Method for optimizing outburst-prevention technical measures for coal and gas outburst mine

Abstract

The invention discloses a method for optimizing outburst-prevention technical measures for a coal and gas outburst mine. The method comprises the following specific steps: 1), various outburst-prevention technical measures are made according to the on-site condition of a coal mine; 2), a value of a cluster evaluation index under each outburst-prevention technical measure is determined; and a cluster evaluation index matrix is established; 3), the outburst-prevention technical measures made in the step 1) are divided into multiple grades, and white functions of each cluster evaluation index in different grades in the technical schemes are determined; 4), the weight coefficient of each cluster evaluation index is determined; 5), index fixed weight cluster coefficients are solved, and a fixed weight cluster coefficient matrix is established; 6), the largest coefficient in the fixed weight cluster coefficient matrix is found, and the corresponding outburst-prevention technical measure is the optimal technical scheme. With the adoption of the method, the optimal outburst-prevention technical measure for the coal mine can be acquired, the gas treatment cost is reduced, the drilling workload is reduced, drilling construction time is shortened, and a basis is laid for increase of gas suction capacity on a coal seam and comprehensive treatment of gas in the mine.

Description

technical field [0001] The invention belongs to the field of mine gas prevention and control, in particular to an optimization method of coal and gas outburst mine outburst prevention technical measures. technical background [0002] Mine gas is the general term for harmful gases in coal mines, generally methane (CH 4 ), which mainly exist in coal seams and surrounding rocks, and are flammable, explosive, suffocating and toxic. During the mining of coal resources, there are four types of gas accidents: gas explosion, coal and gas outburst, gas burning and gas suffocation. [0003] For coal and gas outburst mines, in order to reduce the coal seam gas pressure and gas content to meet the coal seam gas pressure < 0.74MPa and gas content < 8m 3 / t requirements, mines often adopt protective layer mining and gas drainage methods to relieve pressure and eliminate outbursts in mining coal seams in advance, and only when the effect inspection and regional verification meet th...

AI Technical Summary

Problems solved by technology

The selection of technical measures for gas drainage on the mine site is often made by the technicians who first draw up several plans and then submit them to the chief engineer of the mine for approval. judge

As for the pros and cons of a gas drainage scheme, due to its many evaluation methods, especially when there are large differences in the different quantities and dimensions of the evaluation indicators, it is easy to cause unscientific evaluation results

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