高温作用后砂岩力学性质实验研究  

Research on Mechanical Properties of Sandstone under High Temperature Effect

作　　者：梁永庆[1,2] 

机构地区：[1]杭州国电机械设计研究院有限公司,杭州310030 [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：《煤炭技术》2016年第3期76-78,共3页Coal Technology

摘　　要：研究了5种温度作用后砂岩的纵波速度以及力学特性。研究表明：高温作用后砂岩纵波速度逐渐减小,并且随着温度升高,纵波速度降低值增大;400℃～800℃随着温度升高而降低,脆性减小;砂岩三轴抗压强度随着围压升高而增大,且围压越大,增加幅值越大,弹性模量随着温度升高而减小。研究表明,高温作用使岩体的水分含量减少,孔隙体积增大,使岩体裂纹扩展,并且产生新的裂缝。The longitudinal wave velocity and mechanical characteristics of sandstone were studied under five temperature conditions. The studies shows that the longitudinal wave velocity decreases under the effect of high temperature. Under effect of 400℃~800℃, uniaxial tensile strength, uniaxial and triaxial compressive strength decreases as the temperature rises. Triaxial compressive strength of sandstone increase with confining pressure increasing,and elasticity modulus decreases with temperature increasing. The above researches show that the moisture content of rock mass decrea,ses under effect of high temperature, and the pore volume increased.

关 键 词：砂岩 高温 纵波速度 力学性质 

分 类 号：TD313[矿业工程—矿井建设]