孔口孔底双导爆管不同段起爆方式微差爆破在铜矿峪矿的应用

APPLICATION OF HOLE TOP AND BOTTOM HOLE WITH MILLISECOND BLASTING IN STAGE IGNITION TO TONGKUANGYU

地下中深孔微差爆破,采用孔口孔底双导爆管不同段起爆方式,克服了孔口起爆孔底易留残眼、岩墙的缺点,克服了单式孔底起爆可靠性低,易拒爆的缺点,爆破效果好,适用条件广,采矿成本较低,本文对其爆破理论和实践进行了总结,建议推广使用。

In underground medium long-hole millisecond blasting hole top and bottom hole with millisecond detonation in stages were employed, overcoming the defect of dead hole and dike at bottom, the defect of low reliability of the ignition at bottom with single hole at bottom and the defect of misfire. The blasting was a successful one in terms of its good result, extensive adopting, conditions and low cost. The paper summarizes the blasting theory and practical experience and suggests the type of blasting be used extensively.