摘要
以平煤6矿斜井穿越采空区为工程背景,通过U型钢支架变形破坏机理的分析,结合数值模拟,对不同支护方案下斜井围岩的稳定性进行了系统研究。结果表明,采用全断面U型钢支护破碎围岩巷道时,巷道的最大垂直应力得到较大改善,巷道顶板、底板处于低应力区域,破坏不严重,在控制底板围岩位移量方面,全断面U型钢支护的底板围岩位移量为锚杆支护的0.47倍。表明刚性U型钢支护技术能有效地控制破碎围岩巷道的围岩稳定性。
Take the inclined shaft of Pingdingshan No.6 coal mine as the engineering background,through the analysis of deformation failure mechanism of U-steel support, combined with numerical simulation, the stability of surrounding rock of inclined shaft under different support schemes is systematically studied. The results show that the maximum vertical stress of roadway is greatly improved when U-steel is used to support broken surrounding rock roadway. The roof and floor of roadway are in low stress area, and the damage is not serious. In terms of controlling the displacement of the floor rock, the displacement of the floor surrounding rock of the full section U-steel support is 0.47 times larger than that of the bolt support. It is shown that the rigid U-steel support technology can effectively control the stability of the surrounding rock of the broken surrounding rock roadway.
作者
李世忠
彭文庆
LI Shi-zhong;PENG Wen-qing(Wuhan Design and Research Institute Co.,Ltd.,China Coal Technology and Engineering Group,Wuhan 430064,China;School of Resource Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan 411201,China)
出处
《煤炭技术》
CAS
北大核心
2021年第4期1-4,共4页
Coal Technology
基金
国家自然科学基金重点基金项目(51434006)
湖南省教育厅优秀青年项目(18B226)。
关键词
U型钢支护
破碎软弱围岩
数值模拟
刚性
U-steel support
broken and soft surrounding rock
numerical simulation
rigidity
