摘要
采用UDEC程序模拟了不同地应力条件下,巷道节理发育围岩裂隙的分布特征.模拟结果显示,围岩裂隙分布范围与地应力侧压系数大小密切相关,侧压系数较小时,帮部裂隙范围较大,侧压系数较大时,顶板裂隙范围较大.模拟了侧压系数为1.5的情况下,不同支护方案对围岩裂隙的限制作用,结果显示高预应力锚杆支护能有效控制围岩裂隙扩展,并能减小浅部裂隙的张开程度,有效提高巷道节理发育围岩的整体稳定.
The surrounding rock fracture distributing characteristics of roadway joint development was simulated under different under- ground stress environment by adopting UDEC program. The simulation result shows that the fracture distributing range is closely related with lateral pressure coefficient. The side wall＇ s fracture distributing range is larger when the lateral pressure coefficient is small, while the roof＇ s fracture distributing range is larger when the lateral pressure coefficient is large. Then the restrictions of various support pro- jects to fracture were simulated when the lateral pressure coefficient was set as 1.5. The simulation results show that high pre-tensioned bolt support can effectively control the fracture propagation of the surrounding rock, and it can reduce the openness of the shallow frac- ture and improve the overall stability on surrounding rock of roadway joint development.
出处
《内蒙古科技大学学报》
CAS
2016年第2期103-106,共4页
Journal of Inner Mongolia University of Science and Technology
关键词
巷道
软弱围岩
裂隙分布
围岩支护
数值模拟
roadway
weak surrounding rock
fracture distribution
surrounding rock support
numerical simulation
