rock mass rating

Modification of slope height coefficient in highway slope rock mass rating

公路边坡岩体分级中坡高修正系数的改进

Standard for engineering classification of rock masses ( GB50218-94), the rock engineering geological classification of Code for water resources and hydropower engineering geological investigation ( GB50267-99), Rock Mass Rating system ( Bieniawski, 1973) and Q-system were used in the rock mass quality classification.

采用工程岩体分级标准（GB50218-94）、水利水电围岩工程地质分类（GB50267-99）、岩体地质力学RMR分类及岩体质量指标Q系统围岩分类，对左岸地下洞室区围岩按其基本指标作出定量化评分、分级。

The multi-factors classification included the MZ ( Modified Z System), the Rock Mass Rating ( RMR) and the Rock Tunnelling Quality Index ( Q) classification.

多因素分级法包括MZ分级（修正的Z系统）、RMR及Q系统分级。