关键词: 钻隔封封孔技术, 瓦斯抽采, 自燃, 柔性膏体材料, 通风

Abstract: In order to solve the problem of poor gas drainage borehole sealing, large air leakage and associated spontaneous combustion of broken coal, a new drilling and sealing integrated sealing technology is proposed to seal the borehole of gas drainage. Drilling and Sealing Integral Sealing Technology Seal drilling holes, injecting flexible paste sealing materials, and spraying the viscous inorganic sealing materials around the drilling holes to realize the dynamic sealing around the new drilling cracks, isolate the broken coal Contact with the surrounding air to improve the concentration of gas drainage and reduce the risk of spontaneous combustion of broken coal. The field experiment of Xiaohaizi Coal Mine shows that the leakage of coal around the gas drainage borehole is greatly reduced after adopting the new drilling and sealing integrated sealing technology, the gas extraction concentration is 2.7 times higher than that of the conventional sealing hole drilling, Temperature decreased by 12.8 ℃, broken coal spontaneous combustion risk significantly reduced, and effectively protect the safety of gas extraction and efficient work carried out.