采矿与岩层控制工程学报2024，Vol.6Issue(1)：137-148,12.
富水环境下强-中风化硅质板岩吸水特性及微观演化规律
Water absorption behavior and its micro-evolution law of strongly-moderately weathered siliceous slate under water-rich environment
摘要
Abstract
To study the water absorption characteristics and microscopic evolution law of strongly and moderately weathered siliceous slate under water-rich environment,the immersion test,scanning electron microscope test and X-ray diffraction test were conduced on the strongly and moderately weathered siliceous slate in Jiuzhai Tunnel of Yuxi-Chuxiong National Expressway.The results show that the water absorption process of strongly and moder-ately weathered siliceous slate under water-rich environment can be divided into three stages:rapid water absorp-tion(0-2 hours),slow water absorption(2-24 hours)and dynamic equilibrium water absorption(more than 24 hours).In the stage of rapid water absorption,the rock structure becomes loose,and pores and microcracks gradu-ally extend and develop.During the slow water absorption stage,the cement dissolves and falls off,and rock fur-ther loosens,producing further pores and cracksand forming obvious penetrating cracks gradually.In the stage of dynamic equilibrium water absorption,the looseness of rock structure and the development of pores and fratures basically reach a stable state.The main mineral components of strongly and moderately weathered siliceous slate are quartz and clay minerals.In water immersion test,the relative content of quartz increases,but clay minerals decrease.Clay minerals,such as illite and illite-montmorillonite mixed layer,are extremely unstable when ex-posed to water.They can not only react chemically with water and transform into quartz and other clay minerals,but also react physically with water,showing the characteristics of swelling,crushing and decomposition.The research results can provide reference for the theoretical research of water absorption and softening of strongly-moderately weathered siliceous slate.关键词
富水环境/强-中风化硅质板岩/吸水特性/微观演化规律Key words
water-rich environment/strongly-moderately weathered siliceous slate/water absorption behavior/microscopic evolution law分类
矿业与冶金引用本文复制引用
杨志全,李飞洋,甘进,赵鹏飞,付梦,闫煜,谭皓,张建,朱颖彦..富水环境下强-中风化硅质板岩吸水特性及微观演化规律[J].采矿与岩层控制工程学报,2024,6(1):137-148,12.基金项目
云南省阿瑟夫·汉院士工作站资助项目(202105AF150076) （202105AF150076）
云南省重点研发计划资助项目(202003AC10002) （202003AC10002）
云南省基础研究计划面上资助项目(202001AT070043) （202001AT070043）
