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中文摘要：
采用RMT-150C岩石力学试验系统开展不同温度作用（20、200和800℃）下大理岩的单轴、三轴试验及温度循环作用后大理岩的单轴压缩试验，系统地分析了大理岩在不同温度以及温度循环作用下的物理力学特性。试验结果表明：随着温度的升高，大理岩的变形特性表现为塑性变形明显、弹性模量降低、峰值应变增大。和常温下试件相比，加热到200℃后，试件的黏聚力提高，内摩擦角降低；加热到800℃后，试件的黏聚力降低，内摩擦角基本相同。在200℃循环作用下，随着作用次数的增加，大理岩试件的峰值强度、弹性模量均呈现出降低的趋势。随着温度的升高，大理岩的纵波波速发生不同程度的降低；与单次加温相比，随着循环加温次数增多，纵波波速降低，但是降低幅度很小。常温以及200℃温度作用下，试件的破坏基本为宏观单一断面的剪切破坏；800℃高温作用下，部分试件产生了很多条破裂面；温度循环作用对岩石试件破裂形式没有显著影响。
英文摘要：
The uniaxial and triaxial test under the action of different temperature （20,200 and 800 ℃ ） and the uni- axial test under temperature cycling are carried out by rock mechanics testing system RMT - 150℃. The mechanical proper- ties of marble under the influence of different temperature and temperature cycling are analyzed systematically. The results showed that as the temperature increases, the marble characterizes as significantly plastic deformation, elastic modulus re- ducing and peak strain increasing. Compared with the samples at room temperature, the cohesion of the samples increases and its internal friction angle decreases after suffering 200 ℃ ; while the cohesion of the sample suffered 800 ℃ decreases and its internal friction angle is the same as the samples at room temperature. The peak strength and elastic modulus of the sample decrease under increasing cycle heating times （ 200 ℃ ）. As the temperature increases,longitudinal wave velocity decreases in different degrees. Compared with single heating, longitudinal wave speed decreases while the number of circu- lating heated adding,but the reduction is small. Both failure modes of samples at room temperature and those of samples suffered 200 ℃ show single macroscopic cross-section shear failure ; Part of the sample suffered 800℃ have many rupture surface; The temperature cycles does not have significant effect on the rupture form of the rock sample.
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