The Distributional Characteristics and Its Geneses Discussionof Structure-destroyed on the Qinan Coal Mine NO.7_2 Coal Seam

By the interpreting logging methods,we analyzed the coal mass structure of No.72 coal seam in Qinan mine and plotted the isoline of coal seam thickness.We summarized the distributing characteristics of tectonic coal and discussed the genesis of tectonic coal.The results showed that the thickness of tectonic coal distributes alternatively thin and thick along the strike and the dipping direction and the geometries of tectonic coal are basically in accordance with folds'.Its formation is mainly controlled by the regional tectonic stress.