The Application of Stereo-Analytical Method for Block Theory to the Stability Analysis of Longtan Hydropower Station Underground Power-House

摘要

There are a lot of discontinuous planes in rock mass of Longtan hydropower station site. It is of practical value to make certain whether there are movable blocks on excavation planes and judge their stability. Block theory is an effective method to analyze the stability of fractured rigid rock masses with faults and joints. By detailed investigation of the rock mass data, Stereo-analytical method for Block theory is used to analyze stability of Longtan hydropower station underground power-house, and the distribution of the discontinuities induced by the excavation is systematically evaluated. Obvious statistical distribution result of the movable blocks is given, and helpful advice for designing schemes for reinforcing moveable blocks is put forward. Thus, this method provides a reference to design effective reinforcing schemes.