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RMR法是当前常用的围岩分类方法之一,但当围岩中存在多组不同性状的节理时,节理间距、性状及方向修正系数3项指标的评分会出现标准不统一的问题。通过综合考虑多组节理的影响,对此3项指标的评分进行了修正,提出了加权平均的评分计算方法,对每组节理赋于不同的权重,由此获得了符合实际情况的修正RMR围岩分类方法,并成功应用到了厄瓜多尔CCS水电站地下厂房围岩分类中。相关研究方法可以为类似工程围岩分类提供参考。
The RMR method is one of the commonly used surrounding rock classification methods. However, when there are multiple groups of joints with different traits in the surrounding rock, there are some problems that the criteria are not unified when the pitch, trait and direction correction coefficient of the joints are scored. By comprehensively considering the influence of multi-groups of joints, the scores of these three indexes are modified, and a weighted average method of calculating the scores is proposed, which assigns different weights to each group of joints, and thus a modified RMR range Rock classification method, and successfully applied to the classification of the surrounding rock of the underground powerhouse of Ecuador CCS hydropower station. The relevant research methods can provide reference for similar engineering surrounding rock classification.