鄂西恩施地区岩石物理力学参数的相关性

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σ_c、弹性模量E、泊松比µ、岩块的块体密度ρ和纵波速度V_p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。

The correlation study on physico-mechanical parameters of rock in western Hubei Province Enshi area

The rock physico-mechanical indices are important parameters reflecting the engineering properties. The uniaxial compressive strength σ_c, elastic modulus E, Poisson's ratio μ, rock block density ρ and longitu dinal wave velocity V_pof Cretaceous sandstone, Triassic siltstone, Triassic thin marl, Triassic silty mudstone, Devonian quartz sandstone and Triassic, Permian, Ordovician limestone in typical landslide area of Enshi county western Hubei province were chosen as objects of analysis. Through the cluster and correlation analysis of the above representative test parameters, the results indicate that Cretaceous sandstone and Triassic siltstone, Triassic silty mudstone and Permian limestone have the same associated model of parameters. The rock density is connected with P-wave velocity tightly, so their product can be used as a combination parameter to improve the parameters correlation equations fitting precision. Every strata rock parameters correlation equation is obtained respectively. The equations can consider more factors and have a concise form. The normality testing results of fit residuals show that the fitted parameters correlation equations are reasonable.