中文摘要：

以柿竹园多金属矿为工程背景，研究确定该矿垂悬部分岩体的岩体力学参数．在工程现场进行实地的节理裂隙调查，对调查结果进行统计分析，利用科学和工业研究委员会（CSIR）地质评价体系对岩体进行质量分级；系统研究了各种岩体抗拉强度、抗压强度、变形模量、粘聚力以及内摩擦角的确定方法，最终主要以Hoek—Brown准则为基础，结合其他方法，综合评判确定岩体力学参数，结果表明，大尺度垂悬岩体质量好，不同方法得到的力学参数值有所差别，综合评价能够较合理地得到适合于工程实践的岩体力学参数．

英文摘要：

Based on Shizhuyuan polymetallic ore,the mechanical parameters of the suspended rockmass in the ore were studied and determinated The survey of joints and fracture was carried out and the results were analyzed. Then the CSIR geological evaluation system was employed to make sure of the quality grade of the rockmass. The methodologies to calculate tensile strength,compressive strength,deformation modulus, cohesion and cohesive angles were researched systematically. Finally the mechanical parameters are determinated synthetically,mostly based on Hoek-Brown criterion but also combined with other methods. The results indicate that quality of the investigated suspended rockmass was well and the results obtained for mechanical parameters by different methods were not the same, and the mechanical parameters suitable for the engineering can be acquired in reason by synthetical evaluation.