高温岩石细观裂纹演化机制研究进展

he microcrack evolution mechanism of high-temperature rock has received widespread study.Howeverthe systematic summary is still lacking.The research progress of the microcrack evolution mechanism of high-temperature rock is systematically summarized from four perspectivesincluding slow heating and cooling effectthermal shock effectstress effectand the combined effects of high-temperature and stress.The evolution of microcracks in high-temperature rock is described in detail.The application of advanced experimental techniques into the study of microcrack evolution mechanism was introducedincluding acoustic emission (AE)ultrasound wavemercury intrusion technologynuclear magnetic resonance (NMR) technologyoptical microscopescanning electron microscope (SEM) and computer tomography (CT) scanning technology.The limitations of existing research are pointed outincluding the lack of research on microstructural changes under the coupling effects of multiple physical fields and multiphase mediaand the lack of research on establishing quantitative relationships between microstructural parameters and macroscopic physical and mechanical parameters.The research trend of microcracking properties in high-temperature rocks is described from two aspectsincluding the multi technology joint monitoring and the establishment of macro-micro quantitative relationships.