This paper systematically summarizes the results of researching the soft rock classification, attribution and judgement of China′s coal mine drifts;
本文系统地总结了我国煤矿巷道在软岩分类、软岩属性及软岩判定等方面的研究成果；
In this paper, summarized the rock classification methods at home and abroad, and analyzed various rock classification factors of different methods.
本文总结分析了国内外的围岩分级方法，以及各种围岩分级方法所采取的影响因素。
In practice, it indicates that the karst rock classification for this tunnel is reasonable, which can be taken as a reference for other similar projects.
实践表明，本工程岩溶围岩分级是合理的，对其他同类工程可提供借鉴。
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