岩体力学强度参数是影响岩体质量指标的重要因素,而岩体质量级别直接反映岩体稳定性情况,为了研究西露天矿边坡岩体自稳能力,采用现场结构面摄影测量技术获取岩体结构面参数信息,利用点荷载试验和广义Hoek-Brown强度准则研究了边坡岩石和岩体的力学强度参数,并结合岩体质量分级理论,研究了边坡不同区域的岩体质量级别.研究表明:西露天矿边坡岩石抗压强度为88.93～119.86 MPa,强度较高;岩体整体抗压强度为2.874 ～3.710MPa,黏聚力为0.788～0.894MPa,内摩擦角为49.18°～51.01°,岩体质量较好,属于Ⅲ级岩体,基本稳定;但局部3号测点区域岩体抗压强度较低,仅有0.555 MPa,黏聚力0.438 MPa,内摩擦角39.46°,属于Ⅳ级岩体,岩体自稳能力差.%Based on the rock mechanics strength parameters were the important factors affected to the rock quality index,the rock quality grading could directly reflect the stability of the rock condition,in order to study the self-stability ability of the slope rock in the West Open Pit Mine,a site structural surface photogrammetry technology was applied to get the information on the parameters of the rock structural surface and the point load test and the generalized Hoek-Brown strength criterion were applied to study the mechanics strength parameters of the slope rock and rock mass.In combination with the quality grading theory of the rock mass,the rock mass quality grading of the slope in different region was studied.The study showed that the compressive strength of the slope rock in West Open Pit Mine was 88.93 ～ 119.86 MPa and the strength was high.The compressive strength of the whole rock was 2.874 ～ 3.710 MPa,the cohesion force was 0.788 ～ 0.894 MPa,the internal friction angle was 49.18°～ 51.01°,the quality of the rock mass was good,the rock mass was a Grade Ⅲ rock mass and the stability was stable.The compressive strength of the rock mass in No.3 measuring point region was low locally,was only 0.555 MPa,the cohesion force was 0.438 MPa,the internal friction angle was 39.46°,was a Grade Ⅳ rock mass and the self stability capacity of the rock mass was poor.
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