低应力条件下水对斜长岩蠕变性能的影响  

Effects of water on creep mechanical properties of plagioclase

作　　者：李江腾[1] 郭群[1] 曹平[1] 林杭[1] 张向阳[1] 赵延林[2] 

机构地区：[1]中南大学资源与安全工程学院,湖南长沙410083 [2]湖南科技大学煤矿安全开采技术湖南省重点实验室,湖南湘潭411201

出　　处：《中南大学学报（自然科学版）》2011年第9期2797-2801,共5页Journal of Central South University:Science and Technology

基　　金：湖南省水利厅科技项目(2010);国家自然科学基金资助项目(50774093);湖南省自然科学基金资助项目(10JJ3007)

摘　　要：利用RYL-600微机控制岩石剪切流变仪,采用分级增量循环加、卸载方式,对金川有色金属公司Ⅱ矿区斜长岩在风干和饱和水2种条件下进行单轴压缩蠕变试验,获得相应的蠕变试验曲线。以试验结果为依据,探讨饱和水对斜长岩蠕变特性的影响。试验结果表明:在同一应力下,饱和水试件的蠕变曲线及蠕变速率曲线均位于干燥试样相应曲线的上方,即在相同载荷作用下,饱和水试件产生相应的变形要大,说明水能加速变形,且饱和状态的比干燥状态蠕变速率达到稳定阶段所经历的时间较长,这与实际结果相一致。A set of uniaxial compression creep experiments of plagioclase specimens were performed in dry and water-saturated states in Jinchuan Mine Ⅱ by a circular increment step load and unload method using RYL-600 Shear Rheometer.Creep experiment curves were obtained.The effects of water-saturated on creep mechanical properties of plagioclase was studied according to the experimental data.The results show that the creep curves and creep strain rate curves of water-saturated specimens are above corresponding curves of dry specimens at the same stress level,i.e.the deformation of water-saturated specimen is bigger than that of dry specimen.It takes longer time for the creep strain rate of water-saturated specimen to reach steady phase than for the dry specimen.The results correspond to those of practical cases.

关 键 词：斜长岩 低应力 蠕变参数 饱和水 

分 类 号：O342.1[理学—固体力学]