煤矿安全2024，Vol.55Issue(4)：114-123,10.DOI:10.13347/j.cnki.mkaq.20230074
顶板冲击荷载作用下锚网支护巷道变形破坏规律研究
Study on deformation and failure law of bolt-mesh support roadway under roof impact load
摘要
Abstract
In order to study the deformation and failure law of bolt-mesh support roadway under roof impact load,taking 250104 transport roadway of Huating Coal Mine as background,FLAC3D was used to analyze the variation characteristics of stress,deforma-tion and plastic zone of surrounding rock of bolt-mesh support roadway under different impact load wave velocities,angles and off-set distances.The results show that:under the impact of roof load,the plastic zone of roadway roof and rock mass on both sides will gradually expand to upward and both sides,and its maximum displacement will increase exponentially;with the increase of the wave velocity of the roof impact load,the maximum displacement of the roadway roof and two sides will gradually increases exponen-tially;with the increase of impact angle of roof impact load,the maximum displacement of the roadway roof and two sides presents an"S-shaped"growth curve,and the impact angle of 90° has the most adverse impact on the stability of the surrounding rock of the roadway with bolt-mesh support;with the increase of the impact offset distance of roof impact load,the maximum displacement of roadway roof and impact side rock will increase first and then decrease.When the impact offset distances is equal to 5.0 m,it will pose the greatest threat to roadway safety.关键词
冲击荷载/锚网支护/变形破坏/冲击波速/冲击角度/冲击偏轴距Key words
impact load/bolt-mesh support/deformation and failure/impact wave velocity/impact angle/impact offset distance分类
矿业与冶金引用本文复制引用
杨宏飞,林志斌,杨大方..顶板冲击荷载作用下锚网支护巷道变形破坏规律研究[J].煤矿安全,2024,55(4):114-123,10.基金项目
国家自然科学基金资助项目(51874119) （51874119）
