深部煤层开采导水裂隙发育规律研究  

Study on Development Patterns of Water-conducting Fractures in Deep Coal Seam Mining

作　　者：李振华[1] 任梓源 杜锋[1] 王文强 陈文飞 汪隆靖 LI Zhenhua;REN Ziyuan;DU Feng;WANG Wenqiang;CHEN Wenfei;WANG Longjing(School of Energy Science and Engineering,Henan Polytechnic University,Jiaozuo 454001,China;Datun Coal Power Co.,Ltd.,Xuzhou 221600,China;Luhe Coal Industry Co.,Ltd.,Shanxi Orchid Group,Jincheng 048000,China)

机构地区：[1]河南理工大学能源科学与工程学院,河南焦作454001 [2]大屯煤电有限责任公司,江苏徐州221600 [3]山西兰花集团芦河煤业有限公司,山西晋城048000

出　　处：《煤炭技术》2024年第7期149-154,共6页Coal Technology

基　　金：河南省高校科技创新团队支持计划(23IRTSTHN005);国家自然科学基金面上项目(52174073,52274079)。

摘　　要：导水裂隙发育规律是深部煤层安全开采的一个重要参数,以孔庄煤矿7303工作面为依托,采用相似模拟实验、钻孔注水漏失量探测和钻孔窥视相结合的方法,对工作面导水裂隙发育特征进行研究。结果表明:相似模拟实验表明工作面平均周期来压步距19.5 m,垮落带呈梯形,随着工作面推进,离层裂隙被压实,导水裂隙发育由低速向高速转变,导水裂隙最大发育高度69.8 m,裂采比21.8。通过现场实测得到导水裂隙最大发育高度65.27 m,裂采比18.13,与浅部煤层工作面裂隙发育特征进行对比分析,裂采比与煤层埋深呈正相关。该研究成果对孔庄煤矿防治水害具有重要的指导意义。The development pattern of water-conducting fractures is an important parameter for the safe mining of deep coal seams.Based on the 7303 working face of Kongzhuang coal mine,a combination of similar simulation experiments,borehole water injection and leakage detection,and borehole visual inspection methods were used to study the characteristics of water-conducting fracture development in the working face.The results show that in the similar simulation experiments,the average periodic overburden distance of the working face is 19.5 m.The roof of the working face undergoes strata separation,fractures,and collapse,forming a trapezoidal subsidence zone.As the working face advances,the strata separation fractures gradually become compacted,and the development of water-conducting fractures transitions from low speed to high speed.The maximum development height of water-conducting fractures is 69.8 m,with a fracture-to-mining ratio of 21.8.Through on-site measurements,the maximum development height of water-conducting fractures is found to be 65.27 m,with a fracture-to-mining ratio of 18.13.A comparison with shallow coal seam working faces indicates a positive correlation between the fracture-to-mining ratio and the depth of the coal seam.This research outcome has significant implications for water hazard prevention in Kongzhuang coal mine.

关 键 词：深部开采 导水裂隙 相似模拟 现场实测 

分 类 号：TD326[矿业工程—矿井建设] TD745