CN204024698U - One retains gas drainage under suction structure - Google Patents

One retains gas drainage under suction structure Download PDF

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Publication number
CN204024698U
CN204024698U CN201420405078.7U CN201420405078U CN204024698U CN 204024698 U CN204024698 U CN 204024698U CN 201420405078 U CN201420405078 U CN 201420405078U CN 204024698 U CN204024698 U CN 204024698U
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CN
China
Prior art keywords
gas
curing area
coal seam
hole
outside
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201420405078.7U
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Chinese (zh)
Inventor
李希建
张鹏
岳乾
黄�良
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Guizhou University
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Guizhou University
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Publication date
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Priority to CN201420405078.7U priority Critical patent/CN204024698U/en
Application granted granted Critical
Publication of CN204024698U publication Critical patent/CN204024698U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses one and retain gas drainage under suction structure, it comprises ear drill site (4), ear drill site (4) there is injected hole (1) along coal seam tunneling direction, curing area (5) is provided with along injected hole (1) surrounding subterranean zone, coal seam, inner side, curing area (5) is provided with gas extraction hole inside curing area (3), and coal seam, curing area (5) outside is provided with gas extraction hole outside curing area (2); It is longer that the utility model solves the existing gas pumping technology extraction time, needs mash gas extraction amount large, easily cause gas exceeding limit and outstanding accident, is the problems such as gas control work brings inconvenience even dangerous.

Description

One retains gas drainage under suction structure
Technical field
The utility model belongs to gas discharge in mine technology, particularly relates to one and retains gas drainage under suction structure.
Background technology
Current gas pumping technology not only can reduce the gas emission in recovery process, and prevent gas exceeding limit and gather, pre-anti-gas explosion and coal and gas prominent accident, also can turn bane into boon, and the resource of gas as coal association developed.Therefore in the middle of the recovery activity being widely used in colliery.But, common gas pumping technology is when mash gas extraction, need to treat that draining coal seam gas concentration is reduced to below extraction safety standard and could continues exposed coal by whole, therefore need mash gas extraction amount larger, need the extraction time longer, extraction engineering quantity is large, simultaneously owing to lacking the effective barrier hindering Gas-Flow to minery territory in coal seam, in driving or exposed coal engineering, gas more easily breaks through wall, thus causes gas exceeding limit and outstanding accident; This control being coal mine gas brings inconvenience even dangerous.
Summary of the invention
The technical problems to be solved in the utility model: provide one to retain gas drainage under suction structure, make it in coal seam, to form curing area to play the effect stopping gas and firm coal petrography, longer to solve the existing gas pumping technology extraction time, need mash gas extraction amount large, easy initiation gas exceeding limit and outstanding accident are the problem that gas control work brings inconvenience even dangerous etc.
Technical solutions of the utility model:
One retains gas drainage under suction structure, it comprises ear drill site, and ear drill site has injected hole along coal seam tunneling direction, is provided with curing area along injected hole surrounding subterranean zone, inside curing area, coal seam is provided with gas extraction hole inside curing area, and outside curing area, coal seam is provided with gas extraction hole outside curing area.
The thickness of curing area is at 0.2-20 rice.
Injected hole is the concordant boring vertically distributed from top to bottom along coal seam tunneling direction, and drilling depth is 5-60 rice.
Inside curing area, outside gas extraction hole and curing area, gas extraction hole is the concordant boring vertically distributed from top to bottom along coal seam tunneling direction, and drilling depth is 5-60 rice.
The beneficial effects of the utility model:
The utility model overcomes the deficiencies in the prior art, adopt injected hole slip casting by the structure of formation curing area, part coal seam, coal-bed gas is separated extraction respectively, its key technology adopts slip casting formation curing area to be separated in coal seam to carry out gas drainage under suction, thus play effective reduction gas density and pressure fast, solidification coal seam, reduce the effect of the danger of Gas Outburst, and a large amount of time and the effect of workload can be saved, same structure and method is used constantly to solidify the coal seam of both sides, tunnel, outside curing area, gas drainage under suction work does not stop, can for coal seam outside curing area continues to draw out methane in tunnelling process, prevent gas outside curing area from too much infiltrating inside curing area, thus ensure that in tunnelling process, gas density and pressure do not reach dangerous values, and reinforce coal road both sides rib, reduce the danger of Gas Outburst, it is longer that the utility model solves the existing gas pumping technology extraction time, need mash gas extraction amount large, easy initiation gas exceeding limit and outstanding accident, for problems such as gas control work bring inconvenience even dangerous.
accompanying drawing illustrates:
Fig. 1 is the utility model structure schematic top plan view;
Fig. 2 is example structure schematic diagram.
detailed description of the invention:
One retains gas drainage under suction structure (see figure 1), it comprises ear drill site 4, ear drill site 4 there is injected hole 1 along coal seam tunneling direction, curing area 5 is provided with along injected hole 1 surrounding subterranean zone, the thickness of curing area 5 is at 0.2-20 rice, inside curing area 5, coal seam is provided with gas extraction hole 3 inside curing area, and outside curing area 5, coal seam is provided with gas extraction hole 2 outside curing area.Ear drill site 4 is arranged in side or two sides of digging laneway 6.
Injected hole 1 is the concordant boring vertically distributed from top to bottom along coal seam tunneling direction, and drilling depth is 5-60 rice, and boring is 0.5-5 rice with wall distance, and drilling hole amount is 1 to 40.
Inside curing area, outside gas extraction hole 3 and curing area, gas extraction hole 2 is the concordant boring vertically distributed from top to bottom along coal seam tunneling direction, and drilling depth is 5-60 rice.Inside curing area, outside gas extraction hole 3 and curing area, gas extraction hole 2 is 0.5-4 rice with the distance of injected hole.
Described retains gas drainage under suction structure, and its implementation method comprises the steps:
Step 1, the ear drill site 4 arranged in the side, tunnel 6 of carrying out tunneling or two sides play concordant boring that a row vertically distributes as injected hole 1 from top to bottom to tunneling direction, drilling depth 5-60m;
Step 2, to slip casting in injected hole 1, until injecting paste material fills up whole injected hole, until injecting paste material solidification after, a slice subterranean zone around injected hole 1 is condensed into curing area 5, curing area 5 coal seam of side, tunnel is divided into inside curing area with curing area outside two parts;
Step 3, with injected hole 1 in the same way, inside curing area identical with injected hole 1 with beating quantity outside curing area respectively inside curing area, gas extraction hole 2, degree of depth 5-60m outside gas extraction hole 3 and curing area, carries out the extraction work of gas; Wherein, the coal-bed gas concentration inside curing area and pressure reach below the value that extraction standard specifies, tunnel just can continue to tunnel forward.
Step 4, carry out gas pumping by gas extraction hole outside gas extraction hole inside curing area 3 and curing area 2, until coal-bed gas concentration inside curing area and pressure reach below extraction standard gauge definite value, outside curing area, gas drainage under suction operation duration draws out methane and does not stop; Make to use the same method and constantly solidify the coal seam of both sides, tunnel, outside curing area, gas drainage under suction work then can for coal seam outside curing area continues to draw out methane in tunnelling process, prevent gas outside curing area from too much infiltrating inside curing area, thus ensure that in tunnelling process, gas density and pressure do not reach dangerous values, and reinforce coal road both sides rib, reduce the danger of Gas Outburst.
Applicant, in certain colliery exposed coal engineering, is specifically implemented as follows (see figure 2):
1, when the lateral separation in tunnel and coal seam is 10 meters, a row hole drilling is vertically made a call to from top to bottom as injected hole 1 along tunnel direction of advance respectively at both sides, tunnel ear drill site 4, drilling hole amount is 20, is 2 meters apart from wall distance, and boring extends to be treated in exposed coal layer.
2, by slurries by injected hole 1 inject treat exposed coal layer, wait for injecting paste material solidification, will treat that a slice subterranean zone of inlet well outside in exposed coal layer is condensed into curing area 5, this curing area 5 will treat exposed coal layer be divided into inside curing area with curing area outside two parts.
3, with injected hole 1 parallel direction, the space, from being 0.5 meter, makes a call to two row hole drillings again in the both sides, curing area of injected hole 1, to be respectively inside curing area gas extraction hole 2 outside gas extraction hole 3 and curing area.Wherein, inside curing area, gas extraction hole 3 can gas fast inside extraction curing area, gas outside the lasting extraction curing area of gas extraction hole 2 outside curing area.
Inside curing area, gas density and pressure drop to below the safety standard value of regulation, just can carry out the work of exposed coal, because curing area 5 blocks the gas outside curing area, therefore the utility model said apparatus and implementation method can reduce Gas Outburst harm in exposed coal engineering, reduce gas emission and gas pressure.
It is strong that the utility model implements simple and practical property, can effectively reduce gas density and pressure fast, and play solidification coal seam, reduce the effect of the danger of Gas Outburst, and can a large amount of time and workload be saved, can be widely used in the middle of various control of coalmine gas work.

