多煤层重复开采地表下沉系数演变研究  

Evolution of surface subsidence coefficient for repeated mining ofmultiple coal seams

作　　者：张明媚 薛永安[2] ZHANG Mingmei;XUE Yongan(Department of Geological and Surveying Engineering,Shanxi Institute of Energy,Jinzhong 030060,China;College of Mining Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]山西能源学院地质与测绘工程系,山西晋中030060 [2]太原理工大学矿业工程学院,山西太原030024

出　　处：《煤炭工程》2024年第2期152-156,共5页Coal Engineering

基　　金：国家自然科学基金青年科学基金项目(42301103);山西省基础研究计划(自由探索类)面上项目(202303021221187);教育部产学合作协同育人项目(220802313205840,202102245009,22087106262449)。

摘　　要：以太原西山矿区杜儿坪煤矿南三盘区为研究区,采用FLAC3D软件建立数值模型,分析矿区2^(#)、3^(#)煤层重复开采后的地表下沉系数演变规律。数值模拟实验结果表明:沉陷预计结果与原有成果、PS-InSAR监测结果均吻合较好,下沉系数随重复采动次数增加呈现增大趋势,表现为2^(#)煤层分层开采时的下沉系数是一次采全高的1.1倍,继续开采下部3^(#)煤层时下沉系数是2^(#)煤层分层开采时的1.27倍。研究结果为多煤层重复开采下的地表沉陷防控和地物保护提供了依据,也为开展重复采动生态损伤及恢复治理等研究提供了基础参考。Taking the South No.3 panel of Duelping Coal Mine in Taiyuan Xishan mining area as the study area,FLAC3D software was used to establish numerical model and analyze the evolution of the surface subsidence coefficient of the 2#and 3#coal seams after repeated mining in the area.The simulaition results show that:the subsidence prediction results are in good agreement with the original results and the results of the PS-InSAR monitoring,and the subsidence coefficient shows a increasing trend with the increase of the number of repeated mining.The subsidence coefficient of 2#coal seam is 1.1 times of the total height in full-seam mining,and the subsidence coefficient of the lower 3#coal seam is 1.27 times of that of 2#coal seam.The results of the study can provide a basis for prevention and control of surface subsidence and the protection of features under repeated mining of multiple coal seams,and a basic reference for study of ecological damage and restoration management of repeated mining.

关 键 词：分层开采 重复采动 下沉系数 沉陷规律 数值模拟 

分 类 号：TD325[矿业工程—矿井建设]