摘要
针对下向进路式充填法转无底柱分段崩落法开采的矿山上部覆岩冒落的情况,采用FLAC3D数值模拟技术,对覆岩冒落的影响因素进行分析。所选取的因素有顶板暴露面积、埋深、顶板形状、侧压系数等4个方面。研究结果显示采空区上部塑性区的体积随着埋深和采空区顶板暴露面积的增加而增大,当采空区顶板为正方形时,采空区上部所产生的塑性区的体积最大,最容易冒落。随着测压系数的增加采空区上部所产生的塑性区体积出现先增加后降低最终趋于稳定的趋势。
For the case of the overlying rock falling in the upper part of the mine,the FLAC3D numerical simulation technology was used to analyze the influencing factors of overburden collapse.The selected factors include the top exposed area,the buried depth,the shape of the top plate,and the lateral pressure coefficient.The results show that the volume of the plastic zone in the upper part of the goaf increases with the depth of the burial depth and the exposed area of the goaf.When the roof of the goaf is square,the volume of the plastic zone generated in the upper part of the goaf is the largest.The easiest to fall.With the increase of the pressure measurement coefficient,the volume of the plastic zone generated in the upper part of the goaf increases first and then decreases,and finally tends to be stable.
作者
李光
张军
任海龙
张洪昌
李广辉
孙宇超
Li Guang;Zhang Jun;Ren Hailong;Zhang Hongchang;Li Guanghui;Sun Yuchao(Yanqianshan Branch of Ansteel Mining Co.,Ltd.;School of Resources and Civil Engineering,Northeastern University;Environment and Resources Institute of Southwest University of Science and Technology)
出处
《现代矿业》
CAS
2020年第3期36-38,52,共4页
Modern Mining
关键词
数值模拟
覆岩冒落
影响因素
塑性区体积
Numerical simulation
Overlying rock caving
Influence factor
Plastic volume
