CN110458367A - A kind of coal mine work area coalbed gas geology method for evaluating hazard - Google Patents
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Abstract
The invention discloses a kind of coal mine work area coalbed gas geology method for evaluating hazard, it constructs including coal seam foundation characteristic, coal seam's structural feature, Gas feature, the face gas geologic assessment index system and grade scale of Gas Outburst feature, specifically include coal seam buried depth, thickness, tomography point dimension, tectonic erosion periods, absolute/relative gas emission, gas bearing capacity, Coal Pore Structure, and the secondary index such as local outburst prediction index, establish working face scale coalbed gas geology classification evaluation method system, specifically include evaluation parameter Establishing and classification, membership function and weight determine, the building of multi-layer fuzzy mathematics appraisal, geological mapping and assessing zonings.Face gas geology grading evaluation criteria proposed by the present invention and method meet the practical geological conditions in Hancheng, Grading And Zoning result is reliable, with the potentiality promoted to other highly gassy mines and deformation coal development area, basic basis can be provided by accurate, safe and efficient exploitation Geological ensuring for coal.
Description
Technical field
The present invention relates to coal mine work areas to evaluate field, and in particular to a kind of coal mine work area coalbed gas geology hazard assessment
Method.
Background technique
Gas geological conditions and its dynamic disaster are still the key factor for restricting China's coal-mine safety in production, mining work
Face Study on Gas-geology is directly facing forefront of the production gas bearing condition and gas dynamical disaster risk precisely sentences knowledge, Synthetic
Reason measure and stoping scheme design etc., be ensure highly gassy mine coal precisely, the direct geologic basis of safe working.It is working
Before the back production of face, based on the geologic information of newest exposure, effective information is therefrom extracted in time, and face coalbed gas geology of carrying out the work classification is commented
Valence and prediction, identification payable area block and gas risk block, and propose Counter-techniques suggestion, for instructing safety coal extraction
It is of great significance.Hancheng structural environment is complicated, is the typical highly gas mining area in China and coal and gas prominent mining area, preceding
Phase has carried out more gas and coal bed gas geologic assessment in mining area, field with "nine squares" scale, to instructing coal and cbm development, protect
Barrier safety in production plays positive effect, but the opposite shortcoming of coalbed gas geology fining research of working face scale, evaluation index with
Method system also non-system building, leads to that gas risk can not be effectively predicted in exploitation process, and control measure is lack of pertinence,
It is difficult to adapt to the technical need that coal is precisely exploited.
Summary of the invention
To solve the above problems, the present invention provides a kind of coal mine work area coalbed gas geology method for evaluating hazard.
To achieve the above object, the technical scheme adopted by the invention is as follows:
A kind of coal mine work area coalbed gas geology method for evaluating hazard, includes the following steps:
S1, evaluation parameter system construction
Distinguishing hierarchy is carried out to influence gas bearing and factor outstanding first；Coalbed gas geology grading evaluation index will be constructed
It is set to general objective, and then determines that coal seam foundation characteristic, structure development feature, Gas feature and Gas Outburst feature are four
Two-level index, each two-level index include several three-level indexs again, i.e. selection coal seam buried depth, thickness, tectonic erosion periods, tomography point
Dimension, Coal Pore Structure, gas bearing capacity, maximum coal powder quantity of bore, Desorption Index for Drill Cuttings, totally 10 three-levels refer to absolute/relative gas emission
Mark carries out face gas geology grading evaluation；
S2, subordinating degree function and weight determine
It is shown in Table 1 according to the degree of membership assignment of different Index gradings, carries out sectional linear fitting, the segmentation for obtaining each index is subordinate to
Category degree calculates function and is shown in Table 2, wherein Coal Pore Structure is qualitative index, by I class, II class, III class and IV class coal body structure type coal point
It is not quantified as integer 1,2,3,4, decimal represents transitional type；
