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岩石物理力学性质指标是反映岩体工程特性的重要参数。通过对鄂西恩施地区典型滑坡区白垩系砂岩、三叠系粉砂岩、三叠系薄层泥灰岩、三叠系粉砂质泥岩、泥盆系石英砂岩和三叠系、二叠系、奥陶系灰岩等岩石单轴抗压强度σc、弹性模量E、泊松比μ、岩块的块体密度ρ和纵波速度Vp等试验数据的聚类和相关分析,表明白垩系砂岩和三叠系粉砂岩、三叠系粉砂质泥岩和二叠系灰岩参数间关联模式完全一致,其中岩块密度和纵波速度的关系最密切,将两者的乘积作为组合参数进行参数关联式拟合可提高拟合精度。分别对各地层岩石拟合出考虑多种因素且形式简明的参数关联式,并对拟合残差进行正态性检验,结果表明拟合出的参数关联式比较合理。
Rock physical and mechanical properties of the index is an important parameter to reflect the engineering characteristics of rock mass. Through the analysis of the Cretaceous sandstone, Triassic siltstone, Triassic thin-bed marl, Triassic silty mudstone, Devonian quartz sandstone and Triassic, Permian, Ordovician limestone and other rock uniaxial compressive strength σc, elastic modulus E, Poisson’s ratio μ, rock block density ρ and Pw velocity and other experimental data clustering and correlation analysis showed that the Cretaceous sandstone and The correlation model between Triassic siltstone, Triassic silty mudstone and Permian limestone is completely consistent. The relationship between rock mass density and longitudinal wave velocity is the closest, and the product of the two is used as the parameter of correlation Fitting can improve the fitting accuracy. The parameter correlations with various factors and concise forms were fitted to the strata rocks respectively. The normality test of the fitted residuals was carried out. The results show that the fitted parameters are reasonable.