Study on Gas Control Technology in Soft and Thin Seam with High Gas Content

Abstract

The problem of gas control in soft and thin seam with high gas content has been puzzling the safety production of coal mine, and the pre-drainage of borehole gas in this seam is one of the effective measures to solve this problem. According to the occurrence characteristics of soft and thin coal seam with high gas content in a mine in Shanxi, this paper studies the reasonable hole sealing depth and drilling construction technology of this coal seam, and determines that the reasonable hole sealing depth of pre-drainage drilling is 18m, and the optimal drilling construction technology is pneumatic directional drilling, which improves the gas pre-drainage concentration of this coal seam to more than 52%, improves the gas control effect of this coal seam, and provides important reference for gas control of other coal seams with similar occurrence conditions.