1 face gas geologic assessment index system of table and degree of membership
The subordinating degree function of 2 face gas geologic assessment index of table
Relatively and assignment is quantified two-by-two to the relative importance progress different levels index, is established between same level index
Compare discrimination matrix two-by-two, the value range of same level Indexes Comparison is: extremely important to be more than or equal to 3；Critically important 2~3, slightly
Micro- important 1~2, the two is quite 1, slightly inessential 0.5~1, inessential 0.5~1/3, it is extremely inessential to be less than or equal to 1/3,
Gas Outburst characteristic parameter highest importance is assigned, is secondly Gas feature and structure development feature, coal seam foundation characteristic
Relative importance is minimum, forms two-level index rating matrix accordingly, determines that the rating matrix of three-level index is shown in Table on this basis
3, the Maximum characteristic root and feature vector of subsequent calculating matrix, and using the consistency of random consistency ratio C.R. judgment matrix
(third-order matrix or more) shows that discrimination matrix meets consistency check standard if C.R. is less than 10%, is examined by consistency
After testing, the weighted value of second level, three-level index can be obtained respectively, and then calculate three-level index and the comprehensive weight of evaluation goal is shown in
Table 4；
Each level coalbed gas geology evaluation index rating matrix of table 3 and calculating
Each level coalbed gas geology evaluation criterion weight of 4 working face of table
S3, Mathematical Model of Comprehensive Evaluation building
Establish the mathematical forecasting model of face gas geology grading evaluation:
Wherein, A is coalbed gas geology grading evaluation index, CijIndicate being subordinate to for j-th of three-level index of i-th of two-level index
Degree, XijIndicate the weight of j-th of three-level index of i-th of two-level index；
S4, geological mapping and grading evaluation
Based on above-mentioned evaluation model, data calculating, Cheng Tu or even coalbed gas geology grading evaluation can be completed.
The invention has the following advantages:
Face gas geology grading evaluation criteria proposed by the present invention and method meet the practical geological conditions in Hancheng,
Grading And Zoning result is reliable, has the potentiality promoted to other highly gassy mines and deformation coal development area, can be that coal is accurate, pacify
Entirely, high-efficiency mining Geological ensuring provides basic basis.
Detailed description of the invention
Fig. 1 is certain working face coal seam buried depth distribution map.
Fig. 2 is absolute gas emission rate and buried depth relational graph.
Fig. 3 is certain working face coal seam thickness distribution map.
Fig. 4 is that certain working face fault tectonic fractal dimension evaluates grid dividing.
Fig. 5 is that certain working face fault tectonic network capacity ties up digital simulation figure.
Fig. 6 is certain work bedding fault capacity dimension value flat distribution map.
Fig. 7 is certain working face tectonic erosion periods isogram.
Fig. 8 is the distribution of certain working face coal thickness change rate.
Fig. 9 is certain working face absolute gas emission rate distribution map.
Figure 10 is the distribution of certain working face Coal Pore Structure.
Figure 11 is certain face gas content isogram.
Figure 12 is certain working face digging laneway coal body structure type coal sectional view (a., which is transported, cuts eye along the b. c. that rolls back and rationalize).
Figure 13 is certain face gas geological syntheses grading evaluation figure.
Figure 14 is certain face gas geology grading evaluation exponential-frequency histogram.
Specific embodiment
The present invention is described in detail combined with specific embodiments below.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the present invention
Protection scope.
Embodiment
Based on grading evaluation index proposed by the present invention and method, certain stope in Hancheng the north is divided
Analysis.Working face overall length 1149.49m, wide 166.18m, working seam is No. 3 coals, is completed cuts eye perforation at present, it is contemplated that 2020
Year back production in June finishes.Data, residual gas content measuring data, ventilation are edited and recorded according to tunnel basic measurement data, Coal Pore Structure
Gas report and geophysical exploration data, draw working face coal seam thickness using Kriging regression method respectively, top elevation, bury
Depth, Coal Pore Structure, absolute gas emission rate and residual gas content distribution of contours figure carry out coalbed gas geology single factor evaluation,
Realize that the face gas geological syntheses are evaluated on this basis.
