CN109886600A - The method of monitoring and warning bifurcation of coal seam assembly section bump risk - Google Patents
The method of monitoring and warning bifurcation of coal seam assembly section bump risk Download PDFInfo
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Abstract
The present invention relates to a kind of methods of monitoring and warning bifurcation of coal seam assembly section bump risk, it is normalized including by Burst Tendency index, and the shear stress overall target obtained with test carries out integrated treatment, corresponding Burst Tendency comprehensive judgement index is obtained, and bump risk is determined with this.Using the method for monitoring and warning bifurcation of coal seam assembly section bump risk of the invention, it is able to achieve the real-time monitoring and early warning of target area shock hazard, easy to operate, expense is lower, and precision improves, and has wider application range.
Description
Technical field
The present invention relates to coal mining technology field more particularly to coal mining risk averse technical field, in particular to
A kind of method of monitoring and warning bifurcation of coal seam assembly section bump risk.
Background technique
Coal is the important energy source in China, petroleum, natural with the demand of industry restructuring in recent years and environmental protection
Gas and new energy ratio become larger, and the consumption of coal resources decreases.But the status of " rich coal, oil-poor, few gas " makes coal exist
Main energy sources are still accounted in coming few decades.Currently, the superficial part coal resources of eastern region have been produced substantially, mining depth by
Gradually develop to deep.It is expected that China's majority coal mine will enter the mining depth of 1000m to 1500m 20 years following.With coal
The arrival in deep mining epoch, deep wall rock by " three high one disturb ", (disturb by high-ground stress, Thief zone pressure, High-geotemperature, strong exploitation
It is dynamic) it influences, coal mine rock burst tends to be frequent.Originally there is the mine of impact disaster, shock hazard is more severe；Originally
, also gradually there is impact phenomenon in the mine for not impacting disaster.Bump refer to around roadway or working face coal and rock due to
The instantaneous relase of elastic deformation energy and generate the dynamic phenomenon that acutely destroys suddenly, be often accompanied by coal and rock dish out, loud noise and blast
Phenomena such as.It can not only cause roadway destruction, casualties, above ground structure to destroy, but also gas, coal dust can be caused quick-fried
Fried, fire and floods, interference ventilating system etc., are one of coal mine disasters, drastically influence the safe and efficient of coal mine and open
It adopts.The time occurred due to the complexity of coal mining geology and mining conditions, rock blast hazard and region have diversity and dash forward
Hair property, therefore prediction and warning is carried out to it also just as global problem.Especially to bifurcation of coal seam assembly section impact disaster
Research is not enough, and being monitored early warning to its shock hazard, there is also the impacts of many deficiencies, such as national regulations at present
Proneness index is measured using laboratory test, only represents the attribute of coal body material itself, cannot reflect geology
With the influence of exploitation；Elastic wave CT inversion technique can't accomplish real-time early warning；Micro-seismic method and acoustic emission and electromagnetic radiation
Technical error is larger, accuracy rate is relatively low.
Summary of the invention
The purpose of the present invention is overcoming the above-mentioned prior art, provides a kind of fast accurate and judge target area
The method of the monitoring and warning bifurcation of coal seam assembly section bump risk of bump risk.
To achieve the goals above, the method tool of monitoring and warning bifurcation of coal seam assembly section bump risk of the invention
There is following composition:
The method of the monitoring and warning bifurcation of coal seam assembly section bump risk, is mainly characterized by, the method
It includes the next steps:
(1) the Burst Tendency index in the coal seam is normalized, obtains Burst Tendency overall target；
(2) impact shear test is carried out to the bifurcated assembly section acquisition sampling in the coal seam, the bifurcated for obtaining the coal seam merges
The shearing strength in area and corresponding shear stress overall target；
(3) the Burst Tendency overall target and the shear stress overall target are subjected to integrated treatment, obtained
Corresponding Burst Tendency comprehensive judgement index；
(4) bump of the bifurcated assembly section in the coal seam is determined according to the Burst Tendency comprehensive judgement index
Risk.
