加固底板对深部软岩巷道两帮稳定性影响的数值分析  

Numerical analysis on influence of reinforcing floor on stability of sides in deep soft rock roadways

作　　者：李树清[1] 王卫军[1] 潘长良[1] 杨磊[2] 

机构地区：[1]中南大学资源与安全工程学院,湖南长沙410083 [2]湖南科技大学能源与安全工程学院,湖南湘潭411201

出　　处：《煤炭学报》2007年第2期123-126,共4页Journal of China Coal Society

基　　金：湖南省教育厅一般资助项目(05C174)

摘　　要：通过数值计算,研究了底板支护和注浆加固底板后深部软岩巷道两帮围岩的稳定性.计算结果表明,加固软弱底板后巷道两帮围岩变形量减小,尤其是巷道两帮下部围岩变形量减小幅度较大,两帮围岩塑性区范围和软化区范围缩小,两帮围岩主应力升高区范围缩小,主应力峰值区域更加靠近巷道周边.从而得出:加固软弱底板有利于提高深部软岩巷道两帮围岩稳定性.Through numerical analysis, the stability of surrounding rock in two sides of deep roadway under the conditions of supporting and grouting in the floor was studied. The computation results show that after reinforcing the soft and weak floor, the deformation of the surrounding rock of sides gets smaller, especially, that in the lower part of the sides decreases to a larger extent; the size of plastic zones and the scope of strength-softening region in surrounding rock of sides become smaller; the area that has an increase in the maximal principal stress in surrounding rock of sides shrinks, and the zones of peak-value of maximal principal stress approach the periphery of roadway. The conclusion that reinforcing the soft and weak floor is in favor of the stability of surrounding rock of two sides in deep soft rock roadways is made.

关 键 词：加固底板 深部开采 软岩巷道 稳定性 

分 类 号：TD322.4[矿业工程—矿井建设]