Construction Technology of Comprehensive Prevention for Rock Burst in the Jinpingshan Tunnel in Sichuan

Abstract:

The Jinpingshan tunnel project is the key of Jinping hydropower complex, which is located in the high geo-stress area of south-west China with a whole length of about 17.5km and the maximum depth of the tunnel is about 2375m. The length of the section with buried depth over 1500m is about 12875m. The paper introduces the unique characteristics of the project and the comprehensive prevention construction technology by the analysis and study on the rock burst characteristics in Jinpingshan tunnel.