【摘要】 高位钻孔抽放最主要的影响因素是合理层位选择,其钻孔参数应根据采空区冒落带及裂隙带高度来设计。文章提出了冒落带及裂隙带高度的理论计算及现场考察方法,得出的结果可为高瓦斯矿井高位钻孔抽放参数设计优化提供参考依据。更多还原

【Abstract】 The reasonable layer selection is the main influencing factors for gas drainage by high level borehole,the borehole parameters is based on the caving & fracture zone height of gob.This paper puts forward the theoretical calculations and spot investigation methods,and the results can provide reference for design optimization of the borehole parameters for gas drainage by high level borehole in gassy mine.更多还原