引江补汉工程部分岩石磨耗性与等效石英含量关系

Relationship between abrasiveness and equivalent quartz percentage of some rocksfrom Water Diversions Project from Three Gorges Reservoir to Hanjiang River

为研究引江补汉工程岩石磨耗性与岩石矿物组成之间的关系,通过收集整理工程地质勘察过程中获得的部分岩石磨耗性指数(CAI)及其相应矿物成分测试数据,进行岩石等效石英含量Qe及其与岩石磨耗性CAI值的相关性分析计算。结果表明:在收集的数据中,侵入岩和片麻岩岩石磨耗性和等效石英含量相对较高,对TBM刀具磨损影响较大,碳酸盐岩相对较低;侵入岩和片麻岩的岩石磨耗性CAI值具有随等效石英含量Qe的增加而增大的趋势,两者之间具有相关关系,碳酸盐岩岩石CAI值与Qe无统计上的相关关系;部分碳酸盐等效石英含量较低,但具有较高的磨耗性,据此可推测岩石矿物成分不是控制其磨耗性的主要因素。

In order to study the relationship between rock abrasiveness and rock mineral composition in the Water Diversions Project from Three Gorges Reservoir to Hanjiang River,part of the data of rock abrasiveness value(CAI)and corresponding mineral composition test obtained in the process of engineering geological investigation were collected,and the equivalent quartz percentage Q e and its correlation with rock abrasiveness value CAI were calculated.The results showed that in this data collected,the abrasion and equivalent quartz percentage of intrusive rock and gneiss rock were relatively high,which had a great influence on TBM tool wear,and carbonate rock was relatively low.The abrasion CAI value of intrusive rocks and gneiss rocks increased with the increase of equivalent quartz percentage Q e,and there was a correlation between them.There was no statistical correlation between the CAI value of carbonate rocks and Q e.The equivalent quartz percentage of some carbonates was low,which still had high abrasiveness property.The research results indicate that the rock mineral composition is not the main factor controlling the abrasiveness property for these carbonates.