5.2.1 Geological inspection of surrounding rocks of caverns mainlyincludes the followings.(1) Excavation progress, procedures, methods, techniques and theirinfluences on surrounding rocks.(2) Distribution and nature of strata (mainly soft rocks and swelli    （共 2992 字）     [阅读本文] >>

        5.2.1 Geological inspection of surrounding rocks of caverns mainlyincludes the followings.(1) Excavation progress, procedures, methods, techniques and theirinfluences on surrounding rocks.(2) Distribution and nature of strata (mainly soft rocks and swelli    （共 2992 字）     [阅读本文] >>