Key influencing factors and determination method of importance degree for expansion of gas-bearing coal and rock mass

A technology of influencing factors and determination methods, applied in the direction of strength characteristics, measuring devices, instruments, etc., can solve the problems of large randomness and subjectivity, lack of objectivity and fairness in the ranking of the importance of the analysis index system, etc.

Inactive Publication Date: 2016-08-24
ANHUI UNIV OF SCI & TECH
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Problems solved by technology

[0008] On the issue of weight distribution, different analysts often have different views on the same issue, which is very arbitrary and subjective, and the importance ranking of the analysis index system lacks objectivity and fairness

Method used

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  • Key influencing factors and determination method of importance degree for expansion of gas-bearing coal and rock mass
  • Key influencing factors and determination method of importance degree for expansion of gas-bearing coal and rock mass
  • Key influencing factors and determination method of importance degree for expansion of gas-bearing coal and rock mass

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Embodiment Construction

[0049] In one embodiment, the method for determining the key influencing factors and importance of the expansion of the gas-containing coal and rock mass in the mining disturbance working face of the present invention includes the following steps:

[0050] 1. Determine the factors affecting the expansion of gas-bearing coal and rock mass in the mining disturbed face

[0051] 1.1. Take coal samples with different geological occurrence conditions, test the stress-strain curve of gas-containing coal and rock mass, and analyze the volume strain characteristics of gas-containing coal and rock mass. The strain includes the mechanical properties of coal and rock failure and instability processes. The test of the stress-strain curve of gas-containing coal and rock mass specifically includes the following tests:

[0052] First, conduct a strength test: test the uniaxial stress-strain curves of gas-bearing coal and rock masses under different gas pressures, in which the load loading method is ...

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Abstract

In order to avoid too many invalid factors that cannot be eliminated and affect the reasonable distribution of the weights of key influencing factors, the present invention provides a test-based analysis method for analyzing key influencing factors of gas-containing coal and rock mass expansion in mining disturbance working faces, including: determining mining Disturb the factors affecting the capacity expansion of gas-containing coal and rock mass in the working face, compare the key influencing factors to determine the judgment matrix, and use the normalization method to establish the weight set of the key influencing factors of capacity expansion, and further analyze the key factors. Influencing factor weights are verified for consistency. The method of the present invention has wide practicability, avoids subjective setting of key influencing factor indicators, and analyzes expansion characteristics and expert judgment standard values ​​through laboratory tests according to on-site observation experiments, so that the analysis results are scientific, objective, safe and reliable.

Description

Technical field [0001] The invention belongs to the field of prevention and control of deep mining disasters in coal mines, and more specifically, relates to a test-based method for determining key influencing factors and importance of the expansion of gas-containing coal and rock mass in a mining disturbance face. Background technique [0002] The expansion of gas-bearing coal and rock mass in mining disturbance working face is the phenomenon of volumetric nonlinear expansion and deformation of gas-bearing coal and rock mass under mining action. The expansion of gas-bearing coal and rock mass in the working face can easily induce coal and gas outburst accidents, which has a serious impact on safety production. [0003] With the increase of mining depth, the expansion of gas-bearing coal and rock mass in the working face will induce more and more serious coal and gas outburst accidents. Therefore, to control the expansion of gas-bearing coal and rock mass, the key to the expansion ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/00
Inventor 谢广祥胡祖祥
Owner ANHUI UNIV OF SCI & TECH
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