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Coal Engineering ›› 2026, Vol. 58 ›› Issue (4): 195-203.doi: 10.11799/ce202604023

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Occurrence characteristics and genetic mode of deep geothermal resources

in Shicaocun Coal Mine

  

  • Received:2025-04-17 Revised:2025-05-29 Online:2026-04-10 Published:2026-05-12
  • Contact: GUO JiaHao E-mail:458572087@qq.com

Abstract:

Abstract:In order to study the deep geothermal geological conditions of Shicaocun Mine and its genesis mechanism, the present-day geothermal temperature field, geothermal temperature gradient field and geothermal heat flow distribution characteristics of the study area were comprehensively elaborated on the basis of temperature measurement data from seven exploration lines and 36 boreholes in the well field, and the conditions for the formation of geothermal resources were also analysed. The study shows that the Shicaocun coal mine is located in the geothermal area (II2) of Lingwu Depression, with the present-day geothermal temperature gradient ranging from 2.53 to 3.84℃/100m, and the geodetic heat flow values ranging from 47.6mW/m2 to 72.1mW/m2, the geothermal temperature field is characterised as low in the centre in the horizontal direction, high in the north-east and south-west flanks, low in the north and high in the south in the vertical direction, and the geothermal temperature gradient field and the heat flow field are characterised as low in the north-east and high in the north-west, and the rest of the locations are relatively uniformly distributed. The study area is a high-temperature anomaly area, and there are first- and second-degree thermal hazard areas. The geothermal fluid recharge mainly originates from atmospheric precipitation and transcurrent recharge, with slow runoff and high mineralisation. The Jurassic Yan'an Formation sandstone thermal storage type is layered and banded thermal storage, and the thermal storage layer is Jurassic Yan'an Formation sandstone, capped by mudstone and shale. Calculated by volumetric method, the geothermal resource is 1.29×101?J, and the recoverable heat is 1.29×101?J, which is equivalent to about 4.4×106t of standard coal, and the total thermal power is 13.6MW, and the heating area can be up to 340,000m2. The research results can provide theoretical basis for 31 mining area mining engineering.

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