The paper introduces evaluation standard and the operation method of surrounding rock classification in Hydroelectrics

RMR and Q system

using the three classification method to get the classifiction result of the surrouding rock in a southwest hydroelectric powerstation and the correlation analysis among the three results

then draw the scientific and reasionable conclusion in classification of the hydroelectric power stration.According to the appraisal results

zoning maps of rock qualify at different levels and different areas of appraisal survey are made

which explicitly indicates the character of the rock mass in the areas and confirms the fitness and oneness.Based on the plenty surveys and the acquaintance of files

the actual indications and using methods are accessed in geologic rock classification in engineering.