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淮北煤田的高温热害问题愈发突出,但目前对该区系统的地温场特征及大地热流分布研究非常稀少.在系统分析淮北煤田大量地面钻孔井温测井数据和井下巷道围岩温度测试数据的基础上,结合72块岩石样品的热导率测试结果,全面阐述了该区现今地温梯度和大地热流的分布特征.研究表明:淮北煤田现今地温梯度众值介于1.80~2.80℃/100m之间,平均地温梯度为2.42℃/100m;大地热流值变化范围为39.52~74.12mW/m2,平均热流值为55.72mW/m2,地温梯度和热流值均低于同处华北板块的其他盆地以及南部的淮南煤田;大地热流受地温梯度控制明显,两者分布较为相似,整体表现为南高北低、西高东低的特点.结果表明,区内现今地温场和热流分布主要受区域地质背景和区内构造格局的控制.
The problem of high temperature and thermal damage in Huaibei Coalfield is becoming more and more prominent, but at present, the study on the characteristics of geotemperature field and the distribution of geothermal heat flow in this area are scarce.A lot of ground borehole temperature logging data and surrounding rock temperature test Based on the data and the test results of thermal conductivity of 72 rock samples, the present geothermal gradient and geothermal heat distribution in this area are comprehensively expounded. The results show that the present geothermal gradients in Huaibei Coalfield are between 1.80 ~ 2.80 ℃ / 100m , The average temperature gradient is 2.42 ℃ / 100m, the range of geothermal flow is 39.52-74.12mW / m2, the average heat flow is 55.72mW / m2, and the geothermal gradient and heat flow are lower than other basins in North China Plateau The southern Huainan coalfield is well controlled by the geothermal gradient, and the distribution of the geothermal heat flux is similar, showing the characteristics of low south and high in the north, high in the west and low in the east. The results show that the distribution of geothermal field and heat flux in the area is mainly affected by the regional geological background and Regional structure of the control structure.