Based on an hydraulic power engineering in high primary stress case, this paper use classification methods BQ, HC, RMR and Q system in turn to determine the quality grade of surrounding rock.

• 文章结合某水电工程实例，先后采用BQ分类、HC分类、RMR分类以及Q系统分类方法，分别就4种方法分类结果的相关性、吻合率和一致性等方面开展了系列对比研究和初步的成因分析。