Drilling temperature distribution in Xinzheng mining area and its controlling mechanism

The ground temperature is one of the main important geologic factors affecting the coal mining.It is shown that Borehole No.911 lies in the Hutuo anticlinal axis,the main structure of Xinzheng mining area and has the distribution characteristics of high heat flow and high geothermal gradient through measurement in steady state and theory analysis.The temperature of the borehole mainly affected by double controlling factors including the tectonic fluctuation and the groundwater vertical convection.The heat flow coming from deep crust is reappor-tioned by the fluctuation of the mining area and made concentrating to anticlinal axis and the temperature charac-teristics of high heat flow and high geothermal gradient of Borehole No.911 is resulted in.More different distribu-tion to the drill temperature is impelled by the vertical convection movement of groundwater,and the distribution and controlling mechanisms of the ground temperature field are revealed.