Application of controllable shock wave seam permeability enhancement technology in Jining coal mine
In order to reduce the gas outflow of Jining Coal Mine during the mining back of the 2#coal seam,increase the amount of gas extraction from a single hole.Jining coal mine adopts the controlled shockwave coal seam penetration technology in 2107 railroad track and centralized tape aisle area,adopts reasonable operation parameters,and examines the implementation effect of controlled shockwave in 2#coal seam,so as to solve the problem of gas management in Jining coal mine.The results show that the total amount of extraction from the 10 penetration-enhancing drill holes in the 2107 railroad track is 183 813.63 m3,and the average extraction concentration is 59.23%,The total amount of extraction from the six penetration-enhancing drill holes in the centralized tape alley was 52 672.74 m3,with an average extraction concentration of 43.26%.Through the implementation of controlled shock wave penetration enhancement measures,the permeability of the 2#coal seam has been effectively improved,and the gas extraction has been increased to a certain extent.
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