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Determination method for key influence factors and important degree of dilatation of gas-containing coal-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 randomness and subjectivity, lack of objectivity and impartiality in the ranking of the importance of the analysis index system, etc.

Inactive Publication Date: 2013-12-18
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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  • Determination method for key influence factors and important degree of dilatation of gas-containing coal-rock mass
  • Determination method for key influence factors and important degree of dilatation of gas-containing coal-rock mass
  • Determination method for key influence factors and important degree of dilatation of gas-containing coal-rock mass

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Embodiment Construction

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

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

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

[0052] First, carry out strength test: test the uniaxial stress-strain curves of gas-containing coal and rock mass under different gas pressures, in which the load loading method is used to ...

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Abstract

The invention provides an analyzing method for key influence factors and an important degree of the dilatation of a gas-containing coal-rock mass of an exploiting disturbance working surface based on a test in order to avoid that invalid factors are more and cannot be taken out and reasonable distribution of weights of the key influence factors is influenced. The analyzing method comprises the following steps: determining each influence factor of the dilatation of the gas-containing coal-rock mass of the exploiting disturbance working surface; carrying out two-by-two comparison on each key influence factor to determine a judging matrix; establishing a weight set of each key influence factor of the dilatation by adopting a normalization processing method; and furthermore, carrying out consistency identification on the weight of each key influence factor. The method provided by the invention has wide practicability and avoids subjectively giving a key influence factor index; dilatation characteristics and a special judgment standard value are analyzed by a laboratory test according to a field observation experiment, so that an analysis result is scientific, objective, safe and reliable.

Description

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

Claims

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Application Information

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