This book is one of the series of "International Top-level Forum on Engineering Science and Technology Development Strategy", arounding the theme of "Safe Construction and Risk Management of Major Underground Engineering". The Forum was organized by the Chinese Academy of Engineering(CAE), and was jointly sponsored by the Engineering Management Academic Division of the CAE etc. in May 2012. Three key subjects were discussed in this book: cataclysm mechanism and regulating systems, design theory and methods, safety risk evaluation theory and a management system for significant underground engineering under complicated geologic and environmental conditions.