渗流水压力分级加载岩石蠕变模型  

Study on the Creep Model of Rocks under Step Loading of Seepage Pressure

作　　者：杨红伟[1,2] 许江[2] 聂闻[2] 彭守建[2] 

机构地区：[1]宜宾学院矿业工程研究所,四川宜宾644007 [2]重庆大学煤矿灾害动力学与控制国家重点实验室,重庆400044

出　　处：《宜宾学院学报》2015年第6期1-5,共5页Journal of Yibin University

基　　金：国家自然科学基金项目(51474040);国家青年科学基金项目(51304255);宜宾市科学技术局重点科研项目(2014SF032);宜宾学院博士科研启动金项目(2012B18)

摘　　要：采用RLW-2000M微机控制煤岩流变仪,以细粒砂岩为研究对象,对三轴压缩条件下岩石孔隙水压力分级加载蠕变试验进行了蠕变特性及模型研究.重点分析了孔隙水压力分级加载时蠕变条件下岩石的应变、渗流体积演化曲线,同时对不同渗流水压力分级加载条件下的岩石蠕变演化曲线进行了模型分析和对比.试验结果表明,逐级加载孔隙水压作用下细粒砂岩的蠕变曲线符合蠕变演化三阶段特征;利用西原体模型进行理论与实验蠕变曲线对比,蠕变方程曲线与实验曲线的演化规律吻合.Creep and damage of fine sandstone rock under step loading of pore water pressure were carried out by triaxialcompression creep tests using RLW-2000 M Coal and Rock Computer Controlled Rheological Testing Machine. The high-lights include researches of volumetric strain and seepage volume evolution curves of rock creep under different step load-ing of pore water pressure. In addition, evolutions of rock creep curves were analyzed. The results show that creep curveshave agreement with three stages in typical creep process. The theoretical analysis of creep curves by Nishihara modelwas validated by experiments.

关 键 词：岩石力学 砂岩 蠕变 分级加载 渗流压力 

分 类 号：TD458[矿业工程—矿山机电]