穿松软高突煤层上向测压钻孔封孔技术工艺探讨

摘要

针对某矿穿松软高突煤层常规封孔测压过程中出现的问题，分析了影响封孔质量的因素，提出了采用一次开孔—带压注浆—二次开孔的封孔工艺。通过现场试验，有效地封堵了过松软高突煤层的高压力瓦斯及围岩裂隙，提高了测压钻孔的封孔质量，成功解决了过松软高突煤层的瓦斯压力测定问题。%Aiming at issues during regular hole-sealing pressure measuring process across soft and serious outburst seams at certain mine,this paper analyzed the influential factors of hole sealing quality and proposed hole-sealing procedures carried out as first boring,pressured grou-ting and second boring. Field application experiment effectively cemented high pressure gas and surrounding rock fractures across soft and serious outburst seams,enhanced pressure-measuring borehole sealing quality and successfully solve the problem of gas pressure measurement across soft and serious outburst seams.