复杂应力条件下不同断面尺寸巷道变形破坏规律  

Deformation and failure law of roadway with different section dimensions under complex stress conditions

作　　者：杨尚欢 梁深林 吴振宇 郭奇峰[2] YANG Shanghuan;LIANG Shenlin;WU Zhenyu;GUO Qifeng(Sanshandao Gold Mine,Shandong Gold Mining Industry(Laizhou)Co.Ltd.,Laizhou 261400,China;School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]山东黄金矿业(莱州)有限公司三山岛金矿,山东莱州261400 [2]北京科技大学土木与资源工程学院,北京100083

出　　处：《矿冶》2024年第2期189-196,共8页Mining And Metallurgy

基　　金：国家重点研发计划项目(2021YFC3001301)。

摘　　要：以三山岛金矿深部开采为研究背景,在现场实测基础上,利用FLAC3D数值分析软件对千米深部不同尺寸断面巷道进行数值模拟,旨在研究复杂应力条件下不同断面尺寸巷道围岩的应力和变形的变化特征。研究结果表明:随着巷道断面尺寸的增大,应力不断向围岩深部集中,巷道周边的最大主应力和最小主应力总体呈增长趋势,最大主应力的变化趋势大于最小主应力;在不同断面尺寸巷道中,垂直主应力分布均在巷道两帮出现集中,而水平主应力分布均在巷道顶板处出现集中;此外,巷道尺寸大小对深部巷道围岩变形影响显著,随着巷道断面尺寸的增大,巷道围岩变形量呈增大趋势。Taking the deep mining situation of Sanshandao Gold Mine as a research background,based on the on-site measurement results,the FLAC3D numerical analysis software has been used to simulate the thousand-deep roadways with different section sizes,aiming to study the stress and deformation characteristics of surrounding rock of roadways with different section sizes under complex stress conditions.The results show that with the increase of the cross-section size of the roadway,the stress continues to concentrate in the deep surrounding rock.The maximum and minimum principal stresses around the roadway generally increase with the increase of the roadway section size.The change trend of the maximum principal stress is greater than that of the minimum principal stress.In different section sizes,the vertical principal stress distribution is concentrated on the two sides of the roadway,while the horizontal principal stress distribution is concentrated on the roof of the roadway.In addition,the size of the roadway significantly influences the deformation of the surrounding rock of the deep roadway.With the increase of the cross-section size of the roadway,the deformation around the roadway increases.

关 键 词：深部开采 巷道 断面尺寸 数值模拟 应力 应力分布 变形 

分 类 号：TD322[矿业工程—矿井建设]