【摘要】 岩石材料受力变形破坏与能量的演化密切相关。采用GCTS RTX-4000高温高压动态岩石三轴仪对大理岩进行了单轴、三轴压缩试验，研究了围压效应对大理岩力学变形、破坏模式及能量演化规律。结果表明，围压增大导致大理岩在变形方面表现出“脆-延-塑”转化特征；在破坏形式方面由轴向劈裂破坏逐渐向斜剪拉裂破坏发展；在能量演化方面表现出总能量、弹性能和耗散能与围压具有正增长关系；在损伤方面，基于耗散能计算损伤变量，发现随围压的增加，大理岩损伤变量数值逐渐增大，二者表现出正相关关系，并且损伤变量与轴向应变呈四次多项式增长规律。更多还原

【Abstract】 The deformation and failure of rock under pressure is closely related to the evolution of energy. This study conducted the uniaxial and triaxial compression tests of marble by using GCTS RTX-4000 high-temperature, high-pressure dynamic rock triaxial apparatus, and studied the mechanical deformation, failure mode and energy evolution law of marble under the confining pressure effect. The results show that the marble deformation has "bri-ttle-ductile-plastic" transformation characteristics as the increase of confining pressure; the failure features a gradual development from axial splitting failure to oblique shear tensile failure; energy evolution features a positive growth relationship between the total energy, elastic energy and dissipation energy and the confining pressure; as for the damage, it is found that, based on the calculated damage variable, the value of marble damage variable gradually increases with the confining pressure, there is a positive correlation between the two variables; and the damage va-riable and the axial stress have a law of standard quartic polynomial increase.更多还原