Coal seam essential characteristic
(1) buried depth
The whole No. 3 coal seam buried depths variation in mulberry tree level ground field with "nine squares" is bigger, but regularity is obvious, and overall state is field with "nine squares" by east orientation
Western buried depth is gradually increased, and in addition to the regional area influenced by gully, buried depth is substantially along seam inclination direction change.Certain work
It is obvious to make coal seam buried depth changing rule in face, average 380 meters or so of buried depth is buried from northern one 280 transportation roadways to a direction coal seam is cut
It is deep constantly to deepen.Working face there is only I class of buried depth and II class region, overall Conditions of Buried Depth to exploitation advantageously.
Count other stope absolute gas emission rates of No. 3 coal seams and buried depth data, it can be seen that coal seam buried depth with
Gas emission correlation, i.e., as buried depth increases, gas emission totally increases (table 5).Fig. 2 shows, absolute watt
This outburst amount and buried depth are in good positive correlation, illustrate that buried depth is the key factor of control gas outburst amount, can establish base accordingly
In the absolute gas emission rate prediction model of buried depth:
Y=0.0362x-10.564
In formula, y is absolute gas emission rate, m3/ min, x are buried depth, m.
5 stope gas emission of table and coal seam buried depth relation table
(2) coal is thick
This working face Coal Seam Thickness Change is violent, between 1.7m~9.2m, average coal thickness 5.6m.Working face is less than 2.5m's
III class region is only another, and distribution is limited to out, stops to adopt the position line 200-300m, most bog-head coal thickness 1.7m positioned at certain transportation roadway distance.Work
Make the thick biggish region of coal in face to be predominantly located in the middle part of working face and stop adopting around line, distribution is wider, and close to transportation roadway
Side Coal Seam Thickness Change is more violent, up to 9.2m, minimum 1.7m.The coal thickness of this working face strong variations is to high winning technology
Severe challenge is proposed, while reflecting that coal seam deformation is strong, causes Coal Pore Structure broken, increases the danger of coal and gas prominent
Danger.
Coal seam's structural feature
(1) tomography fractals
Structural map is detected based on certain working face slot wave, evaluation structure grid cell is divided with side length 100m*100m, amounts to 24
A evaluation unit (Fig. 4).Then research area's structural unit is pressed 100*100m, 50*50m, 25*25m and 12.5*12.5m successively
Several graded nets are divided into, the lattice number containing fault trace in each unit is then counted.
By the analysis to double-log linear regression result, show that the unit data of fault network distribution has good phase
Guan Xing has fractal characteristic, the absolute value of the slope of fitting a straight line is the capacity dimension of the unit (Fig. 5).
The fault tectonic capacity dimension of 24 evaluation units of the whole district can successively be calculated according to (table 6), gained capability value, that is, generation
The numerical value of its respective unit center point of table.Then, it using each unit center point coordinate and corresponding capability value as data basis, draws
Tomography capacity dimension value plane equivalence processed.Tomography fractal dimension has good characterization to act on the complexity of mature fault,
Bedding fault capacity dimension Dk is between 0-1.1095, average out to 0.4545 (table 6) for certain work.
Certain the working face fault tectonic network capacity of table 6 dimension calculates initial data
It can be seen that capacity dimension Dk plane distribution significant difference, there are apparent subregions from capacity dimension value flat distribution map
Property, and disclose fault tectonic region with slot wave detection and tunnel substantially and coincide, the tomography developed in working face is mostly fallen
The lesser normal fault of difference pays attention to taking construction Safety Technical Management measure in fractal dimension value upper zone (> 0.8).
(2) tectonic erosion periods are analyzed
Based on roof absolute altitude isogram, mesh generation is carried out to working face region, sizing grid is 50 × 50m,
The tectonic erosion periods of each grid node are calculated, specific calculating process is with reference to above.Work is drawn according to the curvature value of grid node
Surface construction curvature isogram.
