奥陶系顶部风化带土石混合体渗透性研究

doi:10.11799/ce201610029

Abstract

Abstract: This paper studied the permeability of limestone on top strata of Ordovician due to the viewpoint that carbonate aquifuge is existed in the top of Ordovician in North China. Based on the investigation of the composition and structure of strata, we analyzed the relation between two key factors (clay content and porosity) with permeability coefficient of earth-rock aggregate. Laboratory test for permeability had been utilized in this study to measure the permeability coefficient with different combinations of clay content and porosity, determining the influence that exerted from both factors on permeability coefficient. According to the regressive analysis of experimental data, it is able to obtain the empirical relationship between both factors with the permeability coefficient of earth-rock aggregate. A formula for calculation of the permeability coefficient had been proposed and provide theoretical basis for actual engineering application.

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Research for the Permeability of the Earth-rock Aggregate: a Case Study in the Weathering Zone on Top Ordovician

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