CN103758560A - Method for gas treatment in multiple progressive protection seam grouping regions - Google Patents

Method for gas treatment in multiple progressive protection seam grouping regions Download PDF

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CN103758560A
CN103758560A CN201410014542.4A CN201410014542A CN103758560A CN 103758560 A CN103758560 A CN 103758560A CN 201410014542 A CN201410014542 A CN 201410014542A CN 103758560 A CN103758560 A CN 103758560A
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coal seam
seam
coal
layer
rock tunnel
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CN103758560B (en
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蒋静宇
郭海军
程远平
金侃
王伟
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China University of Mining and Technology CUMT
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Abstract

Disclosed is a method for gas treatment in multiple progressive protection seam grouping regions. The method is applicable to outburst removal and safe mining of outburst coal seam regions under short-distance highly-gassy coal seam group conditions. According to occurrence characteristics of short-distance highly-gassy outburst coal seam groups, minable coal seam groups are divided into an upper coal seam group, a middle coal seam group and a lower coal seam group, the middle coal seam group is taken as a key protection-seam coal seam group, the upper coal seam group and the lower coal seam group are taken as protected-seam coal seam groups, and the upper coal seam group and the lower coal seam group of the protected seam-coal seam groups are protected in a multiple progressive manner. A mining sequence of the three coal seam groups is from the middle coal seam group, the upper coal seam group to the lower coal seam group. In each group, coal seams are mined sequentially from top to bottom. Pressure relief gas of protected seams is extracted by roof and floor rock drift seam-penetrating drilling, the purposes of three-dimensional gas extraction and regional elimination of outburst danger are achieved, and the method can be used for gas treatment of short-distance coal seam groups including three or more coal seams. The method is simple and easy to implement, short in construction period, safe and efficient, and low in cost.

Description

A kind of multiple topping packet zone mash gas harnessing method that goes forward one by one
Technical field
The present invention relates to the exploitation of a kind of topping and mash gas harnessing method, especially a kind of multiple topping packet zone mash gas harnessing method that goes forward one by one that is applicable under high gas layer group condition closely, realizes the extinction of projecting coal bed region and safe working.
Background technology
Gas is one of principal element of serious threat Safety of Coal Mine Production, more than 70% is gas accident in the Coal Accidents of China.At present China's pit mining presents that mining depth is large, complex geologic conditions, gas permeability of coal seam is low, gas pressure is high, gas bearing capacity is taken out the features such as coal-bed gas difficulty greatly, in advance, adding most of working seam belongs to coal seam group with near interval and composes and to deposit, to be subject to mining influence, upper and lower adjacent coal seam group, by a large amount of gas pressure reliefs of gushing out to goaf at short notice, will produce coal and Gas Outburst under certain condition.
In coal and gas burst accident, exploitation dangerous seam with potential, simultaneously upper and lower adjacent layer is to be easier to occur while having the coal seam of outburst hazard or high gas layer.At present, the method for mining of closed distance coal seam group topping is generally to select the method for multiple release from top to bottom, or exploit as crucial topping in some coal seams using centre.But; under coal seam group with near interval condition; gas flow field belongs to ball to flow field; can be endlessly to mined bed or its goaf supply gas under gas pressure gradient effect; the outburst danger that effectively reduces single topping coal seam under coal seam group condition is more difficult, the dangerous existence as the same of coal and Gas Outburst.
Summary of the invention
Technical problem: the object of the invention is to overcome the deficiency in prior art, a kind of simple, multiple topping packet zone mash gas harnessing method that goes forward one by one that the duration is short, safe and efficient and with low cost is provided.
