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(一)前言爆破在金属矿山开采过程中的费用占采矿成本的20～30％,爆破质量对铲装运效率也有直接的影响,这已普遍为矿山工作人员所关注。在爆破的研究试验过程中,一般也把铲装运效率作为重要的技术经济指标来考核。通常认为,矿山企业最终产品是精矿,采矿只是为选矿提供充足的合格矿石,因此,进行爆破崩矿,只要求尽量降低大块率,减少二次破碎。对于通过提高矿石的破碎度和进一步降低矿块的强度来改善选矿的碎矿特性问题,则很少得到人们的
(I) Foreword Blasting costs about 20-30% of the cost of mining during the mining of metal mines. Blasting quality also has a direct impact on the efficiency of shovel loading, which has been of general concern to mine workers. In the blasting research and testing process, the efficiency of shovel loading is also generally considered as an important technical and economic index. It is generally believed that the final product of mining enterprises is concentrate. Mining only provides sufficient qualified ore for ore dressing. Therefore, blasting and collapsing only require minimizing the bulk rate and reducing secondary crushing. Little is known about the problem of beneficiation by improving ore crushing and further reducing the strength of the ore mass