块体理论赤平解析法的节理裂隙岩体破坏预测分析

摘要

杏山铁矿区域的节理裂隙比较发育,且具有F9断层等大构造,分析巷道开挖围岩稳定性非常必要.在区域工程地质条件和结构面调查研究基础上,运用块体理论赤平解析法分析了巷道开挖面在F9断层、优势节理面J1和J2的影响下形成的可动块体,并对可动块体的滑动形式进行了研究.可动块体及滑动形式的研究,为巷道围岩失稳预测及其支护提供了理论依据.%In Xingshan iron mine, the faults and fractures are very developed, which includes several big tectonic structures, such as fault F9. So, stability analysis of the rockmass is necessary. Based on investigation of the engineering geological condition and weak structures, the stereo-analytical method based on block theory is used to analyze the movable blocks in rockmass formed under influence of fault F9 and joints J1 , J2 during excavation of roadways. The sliding mode of the movable blocks is also studied. The study on sliding mode of the movable blocks provides a basis for prediction of failure and support design of the rockmass.