Local area tectonic erosion periods change greatly, between 0-700 × 10-6Between, working face coal is reflected jointly with the variation of coal thickness
The fact that layer deformation is strong, deformation coal is developed.In general, it is greater than 400 × 10-6High deformed region be mainly distributed and working face
Southeast side, 200-400 × 10-6Medium deformation region whole district extensive development.Based on tectonic erosion periods, can analyze potential coal with watt
This outburst danger, i.e. deformation extent are higher (curvature is bigger), and outburst hazard is bigger.In working face east side, distance stops adopting line 100
The position~300m should draw attention there are a tectonic erosion periods high level band.
(3) coal thickness change rate is analyzed
Certain working face coal thickness change rate is between 0~90 × 10-3, acutely, III class high level region is mainly distributed on the variation of coal thickness
Close to transportation roadway position, two folds cross herein herein, and develop several tomographies for working face east, cause the variation of coal thickness aobvious
It writes, primary structure is destroyed, it should be noted that prevention coalbed gas geology disaster.I class region is mainly distributed on working face west side and southern side,
II class region is widely distributed, and the coal thickness change rate in overall work face the north is noticeably greater than south, should more pay attention to diving in exploitation process
Coal and gas prominent it is dangerous.
Gas emission analysis
According to the absolute gas emission rate data accumulated during tunnelling, the absolute outburst amount number of 18 points is counted altogether
According to being shown in Table 7, draw related graph accordingly.
Certain the working face digging laneway absolute gas emission rate of table 7 statistics
Certain working face absolute gas emission rate distribution map shows that working face absolute gas emission rate changes greatly, between
0.6-7.0m3Between/min, but changing rule is significant, i.e., is gradually decreased by north orientation south.Its reason is: neighbouring working face is opened
It adopts and plays the role of release to this face gas, complete extraction finishes other working faces positioned at the working face southwest side, makes
Absolute gas emission rate during cost working face tunnels integrally reduces, and southwestern side absolute gas emission rate is substantially less than east northeast
Side.
Digging laneway absolute gas emission rate sectional view shows that the air return lane absolute gas emission rate of Adjacent Working Face is significant
Lower than the headentry, and the headentry is drastically reduced to stopping adopting line direction absolute gas emission rate, is reflected
Gas pressure-relief effect caused by surrounding coal mining work activities, the headentry are cutting a position and distance cuts a 900m
It is higher to set gas emission, reaches III grade of classification standard.In short, the coal back production in the close headentry side should be more
Aggravate view prevention gas risk.
Gas Outburst Parameter analysis
(1) Coal Pore Structure
Realistic data is edited and recorded according to tunnel Coal Pore Structure, face Coal Pore Structure of carrying out the work analysis.In view of mulberry tree level ground mine structure
Coal extensive development is made, further illustrates that digging laneway Coal Pore Structure edits and records method: 1) using 50m as a spacing is edited and recorded, constructing
Development position can be encrypted suitably；2) it edits and records the Coal Pore Structure variation a little shown according to coal wall each and is layered, record is related
Data are simultaneously drawn；3) according to each Coal Pore Structure be layered thickness proportion relationship determine the concrete type, basic principle are as follows: 1. when
When a certain Coal Pore Structure thickness proportion is more than 90%, that is, it is determined as the type；2. when the basic equal proportion distribution of different Coal Pore Structures
When, take for up not for down principle (deformation extent) to determine；3. other situations according to high deformation extent coal lift height ratio (>=
10%) comprehensive to determine transitional type.7 kinds of coal body structure type coals are marked off in the working face on this basis.
The working face Coal Pore Structure is broken, extensive development granulated coal and rotten rib coal, even if the absolute gas during driving gushes
Output is lower, but working face not yet back production, and in back production, absolute outburst amount certainly will increase, and still needs to be vigilant potential coal and gas
Outburst danger, especially in granulated coal and rotten rib coal development area.In the middle part of working face, construction is relatively easy, shows as tomography point dimension
Lower with tectonic erosion periods, Coal Pore Structure is accordingly relatively simple, based on fragmentation coal and fragmentation-granulated coal.
