Discussion on Mine Strata Pressure Law and Formation of Fully Mechanized Top Coal Caving Mining Face in High Inclined Seam with Short Distance to Neighbouring Coal Mining Faces

With the analysis on the mine strata pressure measured data of the fully mechanized top coal caving mining face in high inclined seam with short distance neighbouring coal mining faces,the mine strata pressure behavior law of the coal mining face was obtained.The pressurized step at the middle of the coal mining face was small,the pressurized strength was low and the intrinsic formation cause was further discussed.The mutual mining influences of the coal mining faces in high inclined seam with short distance to each other showed that the middle and two ends of the coal mining face would have two different overburden strata structure model,the middle of the coal face would mainly take the static load function and the two end of the coal face would take the dynamic load function.