2011•Engineering BlastingRequires access

APPLICATION OF HEADING BLASTING TECHNOLOGY IN MINGLI IRON MINE

Liu Yang-fan

Abstract

According to the problems of poor effect and low efficiency of the heading blasting in the rock tunnel of Mingli Iron Mine,the boreholes disposition,charge quantify and detonating delay were optimized by comprehensively applying the technologies of heading blasting and smooth blasting.As a result,each circulation heading level reached 2.5m and each month heading level increased to 150m from original 72m,which observably decreased construction time and improved production efficiency.The scheme of heading blasting shows great advantage in excavation the rock tunnel and offers guidance for the similar project.

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Key concepts: Heading (navigation), Rock blasting, Excavation, Engineering, Borehole, Mining engineering, Geotechnical engineering, Aerospace engineering