黄金科学技术 ›› 2024, Vol. 32 ›› Issue (2): 318-329.doi: 10.11872/j.issn.1005-2518.2024.02.160
邱泓杰1(),邱贤阳1(),张舒1,陈辉2,史秀志1,沈文博1,陶铁军3,段武全4
Hongjie QIU1(),Xianyang QIU1(),Shu ZHANG1,Hui CHEN2,Xiuzhi SHI1,Wenbo SHEN1,Tiejun TAO3,Wuquan DUAN4
摘要:
为探究深井高应力环境下,采场束状组合孔拉槽爆破损伤破裂规律,采用LS-DYNA数值分析软件进行研究。通过建立平面数值模型,分析了无静应力、单向静应力和双向等值静应力3种条件下束状组合孔爆破破裂损伤情况。此外,对不同静应力条件下束状组合孔的孔间距和外围辅助空孔的布置方式进行优化,并进行工程试验验证。研究结果表明:相比无静应力条件,单向静应力和双向等值静应力条件下束状组合孔爆破损伤裂纹扩展受到抑制,静应力越大,抑制作用越显著。工程实践表明,根据静应力的大小调整束状组合孔孔间距和外围辅助孔布置方式,能够获得良好的拉槽爆破破岩效果。
中图分类号:
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