Acoustic wave technology can not only nondestructively detect the micro-structure and evolution process of rock internal pores, but also clarify the macro-relationship of rock physical fields in the multi-field coupling action of thermal-hydrological-mechanical-chemical (THMC), and further clarify the rock performance under multi-field coupling action from the perspective of a combination of micro and macro scales. Based on the development of the test equipment, modern non-destructive detection methods, such as real-time computed tomography (CT) scanning technology, scanning electron microscopy (SEM), nuclear magnetic resonance imaging (NMRI), X-ray stereo imaging and ultrasonography, were developed. To study the mechanical properties of rocks under multi-field coupling, a multi-field coupling test system with different physical fields was designed by improvement through research and development. On the basis of summarizing the research and development of multi-field coupling micro-meso-macro multi-scale mechanical test equipment at home and abroad, and the developments of numerical simulation software and coupling calculation program, the development direction of rock mechanical test equipment and numerical analysis under multi field and multi-phase coupling are prospected.
To better analyze the interaction mechanism of rocks under of multi-field coupling, research is mainly carried out by experiment and numerical simulation. The study of multi-field coupling of rocks is currently a pressing and difficult problem at present.
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