Effect Analysis of Multiple Factors Comprehensive Scoring Methods of the Rock Mass Quality

Rock mass is the key to evaluate the stability of rock mass.This article briefly described the scoring methods of multiple factors including rock mass surrounding rock of water conservancy and hydropower engineering geology classification,RMR rock mass classification,and Barton system classification.Taking an excavation face on the right bank foundation of a southwest hydroelectric power station as an example,in comprehensive consideration of the multiple factors which were consist of rock strength,groundwater,crustal stress,structural plane parameters,engineering geology character,weathering unloading and borehole date and so on,the consistency and accuracy of different rock mass quality multiple factors grading methods in rock mass quality classification multiple factors were discussed.The results show that the main granite dam foundation excavation,rock mass classification by RMR rock mass classification or Barton system classification is more accurate,and has good correlation.