CN106894827A - The method that gas is prevented and treated during coal face back production - Google Patents
The method that gas is prevented and treated during coal face back production Download PDFInfo
- Publication number
- CN106894827A CN106894827A CN201710193805.6A CN201710193805A CN106894827A CN 106894827 A CN106894827 A CN 106894827A CN 201710193805 A CN201710193805 A CN 201710193805A CN 106894827 A CN106894827 A CN 106894827A
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- China
- Prior art keywords
- grouting pipe
- coal
- gas
- back production
- drilling
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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.)
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- 239000003245 coal Substances 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 238000005553 drilling Methods 0.000 claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 25
- 238000002347 injection Methods 0.000 claims abstract description 19
- 239000007924 injection Substances 0.000 claims abstract description 19
- 238000005065 mining Methods 0.000 claims abstract description 8
- 239000003292 glue Substances 0.000 claims abstract description 7
- 238000010276 construction Methods 0.000 claims abstract description 6
- 239000006260 foam Substances 0.000 claims description 4
- 239000000084 colloidal system Substances 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims description 2
- 239000011435 rock Substances 0.000 description 9
- 238000000605 extraction Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 208000019901 Anxiety disease Diseases 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
A kind of method that gas is prevented and treated during the invention discloses coal face back production, is arranging drilling at the mined out region at hydraulic support shield beam rear, the position at interval of two or three hydraulic supports first；The first Grouting Pipe is laid between the front rod and column of several hydraulic supports again, a three-way connection is reserved in the corresponding position with drilling in the first Grouting Pipe, and installs branching hose, after whole constructions hole to be drilled are finished, branching hose is connected with drilling；Last pre-buried second Grouting Pipe on the non-coal mining side base plate of return airway, first Grouting Pipe is separated by the second Grouting Pipe threeway, and the first valve is set in connectivity part, start pressure injection colloidal materials when the second Grouting Pipe mouth of pipe enters goaf away from 5-8m of Air return corner, the first valve is opened simultaneously, to the first Grouting Pipe internal pressure glue injection body material, so circulate repeatedly.There is gas exceeding limit situation, the degree of safety of mine during improve back production during coal-face back production can be reduced in the present invention.
Description
Technical field
The present invention relates to the gas control technology field of coal mine work area, more particularly to a kind of coal face is returned
The method of the preventing and treating gas during adopting.
Background technology
The coal seam of high methane and the coal and gas outburst mine exploitation of China more than 95% belongs to low air permeability coal seam, gas
Extraction difficulty is big, extraction rate is low, simultaneously because comprehensive mechanical coal mining mining rate is big, the concentration of production, fltting speed are fast, is formed
Larger area goaf, assembles substantial amounts of gas.Coal-face gush out gas mine gas source in occupy very big ratio
Example.According to statistics, New Built Mine is gone into operation the initial stage, and coal-face is gushed out, and to account for whole Mine Gas Gushing sum-rate smaller for gas,
With the continuous increase of limit of mining, corresponding working face gas proportion of gushing out gradually is increasing, and particularly exploits the time limit
The coal-face of old mine, adjacent layer or thick seam slicing system more long gushes out gas up to 30-45%, a small number of mines
Up to 50-70%, even more greatly.The pouring out of coal-face gas frequently results in upper corner and return airway gas density is super
Limit, threatens mine safety and limits the raising of coal production.Especially high methane and coal and gas outburst mine, face upper corner angle
Gas exceeding limit problem is more prominent, has a strong impact on the efficiency of comprehensive mechanical coal mining, or even is also possible to lead to great serious accident,
Cause casualties, bring huge economic losses.
