Abstract:
In order to solve the problems about the large of gas emission quantity and the high of gas concentration in upper corner and some areas of outburst danger in the 15102 coalface in Huang Yanhui coal mine, a comprehensive gas drainage method was used, combined with gas drainage in mining seam, highly-located drainage roadway, adjacent layer drilling and pipeline buried in the 15102 coalface. After extracting the gas, the content of gas in 15102 coalface is reduced to 2.05 ~ 7.01m
3 / t, average of 4.27m
3 / t, basically eliminated 15102 working face of danger. The average gas drainage concentration is about 40% and the pure quantity is about 25m
3/min in highly-located drainage roadway. After using the measures of adjacent layer and goaf buried tube drilling, the concentration of gas in upper corner is below 0.64%, it is better to prevent the gas overrun problem in upper corner.