The Analysis And Evaluation Of Geological Structure About Xingdong Coal Mine

Resources is important for a country's economic development. In the coming decades, the supply and demand of coal resources is still tight in China, so, the intensity of coal resources exploitation will increase. The tectonic conditions of Xingdong Minefield is unique and complex. Therefore, a profound understanding of the mine's tectonic objective law and accurate assessment of the complexity of the mine structure, Its purpose is to choose reasonable areas for mechanized coal mining and to provide a scientific basis for high efficient utilization of resources.The thesis analyze the regional tectonic setting of the study area and sum up the mine's development of fault, folding,magmatism and collapse columns in further. Analyze the tectonic development degree of Xingdong Minefield in Fuzzy comprehensive evaluation; forecast evaluation parameter values of un-mining area in gray theory, and evaluate the un-mining area. Thesis work to achieve the following results:(1) Xing Dong Minefiled geological structure is complex and extensional tectonic zone, fault structures are all sheets or transtensional normal fault, so far there is no reverse faults. The large and medium faults which gap greater than 20m are as many as 59 in the filed.The fault can be divided into two groups, one group NNW direction, the other for the NE direction. In which, the NNW direction fracture constitute the Minefield's eastern and western borders; NE direction fracture constitute the Minefield's main fault structure at all levels.The plan ecombination of fault mainly are "into" shape, dendritic, network-like ,echelon and so on, the profile combined type mainly are type of ladder, Graben and horst-type.(2) Use Fuzzy comprehensive evaluation, study the eastern and western 142 unit of Xingdong Mine which has been mining area, the result are: 18 units of classâ…£, 46 units of classâ…¢, 38 units of classâ…¡and 38 units of classâ… . Evaluation results are consensus with the actual exposed exploitation situation.Forecast evaluation parameter values of un-mining area in gray theory and evaluate the un-mining area. Evaluation results: the construction of every units of un-mining in the central areâ… ,â…¡,â…¢andâ…£, and the proportions ofâ… andâ…¡type is larger, so the complex degree of whole structure of un-mining central is lower.The construction of every units of un-mining in the west are allâ…£, and with a higher complex degree of structure. The construction of every units of un-mining in the east areâ…¡,â…¢andâ…£type, most areâ…¢andâ…£type, and with a higher complex degree of structure.