At present, the measure for coal-face gas preventing and control mainly has pre-buried pipeline method, high-order lane method, ground drilling
Method, High Position Drilling method and layer-through drilling method etc..These technologies serve certain effect to ensureing mine safety production, but by
In carrying out gas control on coal faces by landform, press, the factor such as ocurrence of coal seam state is influenceed, it is dense to there is extraction in these technologies
Degree is low, great in constructing amount, a series of shortcomings such as many that expend fund, and such as pre-buried pipeline method extraction rate is low, and the concentration of extraction generally only has
10~25%；High-order lane method and ground drilling method construction work amount are big, consuming fund is more；High Position Drilling method and layer-through drilling method are deposited
Long in the extraction time, anxiety etc. is taken in extraction.
Therefore the method for needing preventing and treating gas during providing a kind of new coal face back production badly is above-mentioned to solve
Problem.
The content of the invention
The technical problems to be solved by the invention prevent and treat the side of gas during being to provide a kind of coal face back production
, there is gas exceeding limit situation during coal-face back production can be reduced in method.
In order to solve the above technical problems, one aspect of the present invention is：A kind of coal face is provided
The method that gas is prevented and treated during back production, including several hydraulic supports of return airway, methods described are close to positioned at coal-face
Comprise the following steps：
(1) in the mined out region positioned at hydraulic support shield beam rear, the position at interval of two or three hydraulic supports
Place's arrangement drilling；
(2) lay the first Grouting Pipe between the front rod and column of several hydraulic supports, in the first Grouting Pipe with
A three-way connection is reserved in the corresponding position of drilling, and installs branching hose, after whole constructions hole to be drilled are finished, branch is soft
Pipe is connected with drilling；
(3) pre-buried second Grouting Pipe on the non-coal mining side base plate of return airway, the mouth of pipe of the second Grouting Pipe enters goaf
Interior, the first Grouting Pipe is separated by the second Grouting Pipe threeway, and sets the first valve in connectivity part, treats that the second Grouting Pipe mouth of pipe enters
Start pressure injection colloidal materials when goaf is away from 5-8m of Air return corner, while the first valve is opened, to the first Grouting Pipe internal pressure injecting glue
Body material；
(4) as the back production of coal-face is advanced, the second Grouting Pipe is outwards drawn with drawing hoist, treats the second Grouting Pipe
The mouth of pipe again apart from the 5-8m of Air return corner in goaf when start pressure injection colloidal materials, so circulation repeatedly.
In a preferred embodiment of the present invention, drilling and horizontal inclination angle are-10 °-10 °, and depth is 8-10m.
In a preferred embodiment of the present invention, the second valve, energy are provided with the three-way connection in the first Grouting Pipe
Enough pressure injections of control at any time enter the flow of the colloidal materials of each drilling.
Further, a diameter of 108mm of the first Grouting Pipe, a diameter of 150mm of the second Grouting Pipe.
In a preferred embodiment of the present invention, colloidal materials include MJPZ colloidal foam, gel.
The beneficial effects of the invention are as follows：The inventive method is simple, construction volume is small, cost is few, effect is good, in the normal back production phase
Between, you can corresponding region is arranged and is drilled, and in drilling internal pressure glue injection body material, by work face goaf pressure injection colloid material
Material, the hole of bashing fractured coal and rock or crack are integrated fractured coal and rock is cementing, block Gas passage,
And dense film is formed on its surface, and suppress Gas, there is gas exceeding limit situation during reducing coal-face back production, carry
The degree of safety of mine during back production high.
Brief description of the drawings
Fig. 1 is that the present invention arranges schematic diagram in the structure of coal-face；
Fig. 2 is the side view of Fig. 1；
The mark of each part is as follows in accompanying drawing：1st, bank, 2, goaf, 3, coal-face, 4, fractured coal and rock, 5,
Return airway, 6, hydraulic support, 61, back timber, 62, caving shield, 63, tail boom, 64, base, 65, column, 66, front rod, 7, drilling,
8th, the first Grouting Pipe, the 9, second Grouting Pipe, 10, three-way connection, the 11, first valve, the 12, second valve.
Specific embodiment
Presently preferred embodiments of the present invention is described in detail below in conjunction with the accompanying drawings, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, apparent is clearly defined so as to be made to protection scope of the present invention.