Claims (4)

1. one kind retains gas drainage under suction structure, it comprises ear drill site (4), it is characterized in that: ear drill site (4) has injected hole (1) along coal seam tunneling direction, curing area (5) is provided with along injected hole (1) surrounding subterranean zone, coal seam, inner side, curing area (5) is provided with gas extraction hole inside curing area (3), and coal seam, curing area (5) outside is provided with gas extraction hole outside curing area (2).
2. according to claim 1ly retain gas drainage under suction structure, it is characterized in that: the thickness of curing area (5) is at 0.2-20 rice.
3. one according to claim 1 retains gas drainage under suction structure, it is characterized in that: injected hole (1) is the concordant boring vertically distributed from top to bottom along coal seam tunneling direction, and drilling depth is 5-60 rice.
4. one according to claim 1 retains gas drainage under suction structure, it is characterized in that: inside curing area, outside gas extraction hole (3) and curing area, gas extraction hole (2) is the concordant boring vertically distributed from top to bottom along coal seam tunneling direction, and drilling depth is 5-60 rice.
CN201420405078.7U 2014-07-22 2014-07-22 One retains gas drainage under suction structure Expired - Fee Related CN204024698U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420405078.7U CN204024698U (en) 2014-07-22 2014-07-22 One retains gas drainage under suction structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420405078.7U CN204024698U (en) 2014-07-22 2014-07-22 One retains gas drainage under suction structure

Publications (1)

Publication Number Publication Date
CN204024698U true CN204024698U (en) 2014-12-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420405078.7U Expired - Fee Related CN204024698U (en) 2014-07-22 2014-07-22 One retains gas drainage under suction structure

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CN (1) CN204024698U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104074539B (en) * 2014-07-22 2016-05-11 贵州大学 One is held back gas drainage under suction structure and implementation method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104074539B (en) * 2014-07-22 2016-05-11 贵州大学 One is held back gas drainage under suction structure and implementation method thereof

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GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20141217

Termination date: 20200722

CF01 Termination of patent right due to non-payment of annual fee