Coal-controlled characteristics and mechanism of fold-fault structure in Lianyuan Area of central Hunan Province

To study multi-phase, multi-layered regional sliding structures, the characteristics and mechanism of structure coal-controlled action of Lianyuan Area in central Hunan Province by adopting the theories and methods of modern geology and structural analysis, and combined with the field strata cross-section, prospecting | ine and rock mechanics parameters, the favorable areas of coal were proposed.The results show that the detached sliding fault develops in all mine areas, and most of these faults slide along the top of the Ceshui Formation coal, sometimes they bevel the strata, fault attitude is in accordance with stratigraphic attitude, the inclined ang . e of detached fault is steep in the shallow buried depth of surface, and become gentle in deeper layer.Detached faults are mainly developed at the top of coal seam, whi ch are favorable to the save of coal resources occurrence, and make the buried depth of coal bed become shallower; it is favorable to search for coal in the periphery of the old mining area.Mutiple factors, including the evolution background of structures, the control action of multi-layered detachment layers, differences of lithological as sociation exist between overlying strata and underlying strata, and the controlling of deep structure and basement property on shallow structures, etc, have determined the deformation characteristics of strcture in Lianyuan Area.