Research Of Heat Transfer Mechanism On The Mining Rock Under The Seepage

As the coal and metallurgical mine are mining deeply, the threat of high temperature are increasingly serious. At the same time it brings all kinds of problems,such as deterioration in working conditions, the curing of supporting structure, coal combustion and underground rescue, which need to work out. Thus,accompanied by the deep mine exploitation and development, utilization of geothermal resource, the mechanism of heat transfer on deep rock has a strong practical significance. Currently, research of seepage and temperature fields in deep rock is one of the issues of the engineering field, which is one important factor about normal operation and security of project and is widely used in engineering fields.The paper is based on the permeability of fractured rock mass and heat transfer of theory. The model of a single fracture flow and basic coupling equation is setted up based on heat transfer and seepage theory. Transient temperature field is simulated by using finite element software. On this basic, the coupling model of heat-transfer is established. Temperature field distribution of fracture rock is described by using heat-transfer differential equation. At the same time, the heat-transfer equation is discretized by using weighted residual Galerkin finite element. Combined with boundary condition and parameters, the numerical solution is obtained, which lays a foundation for three-dimensional coupled seepage-temperature.Sceond, by analyzing the temperature distribution of deep rock , action mechanism of three dimensional seepage field, rock block field and flow temperature field in fractured rock mass, their coupling effect has been deduced. The model of heat transfer in deep rock is established under the action of seepage. At the same time, a preliminary solving approach is also discussed. Basing on default models in finite element software, I make some improvements in order to solve the coupling problem. Finally, the validity of the model is verified by the temperature of monitoring data on Paxi mine.