复合顶板大采高采场覆岩破断角实测及其演化规律研究  

Measurement and evolution law of overburden fracture angle in high cutting stope with composite roof

作　　者：赵晶 张礼[1,2,3] 王栓林 ZHAO Jing;ZHANG Li;WANG Shuan-lin(Safety Branch,China Coal Research Institute,Beijing 100013,China;State Key Laboratory of Coal Mining and Clean Utilization(China Coal Research Institute),Beijing 100013,China;School of Resources and Safety Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China)

机构地区：[1]煤炭科学技术研究院有限公司安全分院,北京100013 [2]煤炭资源高效开采与洁净利用国家重点实验室(煤炭科学研究总院),北京100013 [3]中国矿业大学(北京)能源与矿业学院,北京100083

出　　处：《煤炭工程》2021年第1期75-78,共4页Coal Engineering

摘　　要：基于申南凹煤矿的实际工程背景,对复合顶板大采高条件下覆岩破断角的发育情况展开深入研究。通过对高位钻孔抽采数据的长期观测,对采场侧的覆岩破断角进行了计算;利用双塞压水实验研究了采空区回风巷侧覆岩破断角;最后利用UDEC模拟分析了采空区覆岩破断角的演化过程。研究结果表明:工作面推进速度3.6m/d时,采场侧的覆岩破断角为59°,工作面后方100~110m处回风巷侧覆岩破断角为58°;破断角处于一种动态变化过程,随时间的增长可由锐角向钝角转变,最大可达109°。所得研究成果可为裂隙带瓦斯抽采钻孔布置及采空区卸压瓦斯运移规律的研究提供理论基础。Based on the actual situation of Shennanwa Coal Mine,the development of fracture angle was studied in high cutting under composite roof.Through long-term observation of the high-level drilling extraction,the fracture angle along the working face side was calculated;the lateral fracture angle of the goaf was studied by double plug water test;finally,UDEC numerical simulation was used to analyze the evolution of overburden mining fissures and fracture angles.The results indicate:when the working face advancing speed is 3.6 m/d,the fracture angle of the working face side is 59°,and the lateral fracture angle of the goaf is 58° at 100 ~ 110 m behind the working face;the fracture angle varies over time,from acute angle to obtuse angle gradually,which can reach up to 109°. The research results can provide theoretical basis for the study of drilling arrangement and gas migration and enrichment in goaf.

关 键 词：复合顶板 大采高 覆岩破断角 采空区 瓦斯抽采 

分 类 号：TD325[矿业工程—矿井建设]