CN105569724A - Method for optimizing outburst-prevention technical measures for coal and gas outburst mine - Google Patents

Method for optimizing outburst-prevention technical measures for coal and gas outburst mine Download PDF

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Publication number
CN105569724A
CN105569724A CN201510920080.7A CN201510920080A CN105569724A CN 105569724 A CN105569724 A CN 105569724A CN 201510920080 A CN201510920080 A CN 201510920080A CN 105569724 A CN105569724 A CN 105569724A
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China
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technical measures
protrusion
cluster
outburst
dispelling
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CN201510920080.7A
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罗文柯
游波
张慧
凤雯
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Hunan University of Science and Technology
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Hunan University of Science and Technology
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose

Abstract

The invention discloses a method for optimizing outburst-prevention technical measures for a coal and gas outburst mine. The method comprises the following specific steps: 1), various outburst-prevention technical measures are made according to the on-site condition of a coal mine; 2), a value of a cluster evaluation index under each outburst-prevention technical measure is determined; and a cluster evaluation index matrix is established; 3), the outburst-prevention technical measures made in the step 1) are divided into multiple grades, and white functions of each cluster evaluation index in different grades in the technical schemes are determined; 4), the weight coefficient of each cluster evaluation index is determined; 5), index fixed weight cluster coefficients are solved, and a fixed weight cluster coefficient matrix is established; 6), the largest coefficient in the fixed weight cluster coefficient matrix is found, and the corresponding outburst-prevention technical measure is the optimal technical scheme. With the adoption of the method, the optimal outburst-prevention technical measure for the coal mine can be acquired, the gas treatment cost is reduced, the drilling workload is reduced, drilling construction time is shortened, and a basis is laid for increase of gas suction capacity on a coal seam and comprehensive treatment of gas in the mine.

