采动条件下陷落柱构造对基岩与地表沉降影响数值分析  

Numerical analysis of the influence of collapse column on bedrock and surface subsidence during mining

作　　者：徐兵 常晋雷 李见波[2] XU Bing;CHANG Jinlei;LI Jianbo(Shanxi Huoerxinhe Coal Mining Company Ltd.,Changzhi,046600,China;School of Safety Engineering,North China Institute of Science and Technology,Yanjiao,065201,China)

机构地区：[1]山西霍尔辛赫煤业有限责任公司,山西长治046600 [2]华北科技学院安全工程学院,北京东燕郊065201

出　　处：《华北科技学院学报》2022年第3期14-19,共6页Journal of North China Institute of Science and Technology

基　　金：中央高校基本科研业务费资助项目(3142018021)。

摘　　要：地表移动变形受多种地质和采矿因素的影响,是一个非常复杂的时空力学过程。为研究采动作用下陷落柱构造对地表异常沉降的影响,以霍尔辛赫煤矿地质条件为背景,建立采动条件下陷落柱影响煤层上覆基岩变形和地表下沉数值模型,开展陷落柱对地表沉陷影响机制研究。理论分析了陷落柱对关键基岩层的破断影响机制;数值解答了陷落柱影响下围岩应力场和位移场变化规律以及陷落柱影响下地表下沉形态,计算结果表明陷落柱区域地表沉陷值大于无陷落柱时的沉陷值。该研究为类似矿区的地表异常沉陷研究提供了参考。The movement and subsidence of surface is a very complex spatio-temporal mechanical process affected by many geological and mining factors.In order to study the influence of collapse column structure on surface abnormal subsidence during mining,based on the geological conditions of Huoerxinhe Coal Mine,a numerical model of the overlying bedrock deformation and surface subsidence affected by the collapse column considering mining is established and the influence mechanism of collapse column on surface subsidence is studied.The influence mechanism of collapse column on the failure of key bedrock layers is theoretically analyzed.The variation of stress and displacement fields and the plastic zone of surrounding rock under the influence of collapse column is numerically solved.The pattern of surface subsidence under the influence of collapse column is obtained,and the surface subsidence value in the area of collapse column is greater than that without collapse column.This study provides a reference for the study of surface abnormal subsidence in similar mining areas.

关 键 词：异常沉降 陷落柱 煤矿开采 基岩结构 黄土 

分 类 号：TD322[矿业工程—矿井建设]