某矿山巷道交岔口的三维有限元模拟分析  

Three-Dimension Numerical Simulation Analysis on the Inter Section of the Tunnels

作　　者：赖小彬[1] 徐小敏[1] 张伯虎[1] 卢萍[1] 

机构地区：[1]重庆大学土木工程学院

出　　处：《地下空间与工程学报》2007年第4期633-636,共4页Chinese Journal of Underground Space and Engineering

基　　金：国家科技攻关计划"西部开发行动"重大项目(2004B901A02)

摘　　要：建立了包含多个交叉巷道的三维模型并对其进行了计算分析,研究了巷道之间的相互影响和交岔点的稳定性。结果表明,巷道之间的相互影响基本集中在巷道周围2倍的巷道尺寸范围内。巷道交岔点处出现明显的应力降低区,应力分布出现较大的起伏。巷道交岔点附近两侧墙体上的应力发生明显的分异,弯道处的应力起伏也较显著。在交叉口处,应尽量避免相交部分过于尖锐,以避免产生明显的应力集中,而尖角的消去对应力的分布有一定的改善作用。The 3 - D models of several crossing tunnels are established and analyzed in this paper. The interaction of the tunnels and the stability of the crossing point are studied. It shows that the interaction of the tunnels only lies in the district of two times of the tunnels ＇ dimension. There are some visible stress decreasing districts at the crossing of the tunnels. It is found that the value of the stresses distribution changes greatly at the crossing of the tunnels. The stress of the sidewall near the crossing are diverse and the stresses in the curve of the tunnels are undulate. The stress concentration in the intercross can be avoided if the edge of the intercross would be weakened, which can improve the distribution of the stress.

关 键 词：相互作用 交岔点 应力降低 连续性 

分 类 号：TU457[建筑科学—岩土工程]