摘要
研究倾斜产状软弱夹层从不同部位贯穿巷道对巷道围岩稳定性的影响,利用FLAC3D软件分析相同条件下无软弱夹层、软弱夹层贯穿巷道顶部、中部、底部四种模型中软弱夹层对巷道围岩位移场、应力场以及塑性区的影响。数值结果对比表明:软弱夹层的存在导致巷道围岩整体位移场、应力场分布不均匀,塑性区范围增加,存在软弱夹层的部位容易发生大变形,相对来说软弱夹层贯穿巷道顶部时巷道的顶板稳定性最差。现场的巷道变形观测也验证了数值模拟的分析结果。
The paper studied the inclined occurrence soft weak partings ＇affected to the stability of the surrounding rock ahmg ttle mine roadway when the partings passing through from different locations. The lac3D software was applied to analyze the soft weak partings affected to the surrounding rock displacement field, stress field and plastic zone of the mine roadway in the hur models that no soft and weak partings soft and weak partings passed through the top, middle and bottom of the roadway under the same conditions, the numerical results comparison showed that the soft and weak partings existed caused uneven distribution of the integrated displacement filed and stress field in the surrounding rock of the mine roadway and caused the scope of the plastic zone increased, large deformation could be easy occurred at the soft and weak partings. Relatively, when the soft and weak partings passed through the top of the mien roadway, the stability of the roof would poor. The site deformation observation of the mien roadway verified the analysis results of the numerical simulation.
出处
《煤炭工程》
北大核心
2013年第5期89-92,共4页
Coal Engineering
基金
河南理工大学硕士学位创新基金资助项目(2011-M-43)
关键词
倾斜产状
软弱夹层
贯穿巷道
大变形
围岩稳定性
inclined occurrence
soft weak partings
through mine roadway
stability of surrounding rock
