Impact danger evaluation method of mine pre-exploiting coal seam

Abstract

The invention provides an impact danger evaluation method of a mine pre-exploiting coal seam. The method comprises the following steps: establishing a mine area three-dimensional digital geological model and visualizing the model; grasping a space occurrence environment of a coal seam; determining a geological master control factor of a rock burst; performing grid division on a horizontal projection of a pre-exploiting coal seam area, quantifying a geological master control factor of each grid point, and forming a coal seam impact danger evaluation index system; generating an isoline nephogram of each index; establishing a mine pre-exploiting coal seam impact danger evaluation model; and evaluating an impact danger grade of each grid point, obtaining an impact danger grade of any position of the mine pre-exploiting coal seam area, and generating and visualizing an impact danger grade nephogram of the mine pre-exploiting coal seam area. According to the invention, by use of a digital visualization geological information technology, an impact danger area is preliminarily grasped in advance before the coal seam is exploited, relevant prevention and control measures can be taken in a danger area, and method provided by the invention has wide application prospect for safe coal seam exploitation of a rock burst mine.

Description

technical field [0001] The invention relates to the technical field of mine safety mining, in particular to a method for evaluating the impact risk of a mine pre-mined coal seam. Background technique [0002] With the increase of mining depth year by year, coal has entered the stage of deep mining, and rock burst disasters occur frequently, which have caused huge property losses and casualties. In order to solve such a difficult situation, experts and scholars at home and abroad have made outstanding contributions to the risk assessment, monitoring, early warning and prevention of rock burst. Due to the limitations of previous exploration techniques, unexpected unknown structures often appear in the mining area, such as small faults, collapse columns, igneous rock intrusion, etc., making the impact risk pre-evaluation of the research area ineffective. The real-time monitoring and evaluation technology in the process, this method adopts multiple means of joint monitoring in ...

AI Technical Summary

Problems solved by technology

Although this method has alleviated the difficult situation of impact dynamic disaster prediction and prevention to a certain extent, the accuracy of the evaluation is still not high, and the effect is limited.

There are three main disadvantages: first, the geological factor index constructed is not comprehensive enough; second, the result of the evaluation is the overall risk level of the entire mining area or working face, which cannot reflect the risk of different locations in the same coal seam or the same mining area or the same working face. The impact risk level is also different in objective reality; finally, the evaluation by experts is highly subjective and lacks effective mathematical quantification methods

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