Study on numerical analysis of rockburst and primary support time in Cangling Tunnel

WANG Bo; HE Chuan; YU Tao

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Study on numerical analysis of rockburst and primary support time in Cangling Tunnel

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- Study on numerical analysis of rockburst and primary support time in Cangling Tunnel
- Vol. 28, Issue 6, (2007)
- 作者机构：
  
  西南交通大学土木工程学院地下工程系,成都,610031
- 作者简介：
- 基金信息：
- DOI：
  CLC： TD235
- Online First：13 September 2013，
  
  Published：2007
- 稿件说明：
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WANG Bo, HE Chuan, YU Tao. Study on numerical analysis of rockburst and primary support time in Cangling Tunnel[J]. 2007, 28(6).
DOI：

WANG Bo, HE Chuan, YU Tao. Study on numerical analysis of rockburst and primary support time in Cangling Tunnel[J]. 2007, 28(6). DOI：

摘要

从隧道的开挖方式及开挖后洞周应力逐渐调整这一实际状况出发，选取了具有典型代表意义的断面进行数值分析，并预测整个计算范围内岩爆的状况。通过计算分析可知，随着应力释放系数的逐渐加大，岩爆发生的区域及等级不断增加。为有效防止或降低岩爆发生的可能，分析现场的监控量测资料后，确定了本隧道不同地段的最佳支护时机。

Abstract

According to the excavation style and gradually adjusting of the stress after excavation in the tunnel

some typical sections are chosen to numerically analyze and forecast the status of rockburst in the whole calculational scope. According to the calculational result

some conclusions can be drawn as follows: the larger of the stress releasing coefficient has become

the area and the grade of rockburst would increase. For effectively avoiding or reducing the occurring of rockburst

the most prime support times for the different areas are given by analyzing the measuring data in-situ in this tunnel.

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