(2) gas bearing capacity
Digging laneway residual gas content measuring data 60 are collected altogether, are shown in Table 8, are based on this, the remaining in face of carrying out the work
Gas bearing capacity situation analysis.
Certain the working face digging laneway residual gas content of table 8 statistics
The results show that this face gas content has had been reduced to outburst danger critical value after the outburst prevention measures of region
(8m below3/ t), but change greatly, between 4.9-7.8m3Between/t, in local high methane concentration areas, especially superimposed structure,
The position of deformation coal development still should pay much attention to coal and gas prominent danger.It is to the west stopping adopting line, the headentry
Eye side by north is cut in side, and gas bearing capacity is relatively high, generally reaches 6m3/ t or more should be paid attention in back production.In the working face
Transportation roadway distance cuts and dynamic phenomenon together has occurred at the position 476m, ton coal gas emission 12.09m3/ t, the gas of the point
Content is 7.2m3/ t, Coal Pore Structure be fragmentation coal, it is seen that higher gas bearing capacity be cause this start force phenomenon it is main because
Element.
Digging laneway gas bearing capacity sectional view shows that the air return lane gas bearing capacity value of Adjacent Working Face is in 5m3/t-6.5m3/t
Between fluctuate, the headentry is in 5.0m3/t-7.5m3It is fluctuated between/t, the overall headentry gas bearing capacity is big
In the air return lane of Adjacent Working Face, this rule is similar to the variation of absolute gas emission rate, reflects Adjacent Working Face
The gas pressure-relief effect of air return lane side.The spatial distribution of gas bearing capacity is more complicated compared with absolute gas emission rate, it is shown that ground
The multiple control that matter condition, gas drainage under suction and coal mining are distributed gas bearing capacity.
Coalbed gas geology overall merit
Using above-mentioned single factor test graph as base map, mesh generation processing (50m × 50m) is done, the items for reading each grid refer to
Scale value simultaneously determines degree of membership according to table 2, and then the coalbed gas geology of each mesh point is calculated according to index weights at different levels and formula (1)
Grading evaluation index, and drawing isoline figure carry out coalbed gas geology partition of the level using 0.65 and 0.55 as threshold value, are divided into watt
This I type area of geologic risk, II type area and III type area are total to three classes region (Figure 13), and risk class is sequentially increased, and realize work based on this
Make face coalbed gas geology grading evaluation and advantageous exploitation block Forecasting recognition.
Division result is described as follows:
1) coalbed gas geology grading evaluation index is between 0.32~0.70, and average 0.57, with reflecting the face gas
Matter condition differs greatly with calamity source, and grading evaluation is significant for safe and efficient production, and selected classification thresholds, which meet, to be commented
The frequency distribution and curvilinear motion of valence index have preferable distinction (Figure 14).
2) slip-sheet structure is to cause the main geologic factor of Hancheng deformation coal extensive development, and mulberry tree Ping Kuang is located at Hancheng
Mining area secondary structural element " northern curved skating area block ", slip-sheet structure is extremely developed, and causes coal seam deformation strong, and it is bent to show as construction
Rate absolute value is higher and deformation coal is developed, and has the sliding characteristics such as typical friction mirror surface, scratch, step.In the author's needle early period
To in the structural deformation classification of mining area scale, mulberry tree Ping Kuang is distributed based on height deformation and extra-high deformation in conjunction with volatile producibility,
It points out that strong structural deformation may promote coal reservoir orthogenic evolution, causes superficial part coal seam volatile producibility extremely relatively low
The phenomenon that.Specific to the working face, in the limited range of 1150 × 166m, Coal Seam Thickness Change is violent, between 2~10m it
Between, it is formed for the strong structural deformation of working face and deformation coal and provides further evidence with evolution.
