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高程对强风化灰岩抗剪强度具有非常重要的影响。以北衙金矿露天采场边坡的强风化灰岩为研究对象,在对现场原位直剪试验计算得到的抗剪强度结果进行正态性检验的基础上,采用敏感性分析方法,探讨了高程对强风化灰岩抗剪强度影响的敏感性程度。研究结果表明:高程H对强风化灰岩抗剪强度参数粘聚力c的敏感性程度远强于其对内摩擦角φ的敏感性程度,即,高程H对粘聚力c的影响程度远大于其对内摩擦角φ的影响程度。因此,在对不同高程强风化灰岩粘聚力的取值时要比内摩擦角的取值更为谨慎、精确。研究成果可为北衙金矿露天采场边坡及其它地质条件类似的矿山或工程在不同高程强风化灰岩抗剪强度参数的取值提供一定的技术参考依据。
Elevation has a very important influence on the shear strength of strongly weathered limestone. Taking the weathered limestone in the side slope of the open pit of Beiya gold mine as the research object, based on the normality test of the shear strength results calculated by the in-situ direct shear test, the sensitivity analysis method is used The sensitivity of elevations to the shear strength of strongly weathered limestone. The results show that the sensitivity of elevations H to shear cohesion c of strongly weathered limestone is much stronger than that of cohesion c, that is, the influence of elevation H on cohesion c is much greater The degree of influence on the internal friction angle φ. Therefore, the value of the cohesion of strong limestone with different elevation is more cautious and accurate than the value of internal friction angle. The research results can provide certain technical reference for the value of the shear strength parameters of Beiya gold mine open pit slope and other geological conditions similar to the mine or project with different elevation and strong weathered limestone.