Systematic pre-study of these problems is very important for selection of dam site, lay out of engineering project, timelimit, cost and safety, etc.

• 系统深入地开展这些问题的研究，将对选坝、工程布置、工期、造价和施工运行安全以及岩体工程地质力学理论的发展都有十分重要的意义。