Numerical simulation analysis of rock anchor beam blasting considering damage effect

ZHANG Cheng-liang; LI Xin-ping; DAI Yi-fei

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Numerical simulation analysis of rock anchor beam blasting considering damage effect

更新时间：2026-06-25

- Numerical simulation analysis of rock anchor beam blasting considering damage effect
- Vol. 28, Issue S1, (2007)
- 作者机构：
  
  1. 昆明理工大学国土资源工程学院,昆明,650093
  2. 武汉理工大学道路桥梁与结构工程湖北省重点实验室,武汉,430070
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU94
- Online First：28 March 2014，
  
  Published：2007
- 稿件说明：
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ZHANG Cheng-liang, LI Xin-ping, DAI Yi-fei. Numerical simulation analysis of rock anchor beam blasting considering damage effect[J]. 2007, 28(S1).
DOI：

ZHANG Cheng-liang, LI Xin-ping, DAI Yi-fei. Numerical simulation analysis of rock anchor beam blasting considering damage effect[J]. 2007, 28(S1). DOI：

摘要

在地下厂房岩锚梁爆破施工中，为获得良好的开挖轮廓面和较小的损伤区，常采用光面爆破的开挖方式，但在光面爆破施工中，主爆孔爆破对光爆层岩石造成较大程度的损伤，使岩石的力学参数发生变化，而在爆破设计与施工中未考虑这种损伤效应，结果造成单孔装药量偏大，岩石受到过度破坏，出现超挖或产生大量的爆振裂隙。应用动力有限元程序，建立岩体二维弹塑性模型，对不考虑损伤和考虑损伤的光面爆破过程进行了数值模拟，并比较两种模型最大有效应力随距离的变化关系。研究结果表明，在相同情况下，考虑损伤影响时可适当加大光面爆破的炮孔间距和抵抗线。在现场进行了考虑爆破损伤和未考虑爆破损伤的两组爆破试验，观察爆后效果表明：考虑爆破损伤效应的参数设计爆破效果好、损伤作用小。

Abstract

Smooth blasting is generally used to excavate rock anchor beam at the underground power station

its aim is to better quality and smaller crushed region. However

the blasting of the main hole damages the smooth layer to a certain extent to reduce the mechanical parameters of rock mass. The more powder is charged each hole and rock mass is over excavation or generate lots of cracks without considering this effect of damage. The 2D dimension elastic-plastic model of rock mass is adopted and the smooth blasting procedures with and without this damage are simulated in the dynamic finite program. According to the results of comparison of maximum effective stresses of different distance of 2 kinds of models

when the effect of this damage is considered

the interval of holes and the burden can be widened under the same condition. The model considering damage is proved by in-site blasting experiment well.

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