Fig. 1 and Fig. 2 is referred to, the embodiment of the present invention includes：
A kind of method that gas is prevented and treated during coal face back production, including positioned at coal-face 3 near return air
Several hydraulic supports 6 in lane 5, with reference to Fig. 2, the quantity of the hydraulic support 6 is 20-30, and it includes back timber 61 and top
The column 65 of the caving shield 62 of the connection of beam 61 and the tail boom 63 of the connection of caving shield 62, base 64, support base 64 and back timber 61,
The front rod 66 of support base 64 and caving shield 62, as illustrated, the position between bank 1 and goaf 2 is coal work
Face 3, the described method comprises the following steps：
(1) in the mined out region positioned at the rear of 6 caving shield of hydraulic support 62, at interval of two or three hydraulic supports 6
Drilling 7 is arranged at position, drilling 7 is-10 °-10 ° with horizontal inclination angle, and depth is 8-10m, it is convenient to goaf correspondence
Position is drilled；
(2) the first Grouting Pipe 8 is laid between 20-30 front rods of hydraulic support 6 66 and column 65, in the first note
A three-way connection 10 is reserved in corresponding position on slurry pipe 8 with drilling 7, and installs branching hose, and hole to be drilled 7 have all constructed
Bi Hou, branching hose is connected with drilling 7, to the internal pressure glue injection body material of the first Grouting Pipe 8；
Preferably, the second valve 12 is both provided with each three-way connection 10, convenient control pressure injection enters each drilling 7
The flow of colloidal materials.
(3) pre-buried second Grouting Pipe 9 on the non-coal mining side base plate of return airway 5, the mouth of pipe of the second Grouting Pipe 9 enters mined out
In area 2, the first Grouting Pipe 8 is separated by the threeway of the second Grouting Pipe 9, and connectivity part is provided with the first valve 11, is easy to control to press
Inject the flow of the colloidal materials of the first Grouting Pipe 8；When the mouth of pipe of the second Grouting Pipe 9 enters goaf away from 5-8m of Air return corner
Start pressure injection colloidal materials, while the first valve 11 is opened, to the internal pressure glue injection body material of the first Grouting Pipe 8；
(4) as the back production of coal-face 3 is advanced, the second Grouting Pipe 9 is outwards drawn with drawing hoist (such as institute in Fig. 1
Show the direction of arrow), hauling distance is identical with the advance distance of coal-face 3, treats the mouth of pipe of the second Grouting Pipe 9 again apart from goaf
Start pressure injection colloidal materials during 2 5-8m of Air return corner, that is, keep the mouth of pipe of the second Grouting Pipe 9 away from 5-8m of Air return corner apart from when
Just pressure injection colloidal materials immediately, so circulation are repeatedly.
In an embodiment of the present invention, a diameter of 108mm of the first Grouting Pipe 8, a diameter of 150mm of the second Grouting Pipe 9.
In above-mentioned steps, the colloidal materials of pressure injection include MJPZ colloidal foam, gel.The filling of MJPZ colloidal foam is adopted
The hole of dead zone fractured coal and rock or crack, expand in fractured coal and rock, permeate, forming network bone full of whole fissure-plane
Frame, is bonded together loose coal and rock, plays reinforcing effect, filling densification, has blocked Gas passage,
And dense film is formed on fractured coal and rock surface, and suppress Gas, effectively play the effect of preventing and treating gas.
The inventive method is simple, construction volume is small, cost is few, effect is good, during normal back production, you can to corresponding region cloth
Drilling is put, and in drilling internal pressure glue injection body material, by work face goaf pressure injection colloidal materials, bashing break up coal
The hole of rock mass or crack, are integrated fractured coal and rock is cementing, block Gas passage, and form dense thin on its surface
Film, suppresses Gas, and gas exceeding limit situation, the peace of mine during improve back production occur during reducing coal-face back production
Whole step.
