CN106988778A - A kind of low preservation, the high three-dimensional administering method of the gas gushed out point source partition - Google Patents

A kind of low preservation, the high three-dimensional administering method of the gas gushed out point source partition Download PDF

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Publication number
CN106988778A
CN106988778A CN201710352013.9A CN201710352013A CN106988778A CN 106988778 A CN106988778 A CN 106988778A CN 201710352013 A CN201710352013 A CN 201710352013A CN 106988778 A CN106988778 A CN 106988778A
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gas
working
extraction
goaf
work
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CN201710352013.9A
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CN106988778B (en
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于斌
高瑞
匡铁军
孟祥斌
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Datong Coal Mine Group Co Ltd
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Datong Coal Mine Group Co Ltd
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F7/00Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose

Abstract

The present invention relates to ahead work face coal and rock rupture zone, working face and work face goaf during super high seam top coal caving, and the pumping method in neighbouring work face goaf different zones gas source, specially a kind of low preservation, the high three-dimensional administering method of the gas gushed out point source partition.Invent the low preservation, the three-dimensional administering method tool advantages below of the high gas gushed out point source partition:1)By the continuous mash gas pumping drilling of arrangement, gas pumping tunnel and move towards extraction borehole, extraction can be carried out to the gas in this ahead work face coal and rock rupture zone, this working face, this work face goaf different zones, at utmost reduce this face gas concentration;2)The invention can at any time to this working face deep goaf gas carry out extraction, overcome traditional extraction way can not this working face of extraction deep goaf gas deficiency.

