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金属矿山 ›› 2010, Vol. 39 ›› Issue (01): 28-30+50.

• 采矿工程 • 上一篇    下一篇

爆破震动对巷道稳定性影响研究

刘炜1,2,宋卫东1,赵炳祁3,陈勇4   

  1. 1北京科技大学;2广西大学;3东北大学;4核工业第四研究设计院
  • 出版日期:2010-01-15 发布日期:2010-11-09

Study on the Impact of Blasting Vibration on Tunnel Stability

 LIU  Wei1,2, SONG  Wei-Dong1, ZHAO  Bing-Qi3, CHEN  Yong4   

  1. 1University of Science and Technology Beijing;2Guangxi University; 3Northeastern University;4The Fourth Institute of Unclear Engineering
  • Online:2010-01-15 Published:2010-11-09

摘要: 为研究爆破震动对巷道稳定性影响,运用有限元法建立爆破加载模型,采用ANSYS软件就瞬态动力大小、作用时间和作用范围对巷道围岩应力场及表面位移的影响,对巷道稳定性进行分析。结果表明,单段药量越大、作用时间越长、采区越接近监测巷道时,巷道岩体位移越大;在爆破震动作用下,巷道侧帮产生压应力集中,易发生破坏,巷道顶板出现拉应力作用,易引起拉伸破坏;爆破震动对工程在Y方向的影响远远大于在X方向的影响。

关键词: 爆破震动, 有限元法, 应力, 位移

Abstract: In order to study the influence of blasting vibration on tunnel stability,a blasting model is established by the finite element methodThe effect of the dynamic force,reaction time and span on the stress field of tunnel wall-rocks and the surface displacement is analyzed by ANSYS softwareThe result shows that the displacement of tunnel is larger as the weight of explosive becomes larger,the reaction time is longer,and the distance is nearer to the tunnelUnder the blasting vibration,the side wall of tunnel can easily lead to collapse because of the concentrated stressThe influence of blasting on Y-direction is much larger than that on X-direction

Key words: Blasting vibration, Finite element method, Stress, Displacement