中文摘要：

淮北煤田位于徐宿弧形推覆构造带前缘和外缘带。通过分析区域地质资料，并结合野外地质调查，探讨了淮北煤田的构造、演化特征及其形成机制。结果表明：①以宿北断裂为界将淮北煤田划分为南、北2个构造分区，北区构造线总体走向近SN—NNE，呈向西凸出的弧形展布，以逆冲断层为主，发育侏罗山式长轴褶皱；南区构造线走向NNW和NNE，以正断层和开阔短轴褶皱为主。②北区处于徐宿推覆构造主体部位，萧县背斜及其以东地区为上盘推覆体，萧县背斜以西地区属上盘推覆体；南区以西寺坡断层为界，该断层以东地带位于徐宿弧形构造带东南末端，属推覆构造上覆系统，西寺坡断层以西地区为推覆体下伏系统。③自石炭–二叠纪含煤地层沉积后，淮北煤田至少经历了3期较大的构造事件，即印支期近SN方向的挤压，形成近EW向断裂构造为主；燕山早期NWW—SEE方向的强烈挤压作用，形成徐宿弧形构造；燕山晚期NNE—SSW方向挤压，在煤田内形成大量NNE—SSW方向正断层。

英文摘要：

Huaibei coalfield lies on the leading edge and outskirts of the Xusu arc thrust belt.The paper discussed the structural features,tectonic evolution and forming mechanism of the Huaibei coalfield based on the field geological survey and a synthesis of available data.The results show that:①Huaibei coalfield could be subdivided into the northern and the southern units along Subei fault.The northern unit is featured by thrust faults and Jurassic-type folds distributed as an arc belt protruding westward,of which tectonic lines are characterized by SN-NEE strikes.The southern unit has got tectonic lines that strike NNW and NNE,and dominated by normal faults and open short-axis folds.②The secondary subdivision of the southern and northern structural units is in line with the faults developed along the leading edge of the nappe,and structural analyses have been conducted within these units.The northern unit is a part of the mainbody of the Xusu thrust.The hanging wall of the thrust comprises the Xiaoxian anticline and area to its east,while the footwall lies to the west of the anticline.As for the southern unit,the hanging wall in the east of Xisipo fault composes the southeastern end of the Xusu arc structure,while footwall lies to the west of the fault.③It could be clarified that Huaibei coalfield has experienced three major tectonic events since the deposition of coal-bearing strata during Carboniferous-Permian,namely S-N compression during Indo-China period which formed the E-W fractures,the early Yanshanian NWW-SEE compression that formed Xusu arc structure belt,and the late Yanshanian NNE-SSW compression that triggered the voluminous NNE-SSW normal faults within the coalfield.