神南矿区浅埋近距离煤层开采覆岩导水断裂带发育高度研究  

Research on development height of overlying water-conducting fault zone in shallow seam mining in Shennan Mining Area

作　　者：谢党虎 王建文 李民峰 郭书全 王二云 马宗宇 杜超杰 XIE Danghu;WANG Jianwen;LI Minfeng;GUO Shuquan;WANG Eryun;MA Zongyu;DU Chaojie(Shaanxi Yongxin Mining Co.,Ltd.,Yulin 719407,China;Shenmu Ningtiaota Mining Co.,Ltd.,Shaanxi Coal and Chemical Industry Group Co.,Ltd.,Yulin 719300,China;School of Mechanics and Civil Engineering,China University of Mining&Technology(Beijing),Bejing 100083,China)

机构地区：[1]陕西涌鑫矿业有限责任公司,陕西榆林719407 [2]陕煤集团神木柠条塔矿业有限公司,陕西榆林719300 [3]中国矿业大学(北京)力学与建筑工程学院,北京100083

出　　处：《煤矿安全》2023年第7期221-227,共7页Safety in Coal Mines

基　　金：陕煤陕北矿业公司重点资助项目(2018SMHKJ-A-J-03)。

摘　　要：针对神南矿区浅埋近距离煤层重复采动覆岩导水裂隙可能导通含水层,诱发突水灾害问题,采用理论分析、相似模拟、数值模拟和现场钻孔实测方法研究了柠条塔矿近距离1^(-2)煤和2^(-2)煤开采覆岩导水断裂带发育规律;1^(-2)煤充分采动时,覆岩断裂带高度约为50 m,尚未与第四系松散孔隙潜水和侏罗系风化基岩承压水连通;当1^(-2)煤和2^(-2)煤重复采动时,理论预测导水断裂带高度约为136 m,物理和数值模拟得知覆岩断裂带发育高度约为140 m,现场钻孔实测导水断裂带的高度约为135 m,三者非常吻合,断裂带与侏罗系风化基岩承压水连通。提出了超前工作面300 m从回采巷道向侏罗系风化基岩打钻孔疏放承压水的措施,现场实践表明:2^(-2)煤开采过程中未发生突水溃沙事故。Aiming at the fact that the water-conducting fissures in the overlying rock may cut through aquifers and induce water inrush disasters by repeated mining of shallow-buried and short-distance coal seams in Shennan Mining Area,this paper adopts the methods of similarity simulation,numerical simulation and field drilling measurement to study the short-distance 1^(-2)coal and 2^(-2)coal mining overlying rock water-conducting fracture zone development law.When the 1^(-2)coal is fully mined,the height of the overlying fissure zone is about 50 m,and it is not connected with the upper quaternary loose pore water and the Jurassic weathered bedrock confined water;when the 1^(-2)coal and 2^(-2)coal are in repeated mining,the theoretical prediction of the waterconducting fault zone is about 136 m,the development height of the overburden fault zone is about 140 m according to the physical and numerical simulation,and the height of the water-conducting fault zone measured by the field borehole is about 135 m.The three are very consistent,and the fault zone is connected with the confined water of Jurassic weathered bedrock.The measures of dredging confined water from mining roadway to weathered bedrock of Jurassic at 300 m in advance working face are proposed.The field practice shows that no accident of water inrush and sand collapse occurs in the process of coal mining.

关 键 词：浅埋煤层 近距离煤层 重复采动 导水断裂带高度 突水溃沙 

分 类 号：TD741[矿业工程—矿井通风与安全]