截流抽采顶板煤层越层瓦斯高位钻孔技术研究  

Study on High Level Borehole Technology of Pressure Relief Gas in Roof Drainage Coal Seam

作　　者：史先志[1,2] 李鹏 SHI Xian-zhi;LI Peng(School of Resources and Earth Science,China University of Mining and Technology,Xuzhou 221116,China;Guizhou Yuxiang Mining Group Investment Co.,Ltd.,Bijie 550081,China)

机构地区：[1]中国矿业大学资源与地球科学学院,江苏徐州221116 [2]贵州钰祥矿业集团投资有限公司,贵州毕节550081

出　　处：《煤炭技术》2020年第5期79-81,共3页Coal Technology

摘　　要：利用顶板裂隙"O"形圈及关键层理论,计算选取了抽放钻孔终孔位置,有针对性地设计、调整了瓦斯抽放钻孔的施工参数,确定了每组边缘高位钻孔与巷道的夹角、钻孔孔深及钻孔倾角。通过施工高位钻孔,实现了对M8煤层越流瓦斯截流的高效抽放,保证了高位钻孔稳定抽放瓦斯纯量达到8.23 m^3/min。Using the"O"ring and the key layer theory of the roof fissures,the final hole position of the drainage hole is calculated.The construction parameters of the gas drainage drilling are designed and adjusted.The angle of the high borehole and the roadway,the depth of the hole and the hole angle are determined.Through the construction of high level boreholes,the efficient drainage of M8 coal seam gas flow interception is realized,ensuring the high level borehole stable drainage gas purity reached8.23 m^3/min.

关 键 词：高位钻孔 参数确定 抽放效果 

分 类 号：TD712[矿业工程—矿井通风与安全]