Research on development law of structure and coal controlling effect in Jiangzhuang Coal Mine
The structure of Jiangzhuang Coal Mine is relatively complex.It is beneficial to the efficient and safe production of the mine to clarify the structural development law and reveal its structural coal controlling effects of coal.The faults and folds in the mine were sys-tematically analyzed by using mathematical statistical methods,and the controlling effects of different structural combinations on the main mining coal seams were summarized.The results show that the faults and folds in the mining area are mainly orientated NE-SW,the commonly developed normal faults cut the folds at a high angle of 70°～79°,and the fault throw is generally greater than 20 m,and the reverse faults are less developed.It is found that the longer the plane extension length of the fault,the greater its throw.In the central part of the mining area,continuous wide and gentle folds are developed,and there are few faults in the fold area.In the northwest,there are Yanshanian diorite porphyrite intrusion coal seams.According to the characteristics of structural combination in the study area,four types of structural coal control styles were summarized:①graben and horst structure coal control style;②ladder fault structure coal con-trol style;③fault-fold structure coal controlling style;④fault and magmatic intrusion structure coal controlling style.The biggest com-mon feature is that the coal seam is cut into narrow and long fault blocks with strike NE.
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