淮南刘庄煤矿地基人工冻融土工程性质与中微观结构之间关系研究

STUDY ON THE RELATION BETWEEN ENGINEERING PROPERTIES AND MEDIUM-MICRO TEXTURES OF ARTIFICIAL FROST-THAWED SOIL FOUNDATION IN THE LIUZHUANG COALMINE,HUAINAN

以淮南刘庄煤矿主井地基的人工冻融土为研究对象,以偏光显微镜,扫描电镜(SEM)为主要研究手段,研究分析了人工冻融土与原状土的中微观结构、冻融前后的中微观结构的变化规律及内在原因。此外,还研究分析了人工冻融土冻融前后的中微观结构及其变化与人工冻融土的物理、力学、工程性质之间的关系。研究显示中微观结构对人工冻融土的物理、力学、工程性质有很大的影响,冻融前后中微观结构的变化受到土的种类、埋深、原状土的中微观结构等因素的影响,且冻融前后的中微观结构的变化在一定程度上主导了冻融前后的物理、力学、工程性质的改变。

With artificial frost-thawed soil foundation of the Liuzhuang coalmine, Huainan as subject, polarized microscope and SEM as main means of research, this paper analyzed medium-micro textures of artificial frost-thawed soil and undisturbed soil, changing law of medium-micro textures of the soil before and after frost-thawing and the inherent origin, including the relations between medium-micro textures before and after frost-thawing with the physical, mechanical and engineering properties of artificial frost-thawed soil. The result showed that medium-micro textures have great effect on the physical, mechanical and engineering properties of artificial frost-thawed soil, the changes of medium-micro textures before and after frost-thawing depend on the types, burial depth and medium-micro textures of undisturbed soil in some way, and such changes in medium-micro textures are a leading factor to the changes in physical, mechanical and engineering properties.