【摘要】 应用钻孔勘探、岩土薄片显微镜分析、粒径分析、土的物理性质测定等方法,开展了基岩风化带分层、风化带物质来源分析、风化带土的工程分类、土渗透变形类型判别等性能研究。研究结果表明,研究区发育的震旦系大洪峪组石英砂岩与前震旦系片麻岩地层全风化形成石英砂岩风化残积土层与片麻岩全风化土层,一般均为粉质砂土,富含粉粘粒,孔隙发育不均匀,具低渗透性,为管涌土。采动影响下,风化土层可能产生渗透变形,导致隔水层渗透性增强,从而使矿山充水强度增强或导致露天矿边坡破坏失稳。更多还原

【Abstract】 The physical properties of soil,such as bedrock weathering zone layering,material source analysis of weathering zone,engineering classification of weathering zone soil and discrimination of soil seepage deformation types,etc.were studied by methods of drilling exploration,microscopic analysis of rock and soil slices and particle size analysis.on The result shows that the development of sinian system in the study area valley group of quartz sandstone and sinian system before the deluge gneiss formation all weathered eluvial soil composed of quartz sandstone and gneiss weathered soil,generally slitysoil,rich in clay powder,uneven development,low permeability,for piping soil.Under the influence of mining,the weathering soil layer may produce osmotic deformation,which leads to the permeability enhancement of the aquifer,so as to increase the mine filling strength or cause the slope failure and instability of the open pit.更多还原