Extreme Distance Cross Mining Technology in Shaping Coal Mine 8^# Upper Coal Seam

To guarantee the safety mining of extreme distance cross abandoned roadway in Shaping Coal Mine 8^# upper coal seam, the thickness and carrying capacity of interlayer rock's effective bearing layer is analyzed, thus the reasonable parameters of dense wood crib filling support is determined, and a series of safety techincal measures were taken in the process of cross mining. The result of mine ground pressure monitoring in workface and empty roadways showed that the severe deformation and failure of surrounding rock of empty roadways did not happen in the process of cross mining, so the rationality of wood crib support and the effectiveness of safety technical measures were verified.