Study on Deep-hole Pre-splitting Blasting Hole Sealing Technique

Deep-hole pre-splitting loose blasting for hard roof is widely used in the prevention of large-scale roof weighting, rock burst at mining working face and other aspects. In order to the prevent the leakage of explosive gas in loose explosion, reduce energy loss and protect blasting effect, we deeply study the sealing and filling forms of blast holes, and verify the application effect of deep-hole pre-splitting loose blasting hole sealing technique.