technology.
Invention content
The present invention to solve the above-mentioned problems, provides a kind of lane top Tunnelling Along Goaf goaf isolation method.
The present invention takes following technical scheme:A kind of lane top Tunnelling Along Goaf goaf isolation method, including following step Suddenly:
1)Wrong formula working face in staggered floor position is designed, gob side entry driving is pushed up for face formation lane of continuing and prepares;
2)To playing slope section working face rear goaf paving metal mesh and grouting during first mining face exploitation;
3)After first mining face exploitation 3-6 months, digging subsequent duty face lane top gob side entry driving is tunneled at any time with supporting, supporting When between backboard and canopy formula stent overlay geomembrane isolation goaf.
The step 1)In, working face side tunnel is arranged along top plate, and opposite side tunnel is along backplane, two adjacent works Make face and form stereo staggered overlap joint, each working face right end is there are gentle slope section, the tunnel shape below the lap-joint of subsequent duty face Gob side entry driving is pushed up into lane, positioned at stress relaxed area.
First mining face and subsequent duty face have one end to form overlap joint, wherein the air inlet I of first mining face is opened with conventional It adopts identical, i.e., is tunneled along bottom plate, and air return lane I is tunneled along roof.After first mining face exploitation, subsequent duty face air inlet II then along below upper one work face goaf tunnel by mono- lanes of Nei Cuo, forms lane top Tunnelling Along Goaf, i.e. air inlet II, the tunnel Top plate is in direct contact with goaf, and the arrangement of air return lane II is identical with air return lane I arrangements, i.e., is tunneled along top plate, Working face is arranged so as to down successively, and first mining face exploitation roof caving tunnels the tunnel in subsequent duty face, cloth again after stablizing Working face is put, it is general to be spaced 3-6 months.
The step 2)In, the metal mesh of laying is using rhombus net, and grouting is using yellow mud.
The step 3)In, supporting uses artificial shed shoring, pushes up side backboard and timber wedge beats jail, geomembrane will add It is layered between canopy formula stent and backboard, when laying will carry out tunneling boring laying other than base plate paving, and geomembrane more than needed is pressed on Canopy leg bottom.
Compared with prior art, the present invention provides a kind of lane top Tunnelling Along Goaf goaf isolation technologies.This method Solution route is provided for the staggered floor position long-standing Air Leakage of coal-mining method inter-road top gob side entry driving, execute-in-place is easy, and Cost is relatively low, it is ensured that the safe and efficient production of staggered floor position working face.
Description of the drawings
Fig. 1 is adjacent staggered floor position working face plane of arrangement figure;
Fig. 2 arranges sectional view for adjacent staggered floor position working face;
Strata movement situation schematic diagram after mining face exploitation headed by Fig. 3;
Tu4Wei lanes top gob side entry driving isolation goaf method for protecting support schematic diagram;
Fig. 5 is embodiment schematic diagram;
1- air inlets I, 2- head mining faces in figure, 3- air inlets II, 4- air return lane I, 5- subsequent duty face, 6- air return lane II, 7- metal meshes, 8- top beams, 9- geomembranes, 10- backboards, 11- canopy legs, 12-18111 air inlets, 13-18111 working faces, 14- 18111-1 air inlets, 15-18111 air return lanes, 16-18111-1 working faces, 17-18111-1 air return lanes.
Specific embodiment
Below by taking Practical Project background as an example, the present invention is described in detail.However those skilled in the art should recognize Know, the present invention is not therefore subject to any restriction.
The specific method of the present invention is as follows:
The first step:18111 and 18111-1 working faces are designed as in staggered floor position wrong formula and mutually overlap working face.As shown in figure 5, town 18111 working face of city bottom ore deposit and 18111-1 working faces using staggered floor position roadway layout, i.e. 18111 working face air inlets along bottom plate, Air return lane is tunneled along top plate.For adjacent 18111-1 working faces air inlet, i.e. lane top gob side entry driving, then tunneled along bottom plate, with Wrong arrangement in 18111 working face return air, below 18111 work face goaf edges.With 18111 tailentry phases Seemingly, 18111-1 tailentries are also tunneled along top plate.Two Adjacent Working Faces form stereo staggered overlap joint, and each working face is right There are gentle slope sections at end.
Second step:To playing slope section working face rear goaf paving metal mesh and grouting during 18111 working face mining.For Degree of consolidation is improved on 18111-1 air inlets lane top gob side entry driving vacation top, creates ideal roof condition.
Third walks:After 18111 working face minings, 18111-1 air inlets and air return lane are dug in interval 3-6 months And supporting, wherein, the support pattern for overlaying geomembrane isolation goaf is taken 18111-1 air inlets.Using artificial frame canopy branch Shield, top side backboard, timber wedge beat jail, in addition to this, the common cheap soil of municipal works are overlayed between canopy formula stent and backboard Work material (such as steel modeling geomembrane, market price about $1.5-2/m2).It carries out the tunneling boring in addition to bottom plate to be laid with, at canopy leg bottom Portion's geomembrane will reserve surplus, be pressed under canopy leg, to achieve the purpose that completely cut off comprehensively.

