砒砂岩的微结构定量化特征研究

应用光学显微照相和图像分析处理技术,对8份砒砂岩样进行了微结构定量化特征分析;运用多元线性回归对砒砂岩物理力学性质与其各微结构定量化参数进行了关联分析.研究表明,砒砂岩的抗压和抗拉强度与其颗粒的大小、形态、分布及排列及孔隙分布密切相关.一般而言,颗粒的粒径、平面分布分维和定向分维越小,砒砂岩的物理力学强度就越高,抗压和抗拉强度就越好.

Quantitative Characteristics of the Microstructure of Pisha-sandstone

Using optical micrography and image-analysis technique, the authors chose eight samples of Pisha-sandstone from a borehole to study the quantitative characteristics of their microstructure. With the multi-linear regression method, the correlation between physical mechanical properties and microstructural parameters was made to determine the effect of each microstructural element on the mechanical properties. The results show that the compressive and draught strength of Pisha-sandstone is closely related to the sizes, shapes, distribution and arrangements of is grains as well as the pore distribution. Generally speaking, the smaller the sizes and the distribution and orientation fractal dimension of the grains, the higher the mechanical properties of Pisha-sandstone.