Description

A kind of optimization method of coal and gas outburst mine protrusion-dispelling technical measures
Technical field
The invention belongs to mine gas prevention and control field, particularly relate to a kind of optimization method of coal and gas outburst mine protrusion-dispelling technical measures.
Technical background
Mine gas is the general name of underground coal mine pernicious gas, general special nail alkane (CH 4), be mainly present in coal seam and country rock, have flammable, can quick-fried, suffocate and the character such as poisonous.In exploitation of coal resources process, the gas accident of generation has gas explosion, coal and gas prominent, gas combustion and gas asphyxiation Four types.
For coal and gas outburst mine, in order to make coal-bed gas pressure and gas bearing capacity be reduced to meet coal-bed gas pressure < 0.74MPa, the gas bearing capacity < 8m in China's " coal and gas outburst prominent controlling specifies " 3the requirement of/t, mine often adopts the method for protective coat extracted and gas pumping to carry out release extinction process to working seam in advance, when validity check and area validation meet requiring of " coal and gas outburst prominent controlling regulation ", can carry out mining work activities.
Polytype protrusion-dispelling technical measures are presented, the protrusion-dispelling technical measures of modernization projecting mine, the various combination of two or more gas pre-drainage method often based on technique and space-time condition difference.Choosing of the gas pumping technical measures at mine scene, technician first tentatively drafts several scheme often, then transfers to ore deposit chief engineer to examine, but which scheme is optimum actually, and the wisdom with chief engineer or several people is difficult to make accurate judgement.To the quality of a gas pumping scheme how, because its evaluation method is a lot, when the varying number especially in evaluation index is larger from great disparity in different dimension, the not scientific of evaluation result is easily caused.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides the optimization method of the scientific strong coal and gas outburst mine protrusion-dispelling technical measures of a kind of evaluation result, it can obtain the protrusion-dispelling technical measures of suitable mine operating mode, gas control cost can be reduced, reduce borehole engineering amount, shorten the drilling construction time.
The technical solution used in the present invention is: a kind of optimization method of coal and gas outburst mine protrusion-dispelling technical measures, and concrete steps are as follows:
1) according to colliery scene situation, multiple protrusion-dispelling technical measures are drafted;
2) determine that the Cluster Assessment under often kind of protrusion-dispelling technical measures refers to target value, build Cluster Assessment index matrix; Cluster Assessment under same protrusion-dispelling technical measures refers to that target value is positioned at same a line of matrix; Same Cluster Assessment under different protrusion-dispelling technical measures refers to that target value is positioned at the same row of matrix; Cluster Assessment index matrix is: A=(x ij); Wherein: i is the sequence number of multiple protrusion-dispelling technical measures; J is the sequence number of Cluster Assessment index;
3) by step 1) in the protrusion-dispelling technical measures drafted be divided into multiple grade; And determine the whitened weight function of each Cluster Assessment index under different brackets in often kind of protrusion-dispelling technical measures: wherein: k is the sequence number of multiple grade;
4) the weight coefficient δ of each Cluster Assessment index is determined j;
5) by formula ask for the index of i-th kind of protrusion-dispelling technical measures under kth grade and surely weigh cluster coefficients, set up and surely weigh cluster coefficients matrix: wherein: m is total number of Cluster Assessment index, n is the kind sum of grade, and r is the kind sum of protrusion-dispelling technical measures;
6) find out and determine numerical value maximum in power cluster coefficients matrix, the protrusion-dispelling technical measures of its correspondence are optimal technical solution.
In the optimization method of above-mentioned coal and gas outburst mine protrusion-dispelling technical measures, step 2) in Cluster Assessment index comprise construction extraction borehole engineering amount, drilling construction time, protrusion-dispelling fund input, gas control cost and prevent and treat secondary disaster.
In the optimization method of above-mentioned coal and gas outburst mine protrusion-dispelling technical measures, step 3) in protrusion-dispelling technical measures are divided into Three Estate.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention is by determining power rule in gray theory, to the outburst prevention measures tentatively drafted as clustering object, get borehole engineering amount (m), the engineering time (my god), fund always drops into (ten thousand yuan), gas control cost (unit/t) and secondary disaster as Cluster Assessment index; By good, better, differ from 3 classes grey clustering analysis carried out to preliminary draft scheme, choose the optimum outburst prevention measures of suitable mine operating mode, present invention reduces gas control cost, decrease borehole engineering amount in gas control process, shorten the drilling construction time; For the comprehensive regulation improving coal bed gas extraction amount and mine gas lays the foundation.
Accompanying drawing explanation
Fig. 1 is the arrangement front view of protrusion-dispelling technical measures I of the present invention.
Fig. 2 is A-A sectional view in Fig. 1.
Fig. 3 is the arrangement schematic diagram of protrusion-dispelling technical measures II of the present invention.
Fig. 4 is B-B sectional view in Fig. 3.
Fig. 5 is the arrangement schematic diagram of protrusion-dispelling technical measures III of the present invention.
Fig. 6 is C-C sectional view in Fig. 5.
Fig. 7 is the arrangement schematic diagram of protrusion-dispelling technical measures IV of the present invention.
Fig. 8 is D-D sectional view in Fig. 7.
Fig. 9 is the close-up schematic view of I in Fig. 7
