虹梯关隧道围岩岩爆分析

Analysis on Rockburst of Hongtiguan Tunnel Surrounding Rock

摘要:

虹梯关隧道隧址围岩以硬质岩为主，该隧道属特长深埋隧道，其附近地质构造也十分发育，工程地质条件复杂，发生岩爆可能性很大。通过对岩爆影响因素的分析，采用水压致裂法地应力测试，经陶振宇判别法、切应力准则等应力判断方法，认为虹梯关隧道隧址部分地段可能会发生轻微～中等岩爆。

Abstract:

The surrounding rock in Hongtiguan tunnel is mainly hard rock, which is an extra long and deep buried tunnel. The geological structure around the tunnel is developed very well, engineering geological conditions are complicated and there is great possibility for rockburst. Through the analysis on influencing factors of rockburst, hydrofracturing method, Taozhenyu method, shear stress criterion were used to test ground stress, the results show that there are occurrance possibilities of weak-moderate rockbursts in this tunnel.