摘要
运用东北大学开发的RFPA2D程序模拟原岩应力变化时巷道围岩破坏过程,了解无裂纹巷道围岩破坏形式与原岩应力的关系。根据模拟结果,在垂直应力大于水平应力的情况下,破坏主要在巷道侧面上发生。反之,在巷道顶板和底板发生。2个应力之比越大,这样的现象越明显。2个应力相同的情况下,在巷道顶底板和两帮都发生破坏。因此巷道破坏形式与垂直水平应力之间的比值有关而与应力大小无关。
The relationship between the failure of the tunnel and initial stress field is known by the method where the failure processing in different initial stress fields is simulated by using RFPA2D developed by Northeastern University.According to the simulation result,in the condition of vertical stress greater than horizontal stress,the failure occurs in lateral wall of the tunnel.On the other hand,the failure occurs in the roof and bottom.The greater the ratio between two stresses is,the stronger such trend is.The failure simultaneously occurs in the roof,lateral wall and bottom when the vertical stress is same with the horizontal.In other word,the failure type of tunnel is in connection with the ratio of two stresses and not related to the level of stress.
出处
《金属矿山》
CAS
北大核心
2011年第10期31-35,共5页
Metal Mine
基金
国家自然科学基金项目(编号:50874024
10872046
50904013)
教育部重点科技项目(编号:107033)
教育部博士点基金项目(编号:200801450003)
教育部直属高校基本科研业务费团队项目(编号:NO90101001)
