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高温岩体地热开发过程中存在渗流场、应力场、温度场3场耦合效应。针对目前考虑损伤作用和热对流影响的3场耦合模型、关于热储层特别是人工储留层周围高温岩体的热破裂、温度场的变化和热对流交换规律的研究以及原位试验方面的资料较少的现实,建立了高温岩体热流固耦合损伤模型,并将上述模型用于高温岩体地热开发中。通过数值模拟,揭示高温岩体地热开发过程中高温岩体的热破裂机理、温度场、渗流场的变化规律以及人工储留层中热流体的对流规律,所得研究成果对高温岩体地热开发具有理论意义和实用价值。
There are three coupling effects of seepage field, stress field and temperature field in geothermal development of high temperature rock mass. Aiming at the three coupling models considering the effects of damage and heat convection, the research on the thermal rupture, the change of temperature field and the convection of heat convection in the hot reservoirs, especially the high temperature rock mass around the artificial reservoirs, With less data, the thermal-fluid-rock coupling damage model for high-temperature rock mass was established and the model was applied to the geothermal development of high-temperature rock mass. By means of numerical simulation, the thermal rupture mechanism, the variation law of temperature field and seepage field and the convection law of thermal fluid in artificial reservoirs are revealed in geothermal development of high-temperature rock mass. The research results have the following significances: Theoretical significance and practical value.