软岩巷道爆破卸压方法的研究与实践

Study and practice for method of destress blasting in soft rock tunnel

本文应用二维元与边界元相结合 ,对爆破卸压巷道围岩的卸压效果进行了分析和计算 ,得出了巷道围岩运动趋向及巷道周边应力升高区向巷道围岩深部转移的规律 ,为巷道的支护设计及巷道维护提供了重要的参考。

The paper applied the combination of two dimensional element and boundary element and made an analysis and calculation for the effect of destress blasting tunnel. It comes to the motion tendency of tunnel's surrounding rock and law of transferring boundary stress heightening area to deeper area in tunnel's surrounding rock, which will play an important role in tunnel's supporting designing and maintenance.