Method for evaluating gas environment of open coal mine

Abstract

The present invention discloses a method for evaluating the gas environment of the open coal mine, and belongs to the technical field of coal mining engineering. The method comprises: establishing an extension matter-element model of the green degree for the to-be-evaluated gas environment of the open coal mine; carrying out normalization on a definition domain of each evaluation index; calculating the comprehensive weight of each evaluation index by using the analytic hierarchy process and the entropy weight method; and according to the comprehensive weight and correlation degree of each evaluation index, determining the green degree evaluation grade and the fluctuation trend of the gas environment, and formulating a follow-up mining and treatment scheme for the to-be-evaluated gas environment of the open coal mine. According to the method disclosed by the present invention, the extension matter-element model is free from the restrictions of the kinds and the amount of the index, so that coexisting qualitative and quantitative problems are solved; the analytic hierarchy process and the entropy weight method are combined by using the game theory to carry out weight assignment, so that not only differences of the mines are taken into account to carry out reasonable regulation, but also objectivity and rationality of the weight are ensured; and the method can evaluate the design level of the open mines, and guides the mine design units and mine enterprises to implement green mining from the beginning of development of the mine field.

Description

technical field [0001] The invention belongs to the technical field of coal mine mining engineering, and in particular relates to an evaluation method for the gas environment of an open-pit coal mine. Background technique [0002] At present, there are 405 open-pit coal mines in the country, including 72 open-pit mines with a mining capacity of more than 2 million tons, and 40 open-pit mines with a mining capacity of more than 20 million tons. The output of open-pit coal mines accounts for 14% of the country's total coal output. Under the background that coal still accounts for more than 60% of my country's primary energy consumption, with the continuous improvement of environmental protection concepts and the development trend of large-scale open-pit coal mines, the environmental damage caused by open-pit mining has increasingly attracted the attention of the whole society. As academician Qian Minggao first proposed the concept of green mines in 2003 and gradually improved ...

AI Technical Summary

Problems solved by technology

However, the gray theory and the fault tree method have the shortcomings of insufficient accuracy and cumbersome calculations; the fuzzy comprehensive evaluation method is not easy to determine the weight and membership degree; the neural network method affects the accuracy of the evaluation when there are insufficient or excessive learning samples

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