In order to solve the problem of gas exceeding the limit in the upper corner of the 1307 working face of a certain mine in Jinmei Group,a method of setting the direction of high extraction roadway for gas extraction was adopted.Firstly,the opti-mal extraction layer and distance from the return air roadway were determined through empirical formula calculation.Then,Fluent software was used to simulate the gas extraction effect of the high extraction roadway.Finally,the simulation scheme was arranged on site for verification.The results show that when the vertical distance of the high extraction roadway is 35m and the horizontal dis-tance is 30m,the gas concentration in the upper corner is less than 1%,which complies with the Coal Mine Safety Regulations and effectively solves the problem of gas exceeding the limit in the upper corner of the working face.
维普
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