基于分形理论的大直径深孔爆破块度分析

爆破块度作为爆破效果评估的重要因素,对于铲装运输等后续采矿工艺的开展具有极其重要的影响。基于凡口铅锌矿爆破块度优化的现场需要,对三种地下深孔爆破装药结构开展了爆破块度对比分析,运用分形理论研究了装药结构与爆破块度的关系。分析结果表明:分形维数与爆破块度呈现正相关关系,第一种装药结构最为合理,其爆破块度适中,爆破效果最好。研究成果为凡口铅锌矿爆破工艺优化提供了指导,为类似矿山生产实践提供了参考。

Fragmentation Size Analysis of Large-diameter Longhole Blasting Based on Fractal Theory

Fragmentation size, an important factor of blasting effect evaluation, has an extremely important impact on the subsequent mining process such as shovel loading. Based on the requirement of fragmentation size optimization of Fankou Lead-zinc Mine, three blast trials with different charging structure design were carried out, and the fragmentation size were correspondly analyzed based on the fractal theory. The obtained results show that the fractal dimension and fragmentation size are positively correlated, and the first charging structure design is the optimal design with the moderate fragmentation size in the blasted muck pile. The research conclusions can provide guidance of the blasting process optimization of Fankou Lead-zinc Mine and technical reference for the similar mines.