The object of this article is to investigate the energy evolution mechanism and failure criteria of cross-jointed samples containing an opening during deformation and failure based on the uniaxial compression test and rock energy principle. The results show that the energy evolution characteristics of the samples correspond to a typical progressive damage mode. The peak total energy, peak elastic energy, and total input energy of the samples all first decrease and then increase with an increase of half of the included angle, reaching their minimum values when this angle is 45°, while the dissipated energy generally increases with this angle. The existence of the opening and cross joints can obviously weaken the energy storage capacity of the rock, and the change in the included angle of the cross joint has a great influence on the elastic energy ratio of the sample before the peak stress, which leads to some differences in the distribution laws of the input energy. The continuous change and the subsequent sharp change in the rate of change in the energy consumption ratio can be used as the criteria of the crack initiation and propagation and the unstable failure of the sample, respectively.

本文的目的是基于单轴压缩试验和岩石能量原理，研究包含开口的交叉连接样品在变形和破坏过程中的能量演化机制和破坏准则。结果表明，样品的能量演化特征对应于典型的渐进损伤模式。样品的峰值总能量、峰值弹性能和总输入能量都随着夹角的增加而先减小后增加，当夹角为45°时达到最小值，而耗散能量一般随着夹角的增加而增加。这个角度。开口节理和十字节理的存在会明显削弱岩石的储能能力，而十字接头夹角的变化对峰值应力前试样的弹性能比影响很大，导致输入能量的分布规律存在一定差异。能量消耗比变化率的连续变化和随后的急剧变化可以分别作为裂纹萌生和扩展以及样品不稳定破坏的标准。