Research on Initial-mining Roof Blasting in Shallow Buried Coal-seam

In Shendong shallow-buried mining area,hard roof weighting is very strong and roof extensive collapse can result in typhoon in initial mining phrase.This paper analyzed roof disaster reason of shallow buried coal-seam in initial mining phrase,and obtained whether the roof should be forced caved by constructing hanging roof mechanical model for shallow buried coal-seam.The method of determining rational roof caving height was put forward.Field practice showed that the roof control project by this method was feasible and application effect was good.