块体理论赤平解析法在龙滩水电站地下厂房洞室群稳定分析中的应用

龙滩水电站地下厂房开挖区域岩体不连续面发育，确定厂房开挖面是否可能产生可动块体并判断其稳定性具有重要实际意义。块体理论是适用于分析断层、节理发育破碎刚性岩体稳定性的有效方法，在对场区工程岩体勘察资料的详细研究基础上，运用块体理论赤平解析法分析龙滩水电站地下厂房洞室群的稳定性，对各开挖面构成可能移动块体的不连续面分布情况进行较系统的评价，得出厂房各部分可动块体分布的直观统计结果，为设计有效的加固方案提供了依据。

APPLICATION OF STEREO-ANALYTICAL METHOD FOR BLOCK THEORY TO THE STABILITY OF LONGTAN HYDROPOWER STATION UNDERGROUND POWER-HOUSE

There are a lot of discontinuous planes in rock mass of Longtan hydropower station underground power-house,so it is of practical value to make certain whether there are unstable blocks on excavation planes where faults and joints interlace with each other. Block theory is an effective and reliable engineering analysis method for the stability of faulted and jointed fractured rigid rock masses. This paper deals with the stability of Longtan hydropower station underground power-house with stereo-analytical method for block theory on the basis of detailed investigation of its rock mass data,and systematically calculates the numbers of possible moveable rock masses which are induced by all rock discontinuous plane and every excavation plane of cavern groups. The obvious statistical distribution result is obtained to offer basis on designing effective reinforcement option.