黄金科学技术 ›› 2019, Vol. 27 ›› Issue (5): 687-695.doi: 10.11872/j.issn.1005-2518.2019.05.687
Jun TIAN1(),Jianpo LIU1,2(),Yong YANG3,Changyin ZHANG1
摘要:
针对焦家金矿进路充填法爆破扰动诱发充填体破坏严重的问题,基于Mises屈服准则确定充填体破坏阈值,采用LS-DYNA软件对炮孔距充填体距离、充填体养护龄期与充填体破坏范围之间的关系进行了数值模拟研究。结果表明:充填体的破坏范围与炮孔距充填体距离(孔边距)呈线性关系,随着孔边距的增加,充填体的破坏范围逐渐减小;充填体的破坏范围与其养护龄期密切相关,随着养护龄期的增加,充填体的破坏范围逐渐减小,且超过7 d养护龄期后,充填体的破坏范围受爆破扰动影响明显减弱。该研究成果为现场爆破参数优化和回采时间的确定提供了理论依据。
中图分类号:
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