Yao Xulong, Liu Zhen, Zhang Yanbo, Tao Zhigang, Liang Peng, Zhao Jizhong
College of Mining Engineering, North China University of Science and Technology, Tangshan, 063210, China.
Hebei Provincial Laboratory of Mining Industry Development With Safe Technology Priority, Tangshan, 063210, China.
Sci Rep. 2024 May 7;14(1):10490. doi: 10.1038/s41598-024-60849-2.
The structure of rocks plays a crucial role in their failure process. However, it is ignored that the interactions between rock internal structure and the effect of its own evolution on the rock fracture process. To investigate the effect between the evolution law of rock regionalized structures and their interaction relationships during failure. We conducted an experiment using visual acoustic imaging monitoring to study rock failure, introducing a new concept of characteristics of rock structure-regionalized structures. The findings reveal three main types of regionalized structures in rocks: skeleton regions, variable regions, and damage regions. These structures combine to form four categories of complex rock structures: block-type support skeletons, point column-type support skeletons, suspension-type weak support skeletons, and no skeletons. During the failure process, we found that these regionalized structures worked together synergistically to control rock failure. Although the evolutionary relationships among the structures show some similarities, the final fracture states vary significantly. Stress and strain distribution patterns clearly demonstrate that variations in the force capacities and roles of the regionalized structures influence the synergistic evolutionary relationships, ultimately impacting the mode of rock failure. This work provides new insights for further research on rock failure mechanisms and can significantly contribute to preventing rock engineering disasters related to regionalized structures.
岩石的结构在其破坏过程中起着至关重要的作用。然而，岩石内部结构之间的相互作用及其自身演化对岩石断裂过程的影响却被忽视了。为了研究岩石区域化结构的演化规律及其在破坏过程中的相互作用关系。我们进行了一项使用视觉声学成像监测来研究岩石破坏的实验，引入了岩石结构——区域化结构特征的新概念。研究结果揭示了岩石中三种主要类型的区域化结构：骨架区域、可变区域和损伤区域。这些结构组合形成了四类复杂的岩石结构：块状支撑骨架、点柱式支撑骨架、悬浮式弱支撑骨架和无骨架结构。在破坏过程中，我们发现这些区域化结构协同作用来控制岩石破坏。尽管结构之间的演化关系显示出一些相似性，但最终的断裂状态却有显著差异。应力和应变分布模式清楚地表明，区域化结构的受力能力和作用的变化影响了协同演化关系，最终影响了岩石破坏的模式。这项工作为进一步研究岩石破坏机制提供了新的见解，并能显著有助于预防与区域化结构相关的岩石工程灾害。
