冻融循环作用下西藏玉龙铜矿边坡岩体物理力学特性研究  

Study on the Physical and Mechanical Characteristics of rocks in the Slop of Tibet Yulong Copper Mine under the Effect of Freezing-thawing Cycles

作　　者：牛小明[1,2] 唐绍辉[1,2] 苏伟[1,2] 唐海燕[1,2] 

机构地区：[1]长沙矿山研究院有限责任公司安全技术中心,湖南长沙410012 [2]金属矿山安全技术国家重点实验室,湖南长沙410012

出　　处：《矿业研究与开发》2012年第5期53-56,121,共5页Mining Research and Development

基　　金：国家重点基础研究发展计划(973计划)(2012CB724207)

摘　　要：对取自西藏玉龙铜矿的花岗岩和石英砂岩进行了冻融循环试验,得到两种岩样在冻融循环过程中的体积、质量和抗拉强度的变化规律,试验结果表明:两种岩样的体积都是先收缩后膨胀;质量均有极小增加;抗拉强度都有所降低,但上述3种物理力学特性的变化方式则各不相同。通过分析,得出导致这种变化的主要因素是:岩石矿物颗粒和孔隙水在冻融循环过程中发生了相互作用。试验结果为现场边坡设计提供了重要依据,也对岩石冻融力学研究有重大意义。Experiment of freezing-thawing cycles on the granite and quartz-sandstone specimens from Tibet Yulong copper mine was carried out,by the test,the changes rule of volume,quality and tensile strength of the two kinds of rocks were found.In the process of experiment,the two kinds of rocks specimens all first shrunk and then expanded in volume,all slightly increased in quality,and some decreased in tensile strength,but the changing patterns of the three physico-mechanical characteristics were different,and through analyzing the factors that lead to these changes,it was found that the interaction of pore water and mineral particles in freezing-thawing cycles were the main reason.The results of the experiment can provide important basis for the slope design,at the same time it has great significance for the mechanics research of rocks under freezing-thawing cycles.

关 键 词：冻融循环 花岗岩 石英砂岩 露天边坡 抗拉强度 

分 类 号：TD854.6[矿业工程—金属矿开采]