单一低透气性高瓦斯煤层走向高位裂隙带钻孔瓦斯抽采效果分析

Effect Analysis on Drilling Gas Drainage by High-level Towards Fractured Zone in Single Low Permeability Coal Seam

高位裂隙带钻孔瓦斯抽采现已在全国普遍应用,准确划分上覆岩层中裂隙带的分布范围,能够确保高位钻孔瓦斯抽采效果。以余吾煤矿N2202综采放顶煤工作面为例,通过理论计算、数值模拟和现场考察,综合划分裂隙带的分布范围,进而确定终孔高度,为优化走向高位裂隙钻孔参数提供依据,达到优化抽采工艺,提高瓦斯抽采效果,改善工作面安全生产状况。

High gas drainage drilling fractured zone is now widely used in the country, actuating distribution division overburden on the fracture zone, to ensure that the effect of high gas drainage drilling. Taking over Yuwu N2202 mechanized coal caving face, for example, through theoretical calculations, numerical simulation and site visits, comprehensive distribution division of the fractured zone, and to determine the height of the final hole, towards provide a basis for optimizing high fracture drilling parameters, optimizing the extraction process, improving gas drainage results in improving the safety situation face.