Study of rock-burst prevention measures based on controlling the super shear stress

YAN Peng; CHEN Xiang-rong; SHAN Zhi-gang; ZHOU Yong

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Study of rock-burst prevention measures based on controlling the super shear stress

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- Study of rock-burst prevention measures based on controlling the super shear stress
- Vol. 29, Issue S1, (2008)
- 作者机构：
  
  中国水电顾问集团华东勘测设计研究院,杭州,310014
- 作者简介：
- 基金信息：
- DOI：
  CLC： O319.56
- Online First：15 April 2016，
  
  Published：2008
- 稿件说明：
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YAN Peng, CHEN Xiang-rong, SHAN Zhi-gang, et al. Study of rock-burst prevention measures based on controlling the super shear stress[J]. 2008, 29(S1).
DOI：

YAN Peng, CHEN Xiang-rong, SHAN Zhi-gang, et al. Study of rock-burst prevention measures based on controlling the super shear stress[J]. 2008, 29(S1). DOI：

摘要

简要介绍了断裂型岩爆的超剪应力理论，初步讨论了爆破开挖扰动对超剪应力的影响，并从控制超剪应力的角度建议了相应的岩爆防治方法，给出了工程实例。研究表明，开挖动态扰动将使断裂两侧岩体在较低的超剪应力条件下就产生滑动，另外，高地应力条件下爆破开挖过程中地应力动态卸载扰动可以引起围岩中动态剪应力的增大，直接增大超剪应力，这两种情况都可能导致岩爆的发生。因此，可从控制爆破扰动的角度来控制岩爆的发生，具体措施有炮孔合理布置、起爆网络的优化和加强支护。

Abstract

The theory of super shear stress is briefly introduced

and the influence of the blasting excavation disturbance on the super shear stress is studied

and then

the rock-burst prevention method based on controlling the super shear stress is advised. Then engineering practices are given. The result shows that the sliding of both sides of fractures can be induced by dynamic excavation disturbance under low super shear stress condition and the super shear stress can also be strengthened by dynamic unloading stress wave during blasting excavation. The two conditions can both lead to rock-burst. So the rock-burst prevention can be carried out based on controlling the excavation disturbance. The measurements include the boreholes arrangement

optimization of initiation network and strengthening the supporting.

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