南芬铁矿降低露天矿爆破震动的实践

加强对井巷附近爆破的控制，可降低爆破地震效应对井巷的破坏。南芬铁矿在实践中，通过改变起爆系统、炮孔装药结构及炮孔直径与孔网参数来控制同时起爆的炸药量，从而达到降低井巷附近的爆破对井巷的破坏作用的目的。对所采用的多种降震措施作了详细的介绍。

Practice in Reducing the Blasting Vibration at Nanfen Iron Mine

Improving the control of blasting near mining excavation can reduce a damage of blasting vibration effect to mining excavation. At Nanfen iron mine, the practice in blasting was that the priming system, the charging structure, the blasthole diameter and the parameters of blasthole grid were changed to control a quantity of explosive priming at the same time so as to reduce a damage of blasting to the near-by mining excavation. A detail introduction to many measures taken to reduce the blasting vibration is made.