3) division result and practical geological conditions have preferable consistency, such as in transportation roadway and the angular position for cutting eye
A normal fault is disclosed, drop 1.4m, tomography surrounding medium structure is very broken, and sliding characteristics are obvious, reaches rotten rib coal rank
Not, slot wave detection result also shows the region there are obvious exception responses, thus it is speculated that the practical scale of the tomography is greater than with coverage
Tunnel discloses situation, and develops the slip-sheet structure of tomography type, causes coal seam part is strong to destroy, subregion mutually should be III type；It is transporting
Lane distance stops adopting one flexed configuration of the line position about 240m discovery, and slot wave explains several tomographies inside working face, and construction is bent
Rate significantly increases, and Coal Pore Structure is granulated coal, and subregion is III type；North side to the west, distance cut 260~680m of eye in the middle part of transportation roadway
Construction is relatively easy in range, has no tomography and fold, and for Coal Pore Structure also than more complete, subregion is I-II type；Working face stops adopting
Have no construction around line within the scope of 50m, tectonic erosion periods and tomography fractal dimension value is lower and coal seam is thicker, based on fragmentation coal, subregion
For I type.The structure development area gas that overall tunnel discloses and slot wave is explained is rated III grade (Figure 13)；In addition, due to the work
Back production finishes other working faces in face southern side, causes gas release, and the gas degree of danger in working face south is generally lower than north
Portion.The firedamp taking-out discharging drilling that working face has been carried out is there are blind area, and gas risk is not effectively reduced in blind area, and there are larger
This part blind area is also used as III type area to treat by security risk.
4) it in exploitation process, can suitably accelerate drawing speed in I type region, and drawing speed should be slowed down in II-III type area,
Reinforce coalbed gas geology disaster monitoring and early warning, especially should pay much attention to potential gas risk in III type region, reinforce gas preventing and control.
It tests and calculates in time in back production simultaneously and absolutely realized with relative abundance of methane, update face gas information database
Coalbed gas geology dynamic evaluation, for coal precisely, safe working Geological ensuring is provided.
The present invention constructs total including coal seam foundation characteristic, coal seam's structural feature, Gas feature, Gas Outburst feature
The face gas geologic assessment index system and grade scale of four aspects, specifically include coal seam buried depth, thickness, tomography point
The secondary such as dimension, tectonic erosion periods, absolute/relative gas emission, gas bearing capacity, Coal Pore Structure and local outburst prediction index
Index establishes working face scale coalbed gas geology classification evaluation method system, specifically include evaluation parameter Establishing and be classified,
The processes such as membership function and weight determination, the building of multi-layer fuzzy mathematics appraisal, geological mapping and assessing zonings.With Hancheng
For the working face of mining area, the coalbed gas geology grading evaluation index of subdivision grid is calculated, realizes that gas risk stratification differentiates and has
Benefit exploitation block prediction.As the result is shown structural deformation and its caused deformation coal be the main geologic that faces of working face extraction about
Beam proposes concrete proposals to back production accordingly.
It was verified that face gas geology grading evaluation criteria proposed by the present invention and method meet Hancheng reality
Geological conditions, Grading And Zoning result is reliable, has the potentiality promoted to other highly gassy mines and deformation coal development area, can be coal
Charcoal is accurate, safe and efficient exploitation Geological ensuring provides basic basis.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited to above-mentioned
Particular implementation, those skilled in the art can make a variety of changes or modify within the scope of the claims, this not shadow
Ring substantive content of the invention.In the absence of conflict, the feature in embodiments herein and embodiment can any phase
Mutually combination.
