摘要
为了研究软岩巷道围岩矿压显现规律,采用FLAC3D数值软件模拟不同侧压系数下,巷道围岩应力、位移和塑性区的变化规律,结果表明:由于侧压系数的不同,巷道开挖后在巷道底板和两帮拐角处出现应力集中,并在两帮中间位置出现了拉应力,最大拉应力为0.013 2 MPa;随着侧压系数的增加,巷道的水平位移大于垂直位移且偏帮严重;整个巷道塑性破坏明显,塑性区主要分布在巷道顶板上0.8 m左右和底板下1 m左右,说明巷道围岩自稳能力差,需要采取支护手段,为研究巷道矿压显现规律提供参考。
In order to study the ground pressure appearance law of soft rock roadway,FLAC3Dwas used to simulate the changes of stress,displacement and plastic zone of roadway surrounding rock under different side pressure coefficient conditions.The results show that: due to the different side pressure coefficients,stress concentration occurs in the roadway floor and the corners of the two sides after excavation,and tensile stress appears in the middle of the two sides.The maximum tensile stress value is 0.013 2 MPa,as the side pressure coefficient on both sides of the roadway increases,the horizontal displacement of the roadway is greater than the vertical displacement,the plastic damage of the whole roadway is obvious.The plastic zone is mainly distributed around 0.8 m above the roof of the roadway and around 1 m below the floor of the roadway.This shows that the surrounding rock has poor selfstabilizing ability after excavation,so it must be supported.The study provides a reference for the appearance of the roadway ground pressure.
作者
李涛
李明亮
单麒源
巩宪辉
刘炜楠
刘伟
Li Tao;Li Mingliang;Shan Qiyuan;Gong Xianhui;Liu Weinan;Liu Wei(School of Mining Engineering,Heilongjiang University of Science and Technology,Harbin 150022,China)
出处
《山西建筑》
2020年第16期61-64,共4页
Shanxi Architecture
基金
2018年度黑龙江省省属本科高校基本科研业务费项目(Hkdcx201801)。
关键词
FLAC^3D
侧压系数
地压显现规律
软岩巷道
FLAC^3D
lateral pressure coefficient
ground pressure appearance law
soft rock roadway
