抚顺西露天矿边坡岩体强度计算及质量分级研究

发布时间：2018-03-17 03:26

  本文选题：边坡稳定性　切入点：结构面摄影测量　出处：《煤炭科学技术》2017年12期 　论文类型：期刊论文

【摘要】：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2.874~3.710 MPa,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。
[Abstract]:The mechanical strength parameter of rock mass is an important factor affecting the quality index of rock mass, and the quality level of rock mass directly reflects the stability of rock mass. In order to study the self-stability ability of rock mass in west opencast mine slope, The field structural plane photogrammetry was used to obtain the parameter information of rock mass structural plane. The mechanical strength parameters of slope rock and rock mass were studied by point load test and generalized Hoek-Brown strength criterion, and combined with the theory of rock mass quality classification. The quality grade of rock mass in different regions of the slope is studied. The results show that the compressive strength of the slope is 88.93X 119.86 MPa, the overall compressive strength of rock mass is 2.874 ~ 3.710 MPa, the cohesion is 0.7880.894MPa, the angle of internal friction is 49.18 掳51.01 掳, and the quality of rock mass is good. It belongs to grade 鈪，

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