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Deep Hole Pre -splitting Joint Sealing Holes Blasting Technology Research
Pages: 10-12
Year: Issue:  9
Journal: Coal

Keyword:  pre -splitting blastingthe upward holehole sealingsecurityefficiency;
Abstract: For the uplink blasting hole sealing difficulties and prone to punching process complex problems existing hole sealing meth-od,put forward the "Sand tube +Polyurethane"+Yellow Earth joint hole sealing method,and 6116 working face of deep hole pre -splitting blasting experiment in Wangzhuang Coal Mine,the new joint hole sealing methods for application of test results verify the safety of the hole sealing method reduce upward blasting hole punching,and greatly improve the efficiency of hole sealing.
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