雪峰山隧道岩爆问题预测研究

Predictive of rockburst in the Xufeng mountain express highway tunnel

通过对雪峰山隧道的工程地质条件、地应力场的研究 ,并结合岩石力学试验研究 ,运用地质综合分析和σθ/Rb判据这两种较为适用、有效的预测方法 ,对雪峰山隧道的岩爆问题进行了预测研究。预测结果表明 ,雪峰山隧道不会出现高烈度的岩爆 ,但某些地段可能出现Ⅰ级或Ⅱ级的岩爆。

In the paper, the predicting of rockburst in the Xuefeng mountain express highway tunnel has been given by using of two effective measures of forecasting —geology complex forecast method and σ θ/Rb judging method, through study of engineering geology conditions and geostress field of the tunnel and rock mechanics experiment. The result is that the probability of high tensity rockburst in the tunnel is non-existent and the probability of low grade and moderate tensity rockburst in the tunnel is existent. It has supplied design basis for the tunnel.