复杂地质条件极薄煤层下向测压技术

Technology of Downward Gas Pressure in Thin Seam under Complicated Geological Conditions

分析了复杂地质条件下的极薄煤层下向钻孔测压的难点,并对传统的封孔测压方法进行了选择和优化,在此基础上提出了双液浆直接固定孔口管-高压注浆-MⅡ型瓦斯压力测定仪三步走测压技术,并运用在梁北煤矿井筒揭煤测压工作,取得了良好的效果。

Analyzes the difficulties of the thin coal seam under complex geological conditions, elects and optimizes the traditional methods of pressue measurement. Based on this proposes three-step method of two-slurry directly fixed orifice tube-high-pressure grouting-M Ⅱ type of gas pressure measurement meter. Use it in the exposing coal shaft in Liangbei coal mine and chieve good results of gas pressure measurement.