水利水电地下洞室围岩分类

The classification of rock mass around tunnel and underground chamber for water conservancy and hydroelectric engineering

本文介绍我国水利水电地下洞室围岩分类的常用方法、存在问题、发展方向,以及几种分类方法中岩体质量与类别的对应关系;认为高地应力、高外水压力条件下的围岩分类方法还不成熟,岩爆与围岩类别的关系、软岩塑性变形对围岩类别的影响等问题还不清楚,尚需进一步探索。

In this paper, the usual methods and main problems of surrounding rock mass classification for water conservancy and hydroelectric engineering in China are introduced, the future development of surrounding rock mass classification is looked ahead, and the correlations between Q-value and other ratings are given. It is pointed out that the classification of surroundjng rock mass in the conditions of high crustal stress and high external water pressure isneeded to be modified. The relations between the rating of surrounding rock mass and rock burst of hard rocks, plastic deformation of soft rocks are not known clearly.