Abstract

AbstractOn the basis of the results of the thermal conductivity of 127 rock samples in the tested coal measure strata and combining 59 reliable system temperature measurement data in mine field, we calculated out the heat flow values in Huainan‐Huaibei coalfield and drew the distribution map of terrestrial heat flow. The results show that the heat flow values in Huainan‐Huaibei coalfield range from 29.7 to 83.9 mW·m−2 and the average is 58.3 mW·m−2. There is a certain difference compared to other energy basins and the heat flow value in Huainan coalfield which is 63.7 mW·m−2 is much higher than that in Huaibei coalfield which is 55.2 mW·m−2. Through comprehensive analysis, we come to the conclusion that the difference between the terrestrial heat flow in study area and the one in other basins, and the phenomenon that the heat flow value in Huainan coalfield is higher than the one in Huaibei coalfield are controlled by tectonic evolution and regional geological background. And the reasons of heat flow maldistribution in study area is mainly influence of the geological structure on the geothermal field. Especially, the influence of nappe tectonic on the difference of current heat flow values on upper and lower side is very obvious.

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