In figure: 101 floor rocks concentrate lane; 102-drill site; 103-coal seam; 104-haulage way; 105-tailgate; 106-cut eye; 107-layer-through drilling; 201-concordant is holed; 202-fully distressed zone; 203-inabundant distressed zone; 301-high-order drill site; 302-High Position Drilling; 401-goaf semi-hermetic pipe laying, 402-fire dam, 403-pipe laying mouth assembly.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further illustrated.
For the colliery structure in Fig. 1-8, draft four kinds of protrusion-dispelling technical measures:
As shown in Figure 1, 2, the implementation of protrusion-dispelling technical measures I: namely concentrate in lane 101 at seat earth rock, (50m ~ 80m) constructs a drill site 102 at a certain distance, in in drill site 102 to coal seam 103 construct some grid types on to layer-through drilling 107, layer-through drilling 107 is popularized for all regions in full exploiting field, then networks and takes out coal-bed gas in region in advance.
As shown in Figure 3,4, the implementation of protrusion-dispelling technical measures II: concentrate in lane 101 at the floor rock in coal seam 103, (50m ~ 80m) constructs a drill site 102 at a certain distance, in drill site 102 to the haulage way 104 in coal seam 103, tailgate 105 and cut eye 106 band in construct networking after layer-through drilling 107, take out the gas in band in advance.Gallery 104 to be transported, tailgate 105 and cut after the band of eye 106 and the coal body danger around in certain limit thereof eliminates, namely after the regional effect inspection of satisfied " control coal and gas prominent specifies " requires with area validation, then can enter in coal seam by connection roadway, construction coal haulage way 104, tailgate 105 and cut eye 106, meanwhile, concordant of simultaneously constructing along coal seam 103 in tailgate 105 side or haulage way 104 side holes 201.To distressed zone 203 inabundant in region, be connected with gas pumping pipe network by concordant boring, take out the gas in coal seam 103 in non-relief area in advance.
As shown in Figure 5,6, the implementation of protrusion-dispelling technical measures III: on the basis of protrusion-dispelling technical measures II, a construction high-order drill site 301 on the top board being increased in working seam 103, to the fissure zone construction High Position Drilling 302 in goaf 303 in high-order drill site 301, extraction leaves over coal seam release gas from adjacent coal seam or goaf.
As shown in Figure 7,8; the implementation of protrusion-dispelling technical measures IV: on the basis of protrusion-dispelling technical measures III; at increase goaf, goaf semi-hermetic pipe laying 401 pairs of gas pumpings; namely the extraction line end by laying at the tailgate 105 of work plane 106 establishes a bend pipe; make the extraction mouth of pipe be raised to tailgate 105 top, and establish grillage and fire dam 402 to protect its pipe laying.Take over pipe installation length and be greater than 10m, and every 50m, one group of threeway, by-pass valve control and pipe laying mouth assembly 403 are installed on the rear portion drainage tube of work plane, in advance of the face process, the pipe laying mouth of goaf semi-hermetic pipe laying 401 is retained in the goaf 303 of work plane, by extraction system, extraction is carried out to the gas in goaf 303.When the advance of the face is to threeway place of next pipe laying mouth, pipe laying mouth has been embedded in 3 ~ 5m in goaf, the last pipe laying section by-pass valve control be embedded in goaf is closed, opens the pipe laying mouth valve of next circulation, reach with this object utilizing the continuous extraction goaf gas of pipe laying.
For above-mentioned 4 kinds of protrusion-dispelling technical measures, always to drop into from borehole engineering amount, construction time, fund, gas control cost and prevent and treat secondary disaster aspect and research is compared to it, according to the observation x of each clustering object about each clustering target ij, build Cluster Assessment index matrix A, the Cluster Assessment under same protrusion-dispelling technical measures refers to that target value is positioned at same a line of Cluster Assessment index matrix A; Same Cluster Assessment under different protrusion-dispelling technical measures refers to that target value is positioned at the same row of Cluster Assessment index matrix A.
A = ( x i j ) = x 11 x 12 x 13 x 14 x 21 x 22 x 23 x 24 x 31 x 32 x 33 x 34 x 41 x 42 x 43 x 44 .
The determination of Cluster Assessment index and albefaction number: in grey cluster, clustering object (protrusion-dispelling technical measures I, II, III, IV) is called sample, and clustering factor is called index.Determining construction extraction borehole engineering quantity, drilling construction time, protrusion-dispelling fund input, gas control cost and preventing and treating secondary disaster is Cluster Assessment index.
Ash class divides: dividing the four kinds of protrusion-dispelling technical measures tentatively drafted, better, differ from Three Estate, by judging the grade of j index, obtaining the whitened weight function list records under j evaluation index k grade; With represent i-th whitened weight function of a sample jth index under kth grade (i=1,2,3,4; J=1,2,3,4,5; K=1,2,3).
Respectively to 5 Cluster Assessment indexs (borehole engineering amount, engineering time, fund input, gas control cost and prevent and treat secondary disaster) given weight coefficient:
δ 1＝β 1,δ 2＝β 2,δ 3＝β 3,δ 4＝β 4,δ 5＝β 5。
By formula: (i=1,2,3,4; K=1,2,3) asking for the index of i-th kind of protrusion-dispelling technical measures under kth grade respectively weighs cluster coefficients surely, can calculate:
&sigma; 1 = ( &sigma; 1 1 , &sigma; 1 2 , &sigma; 1 3 ) &sigma; 2 = ( &sigma; 2 1 , &sigma; 2 2 , &sigma; 2 3 ) &sigma; 3 = ( &sigma; 3 1 , &sigma; 3 2 , &sigma; 3 3 ) &sigma; 3 = ( &sigma; 4 1 , &sigma; 4 2 , &sigma; 4 3 ) ,
Based on the above results, setting up its grey fixed weight cluster coefficient matrix Σ is:
&Sigma; = ( &sigma; i k ) = &sigma; 1 1 &sigma; 1 2 &sigma; 1 3 &sigma; 2 1 &sigma; 2 2 &sigma; 2 3 &sigma; 3 1 &sigma; 3 2 &sigma; 3 3 &sigma; 4 1 &sigma; 4 2 &sigma; 4 3 .
Scheme optimization interpretation of result: according to grey fixed weight cluster coefficient matrix, finds out coefficient maximum in matrix, determines row and the row at its place.
If:
m a x ( &sigma; i k ) = &sigma; 2 2 ,
If the numerical value namely in coefficient matrix for time maximum, then show that, in 4 kinds of described protrusion-dispelling technical measures, protrusion-dispelling technical measures II are the technical scheme of resultant effect optimum, therefore suggestion preferentially adopts the protrusion-dispelling technical measures II drafted.