Description

A kind of low preservation, the high three-dimensional administering method of the gas gushed out point source partition
Technical field
The present invention relates to ahead work face coal and rock rupture zone, working face and work during super high seam top coal caving Face goaf, and the pumping method adjacent to work face goaf different zones gas source, specially a kind of low preservation, height are gushed out The three-dimensional administering method of gas point source partition.
Background technology
Gas is the killer of colliery first, although coal mine gas explosion declines to a great extent year by year in recent years, but the proportion shared by it Still larger, particularly serious gas accident happens occasionally, and seriously constrains resource high-efficiency exploitation.Improvement at present for gas is main It is that based on pre-mining drainage, the Treatment process means can effectively reduce coal seam gas-bearing capacity in advance, reduce working face seam mining The gas exceeding limit frequency afterwards, current technology is the technical way that gas is administered in colliery.Though and China some areas coal seam Gas bearing content is low, but seam mining intensity is big, working face layout is high, now using the advanced technological means extraction effect taken out in advance Really poor, this is resulted in when gas large area parsing release in coal seam during the high tension coal mining of coal seam, and face gas, which transfinites, asks Topic is protruded, and great hidden danger is caused to mine safety production.
By taking the Tashan Mountain colliery of China Datong Mine Area as an example, tunnel passing through solution cavity in Taishan mine is typical super high seam present low gas occurrence condition, main coal mining Layer average thickness 15.47m, gas bearing capacity 2.0m3/t(Standard after far smaller than national gas drainage under suction), using mining Exploitation, the Full-mechanized Mining Face daily output is up to 4~50,000 tons.Seam mining causes coal petrography to move on a large scale, is adopting and coal body watt Under this pressure combined influence, mining-induced fissure field is superimposed with initial fissure, and gas appearance is unordered to be gathered, gushes out, and causes present low gas Coal seam gushes out in recovery process massive gas, and Gas is up to 50m3/min.Because gas bearing concentration is low, difficulty is taken out in advance Greatly, but fast by being parsed after mining influence, outburst amount is high, causes the improvement of " present low gas preservation, high gas emission " extremely difficult.
Therefore, need to be furtherd investigate and controlled for the gas control under the conditions of such, this safety to working face Efficiently production has great importance.Gas " low preservation, height are gushed out " problem that the present invention is brought for coal seam high tension coal mining, A kind of low preservation, the high three-dimensional administering method of the gas gushed out point source partition are provided, by being disposed vertically downward continuously from ground Mash gas pumping drilling, in face roof arrangement gas pumping tunnel, moves towards extraction borehole and carrys out extraction ahead work face coal and rock The gas source of the different enrichment regions of rupture zone, working face, goaf and vertical direction, and it is vertical from neighbouring working face earth's surface arrangement Mash gas pumping drilling carries out mash gas extraction, while underground carries out note nitrogen to neighbouring goaf, reaches to neighbouring goaf gas source Extraction.This point of source partition gas pumping technical system can at utmost reduce gas density, reach control effect.
The content of the invention
There is provided one kind for problem in order to solve the gas in super high seam top coal caving " low preservation, height are gushed out " by the present invention Low preservation, the high three-dimensional administering method of the gas gushed out point source partition, advantageously ensure that the safe working in colliery.
The present invention is achieved by the following technical solutions:A kind of low preservation, the high gas gushed out point source partition solid are controlled Reason method, comprises the following steps:
A. it is disposed vertically downward continuous first gas of a row from earth's surface in this working face mining forward position this advance of the face direction Extraction borehole, according to this advance of the face position, at least ensures three the first mash gas pumping drillings to this working face bottom Work simultaneously, respectively to this close work in this ahead work face coal and rock burst region, this working face and this work face goaf Make in these three regions of face region, at least close to this in this ahead work face coal and rock burst region and this work face goaf The gas in the two regions of working face region carries out extraction;
B. neighbouring this working face goaf gas source is directed to, if being disposed vertically downward first from neighbouring this work face goaf earth's surface The second gas is opened to neighbouring this work face goaf position in dry second mash gas pumping drilling, the second mash gas pumping drilling bottom Extraction borehole is to extraction state, while from the return airway arrangement drilling note nitrogen pipeline of this working face to neighbouring this work face goaf It is interior, note nitrogen is carried out to neighbouring this work face goaf by the note nitrogen pipeline that drills, the gas of neighbouring this work face goaf is realized Gas pumping is replaced and leaves, the extraction of this working face and its neighboring area and neighbouring this working face goaf gas is in level side To realizing point source partition extraction of different zones gas;
C. in the range of this face roof caving zone, gas pumping tunnel is arranged parallel to this advance of the face direction, to this Gas in the range of working face caving zone carries out extraction;
D. in the range of this face roof fissure zone, mash gas pumping drilling is moved towards parallel to this advance of the face direction arrangement, Extraction is carried out to the gas in the range of this working face fissure zone, the extraction of caving zone and fissure zone gas is realized in vertical direction Point source partition of different rich region gas is administered, and three-dimensional gas point source point is together form with horizontal direction gas pumping arrangement Area administers system;
If e. find that gas density is higher in this working face and its neighboring area in recovery process, more, even institute is opened Some mash gas pumping drillings, while increasing the note nitrogen quantity of drilling note nitrogen pipeline;
F. using this pumping method until this working face extraction terminates, during next neighbouring working face mining, using same improvement Method carries out extraction to the gas source of next neighbouring working face different zones, leaves gas source for this work face goaf, together Sample notes nitrogen by using underground, and the method for the second mash gas pumping drilling extraction is administered.
Low preservation of the present invention, the three-dimensional administering method tool advantages below of the high gas gushed out point source partition:1)Pass through cloth The continuous mash gas pumping drilling put, gas pumping tunnel and extraction borehole is moved towards, this ahead work face coal and rock can be ruptured Area, this working face, the gas in the different zones of this work face goaf carry out extraction, at utmost reduce this face gas Concentration;2)The invention can carry out extraction to this working face deep goaf gas at any time, and overcoming traditional extraction way can not take out Adopt the deficiency of this working face deep goaf gas;3)Overlying strata cranny development after seam mining, as vertical drilling and the neighbour of arrangement After nearly this working face overburden of the goaf crack is linked up, this working face extraction borehole can enter to neighbouring working face goaf gas simultaneously Row extraction, the mash gas pumping drilling arranged in addition adjacent to this work face goaf etc., substantially increase this neighbouring working face mined out Area's gas pumping effect, reduces neighbouring influence of this working face goaf gas source to this working face;4)That continuously arranges hangs down Straight extraction borehole, gas pumping tunnel and move towards extraction borehole and can at any time be regulated and controled according to Gas situation, using convenient, Extraction efficiency high, it is ensured that the safety and high efficiency of working face, has a extensive future.
