低-中-高位钻孔采空区瓦斯抽采技术实践

On the Practice of Gas Extraction in Low-Middle-High Hole Drilling Zone

根据寺河矿初采及正常回采期间采空区瓦斯涌出实际,分析了部分瓦斯涌出原因,设计并施工了低、中位钻孔、高位钻孔,依次衔接接替抽采采空区瓦斯,各钻孔达到并超出预期效果,提高了采空区瓦斯抽采效率,缓解了工作面正常回采期间的瓦斯治理压力。

Based on the goaf gas emission of the Temple River Coal Mine in the preliminary and normal extraction, the paper analyses the reasons for the gas emission, constructs low-, middle-, high-hole drilling, which not only improve the goaf gas extraction efficiency, but also reduce the gas pressure during normal mining,obtaining desired effects.