Further, the Burst Tendency index includes dynamic destruction time index, elastic energy index, impact energy
Volume index and the strong index of uniaxial compressive, it is described that the Burst Tendency index in the coal seam is normalized, it is impacted
Tendentiousness overall target, specifically:
Burst Tendency index is normalized as follows and obtains Burst Tendency overall target, and is led to
The impact for carrying out the bifurcated assembly section that Burst Tendency qualification test obtains coal seam to coal seam sampling where bifurcated assembly section is crossed to incline
The numerical value of tropism overall target:
Wherein, DT is dynamic destruction time index, WETFor elastic energy index, KEFor impact energy index, RcFor single shaft
Pressure resistance index, UDTFor normalization after dynamic destruction time index,For normalization after elastic energy index,For
Impact energy index after normalization,For the strong index of uniaxial compressive after normalization, U1For the Burst Tendency after normalization
Overall target.
Further, the bifurcated assembly section acquisition sampling to the coal seam carries out impact shear test, is somebody's turn to do
The shearing strength of the bifurcated assembly section in coal seam and corresponding shear stress overall target, specifically:
The coal seam where bifurcated assembly section is sampled according to sampling principle, impact shear test is carried out after processing, is obtained
To the shearing strength and corresponding shear stress overall target of the bifurcated assembly section in the coal seam, place is normalized by following formula
Reason:
Wherein, U2For the shear stress overall target of the bifurcated assembly section in the coal seam after normalization, ImaxFor point in the coal seam
The shear stress overall target of assembly section is pitched,τ is the shear stress of the bifurcated assembly section in the coal seam, and [τ] is the coal seam
Bifurcated assembly section shearing strength.
Further, described to carry out the Burst Tendency overall target and the shear stress overall target
Integrated treatment obtains corresponding Burst Tendency comprehensive judgement index, specifically:
Corresponding Burst Tendency comprehensive judgement index is obtained by following formula:
Uc=λ1U1+λ2U2；
Wherein, UcFor the Burst Tendency comprehensive judgement index of the bifurcated assembly section in the coal seam, λ1+λ2=1, λ1And λ2It is
Weighted value.
Further, the bifurcated that the coal seam is determined according to the Burst Tendency comprehensive judgement index closes
And the bump risk in area, specifically:
According to the shake of the mine for the bifurcated assembly section for monitoring the coal seam and stress data to λ1And λ2It is corrected, obtains corresponding
The data of Burst Tendency comprehensive judgement index determine the bump risk of the bifurcated assembly section in the coal seam with this.
Using the method for monitoring and warning bifurcation of coal seam assembly section bump risk of the invention, to Burst Tendency
Index and shear stress are normalized, and form Burst Tendency comprehensive judgement index, determine that the bifurcated in coal seam merges with this
The shock hazard in area is able to achieve the real-time monitoring and early warning of target area shock hazard, and easy to operate, expense is lower, essence
Degree improves, and has wider application range.
Detailed description of the invention
Fig. 1 is the flow chart of the method for monitoring and warning bifurcation of coal seam assembly section bump risk of the invention.
Fig. 2 is the specific implementation structure of the method for monitoring and warning bifurcation of coal seam assembly section bump risk of the invention
Figure.
Specific embodiment
It is further to carry out combined with specific embodiments below in order to more clearly describe technology contents of the invention
Description.
As shown in Figure 1, the process of the method for monitoring and warning bifurcation of coal seam assembly section bump risk of the invention
Figure.As shown in Fig. 2, the specific implementation knot of the method for monitoring and warning bifurcation of coal seam assembly section bump risk of the invention
Composition.
