多步分段封孔技术在测量下向测压孔中的应用

Application of the Technology of Multi-step Sub-sealing on Measuring Gas Pressure in Down-direction Holes

准确测定煤层瓦斯压力主要是用高压注浆方法封堵钻孔围岩裂隙,以隔绝钻孔的封孔段与围岩裂隙的连通;介绍了用多步分段封孔测压技术测定较破碎煤层瓦斯压力,通过对煤层瓦斯压力的实测及封孔工艺综合分析,找出了测定煤层瓦斯压力的较为先进的方法,具有一定的推广应用价值。

The high-pressure injection method to isolate the connectivity between the sealing section of drilling and rock fracture can accurately measure gas pressure.This article introduces technology of multi-step sub-sealing to measure the gas pressure of the broken seam.Through measuring gas pressure of coalseam and analyzing the hole sealing technology,a more advanced method to measure gas pressure of coalseam has been found,which has certain applied value.