Embodiments of the invention are the foregoing is only, the scope of the claims of the invention is not thereby limited, it is every to utilize this hair
Equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (5)
1. a kind of method that gas is prevented and treated during coal face back production, including positioned at coal-face near return airway
Several hydraulic supports, the described method comprises the following steps：
(1) in the cloth at the mined out region at hydraulic support shield beam rear, the position at interval of two or three hydraulic supports
Put drilling；
(2) the first Grouting Pipe is laid between the front rod and column of several hydraulic supports, with drilling in the first Grouting Pipe
Corresponding position reserve a three-way connection, and branching hose is installed, it is hole to be drilled after all construction is finished, by branching hose with
Drilling connection；
(3) pre-buried second Grouting Pipe on the non-coal mining side base plate of return airway, the mouth of pipe of the second Grouting Pipe enters in goaf, the
One Grouting Pipe is separated by the second Grouting Pipe threeway, and sets the first valve in connectivity part, treats that the second Grouting Pipe mouth of pipe enters mined out
Start pressure injection colloidal materials during offset 5-8m of Air return corner, while the first valve is opened, to the first Grouting Pipe internal pressure glue injection body material
Material；
(4) as the back production of coal-face is advanced, the second Grouting Pipe is outwards drawn with drawing hoist, treats the second Grouting Pipe mouth of pipe
Start pressure injection colloidal materials when again apart from the 5-8m of Air return corner in goaf, so circulate repeatedly.
2. the method that gas is prevented and treated during coal face back production according to claim 1, it is characterised in that drilling
It it is-10 °-10 ° with horizontal inclination angle, depth is 8-10m.
3. the method that gas is prevented and treated during coal face back production according to claim 1, it is characterised in that first
The second valve is provided with three-way connection in Grouting Pipe.
4. the method that gas is prevented and treated during the coal face back production according to claim 1 or 3, it is characterised in that
A diameter of 108mm of the first Grouting Pipe, a diameter of 150mm of the second Grouting Pipe.
5. the method that gas is prevented and treated during coal face back production according to claim 1, it is characterised in that colloid
Material includes MJPZ colloidal foam, gel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710193805.6A CN106894827A (en) | 2017-03-28 | 2017-03-28 | The method that gas is prevented and treated during coal face back production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710193805.6A CN106894827A (en) | 2017-03-28 | 2017-03-28 | The method that gas is prevented and treated during coal face back production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106894827A true CN106894827A (en) | 2017-06-27 |
Family
ID=59193528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710193805.6A Pending CN106894827A (en) | 2017-03-28 | 2017-03-28 | The method that gas is prevented and treated during coal face back production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106894827A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108180034A (en) * | 2017-12-28 | 2018-06-19 | 太原理工大学 | A kind of application process that coal mine gas at upper corner is administered based on aqueous vapor scroll fluid |
| CN113006848A (en) * | 2021-03-18 | 2021-06-22 | 华能煤炭技术研究有限公司 | Hydraulic supporting device |
| CN113339056A (en) * | 2021-06-24 | 2021-09-03 | 中国矿业大学 | Fluidized gangue layer surface subsequent filling system and method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108180034A (en) * | 2017-12-28 | 2018-06-19 | 太原理工大学 | A kind of application process that coal mine gas at upper corner is administered based on aqueous vapor scroll fluid |
| CN108180034B (en) * | 2017-12-28 | 2020-07-28 | 太原理工大学 | Application method for treating gas at upper corner of coal mine based on water-gas vortex fluid |
| CN113006848A (en) * | 2021-03-18 | 2021-06-22 | 华能煤炭技术研究有限公司 | Hydraulic supporting device |
| CN113339056A (en) * | 2021-06-24 | 2021-09-03 | 中国矿业大学 | Fluidized gangue layer surface subsequent filling system and method |
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| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170627 |
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| RJ01 | Rejection of invention patent application after publication |