厚松散层大采高开采地表移动变形规律研究  

Study on Law of Surface Movement and Deformation in Thick Loose Layer with Large Mining Height

作　　者：余学义[1,2] 穆驰 张冬冬[1,2,3] YU Xueyi;MU Chi;ZHANG Dongdong(School of Energy Engineering,Xi’an University of Science and Technology,Xi’an 710054,China;Key Laboratory of Western Mines and Hazard Prevention,Ministry of Education,Xi’an 710054,China;Shaanxi Provincial Land Engineering Construction Group,Xi’an 710054,China)

机构地区：[1]西安科技大学能源学院,陕西西安710054 [2]西部矿井开采及灾害防治教育部重点实验室,陕西西安710054 [3]陕西省土地工程建设集团,陕西西安710054

出　　处：《煤矿安全》2020年第4期235-239,243,共6页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51874230);高等学校博士学科点专项科研基金资助项目(20106121110003);陕西省自然科学基金资助项目(2011JS005)。

摘　　要：针对神东矿区工程地质条件,构建了上湾煤矿地表移动观测站,选取了该矿12401工作面近1年地表移动观测数据,根据解析法计算工作面岩层移动角值参数,并运用FLAC3D对地表下沉及水平移动进行数值模拟。结果表明:地表下沉量与覆岩岩性成正比,下沉速度与覆岩岩性成反比,在厚松散层工程地质条件下,基岩离层被压密,岩体结构被破坏,造成地表下沉量和下沉速度增大,地表移动变形对矿区建筑物造成影响和损坏,衍生为地质灾害的诱导因子,当开采综合边界角为60°时,可减少地表移动范围,降低矿区地质灾害发生。According to the engineering geological conditions of Shendong Mining Area, the surface movement observation station of Shangwan Coal Mine was constructed. The surface movement observation data of 12401 working face of the mine was selected for nearly one year. The moving angle value parameters of the working face rock layer were calculated according to the analytical method, FLAC3D was used to simulate the subsidence and horizontal movement of the earth. The results show that the surface subsidence is directly proportional to the overburden lithology, and the sinking velocity is inversely proportional to the overburden lithology. Under the thick and loose layer engineering geological conditions, the bedrock is compacted and the rock mass structure is destroyed. The surface subsidence and sinking speed increase, and the surface movement deformation affects and damages the mining area. It is derived as an inducing factor for geological disasters. When the comprehensive boundary angle of mining is 60 °,the surface movement range can be reduced to reduce the occurrence of geological hazards in the mining area.

关 键 词：大采高 厚松散层 移动变形 数值模拟 地表下沉量 下沉速度 

分 类 号：TD325.2[矿业工程—矿井建设]