【摘要】 在分析了14205综采工作面瓦斯涌出特征的基础上,进一步对顶板采动裂隙分布特征及顶板千米长钻孔抽采技术原理进行了研究,结合从德国引进的千米长定向钻机设备,提出了千米长钻孔高抽钻孔组和裂隙钻孔组联合抽采技术。更多还原

【Abstract】 On the basis of an analysis of the characteristics of mine gas inflow in #14205 longwall face,this article presents a study on the characters of distribution of mining induced fissures in roof strata and the technology of mine gas extraction through the 1000m long directional boreholes in the roof strata.Also on the basis of the use of 1000m directional borehole drilling machines imported from Germany,the article proposes the technology for integrated mine gas extraction from the so-called high rate extraction holes and fissure extraction holes based on the 1000m directional boreholes.更多还原