关键词: 闽西煤矿区, 地质构造, 构造特征, 演化模式, 构造体系

Abstract: In order to clarify the basic situation of geological structures in coal mining area of western Fujian，by analyzing the regional tectonic background where it is located and combining the engineering da⁃ ta exposed in production practice，the basic characteristics of geological structures such as folds，(gentle) faults and quasi-contemporaneous structures in coal mining area of western Fujian，were statistically ana⁃ lyzed and preliminarily summarized by using the tectonic analysis method. On this basis，the tectonic stress field and evolution model of the area were preliminarily studied. The results show that the superposition of the near EW trending structures and the early EW trending structural reconstruction make the regional struc⁃ tures more complicated. The typical structures in the area generally belong to the superposition type of down⁃ ward sliding and upward pushing，upward sliding and downward pushing，or both sliding and pushing. The fold structures are mainly oriented in the near NE and NWW directions，which are basically consistent with the distribution direction of the main regional geological structures. The fault structures are mainly strike�slip faults and high-angle faults，which are basically consistent with the main stress directions of the region⁃ al tectonic stress field，they have undergone multiple major tectonic changes such as the late Indosinian pe⁃riod，early to late Yanshan period，and late Himalayan period，and correspond to the formation and evolu⁃ tion of the sliding cover structure，thrust nappe or thrust-slip type boundary faults，and coal-controlling structures. Moreover，the magmatic activity of the Yanshan period played a decisive role in the formation of the overall structural profile such as the thrust nappe structure. This study can provide some theoretical refer⁃ ence for searching hidden coal resources and safety management of coal mine roof or other aspects in areas with similar structural characteristics in the future.

Key words: coal mining area of western Fujian, geological structure, structural characteristics, evolu? tion model, tectonic system