Technical scheme: the multiple topping packet zone mash gas harnessing method that goes forward one by one of the present invention, comprises the steps:
A. according to closely high Coal Seam Prone To Outburst group occurrence characteristics and < < topping production technique standard > >, minable coal seam is divided into San Ge coal seam, upper, middle and lower group, in selection, coal seam group is as crucial topping coal seam group, Zu Hexia coal seam, upper coal seam group is as protected seam coal seam group, coal seam group in first exploiting, exploit again upper coal seam group, the lower coal seam of finally exploitation group, each coal seam of each coal seam group is exploitation successively from top to bottom all;
B. in exploitation before the first coal seam of coal seam group, the position of last the seat earth 15 ~ 25m of coal seam group in distance of elder generation, construction driving group floor rock tunnel, a middle coal seam, with rig, in the first middle coal direction construction of Nei Xiangzhong coal seam, group floor rock tunnel, middle coal seam group, be many middle coal seam group layer-through drillings of fan-shaped distribution, middle coal seam group layer-through drilling passes each coal seam of middle coal seam group, and penetrates the first seam roof 0.5m of middle coal seam group;
C. in distance, group floor rock tunnel, coal seam is gone up in one of the position of last seat earth 15 ~ 25m of coal seam group construction, with rig in group floor rock tunnel, upper coal seam upwards the first coal seam direction construction of coal seam group be coal seam group layer-through drilling on many of fan-shaped distribution, upper coal seam group layer-through drilling passes each coal seam of upper coal seam group, and penetrates the top board 0.5m of coal seam group;
D. the position of last seat earth 15 ~ 25m of coal seam group construction group floor rock tunnel, a lower coal seam under distance, many lower coal seam groups that are fan-shaped distribution with rig first coal seam direction construction of coal seam group downwards in group floor rock tunnel, lower coal seam are worn the boring of group layer, lower coal seam group layer-through drilling passes each coal seam of lower coal seam group, and penetrates the top board 0.5m of lower coal seam group;
E. connect routinely extraction pipe network, middle coal seam group layer-through drilling in group floor rock tunnel, centering coal seam carries out original gas pre-drainage and adopts, region eliminate in after the first Coal Outburst danger of coal seam group, first exploit the first coal seam of group, middle coal seam of crucial topping, and by the gas pressure relief in Zu Zhongge coal seam, coal seam in the middle coal seam group layer-through drilling extraction in group floor rock tunnel, middle coal seam;
F. each coal seam in the group of coal seam in exploitation in order, the simultaneously gas pressure relief in the Zu Neige coal seam, upper coal seam by the upper coal seam group layer-through drilling extraction protected seam in group floor rock tunnel, upper coal seam; And by the gas pressure relief in the Zu Neige coal seam, lower coal seam of protected seam under the lower coal seam group layer-through drilling extraction in group floor rock tunnel, lower coal seam;
G. after the group back production of middle coal seam finishes, back production is carried out in each coal seam in the group of upper coal seam, then back production is carried out in each coal seam in the group of lower coal seam, back production is carried out to simultaneously in each coal seam, gas pumping release is carried out in unquarried each coal seam.
Described upper coal seam group layer-through drilling, middle coal seam group layer-through drilling and lower coal seam group worn whole process in the boring of group layer steel sleeve protection is installed, and at steel sleeve, through fragment position place, region, coal seam, all stamps sieve aperture; Each coal seam group in described San Ge coal seam, upper, middle and lower group includes 2-5 minable coal seam; In each coal seam group, in floor rock tunnel, the whole pitch of holes of respectively holing of construction is 25 ~ 35m; The high 3m of being in floor rock tunnel constructing below each coal seam group, wide is 4m.
Beneficial effect: owing to having adopted such scheme, the coal seam group with near interval that the present invention is applicable to comprise three or more coal seams is implemented gas control, compared with prior art: can realize the multiple protection of going forward one by one to protected coal seam group, effectively stop adjacent coal seam group gas supply working seam gas amount, realized protected coal seam group's minute source extraction and the three-dimensional extraction of associating; Middle coal seam group is considered as whole as crucial topping on existing topping exploitation and gas pumping method basis; and combine and arrange group floor rock tunnel, coal seam and layer-through drilling; multiple the go forward one by one protection of realization to protected coal seam group; reduced stone head engineering quantity; improve gas pumping efficiency, realized coal and gas safety is efficiently adopted altogether.Be particularly useful under high gas layer group condition closely, can realize the gas control of the multiple topping packet zone of going forward one by one of the extinction of projecting coal bed region and safe working.Its method is simple, and the duration is short, safe and efficient, with low cost, has practicality widely.
Accompanying drawing explanation
Fig. 1 is the multiple topping packet zone mash gas harnessing method schematic diagram that goes forward one by one of the present invention.
In figure: the group of A-upper coal seam; B-middle coal seam group; C-lower coal seam group; 1,2,3,4,5,6,7,8-coal seam; Group floor rock tunnel, 9-upper coal seam; Group floor rock tunnel, 10-middle coal seam; Group floor rock tunnel, 11-lower coal seam; 12-upper coal seam group layer-through drilling; Group layer-through drilling in coal seam in 13-; Group layer-through drilling in coal seam under 14-.
