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从分析岩石开挖分级与围岩工程地质分类的划分依据入手,根据国内部分水利水电工程地下洞室围岩的普氏系数(或坚固系数)f与围岩单位弹性抗力系数K0的资料,经线性回归分析得出f、K0之间的统计关系,再根据各类围岩的K0值取值范围,得出岩石开挖分级与围岩工程地质分类的大致对应关系。
Based on the analysis of the classification of rock excavation grading and the geologic classification of the surrounding rock, according to the data of the Platnik coefficient (or strong coefficient) f and the elastic resistance coefficient K0 of the surrounding rock of the underground cavern in some domestic water conservancy and hydropower projects, The linear regression analysis shows the statistical relationship between f and K0. Based on the range of K0 values for various types of surrounding rock, the corresponding correspondence between the rock excavation grading and the geologic classification of the surrounding rock is obtained.