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.
出处
《煤炭技术》
CAS
北大核心
2016年第3期76-78,共3页
Coal Technology
关键词
砂岩
高温
纵波速度
力学性质
sandstone
high temperature
longitudinal wave velocity
mechanical characteristics
