潘集矿区深部现今地温场特征及其构造控制  

Distribution Characteristics of the Present-day Geothermal Field and Its Structural Controls in Deep Part of Panji Mining Area

作　　者：彭涛[1] 任自强[2,3] 吴基文[4] 张红梅[4] 

机构地区：[1]西安科技大学地质与环境学院,西安710054 [2]中国科学院边缘海地质重点实验室中国科学院南海海洋研究所,广州510301 [3]中国科学院大学,北京100049 [4]安徽理工大学地球与环境学院,淮南232001

出　　处：《高校地质学报》2017年第1期157-164,共8页Geological Journal of China Universities

基　　金：西安科技大学培育基金(6310216008);西安科技大学博士启动基金(2016QDJ024);安徽高校自然科学重点项目;矿山地质灾害防治安徽省重点实验室项目(KJ2016A826)

摘　　要：潘集矿区深部勘查区是淮南煤田未来主要的接替资源地,但煤炭深部开采必然会面临严峻的地热地质问题,而前人对该区的研究多局限于浅层地温资料的预测评价,制约了对深部地热条件的认识。为此,此次依据潘集矿区深部最新的地面钻孔井温测井数据,结合浅层地温和井下巷道岩温测试等相关地质资料,研究该区现今地温场特征,并从多方面分析地质构造对该区地温场的控制作用。研究成果表明,在垂向上地温与深度呈较好的正相关关系,地温梯度整体上随深度的增加而递减;平面上地温梯度介于20.9~36.2℃/km之间,平均值为26.7℃/km,总体上呈由潘集背斜核部向两翼和外围逐渐降低的趋势。该区现今地温场主要受潘集背斜的构造控制,导水断层也是该区局部地温异常的主要原因之一,岩浆岩的放射性生热作用也在一定程度上影响煤系岩层的生热结构。The deep exploration zone of the Panji mining area is a main successive resource region of the Huainan coalfield. However,the serious geothermal problem has to be confronted in the deep mining process. Previous studies of the prediction and evaluation of geothermal data are limited to the shallow area. Based on the latest logging data of temperature in wells of surface boreholes in the region and combined with geological data of shallow geotemperature and test of rock temperature of roadways,the present-day geothermal characteristics in this region have been presented and the controlling effect of geological structures on the geotemperature field has been analyzed from multiple aspects. The results show that there is a positive correlation between temperature and depth of the deep zone of the Panji mining area and the geothermal gradient decreases with the increase in depth. Also,the geothermal gradient is between 20. 9℃/km and 36. 2 ℃/km in the plane with an average of 26. 7 ℃/km,while there is a decreasing trend from the core of Panji anticline to its limbs. In addition,the present-day geotemperature field is mainly controlled by the Panji anticline,but water-conductive fault is also the main reason leading to the regional geothermal anomalies along with the influence of radioactive thermogenesis of magmatite on the thermal structure of coal measure strata to some extent.

关 键 词：现今地温场 地温梯度 构造控制 潘集矿区深部 

分 类 号：P314[天文地球—固体地球物理学]