厚松散层下开采覆岩及地表移动变形规律试验研究  

Experimental Study on Overlying Strata and Surface Movement and Deformation Law of Mining under Thick Loose Layer

作　　者：夏筱红[1] 魏宏涛 杨伟峰[1] 徐洪远 张方正 XIA Xiao-hong;WEI Hong-tao;YANG Wei-feng;XU Hong-yuan;ZHANG Fang-zheng(School of Resources and Geosciences,China University of Mining and Technology,Xuzhou 221116,China;CCCC First Harbor Consultants Co.,Ltd.,Tianjin 300222,China)

机构地区：[1]中国矿业大学资源与地球科学学院,徐州221116 [2]中交第一航务工程勘察设计院有限公司,天津300222

出　　处：《科学技术与工程》2023年第32期14053-14059,共7页Science Technology and Engineering

基　　金：中央高校基本科研业务费专项资金(2017ZDPY11)。

摘　　要：煤炭开采保障了中国能源供应,同时也因采空造成了地表变形沉降。针对厚松散层下开采覆岩及地表移动变形问题,依托兖州矿区某煤矿地质背景,采用模型试验,监测研究了采动过程中地表及各层覆岩移动变形指标的变化规律,探索了采掘结束后的持续变形阶段。结果表明:受采动影响厚松散层压缩导致的移动变形值在整体移动变形上占比增大;在煤层采厚2.2 m条件下,观测获得采后地表的最大下沉值为1447.6 mm,最大水平移动值为394.6 mm。研究成果对矿区工程建设用地及线路规划选址具有一定的实用意义。Coal mining has guaranteed China s energy supply,but also caused surface deformation and subsidence due to mining.Aiming at the problem of overlying strata and surface movement and deformation under thick unconsolidated layers,based on the geological background of a coal mine in Yanzhou mining area,the model test was used to monitor and study the variation law of the movement and deformation indexes of the surface and overlying strata in each layer during the mining process.The continuous deformation stage after the end of mining was explored.The results show that the proportion of the movement and deformation value caused by the compression of the unconsolidated layer affected by mining increases in the overall movement and deformation.Under the condition of 2.2 m mining thickness of coal seam,the maximum subsidence value of post-mining surface is 1447.6 mm and the maximum horizontal movement value is 394.6 mm.The research results have certain practical significance for the construction land and line planning and location of the mining area.

关 键 词：移动变形 厚松散层 模型试验 

分 类 号：X936[环境科学与工程—安全科学]