罗志华,史秀志,陈飞,邱贤阳,霍晓锋

• 1:中南大学资源与安全工程学院

摘要(Abstract)：

粉矿率是矿山经济技术指标评定的重要因素之一,粉矿数量多会增大铲装、运输的难度,也会扩大矿石损失进而影响矿山开采经济效益。为了在爆破开采过程中有效降低粉矿的数量,减少矿山的损失,提高经济效益,通过ANSYS/LS-DYNA数值模拟的方法,分析模型单元失效比例和运用块度处理系统加工处理模型裂纹进一步分析块度,研究径向不耦合装药对粉矿控制的影响。研究结果得出:当炮孔直径为110 m时,随着药包直径从60 mm增大到110 mm,整体失效体积比例由27.83%增大到46.73%,岩体破碎粉矿程度逐渐增高,与此同时,大块率比例由初始的17.60%先下降至0再升高至20.01%。药包直径在80 mm时,粉矿率低,大块率符合要求。现场实证表明:优化后的装药药包直径爆破过程中,所产生粉矿有明显的降低,且块度适中。

关键词(KeyWords)： 粉矿;径向不耦合装药;块度;裂纹

Abstract:

Keywords:

基金项目(Foundation): “十三五”国家重点研发计划课题(2017YFC0602902)

作者(Author): 罗志华,史秀志,陈飞,邱贤阳,霍晓锋

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