Claims (5)

1. a kind of lane top Tunnelling Along Goaf goaf isolation method, it is characterised in that:Include the following steps:
1)Wrong formula working face in staggered floor position is designed, gob side entry driving is pushed up for face formation lane of continuing and prepares;
2)To playing slope section working face rear goaf paving metal mesh and grouting during first mining face exploitation;
3)After first mining face exploitation 3-6 months, digging subsequent duty face lane top gob side entry driving is tunneled at any time with supporting, supporting When between backboard and canopy formula stent overlay geomembrane isolation goaf.
2. lane top according to claim 1 Tunnelling Along Goaf goaf isolation method, it is characterised in that:The step 1)In, working face side tunnel is arranged along top plate, and opposite side tunnel forms stereo staggered and take along backplane, two Adjacent Working Faces It connects, there are gentle slope section, the tunnel formation lane top gob side entry driving below the lap-joint of subsequent duty face is located at each working face right end Stress relaxed area.
3. lane top according to claim 2 Tunnelling Along Goaf goaf isolation method, it is characterised in that:First mining face There is one end to form overlap joint with subsequent duty face, wherein the air inlet I of first mining face is identical with conventional exploitation, i.e., dug along bottom plate Into, and air return lane I is tunneled along roof, after first mining face exploitation, subsequent duty face air inlet II then mono- lanes of Nei Cuo along upper It is tunneled below one work face goaf, forms lane top Tunnelling Along Goaf, i.e. air inlet II, the back and goaf are direct Contact, and the arrangement of air return lane II is identical with air return lane I arrangements, i.e., is tunneled along top plate, working face such cloth successively It puts down, first mining face exploitation roof caving tunnels the tunnel in subsequent duty face again after stablizing, arrange working face, be spaced 3-6 A month.
4. lane top according to claim 1 Tunnelling Along Goaf goaf isolation method, it is characterised in that:The step 2)In, the metal mesh of laying is using rhombus net, and grouting is using yellow mud.
5. lane top according to claim 1 Tunnelling Along Goaf goaf isolation method, it is characterised in that:The step 3)In, supporting uses artificial shed shoring, pushes up side backboard and timber wedge beats jail, geomembrane will be overlayed in canopy formula stent and backboard Between, when laying, will carry out tunneling boring laying other than base plate paving, and geomembrane more than needed is pressed on canopy leg bottom.
CN201810075876.0A 2018-01-26 2018-01-26 A kind of lane top Tunnelling Along Goaf goaf isolation method Pending CN108266189A (en)

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CN110080767A (en) * 2019-04-03 2019-08-02 太原理工大学 A kind of thick seam slicing system working face overlap joint method for arranging
CN110242322A (en) * 2019-07-02 2019-09-17 中国矿业大学(北京) A kind of roadway layout method of super high seam gob side entry retaining
CN110410132A (en) * 2019-08-06 2019-11-05 陕西煤业化工技术研究院有限责任公司 One kind, which is stayed, sets thin coal pillar leakproof wind process

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110080767A (en) * 2019-04-03 2019-08-02 太原理工大学 A kind of thick seam slicing system working face overlap joint method for arranging
CN110242322A (en) * 2019-07-02 2019-09-17 中国矿业大学(北京) A kind of roadway layout method of super high seam gob side entry retaining
CN110410132A (en) * 2019-08-06 2019-11-05 陕西煤业化工技术研究院有限责任公司 One kind, which is stayed, sets thin coal pillar leakproof wind process

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Application publication date: 20180710