采矿与安全工程学报2017，Vol.34Issue(1)：9-15,7.DOI:10.13545/j.cnki.jmse.2017.01.002
复杂结构大断面硐室围岩稳定控制研究
Study on surrounding rock stability control in large section chamber with complex structure
摘要
Abstract
In order to solve the problem of surrounding rock control in large section chamber with complex structure,the deformation characteristics of unloading chamber upper of coal bunker were analyzed through FLAC3D numerical simulation,and surrounding rock control technology of zonal cou-pling and intensive support was put forward.The results have shown that large excavation area and complex structure lead to the large area and unsymmetrical failure;the plastic zone reaches the depth of 13.5 m;the shallow surrounding rock is tensile-shear failure whose bearing capacity declines signifi-cantly,while the deep surrounding rock is shear failure whose bearing capacity decreases to a lesser ex-tent;and failure of the arch of chamber and narrow rock pillar is particularly serious,so they are the key parts of surrounding rock control.Facing the above-mentioned unsymmetrical failure characteristics of the surrounding rocks,the control methods of "surrounding rock control in stages,zonal coupling sup-port,and intensive support and close support for key parts" were put forward.These methods can achieve the coupling of the support structure and the mechanical characteristics of surrounding rock to control its deformation and failure effectively.关键词
复杂结构/大断面/非均称破坏/围岩控制/耦合支护Key words
complex structure/large section/unsymmetrical failure/surrounding rock control/coupling support分类
矿业与冶金引用本文复制引用
肖同强,李化敏,王桂生,王文,蒋绍永..复杂结构大断面硐室围岩稳定控制研究[J].采矿与安全工程学报,2017,34(1):9-15,7.基金项目
国家自然科学基金项目(51304065) （51304065）
河南省教育厅科学技术研究重点项目(14A440004) （14A440004）
河南理工大学博士基金项目(B2012-081) （B2012-081）
