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通过不同配比下相似材料试件的水理性质正交试验,分析了以水泥和石膏作为胶结剂,石英砂作为骨料的相似材料吸水率、软化系数和渗透系数随砂胶比(骨料与胶结材料质量比)、水膏比(水泥占胶结材料百分比)、石英砂粒径的变化规律。通过对比分析,证明此种相似材料在一定配比情况下遇水不会发生崩解,而是产生类似岩石的软化现象,适用于原型岩体为孔隙较发育的石灰岩和砂岩,并且不以吸水特性为研究对象的相似材料固-流耦合模型试验研究。通过对样本数据进行多元回归分析,得到了吸水率、软化系数和渗透系数与砂胶比、水膏比和石英砂粒径之间的经验方程。通过神华新街台格庙矿区白垩系志丹群巨厚层砂岩含水层固-流耦合相似材料模型试验,证明水泥石膏胶结相似材料可以应用于固-流耦合试验中,并且经验方程可用于对相似材料的水理性质进行验算。
Through orthogonal experiment of hydration properties of similar materials under different ratio, the water absorption, softening coefficient and permeability coefficient of similar materials with cement and gypsum as binder and quartz sand as aggregate were analyzed. And the mass ratio of cementitious material), water-paste ratio (cement percentage of cementitious material), quartz sand particle size changes. Through comparative analysis, it is proved that similar materials can not disintegrate with water in a certain ratio, but produce softening phenomenon similar to rock, which is suitable for the prototype rock body to have limestone and sandstone with relatively developed porosity and not to absorb water Characteristics of the study of similar materials solid-fluid coupling model test. Through the multiple regression analysis of the sample data, empirical equations between water absorption, softening coefficient and permeability coefficient and the ratio of sand to binder, water to paste ratio and quartz sand particle size were obtained. Through similar model tests of the solid-fluid coupling of the thick-bedded sandstone aquifer in the Cretaceous Cretaceous Zhidan Group in the Shenhua New Street, it is proved that cementitious cementitious similar materials can be used in the solid-fluid coupling experiment, and the empirical equation can be used for Water quality of similar materials for checking.