杜军,王明伟,郑俊伟,金宏洋,冯凯,刘增辉,哈守斌

• 1:山西江阳工程爆破有限公司

摘要(Abstract)：

露天采场尤其铜钴氧化矿，矿石区域较多的呈现蜂窝状矿石构造，并伴随有大量的节理、溶洞等地质缺陷，这对采剥作业造成了较大的困难，尤其在穿爆环节，出现钻孔成孔率低，大块率高，松散度差，根底多等多类质量缺陷。这不仅严重影响了后续的挖装作业效率，同时也带来安全方面的隐患。针对铜钴氧化矿蜂窝状矿石构造的爆破效果，在经济合理的条件下，从降低钻孔深度、减小钻孔孔径提高钻孔成孔率、防静电PVC管及包装型乳化炸药吊装等方式约束装药提高装药高度、调整爆破参数3个方面用于改善爆破质量，以满足后续施工作业的要求。结果表明:该方法对于爆破后的大块率、根底率及松散度指标有较大的改善，基本满足后续挖装运输要求，有利于露天采场下一循环的采剥作业。

关键词(KeyWords)： 台阶爆破;蜂窝状矿石构造;大块率;松散度;根底率;约束装药

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 杜军,王明伟,郑俊伟,金宏洋,冯凯,刘增辉,哈守斌

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