基于MIDAS和Sagemath的矸石充填开采对地表变形的模拟分析  

Simulation Analysis of Ground Deformation Caused by Gangue Filling Mining Based on MIDAS and Sagemath

作　　者：宰晨凯 吕义清[1] ZAI Chenkai;LYU Yiqing(College of Mining Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学矿业工程学院,太原030024

出　　处：《煤炭技术》2023年第5期85-90,共6页Coal Technology

摘　　要：利用煤矸石进行充填开采,不仅有效解决了矸石堆积等问题,还明显减少了采空区对地表变形的影响。以华晟荣煤矿为背景,基于MIDAS和Sagemath软件,通过软件数值模拟与煤矿地表实际变形监测进行对比,结果表明:利用MIDAS软件模拟,未充填开采时地表最大变形为429 mm;充填开采条件下,地表最大变形为102 mm,地表变形量减小76%。在未充填开采时,地表最大应力为1.24 MPa;充填开采后,地表最大应力为0.51 MPa。垂直方向的岩体应力也明显降低,变为未充填开采时的41.13%。利用Sagemath软件模拟时,100%充填率下地表最大变形为298 mm。2种软件的数值模拟结果与实际观测位移结果大致吻合,可用于煤矿充填开采区的充填效果评价。Filling mining with coal gangue not only effectively solves the problems of gangue accumulation,but also significantly reduces the impact of goaf on surface deformation.Taking Huashengrong coal mine as the background,based on MIDAS and Sagemath software,compare the software numerical simulation with the actual surface deformation monitoring of the coal mine.The results show that the maximum surface deformation is 429 mm when the coal mine is not filled by MIDAS software simulation;under the condition of flling and mining,the maximum surface deformation is 102 mm,and the surface deformation is reduced by 76%.The maximum surface stress is 1.24 MPa in the case of unfilled mining;After flling and mining,the maximum surface stress is O.51 MPa.The rock mass stress in the vertical direction is also significantly reduced,becoming 41.13%of that in unfilled mining.When simulated by sagemath software,the maximum surface deformation under 100%filling rate is 298 mm.The numerical simulation results of the two softwares are in good agreement with the observed displacement results,and can be used to evaluate the flling effect in the filling mining area of coal mine.

关 键 词：矸石 充填开采 数值模拟 实际观测 

分 类 号：TD823[矿业工程—煤矿开采]