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一、前言 良山铁矿矿石为条带状石英磁铁矿,分原生矿和氧化矿两种,原生矿f=12～14,比重3.3吨/米~3,主要设备为 4、4.6米~3电铲和YQ-150A型潜孔钻机,根据选厂破碎能力,确定大块标准为每边长不大于0.4米,二次破碎采用敷药爆破。 近年来良山铁矿露采二次破碎费用与爆破总成本的比值高达40％,个别月份甚至超过台阶爆破成本。我们应用计算机对不同爆
I. INTRODUCTION The Liangshan Iron Ore Minerals is a banded quartz magnetite, which is divided into two types of primary ore and oxide ore. Primary ore f = 12-14, the proportion of 3.3 tons / m ~ 3, the main equipment is 4,4.6 meters ~ 3 shovels and YQ-150A DTH drilling rigs, according to the election plant crushing capacity, to determine the large standard length of not more than 0.4 meters on each side, the second crushing dressing blasting. In recent years, the ratio of secondary crushing cost to total cost of blasting in Liangshan Iron Mine is as high as 40%, and in some months it even exceeds the cost of bench blasting. We apply computers to different explosions