Claims (1)
1. a kind of coal mine work area coalbed gas geology method for evaluating hazard, which comprises the steps of:
S1, evaluation parameter system construction
Distinguishing hierarchy is carried out to influence gas bearing and factor outstanding first；Building coalbed gas geology grading evaluation index is set to
General objective, and then determine that coal seam foundation characteristic, structure development feature, Gas feature and Gas Outburst feature are four second levels
Index, each two-level index include several three-level indexs again, i.e. selection coal seam buried depth, thickness, tectonic erosion periods, tomography point dimension, coal
Totally 10 three-level indexs carry out for body structure, gas bearing capacity, maximum coal powder quantity of bore, Desorption Index for Drill Cuttings, absolute/relative gas emission
Face gas geology grading evaluation；
S2, subordinating degree function and weight determine
It is shown in Table 1 according to the degree of membership assignment of different Index gradings, sectional linear fitting is carried out, obtains the segmentation degree of membership of each index
It calculates function and is shown in Table 2, wherein Coal Pore Structure is qualitative index, and I class, II class, III class and IV class coal body structure type coal are measured respectively
Integer 1,2,3,4 is turned to, decimal represents transitional type；
1 face gas geologic assessment index system of table and degree of membership
The subordinating degree function of 2 face gas geologic assessment index of table
Relatively and assignment is quantified two-by-two to the relative importance progress different levels index, establishes two between same level index
Two compare discrimination matrix, and the value range of same level Indexes Comparison is: extremely important to be more than or equal to 3；Critically important 2~3, it is slightly heavy
1~2 is wanted, the two is quite 1, slightly inessential 0.5~1, inessential 0.5~1/3, it is extremely inessential to be less than or equal to 1/3, it assigns
Gas Outburst characteristic parameter highest importance, is secondly Gas feature and structure development feature, and coal seam foundation characteristic is opposite
Importance is minimum, forms two-level index rating matrix accordingly, determines that the rating matrix of three-level index is shown in Table 3 on this basis, with
The Maximum characteristic root and feature vector of calculating matrix afterwards, and using the consistency (three of random consistency ratio C.R. judgment matrix
Rank matrix or more), show that discrimination matrix meets consistency check standard if C.R. is less than 10%, passes through consistency check
Afterwards, the weighted value of second level, three-level index can be obtained respectively, and then calculates three-level index and the comprehensive weight of evaluation goal is shown in Table
4；
Each level coalbed gas geology evaluation index rating matrix of table 3 and calculating
Each level coalbed gas geology evaluation criterion weight of 4 working face of table
S3, Mathematical Model of Comprehensive Evaluation building
Establish the mathematical forecasting model of face gas geology grading evaluation:
Wherein, A is coalbed gas geology grading evaluation index, CijIndicate the degree of membership of j-th of three-level index of i-th of two-level index,
XijIndicate the weight of j-th of three-level index of i-th of two-level index；
S4, geological mapping and grading evaluation
Based on above-mentioned evaluation model, data calculating, Cheng Tu or even coalbed gas geology grading evaluation can be completed.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111027787A (en) * | 2020-01-06 | 2020-04-17 | 中国矿业大学(北京) | Real-time prediction method for inducing coal and gas outburst based on fault slip instability |
| CN112282733A (en) * | 2020-10-29 | 2021-01-29 | 中煤科工集团重庆研究院有限公司 | Method for determining coal bed gas abnormity by gas emission quantity characteristic while drilling |
| CN112326831A (en) * | 2020-11-03 | 2021-02-05 | 安徽理工大学 | Coal rock torsional friction comprehensive experiment system |
