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现代矿业 ›› 2022, Vol. 38 ›› Issue (08): 77-.

• 采矿工程 • 上一篇    下一篇

抚顺西露天矿台阶致裂爆破多炮孔相互作用

于永军1,2 杨晓琴1,2 高广来3 刘允秋4   

  1. 1. 原位改性采矿教育部重点实验室;2. 太原理工大学矿业工程学院; 3. 抚顺市应急管理局;4. 中钢集团马鞍山矿山研究总院股份有限公司
  • 出版日期:2022-08-25 发布日期:2023-06-02
  • 基金资助:
    *国家自然科学基金(编号:51504159);太原理工大学2014 校青年(团队)基金(编号:2014TD008)。

Multi-hole Interaction of Bench Fracturing Blasting in Fushun West Open-pit Mine

YU Yongjun1,2 YANG Xiaoqin1,2 GAO Guanglai3 LIU Yunqiu4   

  1. 1. Ministry of Education Key Laboratory of In-situ Modified Mining;2. School of Mining Engineering, Taiyuan University of Technology;3. Fushun Emergency Management Bureau;4. Sinosteel Maanshan Gen⁃ eral Institute of Mining Research Co.,Ltd.
  • Online:2022-08-25 Published:2023-06-02

摘要: 为揭示爆破钻孔起裂相互作用和裂缝扩展效果,建立露天矿体—地下水耦合力学 模型,通过编程计算研究抚顺西露天矿台阶多炮孔爆破裂缝扩展特性,探究台阶地表以下矿体在 疏干、含有线性分布承压水以及浅层布孔工况下的钻孔与裂缝相互作用关系。结果表明,台阶爆 破过程中由多炮孔间相互干扰导致起裂具有时差特性,矿体含水与炮孔深度均对此效应有影响; 前者主要是有效应力增大了致裂破岩效果,后者是由于煤岩受载及其非均质性改变了炮孔起裂 顺序。

关键词: 爆破致裂, 裂缝干扰, 损伤计算, 露天矿

Abstract: In order to reveal the crack initiation interaction and crack propagation effect of blasting boreholes,the coupling mechanical model of open-pit mine body and groundwater was established. The crack propagation characteristics of bench multi-hole blasting in Fushun West Open-pit Mine were studied by programming calculation,and the interaction relationship between boreholes and cracks of ore bodies below the bench surface under the conditions of dredging,containing linear distribution of confined water and shallow hole distribution was explored. The results show that in the process of bench blasting,the crack initiation caused by mutual interference between multiple boreholes has time difference characteris⁃ tics,and the water content of ore body and the depth of borehole have influence on this effect. The former is mainly due to the effect of stress increasing the effect of fracturing and rock breaking,and the latter is due to the loading and heterogeneity of coal and rock changing the sequence of blasthole initiation.

Key words: blast cracking, crack interference, damage calculation, open-pit mine