Brief description of the drawings
Fig. 1 is the arrangement schematic diagram of administering method of the present invention.
Fig. 2 is Fig. 1 A-A sectional views.
In figure:This working face of 1-, the mash gas pumping drillings of 2-1 first, the mash gas pumping drillings of 2-2 second, 3- this working face coals Layer, this work of 4- face goaf, 5- is adjacent to this work face goaf, 6- drilling note nitrogen pipelines, 7- gas pumpings tunnel, 8- trends Extraction borehole, 9- return airways, 10- air intake lanes.
Embodiment
Below by taking the gas pumping that Datong Mine Area super high seam is exploited as an example, present invention work is further retouched with reference to accompanying drawing State:
50m is spaced vertically downward from earth's surface in the exploitation direction of propulsion of this working face of forward position 1 of this working face 1 arrange that a row is continuous first The first mash gas pumping drilling 2-1 to the bottom of this working face coal seam 3, the length 200m of this working face 1, the thickness of this working face coal seam 3 20m, the first mash gas pumping drilling 2-1 and return airway 9 promote position according to this working face 1, at least ensure three apart from for 50m First mash gas pumping drilling 2-1 works simultaneously, respectively to the advanced coal and rock burst region of this working face 1, this working face 1 and this work Make in face goaf 4 in these three regions of the region of this working face 1, at least the advanced coal and rock burst region of this working face 1 Extraction is carried out with the gas in this work face goaf 4 close to the two regions of region of this working face 1.
It is so-called in the present invention " respectively to the advanced coal and rock burst region of this working face 1, this working face 1 and this working face In goaf 4 in these three regions of the region of this working face 1, at least the advanced coal and rock burst region of this working face 1 and this Gas in work face goaf 4 close to the two regions of region of this working face 1 carries out extraction " refer to due to this working face 1 Peak width be likely lower than the first mash gas pumping drilling 2-1 spacing(As shown in Figure 1), in order at utmost reduce this work Make in the gas density of face 1, the advanced coal and rock burst region of this working face 1 and this work face goaf 4 close to the region of this working face 1 It is working condition to have at least one first mash gas pumping drilling 2-1 respectively;If if thering is the first gas to take out just in this working face 1 Borehole 2-1, then open first mash gas pumping drilling 2-1;If if just without the first mash gas pumping drilling in working face 1 2-1, then the working quantity of the first mash gas pumping drilling 2-1 in two other region can be increased according to gas source concentration.
For the adjacent work gas source of face goaf 5, first from the neighbouring earth's surface of this work face goaf 5 cloth vertically downward Put the second mash gas pumping drilling 2-2, the second mash gas pumping drilling 2-2 bottoms open the to the adjacent work position of face goaf 5 Two mash gas pumping drilling 2-2 are to extraction state, while noting nitrogen pipeline 6 to adjacent to this from the arrangement drilling of return airway 9 of this working face 1 Work in face goaf 5, note nitrogen is carried out to neighbouring this work face goaf 5 by the note nitrogen pipeline 6 that drills, neighbouring goaf is realized 5 gas displacement and gas pumping is left, this working face 1 and its neighboring area(Including the advanced coal and rock rupture zone of this working face 1 Close to the two regions of the region of this working face 1 in domain and this work face goaf 4)With neighbouring this work face goaf 5 gas Extraction realizes point source partition extraction of different zones gas in the horizontal direction.
In the range of the roof collapse band of this working face 1, gas pumping tunnel 7 is arranged parallel to the direction of propulsion of this working face 1, To the gas progress extraction in the range of the caving zone of this working face 1, the horizontal range of gas pumping tunnel 7 and return airway 9 is 20m; In the range of the roof fracture band of this working face 1, mash gas pumping drilling 8 is moved towards parallel to the direction of propulsion of this working face 1 arrangement, to this Gas in the range of the fissure zone of working face 1 carries out extraction, and the horizontal range for moving towards extraction borehole 8 and return airway 9 is 40m, trend Extraction borehole 8 arranges that the extraction of caving zone and fissure zone gas is realized not in vertical direction using underground concordant high drainage roadway Point source partition with rich region gas is administered, and three-dimensional gas point source partition is together form with horizontal direction gas pumping arrangement Improvement system.
If find that gas density is higher in this working face 1 and its neighboring area in recovery process, open more, even All mash gas pumping drillings, while increasing the note nitrogen quantity of drilling note nitrogen pipeline 6.
Using this pumping method until the back production of this working face 1 terminates, during next neighbouring working face mining, controlled using same Reason method carries out extraction to the gas source of next neighbouring working face different zones(Now next neighbouring working face becomes cost working face 1), gas source is left for this work face goaf 4(Now this work face goaf 4 becomes adjacent work face goaf 5), Nitrogen is noted again by using underground, the method for the second mash gas pumping drilling 2-2 extractions is administered.
Above-mentioned technical proposal it is targeted be the exploitation of Datong Mine Area super high seam gas pumping, but skill of the present invention Art scheme is never only only applicable to the seam mining.Those skilled in the art can be according to specific coal seam thickness and coal-bed gas The factors such as preservation content, adjust above-mentioned parameter(Such as distance or quantity)Setting.
Specifically, adjacent first mash gas pumping drilling 2-1 distance is relevant with coal seam thickness and coal-bed gas preservation content, Typically take 40 ~ 80m;Certainly, if gas bearing content is high, apart from short;If gas bearing content, distance.
During concrete application, the plan-position of the first mash gas pumping drilling 2-1 arrangements is close to the return airway 9 of working face 1, with return air Lane 9 is apart from 1/4 for the length of working face 1.
Further, the horizontal range of gas pumping tunnel 7 and return airway 9 is 15 ~ 25m, positioned at the cover rock caving of working face 1 Band scope.
Further, the horizontal range for moving towards extraction borehole 8 and return airway 9 is generally 30 ~ 50m, positioned at the overlying strata of working face 1 Fissure zone scope, underground concordant high drainage roadway or the drilling of ground L-type can be arranged by moving towards extraction borehole 8.
The present invention is when it is implemented, gas pumping tunnel 7 and moving towards extraction borehole 8 and being exported by air return system to earth's surface.
In the present invention, this described working face deep goaf refers to that this working face away from this working face 1 is mined out The region of area 4.When it is implemented, extraction can be carried out to this working face deep goaf gas at any time, traditional extraction way is overcome Can not this working face of extraction deep goaf gas deficiency.
Above-described embodiment, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect Describe in detail, should be understood that the embodiment that the foregoing is only the present invention, be not intended to limit the present invention Protection domain, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc. all should be included Within protection scope of the present invention.

