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《Science & Technology of Baotou Steel》 2010-03
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Application of Presplitting Hole and Via Hole with Same Aperture in By-boundary Blasting

YANG Xia,GAO Fei,LI Bin(Baiyunebo Iron Mine of Baotou Steel(Group) Corp.,Baotou 014080,Nei Monggol,China)  
The half porosity of by-boundary blasting is increased,the effects of shock absorption are improved,and the impact force of by-boundary blasting to side slope is decreased by applying the blasting technique with same aperture(Φ 165 mm or Φ 200 mm) of via hole and presplitting hole.Moreover,the completion and stability of side slope could be protected more effectively and permanently.
【CateGory Index】: TD235.3
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