深部灰岩单轴蠕变特性试验研究

采用MTS815液压伺服岩石试验系统和DISP-2声发射监测系统，对重庆市某煤矿深部灰岩进行了单轴蠕变压缩实验，对单轴蠕变实验过程中伴随的声发射特征进行了研究，认为岩石的声发射特征能很好的表征岩石整个蠕变变形过程，包括岩石微观结构如晶格缺陷的扩散、孔隙裂隙的张合、粒间协调变形及微观破裂的产生、扩散贯通等岩石蠕变特征。同时对实验曲线进行了不同的模型参数的反演，认为用对数函数型及指数函数型模型均能很好的表征该类灰岩蠕变变形性能，且二类模型中对数模型为最佳模型。

Uniaxial Experimental Analysis on Creep Properties of Deep Limestone

The uniaxial creep tests were carried out for deep limestone from Chongqing adoptal by the MTS815 servo-controlled rock mechanical test system. Meanwhile, the DISP-2 based AE system was used to test acoustic emission （AE） signal. It is found that AE can better reflect rock microstructure such as diffusion of lattice defects, opening and close of the pore and fracture, compatible deformation among particles, the generation and connection of micro ruptures. Through different creep model parameter inversion, it is concluded that either the logarithmic function creep model or the exponential function can better reflect deep rock creep deformation behavior and the logarithmic function creep model is much better.