综放采煤工作面顶板导水裂隙带发育高度研究  

Research on development height of water conducting fracture zone in fully mechanized caving face

作　　者：贺亮亮 杨磊 郭云 王飞 李贵娟 HE Liangliang;YANG Lei;GUO Yun;WANG Fei;LI Guijuan(Shaanxi 186 Coalfield Geology Co. ,Ltd. ,Xi’an 710065,China;Chang’an University,Xi’an 710061,China)

机构地区：[1]陕西省一八六煤田地质有限公司,陕西西安710065 [2]长安大学,陕西西安710061

出　　处：《陕西煤炭》2021年第6期165-168,195,共5页Shaanxi Coal

摘　　要：煤层采后覆岩导水裂隙带发育高度不同,会引起覆岩不同层位的含水体水涌入矿井,对矿井安全生产造成威胁。准确确定煤层采后导水裂隙带发育高度,对煤矿水害防治工作意义重大。以永陇矿区郭家河煤矿综放采煤工作面为例,采用冲洗液漏失量观测法、孔内电视窥视法和离散元数值模拟方法,综合研究了工作面导水裂隙带发育高度及演化规律。结果表明,本区导水裂隙带发育最高点应定为安定组地层上部的离层空间底,安定组上部离层空间以上的导水裂隙通常并不与采空区直接连通,相关探查方法可为相似条件下的煤矿水害防治工作提供参考。The development height of water conducting fracture zone in overburden is different after coal mining,which will cause water from different aquifer in overburden to flow into the mine and threaten the safety production of the mine.Accurately determining the development height of water conducting fracture zone after coal mining is of great significance to the prevention and control of water disaster in coal mine.Taking the fully mechanized caving face of Guojiahe Coal Mine in Yonglong mining area as an example,the development height and evolution law of water conducting fracture zone in the working face are researched by using the flushing fluid leakage observation method,borehole TV peeping method and discrete element numerical simulation method.The results show that the highest point of the water conducting fracture zone in this area should be the bottom of the separation space in the upper part of Anding formation,and the water conducting fracture above the separation space in the upper part of Anding formation is usually not directly connected with the goaf.The relevant exploration methods can provide reference for the prevention and control of water disasters in coal mines under similar conditions.

关 键 词：导水裂隙带 发育高度 裂采比 数值模拟 

分 类 号：TD32[矿业工程—矿井建设] TD745