Claims (6)

1. a kind of low preservation, the high three-dimensional administering method of the gas gushed out point source partition, it is characterised in that comprise the following steps:
A. in this working face(1)Exploit this working face of forward position(1)Direction of propulsion is disposed vertically downward a row continuous from earth's surface One mash gas pumping drilling(2-1)To this working face coal seam(3)Bottom, according to this working face(1)Position is promoted, at least ensures three First mash gas pumping drilling(2-1)Work simultaneously, respectively to this working face(1)Advanced coal and rock burst region, this working face(1) With this work face goaf(4)This interior close working face(1)In these three regions of region, at least this working face(1)Advanced coal Rock masses fracturing region and this work face goaf(4)This interior close working face(1)The gas in the two regions of region carries out extraction;
B. it is directed to neighbouring this work face goaf(5)Gas source, first from neighbouring this work face goaf(5)Earth's surface is vertically downward Arrange some second mash gas pumping drillings(2-2), the second mash gas pumping drilling(2-2)Bottom to neighbouring this work face goaf (5)Position, opens the second mash gas pumping drilling(2)To extraction state, while from this working face(1)Return airway(9)Arrangement is bored Note nitrogen pipeline in hole(6)To neighbouring this work face goaf(5)It is interior, pass through the note nitrogen pipeline that drills(6)It is mined out to this neighbouring working face Area(5)Note nitrogen is carried out, neighbouring this work face goaf is realized(5)Gas displacement and leave gas pumping, this working face(1)And Its neighboring area and neighbouring this work face goaf(5)The extraction of gas realizes point source of different zones gas in the horizontal direction Subregion extraction;
C. in this working face(1)In the range of roof collapse band, parallel to this working face(1)Direction of propulsion arrangement gas pumping tunnel (7), to this working face(1)Gas in the range of caving zone carries out extraction;
D. in this working face(1)In the range of roof fracture band, parallel to this working face(1)Direction of propulsion arrangement moves towards gas pumping Drilling(8), to this working face(1)Gas in the range of fissure zone carries out extraction, and the extraction of caving zone and fissure zone gas is being hung down Nogata is administered to point source partition for realizing different rich region gas, together form with horizontal direction gas pumping arrangement vertical Body gas point source partition administers system;
If e. finding this working face in recovery process(1)And in its neighboring area when gas density is higher, open more, even All mash gas pumping drillings, while increasing drilling note nitrogen pipeline(6)Note nitrogen quantity;
F. using this pumping method until this working face(1)Back production terminates, and during next neighbouring working face mining, is controlled using same Reason method carries out extraction to the gas source of next neighbouring working face different zones, for this work face goaf(4)Leave gas Source, nitrogen, the second mash gas pumping drilling are noted again by using underground(2-2)The method of extraction is administered.
2. a kind of low preservation according to claim 1, the high three-dimensional administering method of the gas gushed out point source partition, its feature exist In adjacent first mash gas pumping drilling(2-1)Distance be 40 ~ 80m.
3. a kind of low preservation according to claim 1, the high three-dimensional administering method of the gas gushed out point source partition, its feature exist In the first mash gas pumping drilling(2-1)The plan-position of arrangement is close to working face(1)Return airway(9), with return airway(9)Distance For working face(1)The 1/4 of length.
4. a kind of low preservation according to claim 1, the high three-dimensional administering method of the gas gushed out point source partition, its feature exist In gas pumping tunnel(7)With return airway(9)Horizontal range be 15 ~ 25m.
5. a kind of low preservation according to claim 1, the high three-dimensional administering method of the gas gushed out point source partition, its feature exist In moving towards extraction borehole(8)With return airway(9)Horizontal range be 30 ~ 50m.
6. a kind of low preservation according to claim 5, the high three-dimensional administering method of the gas gushed out point source partition, its feature exist In moving towards extraction borehole(8)It is arranged as underground concordant high drainage roadway or the drilling of ground L-type.
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CN110043309B (en) * 2019-05-29 2020-07-28 中国煤炭地质总局勘查研究总院 Arrangement method for closing gas extraction well of coal mine and well body installation method

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