铁路专线下综放开采地表沉陷规律  

Surface subsidence law caused by fully mechanized caving mining under railway

作　　者：邓念东[1] 姚婷 尚慧[1] 刘东海 DENG Niandong;YAO Ting;SHANG Hui;LIU Donghai(College of Geology&Environment,Xi’an University of Science and Technology,Xi’an 710054,China)

机构地区：[1]西安科技大学地质与环境学院

出　　处：《煤田地质与勘探》2019年第6期121-125,134,共6页Coal Geology & Exploration

基　　金：国家自然科学基金项目(41702377);中国博士后科学基金项目(2017M623208);陕西省自然科学基础研究计划项目(2017JQ4008)~~

摘　　要：为了保障山西郭庄煤矿铁路专用线的安全运营,通过建立岩移观测站,在收集整理监测数据的基础上,对铁路专用线经过的山西常村煤矿S3-13工作面采动引起的地表移动变形规律进行了分析。研究结果表明:综放开采条件下,地表移动变形剧烈,下沉值大,但下沉速度相对较小;地表下沉系数较大(0.76),主要影响角正切tanβ偏大(2.78),最大下沉角较大(89°);地表移动总持续时间长,活跃期时间占比58.7%,活跃期下沉量占总下沉量的89%,活跃期变形剧烈且集中。研究成果旨在为后期工作面开采过程中铁路的变形预测及维修防治提供理论依据。In order to ensure the safe running of the special railway for Guozhuang coal mine,the law of surface movement and deformation in goaf of the coal mine was studied on the basis of the analysis of the actual observation data,the monitoring scheme and control measures of railway under dynamic coal mining conditions were put forward in accordance with that.The results show that the surface movement and deformation are intense,the subsidence value is large,but the subsidence velocity is relatively small on account of fully mechanized caving;Surface subsidence coefficient,the main impact tangent tanβ,maximum subsidence angle are 0.76,2.78,89°.The total duration of surface movement is long,with the time of active period accounting for 58.7%and the subsidence amount in active period accounting for 89%of the total subsidence amount.Therefore,monitoring and prevention should be strengthened during active period.

关 键 词：铁路下采煤 综放开采 地表移动 变形规律 

分 类 号：TD325[矿业工程—矿井建设]