地下洞室围岩分级Q值法、RMR法、BQ法相互关系研究

Study on Mutual Relationships between Surrounding Rock Classifications by Q Value,RMR and BQ Method for Underground Cavern

目前国内外围岩分级方法很多,各分级方法指标的选取及参数的取值差异性明显,导致各方法间的一致性和相互参考性较差。依托锦州地下洞库的工程实例,介绍了围岩分级Q值法、RMR法和《工程岩体分级标准》BQ法,并简单对比分析了各分级指标的差异;对分级结果进行数理分析,得到相互间数学关系;横向比较3种分级结果的可靠性。结果证明:Q值法与RMR法间相关性较好,BQ法对岩体质量的分级偏于保守,综合比选之后认为Q值法和RMR法较适用于实际工程。

There are many methods of surrounding rock classification both at home and abroad in which factors and parameters are different significantly, thus consistency and mutual references between these classifications are poor. In this paper, three methods mentioned above and factors are made a brief introduction and comparison, the mathematical relations between three methods are analyzed comparatively based on the underground oil-storage cavern in Jinzhou. And the reliability of methods is compared laterally. It＇s concluded that the mathematical relation between Q value and RMR method is good; the classification for rock mass in BQ is conservative, Q value and RMR method is fit for practical engineering after comprehensive comparison was taken into consideration.