The specific embodiment
Below in conjunction with accompanying drawing, one embodiment of the present of invention are further described:
The multiple topping packet zone mash gas harnessing method that goes forward one by one of the present invention, concrete steps are as follows:
A. according to closely high Coal Seam Prone To Outburst group occurrence characteristics and < < topping production technique standard > >, minable coal seam is divided into, in, lower three coal seam groups, each coal seam group includes 2-5 minable coal seam, in selection, group B in coal seam is as crucial topping coal seam group, upper coal seam group A and lower coal seam group C are as protected seam coal seam group, coal seam group B in first exploiting, exploit again upper coal seam group A, the lower coal seam group C of finally exploitation, each coal seam of each coal seam group is exploitation successively from top to bottom all,
B. in exploitation before the first coal seam of coal seam group B, the position of last the seat earth 15 ~ 25m of coal seam group B in distance of elder generation, one of construction driving is high is 3m, wide is the group floor rock tunnel, middle coal seam 10 of 4m, with rig, in group floor rock tunnel, middle coal seam 10, the interior construction of the first coal seam direction to middle coal seam group B is many middle coal seam group layer-through drillings 13 of fan-shaped distribution, the whole pitch of holes of each boring is 25 ~ 35m, middle coal seam group layer-through drilling 13 passes each coal seam of middle coal seam group B, and penetrates the first seam roof 0.5m of middle coal seam group B; The interior omnidistance steel sleeve protection of installing of middle coal seam group layer-through drilling 13, all stamps sieve aperture at steel sleeve through fragment position place, region, coal seam;
C. in distance one of the position of last seat earth 15 ~ 25m of coal seam group A construction high be 3m, wide is the group floor rock tunnel, upper coal seam 9 of 4m, with rig in group floor rock tunnel, upper coal seam 9 upwards the first coal seam direction construction of coal seam group A be coal seam group layer-through drilling 12 on many of fan-shaped distribution, the whole pitch of holes of each boring is 25 ~ 35m, upper coal seam group layer-through drilling 12 passes each coal seam of upper coal seam group A, and penetrates the first roof 0.5m of coal seam group A; The interior omnidistance steel sleeve protection of installing of upper coal seam group layer-through drilling 12, all stamps sieve aperture at steel sleeve through fragment position place, region, coal seam;
D. under distance one of the position of last seat earth 15 ~ 25m of coal seam group C construction high be 3m, wide is the group floor rock tunnel, lower coal seam 11 of 4m, by many lower coal seam groups that rig is fan-shaped distribution in the construction of the first coal seam of group floor rock tunnel, lower coal seam 11 interior downward coal seam group C direction, wear group layer boring 14, the whole pitch of holes of each boring is 25 ~ 35m, lower coal seam group layer-through drilling 14 passes each coal seam of lower coal seam group C, and penetrates the first roof 0.5m of lower coal seam group C; Lower coal seam group is worn the interior omnidistance steel sleeve protection of installing of group layer boring 14, at steel sleeve, through fragment position place, region, coal seam, all stamps sieve aperture;
E. connect routinely extraction pipe network, middle coal seam group layer-through drilling 13 in group floor rock tunnel, centering coal seam 10 carries out original gas pre-drainage and adopts, region eliminate in after the first Coal Outburst danger of coal seam group B, first exploit the first coal seam of the middle coal seam group B of crucial topping, and by the gas pressure relief in each coal seam in coal seam group B in middle coal seam group layer-through drilling 13 extractions in group floor rock tunnel, middle coal seam 10;
F. each coal seam in the group B of coal seam in exploiting in order, simultaneously by the gas pressure relief in each coal seam in the upper coal seam group A of the upper coal seam group layer-through drilling 12 extraction protected seams in group floor rock tunnel, upper coal seam 9; And by the gas pressure relief in each coal seam in the lower coal seam group C of protected seam under lower coal seam group layer-through drilling 14 extractions in group floor rock tunnel, lower coal seam 11;
G. after the group B back production of middle coal seam finishes, back production is carried out in each coal seam in upper coal seam group A, then back production is carried out in each coal seam in lower coal seam group C, back production is carried out to simultaneously in each coal seam, gas pumping release is carried out in unquarried each coal seam.