In a specific embodiment, the method for the present invention includes the following steps:
(1) the Burst Tendency index in the coal seam is normalized data processing computer, obtains burst trend
Property overall target, wherein Burst Tendency index includes dynamic destruction time index D T, elastic energy index WET, impact energy
Index KEWith the strong index R of uniaxial compressivec, the specific formula that handles is as follows, and data processing computer is according to coal seam where bifurcated assembly section
DT, W can be calculated by sampling data obtained by the Burst Tendency qualification test carried outET、KEAnd RcFour finger target values, and press
U is obtained according to lower formula1Value:
Wherein, UDTFor normalization after dynamic destruction time index,For normalization after elastic energy index,
For normalization after impact energy index,For the strong index of uniaxial compressive after normalization, U1It is comprehensive for Burst Tendency after normalization
Close index；
(2) coal seam where bifurcated assembly section is sampled according to sampling principle, impact shear test is carried out after processing,
The shearing strength and corresponding shear stress overall target of the bifurcated assembly section in the coal seam are obtained, is normalized by following formula
Processing:
Wherein, U2For the shear stress overall target of the bifurcated assembly section in the coal seam after normalization, ImaxFor point in the coal seam
The shear stress overall target of assembly section is pitched,τ is the shear stress of the bifurcated assembly section in the coal seam, and [τ] is the coal seam
Bifurcated assembly section shearing strength；
In addition, data processing computer is merged by the bifurcated that the data that underground monitoring substation acquires in real time obtain the coal seam
The stress distribution law curve in area, from which further follows that maximum principal stress σ1With minimum principal stress σ3Value, obtained by following formula
The shear stress data of the bifurcated assembly section in the coal seam, thus obtain U2Value:
(3) data processing computer is carried out Burst Tendency overall target and shear stress overall target by following formula
Integrated treatment obtains corresponding Burst Tendency comprehensive judgement index:
Uc=λ1U1+λ2U2；
Wherein, UcFor the Burst Tendency comprehensive judgement index of the bifurcated assembly section in the coal seam, λ1+λ2=1, λ1And λ2It is
Weighted value, λ1It is related with the Burst Tendency of coal；λ2It is related with stress difference, it is influenced by digging and geological conditions, in addition, the two
Being moved by mine shock is influenced；
(4) data processing computer is according to the mine shake for the bifurcated assembly section for monitoring the coal seam and stress data to λ1And λ2Into
Row correction, for example, by using mathematics method, calculates corresponding Burst Tendency comprehensive judgement index, and determines point in the coal seam
Pitch the bump risk of assembly section.
In a preferred embodiment, shear stress overall target I can be definedmaxWith Burst Tendency comprehensive judgement
Index UcCriterion, as shown in Tables 1 and 2, to export more concise judgement as a result, simultaneously taking according to the result
Corresponding Controlling of Coal Outburst measure.
1 shock hazard standard (shear stress) of table
2 Burst Tendency comprehensive judgement index of table
Using the method for monitoring and warning bifurcation of coal seam assembly section bump risk of the invention, to Burst Tendency
Index and shear stress are normalized, and form Burst Tendency comprehensive judgement index, determine that the bifurcated in coal seam merges with this
The shock hazard in area is able to achieve the real-time monitoring and early warning of target area shock hazard, and easy to operate, expense is lower, mentions
In high precision, there is wider application range.
In this description, the present invention is described with reference to its specific embodiment.But it is clear that can still make
Various modifications and alterations are without departing from the spirit and scope of the invention.Therefore, the description and the appended drawings should be considered as illustrative
And not restrictive.
Claims (5)
1. a kind of method of monitoring and warning bifurcation of coal seam assembly section bump risk, which is characterized in that the method packet
Include following steps:
(1) the Burst Tendency index in the coal seam is normalized, obtains Burst Tendency overall target；
(2) impact shear test is carried out to the bifurcated assembly section acquisition sampling in the coal seam, obtains the bifurcated assembly section in the coal seam
Shearing strength and corresponding shear stress overall target；
(3) the Burst Tendency overall target and the shear stress overall target are subjected to integrated treatment, obtained corresponding
Burst Tendency comprehensive judgement index；
(4) determine that the bump of the bifurcated assembly section in the coal seam is dangerous according to the Burst Tendency comprehensive judgement index
Property.
2. the method for monitoring and warning bifurcation of coal seam according to claim 1 assembly section bump risk, feature exist
In the Burst Tendency index includes that dynamic destruction time index, elastic energy index, impact energy index and single shaft are anti-
Pressure Exponent, it is described that the Burst Tendency index in the coal seam is normalized, Burst Tendency overall target is obtained,
Specifically:
Burst Tendency index is normalized as follows and obtains Burst Tendency overall target:
Wherein, DT is dynamic destruction time index, WETFor elastic energy index, KEFor impact energy index, RcIt is strong for uniaxial compressive
Index, UDTFor normalization after dynamic destruction time index,For normalization after elastic energy index,For normalization
Impact energy index afterwards,For the strong index of uniaxial compressive after normalization, U1Refer to for the Burst Tendency synthesis after normalization
Mark.
