近水平煤层开采地表移动边界的预测研究  

Study on prediction of surface movement boundary in near horizontal coal seam mining

作　　者：孙学阳[1,2] 袁官思龙 苗霖田 杜荣军[1,2] 程正 SUN Xueyang;YUAN Guansilong;MIAO Lintian;DU Rongjun;CHENG Zheng(School of Geology and Environment,Xi’an University of Science and Technology,Xi’an 710054,China;Shaanxi Provincial Key Laboratory of Geological Support for Coal Green Exploitation,Xi’an 710054,China;Key Laboratory of Coal Resources Exploration and Comprehensive Utilization,Xi’an 710054,China)

机构地区：[1]西安科技大学地质与环境学院,陕西西安710054 [2]陕西省煤炭绿色开发地质保障重点实验室,陕西西安710054 [3]煤炭资源勘查与综合利用重点实验室,陕西西安710054

出　　处：《煤矿安全》2023年第9期96-104,共9页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(41272388,51674195);自然资源部煤炭资源勘查与综合利用重点实验室开放课题资助项目(KF2020-4)。

摘　　要：预判开采沉陷对地表的影响是进行生态恢复治理规划时的1个重要环节,绘制等值线图是该环节的前提条件;以近水平煤层开采为例,运用FLAC^(3D)进行数值模拟时,计算结果中只有下沉值和水平移动值,没有倾斜、水平变形和曲率值,且无法生成等值线图,不能直观反映地表受影响的范围和程度;针对这一问题,通过FISH语言编程对模拟结果进行数据的后处理,在Surfer软件中绘制等值线图。结果表明:霍宝干河煤矿地表发生拉伸破坏的临界水平变形值为2.15 mm/m;FISH代码能够实现采煤沉陷特征值的提取,可以预测出地表移动盆地最外边界、地表危险移动边界、地表移动裂缝边界和裂缝产生的范围;工作面推进方向和开采顺序的不同会导致地表移动盆地边界距离采空区边界左右间距不相等。Predicting the impact of mining subsidence on the surface is an important link in the planning of ecological restoration and governance,and the drawing of contour map is the prerequisite for this link.Taking the mining of near horizontal coal seams as an example,using FLAC^(3D) for numerical simulation,the calculation results only have the subsidence value and horizontal movement value,and there is no inclination,horizontal deformation and curvature values,and the contour map cannot be generated,which can not directly reflect the scope and degree of surface impact.To solve this problem,the simulation results are processed by FISH language programming,and the contour map is drawn in Surfer software.The results show that the critical horizontal deformation value of surface tension failure in Huobaoganhe Coal Mine is 2.15 mm/m;FISH code can extract the characteristic value of coal mining subsidence,and predict the outermost boundary of surface movement basin,surface dangerous movement boundary,surface movement fracture boundary and the range of cracks;the different advancing direction and mining sequence of the working face will lead to the unequal distance between the boundary of the surface movement basin and the boundary of the goaf.

关 键 词：FLAC^(3D) SURFER FISH语言 地表移动变形 地表移动边界 

分 类 号：TD325.4[矿业工程—矿井建设]