Claims (3)

1. an optimization method for coal and gas outburst mine protrusion-dispelling technical measures, concrete steps are as follows:
1) according to colliery scene situation, multiple protrusion-dispelling technical measures are drafted;
2) determine that the Cluster Assessment under often kind of protrusion-dispelling technical measures refers to target value, build Cluster Assessment index matrix; Cluster Assessment under same protrusion-dispelling technical measures refers to that target value is positioned at same a line of matrix; Same Cluster Assessment under different protrusion-dispelling technical measures refers to that target value is positioned at the same row of matrix; Cluster Assessment index matrix is: A=(x ij); Wherein: i is the sequence number of multiple protrusion-dispelling technical measures; J is the sequence number of Cluster Assessment index;
3) by step 1) in the protrusion-dispelling technical measures drafted be divided into multiple grade; And determine the whitened weight function of each Cluster Assessment index under different brackets in often kind of protrusion-dispelling technical measures: wherein: k is the sequence number of multiple grade;
4) the weight coefficient δ of each Cluster Assessment index is determined j;
5) by formula ask for the index of i-th kind of protrusion-dispelling technical measures under kth grade and surely weigh cluster coefficients, set up and surely weigh cluster coefficients matrix: wherein: m is total number of Cluster Assessment index, n is the kind sum of grade, and r is the kind sum of protrusion-dispelling technical measures;
6) find out and determine numerical value maximum in power cluster coefficients matrix, the protrusion-dispelling technical measures of its correspondence are optimal technical solution.
2. the optimization method of coal and gas outburst mine protrusion-dispelling technical measures according to claim 1, step 2) in Cluster Assessment index comprise construction extraction borehole engineering amount, drilling construction time, protrusion-dispelling fund input, gas control cost and prevent and treat secondary disaster.
3. the optimization method of coal and gas outburst mine protrusion-dispelling technical measures according to claim 1, step 3) in protrusion-dispelling technical measures are divided into Three Estate.
CN201510920080.7A 2015-12-11 2015-12-11 Method for optimizing outburst-prevention technical measures for coal and gas outburst mine Pending CN105569724A (en)

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Cited By (5)

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Publication number Priority date Publication date Assignee Title
CN106761906A (en) * 2017-01-17 2017-05-31 湖南科技大学 A kind of protective coat extracted relief range measurement method of many drill hole informations
CN107100665A (en) * 2017-06-09 2017-08-29 西安科技大学 A kind of coal bed gas extraction indirect economic effect evaluation method based on mine gas Treatment design
CN110107343A (en) * 2019-03-29 2019-08-09 山西能源学院 Deep high methane high-ground stress constructs coal road outburst elimination method more
CN110909976A (en) * 2019-10-11 2020-03-24 重庆大学 Outburst mine extraction mining deployment rationality judgment improvement method and device
CN112288589A (en) * 2020-10-29 2021-01-29 中煤科工集团重庆研究院有限公司 Method for measuring gas flow field of goaf by utilizing goaf closed wall extraction data

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106761906A (en) * 2017-01-17 2017-05-31 湖南科技大学 A kind of protective coat extracted relief range measurement method of many drill hole informations
CN106761906B (en) * 2017-01-17 2018-11-23 湖南科技大学 A kind of protective coat extracted relief range measurement method of more drill hole informations
CN107100665A (en) * 2017-06-09 2017-08-29 西安科技大学 A kind of coal bed gas extraction indirect economic effect evaluation method based on mine gas Treatment design
CN110107343A (en) * 2019-03-29 2019-08-09 山西能源学院 Deep high methane high-ground stress constructs coal road outburst elimination method more
CN110909976A (en) * 2019-10-11 2020-03-24 重庆大学 Outburst mine extraction mining deployment rationality judgment improvement method and device
CN110909976B (en) * 2019-10-11 2023-05-12 重庆大学 Improved method and device for evaluating rationality of mining deployment of outstanding mine
CN112288589A (en) * 2020-10-29 2021-01-29 中煤科工集团重庆研究院有限公司 Method for measuring gas flow field of goaf by utilizing goaf closed wall extraction data
CN112288589B (en) * 2020-10-29 2022-04-08 中煤科工集团重庆研究院有限公司 Method for measuring gas flow field of goaf by utilizing goaf closed wall extraction data

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