3. the method for monitoring and warning bifurcation of coal seam according to claim 2 assembly section bump risk, feature exist
In the bifurcated assembly section acquisition sampling to the coal seam carries out impact shear test, obtains the bifurcated assembly section in the coal seam
Shearing strength and corresponding shear stress overall target, specifically:
The coal seam where bifurcated assembly section is sampled according to sampling principle, impact shear test is carried out after processing, is somebody's turn to do
The shearing strength of the bifurcated assembly section in coal seam and corresponding shear stress overall target, are normalized by following formula:
Wherein, U2For the shear stress overall target of the bifurcated assembly section in the coal seam after normalization, ImaxIt is closed for the bifurcated in the coal seam
And the shear stress overall target in area,τ is the shear stress of the bifurcated assembly section in the coal seam, and [τ] is the bifurcated in the coal seam
The shearing strength of assembly section.
4. the method for monitoring and warning bifurcation of coal seam according to claim 3 assembly section bump risk, feature exist
In, it is described that the Burst Tendency overall target and the shear stress overall target are subjected to integrated treatment, obtain phase
The Burst Tendency comprehensive judgement index answered, specifically:
Corresponding Burst Tendency comprehensive judgement index is obtained by following formula:
Uc=λ1U1+λ2U2；
Wherein, UcFor the Burst Tendency comprehensive judgement index of the bifurcated assembly section in the coal seam, λ1+λ2=1, λ1And λ2It is weight
Value.
5. the method for monitoring and warning bifurcation of coal seam according to claim 4 assembly section bump risk, feature exist
In the bump danger of the bifurcated assembly section for determining the coal seam according to the Burst Tendency comprehensive judgement index
It is dangerous, specifically:
According to the shake of the mine for the bifurcated assembly section for monitoring the coal seam and stress data to λ1And λ2It is corrected, is impacted accordingly
The data of tendentiousness comprehensive judgement index determine the bump risk of the bifurcated assembly section in the coal seam with this.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110598162A (en) * | 2019-08-26 | 2019-12-20 | 北京科技大学 | Impact risk evaluation method considering coal seam thickness and coal seam impact tendency |
| CN117787728A (en) * | 2024-02-27 | 2024-03-29 | 贵州省煤层气页岩气工程技术研究中心 | Coal mine roadway gas explosion risk level evaluation method based on visualization |
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| CN102392685A (en) * | 2011-09-12 | 2012-03-28 | 山东科技大学 | Dense roadway group rock burst hazard prediction method |
| CN103410565A (en) * | 2013-03-14 | 2013-11-27 | 天地科技股份有限公司 | Monitoring system and early warning method for rock burst multi-parameter process |
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| US20040242528A1 (en) * | 2003-05-28 | 2004-12-02 | Hagstrom James E. | Intravenous delivery of polynucleotides to cells in mammalian limb |
| CN101963071A (en) * | 2010-09-14 | 2011-02-02 | 北京安科兴业科技有限公司 | Equivalent drilling cuttings weight continuous monitoring device and method |
| CN102392685A (en) * | 2011-09-12 | 2012-03-28 | 山东科技大学 | Dense roadway group rock burst hazard prediction method |
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| CN110598162A (en) * | 2019-08-26 | 2019-12-20 | 北京科技大学 | Impact risk evaluation method considering coal seam thickness and coal seam impact tendency |
| CN117787728A (en) * | 2024-02-27 | 2024-03-29 | 贵州省煤层气页岩气工程技术研究中心 | Coal mine roadway gas explosion risk level evaluation method based on visualization |
| CN117787728B (en) * | 2024-02-27 | 2024-04-30 | 贵州省煤层气页岩气工程技术研究中心 | Coal mine roadway gas explosion risk level evaluation method based on visualization |
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