As shown in Figure 1; the coal seam group with near interval that comprises eight coal seams of take is example: eight coal seam group with near intervals are divided into San Ge coal seam, upper, middle and lower group; using middle coal seam group B as crucial topping coal seam group; and respectively at upper coal seam group A, middle coal seam group B and group C bottom, lower coal seam construction floor rock tunnel combined optimization and layout layer-through drilling; coal seam group B under coal seam group A and protected seam on protected seam is realized to go forward one by one protection and the multiple protective in coal seam in the group of coal seam; thereby coal seam group with near interval coal is eliminated in region and Gas Outburst is dangerous, and concrete steps are as follows:
A. according to closely high Coal Seam Prone To Outburst group occurrence characteristics and topping guard space and effect, by minable coal seam people for being divided into upper coal seam group A, middle coal seam group B and lower coal seam group C, in selection, group B in coal seam is as crucial topping, coal seam group C under coal seam group A and lower protected seam on the upper protected seam of the protection of going forward one by one, coal seam group mining is sequentially middle coal seam group B, upper coal seam group A and lower coal seam group C, all exploits each coal seam in the group of coal seam from top to bottom;
B. in exploitation before the first coal seam 4 of coal seam group B, in distance, the position of the 3rd coal seam 6 base plate 15 ~ 25m of coal seam group B construction driving height is 3m, wide is the group floor rock tunnel, middle coal seam 10 of 4m, in group floor rock tunnel, middle coal seam 10, utilize rig to coal seam group layer-through drilling 13 in the first coal seam 4 of middle coal seam group B, the second coal seam 5 and the 3rd coal seam 6 construction 90~100mm, middle coal seam group boring 13 penetrates middle coal seam group B the first coal seam 4 top board 0.5m, and the whole pitch of holes of middle coal seam group boring 13 is 25 ~ 35m;
C. then in distance, the position of the 3rd coal seam 3 base plate 15 ~ 25m of coal seam group A construction driving height is 3m, wide is the group floor rock tunnel, upper coal seam 9 of 4m, in group floor rock tunnel, upper coal seam 9, utilize rig make progress the first coal seam 1, the second coal seam 2 and the 3rd coal seam 3 construction upper coal seam of the 90~100mm group layer-through drillings 12 of coal seam group A, upper coal seam group boring 12 penetrates the first coal seam 1 top board 0.5m of coal seam group A, and the whole pitch of holes of upper coal seam group boring 12 is 25 ~ 35m.
D. then under distance, the position of second coal seam 8 base plate 15 ~ 25m of coal seam group C construction driving height is 3m, wide is the group floor rock tunnel, lower coal seam 14 of 4m, in group floor rock tunnel, lower coal seam 14, utilize coal seam group layer-through drilling 14 under the first coal seam 7 of the downward coal seam of rig group C and the second coal seam 8 construction 90~100mm, lower coal seam group boring 14 penetrates lower coal seam group C coal seam 7 top board 0.5m, the whole pitch of holes 25 ~ 35m of lower coal seam group boring 14;
E. the layer-through drilling 13 in utilizing in group floor rock tunnel, coal seam 10 is drawn the original gas in coal seam group B the first coal seam 4 in advance, region eliminate in after the outburst danger in group B the first coal seam 4, coal seam, first exploit the first coal seam 4 of group B in coal seam in crucial topping, the second coal seam 5 of coal seam group B and the gas pressure relief in the 3rd coal seam 6 in layer-through drilling 13 extractions in simultaneously utilizing in group floor rock tunnel, coal seam 10;
F. each coal seam of coal seam group B in exploiting successively from top to bottom in order, utilize upper coal seam group layer-through drilling 12 in group floor rock tunnel, upper coal seam 9 gas pressure relief in the first coal seam 1, the second coal seam 2 and the 3rd coal seam 3 in the group A of coal seam that goes forward one by one in extraction on protected seam coal seam group simultaneously, and utilize the first coal seam 7 of the lower coal seam group C of protected seam under lower coal seam group layer-through drilling 14 extractions in group floor rock tunnel, lower coal seam 11 and the gas pressure relief in the second coal seam 8;
G., after the group B back production of middle coal seam finishes, successively the first coal seam 1, the second coal seam 2 and the 3rd coal seam 3 of coal seam group A in back production utilize upper coal seam group layer-through drilling 12 extractions to unmind the gas pressure relief of protected coal seam simultaneously; The first coal seam 7 of coal seam group C and the second coal seam 8 under back production protected seam utilize lower coal seam group layer-through drilling 14 extractions to unmind the gas pressure relief of protected coal seam simultaneously again.

