欢迎访问《金属矿山》杂志官方网站,今天是 分享到:

金属矿山 ›› 2011, Vol. 40 ›› Issue (03): 50-52+94.

• 采矿工程 • 上一篇    下一篇

层状节理巷道分步开挖离散元模拟

李鹏,黄德镛,翁春林   

  1. 昆明理工大学
  • 出版日期:2011-03-10 发布日期:2011-03-11

Discrete Simulation on the Step Excavation of Layered Jointed Rock Tunnel

Li Peng,Huang Deyong,Weng Chunlin   

  1. Kuming University of Technology
  • Online:2011-03-10 Published:2011-03-11

摘要: 依据现场节理调查结果划分单元建立计算模型,采用三维离散单元法对巷道分步开挖全过程进行模拟,研究层状节理巷道三维应力场空间变化规律。结果表明,当掘进面接近和通过某一断面时,巷道断面对平面σxxσyy空间主应力的影响范围约为2.0B(B为巷道净宽)。

关键词: 层状节理, 巷道, 应力场, 数值模拟, 离散元

Abstract: To study three-dimensional spatial variation of stress field for layered jointed rock tunnel,a calculation model was established under different partitions according to the on-site joint statistics.And the entire process of tunnel excavation step was simulated by three-dimensional discrete element method.The result showes that when the tunnel face approaches to and passes through a cross section,the influence area of the tunnel section on spatial principal stress and plane stress,was about  2.0 BB-span length).

Key words: Layered jointed, Tunnel, Stress field, Numerical simulation, Discrete element