| CN113011705A (en) * | 2021-02-18 | 2021-06-22 | 重庆大学 | Upper and lower combined prevention and control method for deep mine coal and gas outburst well |
| CN113586150A (en) * | 2021-06-30 | 2021-11-02 | 华北科技学院(中国煤矿安全技术培训中心) | Coal and gas outburst early warning method |
| CN113902348A (en) * | 2021-11-22 | 2022-01-07 | 中铁第一勘察设计院集团有限公司 | Method for rapidly evaluating radioactive risk grade of tunnel engineering based on in-hole gamma test |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20070078333A (en) * | 2006-01-26 | 2007-07-31 | 신흥대학산학협력단 | Estimating method of danger rate for a tunnel fire and estimating system thereof |
| CN101520820A (en) * | 2009-04-09 | 2009-09-02 | 中铁二局股份有限公司 | Method for evaluating hazard of gas tunnel and device for implementing same |
| CN102722775A (en) * | 2012-05-16 | 2012-10-10 | 山西潞安环保能源开发股份有限公司 | Security crisis management system and method for coal mine |
| CN103198362A (en) * | 2013-03-19 | 2013-07-10 | 辽宁工程技术大学 | Method for coal mine safety evaluation |
| WO2014023111A1 (en) * | 2012-08-08 | 2014-02-13 | 中国矿业大学 | Coal and gas burst risk parameter drilling and predicting integrated method |
| CN106529762A (en) * | 2016-09-27 | 2017-03-22 | 西安科技大学 | New mine coal and gas outburst risk assessment method |
| CN108510146A (en) * | 2017-12-28 | 2018-09-07 | 国家安全生产监督管理总局通信信息中心 | Safety of Coal Mine Production method for prewarning risk and system |
-
2019
- 2019-08-16 CN CN201910759544.9A patent/CN110458367B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20070078333A (en) * | 2006-01-26 | 2007-07-31 | 신흥대학산학협력단 | Estimating method of danger rate for a tunnel fire and estimating system thereof |
| CN101520820A (en) * | 2009-04-09 | 2009-09-02 | 中铁二局股份有限公司 | Method for evaluating hazard of gas tunnel and device for implementing same |
| CN102722775A (en) * | 2012-05-16 | 2012-10-10 | 山西潞安环保能源开发股份有限公司 | Security crisis management system and method for coal mine |
| WO2014023111A1 (en) * | 2012-08-08 | 2014-02-13 | 中国矿业大学 | Coal and gas burst risk parameter drilling and predicting integrated method |
| CN103198362A (en) * | 2013-03-19 | 2013-07-10 | 辽宁工程技术大学 | Method for coal mine safety evaluation |
| CN106529762A (en) * | 2016-09-27 | 2017-03-22 | 西安科技大学 | New mine coal and gas outburst risk assessment method |
| CN108510146A (en) * | 2017-12-28 | 2018-09-07 | 国家安全生产监督管理总局通信信息中心 | Safety of Coal Mine Production method for prewarning risk and system |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111027787A (en) * | 2020-01-06 | 2020-04-17 | 中国矿业大学(北京) | Real-time prediction method for inducing coal and gas outburst based on fault slip instability |
| CN111027787B (en) * | 2020-01-06 | 2023-04-07 | 中国矿业大学(北京) | Real-time prediction method for inducing coal and gas outburst based on fault slip instability |
| CN112282733A (en) * | 2020-10-29 | 2021-01-29 | 中煤科工集团重庆研究院有限公司 | Method for determining coal bed gas abnormity by gas emission quantity characteristic while drilling |
| CN112326831A (en) * | 2020-11-03 | 2021-02-05 | 安徽理工大学 | Coal rock torsional friction comprehensive experiment system |
| CN112326831B (en) * | 2020-11-03 | 2022-08-16 | 安徽理工大学 | Coal rock torsional friction comprehensive experiment system |
| CN113011705A (en) * | 2021-02-18 | 2021-06-22 | 重庆大学 | Upper and lower combined prevention and control method for deep mine coal and gas outburst well |
| CN113011705B (en) * | 2021-02-18 | 2022-11-01 | 重庆大学 | Upper and lower combined prevention and control method for deep mine coal and gas outburst well |
| CN113586150A (en) * | 2021-06-30 | 2021-11-02 | 华北科技学院(中国煤矿安全技术培训中心) | Coal and gas outburst early warning method |
| CN113902348A (en) * | 2021-11-22 | 2022-01-07 | 中铁第一勘察设计院集团有限公司 | Method for rapidly evaluating radioactive risk grade of tunnel engineering based on in-hole gamma test |
| CN113902348B (en) * | 2021-11-22 | 2024-04-30 | 中铁第一勘察设计院集团有限公司 | Method for rapidly evaluating radioactivity risk level of tunnel engineering based on intra-hole gamma test |
| CN114278362A (en) * | 2021-12-21 | 2022-04-05 | 山西潞安环保能源开发股份有限公司 | Outburst prevention method for high gas mine area based on coal bed gas content classification analysis |
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