Claims (5)

1. the multiple topping packet zone mash gas harnessing method that goes forward one by one, is characterized in that, comprises the steps:
A. according to closely high Coal Seam Prone To Outburst group occurrence characteristics and < < topping production technique standard > >, minable coal seam is divided into, in, lower three coal seam groups, in selection, coal seam group (B) is as crucial topping coal seam group, upper coal seam group (A) and lower coal seam group (C) are as protected seam coal seam group, coal seam group (B) in first exploiting, exploit again upper coal seam group (A), the lower coal seam group (C) of finally exploitation, each coal seam of each coal seam group is exploitation successively from top to bottom all,
B. in exploitation before the first coal seam of coal seam group (B), the position of last the seat earth 15 ~ 25m of coal seam group (B) in distance of elder generation, a construction driving middle group floor rock tunnel, coal seam (10), many the middle coal seam group layer-through drillings (13) that are fan-shaped distribution with rig first coal seam direction construction of coal seam group (B) in the introversion of middle group floor rock tunnel, coal seam (10), middle coal seam group layer-through drilling (13) passes each coal seam of middle coal seam group (B), and penetrates the first seam roof 0.5m of middle coal seam group (B);
C. in distance, group floor rock tunnel, coal seam (9) is gone up in one of the position of last seat earth 15 ~ 25m of coal seam group (A) construction, the first coal seam direction construction of the coal seam group (A) that makes progress in upper group floor rock tunnel, coal seam (9) with rig is many upper coal seam group layer-through drillings (12) of fan-shaped distribution, upper coal seam group layer-through drilling (12) passes each coal seam of upper coal seam group (A), and penetrates the first seam roof 0.5m of coal seam group (A);
D. the position of last seat earth 15 ~ 25m of coal seam group (C) construction lower group floor rock tunnel, coal seam (11) under distance, many lower coal seam groups that are fan-shaped distribution with rig first coal seam direction construction of coal seam group (C) downwards in lower group floor rock tunnel, coal seam (11) are worn group layer boring (14), lower coal seam group layer-through drilling (14) passes each coal seam of lower coal seam group (C), and penetrates the first seam roof 0.5m of lower coal seam group (C);
E. connect routinely extraction pipe network, middle coal seam group layer-through drilling (13) in group floor rock tunnel, centering coal seam (10) carries out original gas pre-drainage and adopts, region eliminate in after the first Coal Outburst danger of coal seam group (B), first exploit the first coal seam of the middle coal seam group (B) of crucial topping, and by the gas pressure relief in each coal seam in coal seam group (B) in middle coal seam group layer-through drilling (13) extraction in middle group floor rock tunnel, coal seam (10);
F. each coal seam in coal seam group (B) in exploiting in order, simultaneously by the gas pressure relief in each coal seam in the upper coal seam group (A) of upper coal seam group layer-through drilling (12) the extraction protected seam in upper group floor rock tunnel, coal seam (9); And by the gas pressure relief in each coal seam in the lower coal seam group (C) of protected seam under lower coal seam group layer-through drilling (14) extraction in lower group floor rock tunnel, coal seam (11);
G. after middle coal seam group (B) back production finishes, back production is carried out in each coal seam in upper coal seam group (A), then back production is carried out in each coal seam in lower coal seam group (C), back production is carried out to simultaneously in each coal seam, gas pumping release is carried out in unquarried each coal seam.
2. according to a kind of multiple topping packet zone gas pumping method that goes forward one by one described in claim l; it is characterized in that: described upper coal seam group layer-through drilling (12), middle coal seam group layer-through drilling (13) and lower coal seam group are worn whole process in group layer boring (14) steel sleeve protection is installed, and at steel sleeve, through fragment position place, region, coal seam, all stamp sieve aperture.
3. according to a kind of multiple topping packet zone gas pumping method that goes forward one by one described in claim l, it is characterized in that: each the coal seam group in described San Ge coal seam, upper, middle and lower group includes 2-5 minable coal seam.
4. according to a kind of multiple topping packet zone gas pumping method that goes forward one by one described in claim l, it is characterized in that: in each coal seam group, in floor rock tunnel, the whole pitch of holes of respectively holing of construction is 25 ~ 35m.
5. according to a kind of multiple topping packet zone gas pumping method that goes forward one by one described in claim l, it is characterized in that: the high 3m of being in floor rock tunnel constructing below each coal seam group, wide is 4m.
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CN104533512A (en) * 2014-12-16 2015-04-22 中鼎国际工程有限责任公司 Construction method for preventing and treating gas outburst in coal roadway heading process
CN104533511A (en) * 2014-12-16 2015-04-22 中鼎国际工程有限责任公司 Construction method for preventing and treating coal and gas outburst in coal roadway heading process
CN104832176A (en) * 2015-03-18 2015-08-12 西安科技大学 One-tunnel-multi-use arrangement method of low-breathability coal seam group pressure relief gas extraction high-drainage tunnel
CN105507903A (en) * 2015-12-15 2016-04-20 中国矿业大学 Coal-rock simultaneous production protecting seam and protected seam collaborative mining method
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CN108343400A (en) * 2018-01-27 2018-07-31 中国矿业大学(北京) A method of utilizing directional drilling concordant extraction coal seam group gas
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