Research On Physical Field Coupling Relations In Loading Process Of Rock

The tectonic activity and rock cataclysm induced by loading will cause many physical changes, such as the stress increase, rock distortion, acoustic emission (AE), electromagnetic radiation, infrared radiation (IR) change and so on. These physical variables have space-time evolutive rules and certain relation. How to monitor these physical variables in coordination, integration, complementary and validity is the key for early warning of solid Earth disaster (including geological disasters, earthquake disaster and mine disasters and so on).In this paper the evolutive pattern and relation of several physical fields, including stress field, strain field, IR temperature field and AE field of tortuously non-connected fault and the rock tunnel (or mine tunnel) project models, are studied by using of the physical simulation experiment and numerical simulation method. The main study results including:The stress field, strain field, IR temperature field and AE field of tortuously non-connected fault model present regular change in the loading process. The change patterns of different period and different spatial region is different. When the fault is close to cataclysm a characteristic pattern"three high-temperatures point"and"evolving alternately"appear in the fault and the rock bridge regions. There physical fields exist close relations between them.The hole-rock samples appear symmetrically tensive and compressing strain area along the round hole in the load process. The temperatures of the tensive-strain regions which are located up or under the hole are high and the temperatures of the compressing strain areas along the left or right of hole are low in elasticity period.The experimental result indicated that a good coupling relation between stress field, strain field, AE field and IR temperature field exists in the stress and the cataclysm process. It is hopeful to monitor fault activity and the rock project cataclysm successfully by the union of many kinds of physical methods and the coordination observation of physical fields.The paper research results is beneficial to the comprehension of many kinds of physical phenomena in the rock stress process as well as the early warning of tectonic activity and the rock project cataclysms.