| In this thesis, ground temperature distribution characteristics and the geothermal field control factors of Suxian mine, as research object, are analyzed. And this is based on temperature of approximate steady-state hole, the temperature of simple temperature hole that has been corrected by the temperature of approximate steady-state hole, and Underground tunnel temperature measurement. Use COMSOL software to simulate and invert geothermal field of mine, analyse heat inj ury case of mine, evaluate geothermal resources in mine. The main conclusions and understanding were as follows:The geothermal gradient in western and eastern of mine is small, even less than1.6℃ever one hundred meters in local area of mine, and negative anomalies appear. The geothermal gradient in central of Mine is higher relatively, above1.6℃ever one hundred meters in most areas, more than3℃ever one hundred meters in local area, and positive anomaly appear. There will appear a phenomenon of heat injury on-642m depth, and two thermal damage phenomena approximately on-904m depth.It is basically consistent between horizontal ground temperature characteristics and the geothermal gradient. On the same level, the lower temperature is in southwest relatively; the northeast and southeast have relatively higher temperature; there is relatively stable middle ground temperature in mine. In the vertical direction, the ground temperature increases with increasing depth.Foundation construction, the thickness of loose layer and the activities of groundwater have greater impacts on the geothermal field of the mine, and play a control role.Use COMSOL software to simulate and invert geothermal field of mine, and faults have some barrier effect, the average of bottom heat flux value Qb is0.05W/m2. The model has certain reference value to guide the work of the deeper coalbeds mined.The geothermal resources,-1500m the above range in mine, got by thermal energy storage method, is about1.08542*1020J. |
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