Taking the engineering rock quality evaluation of a dam foundation rock at the Shuibuya project for example, the application of quality classification of engineering rocks is studied.

结合水布垭水利枢纽大坝建基岩体工程质量评价实例，对岩体工程质量分级的应用进行了研究。

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First, the main factors for the classification of rock quality are selected by carefully analyzing all the influencing factors of rock quality in underground structures.

首先，在全面深入分析地下结构岩体质量影响因素的基础上，确定出其主要影响因素。

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First, the main factors for the classification of rock quality are selected by carefully analyzing all the influencing factors of rock quality in underground structures.

首先，在全面深入分析地下结构岩体质量影响因素的基础上，确定出其主要影响因素。

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