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不同节理角度和地应力条件下岩石双孔爆破的数值模拟

魏晨慧 朱万成 白羽 李帅

魏晨慧, 朱万成, 白羽, 李帅. 不同节理角度和地应力条件下岩石双孔爆破的数值模拟[J]. 力学学报, 2016, 48(4): 926-935. doi: 10.6052/0459-1879-15-259
引用本文: 魏晨慧, 朱万成, 白羽, 李帅. 不同节理角度和地应力条件下岩石双孔爆破的数值模拟[J]. 力学学报, 2016, 48(4): 926-935. doi: 10.6052/0459-1879-15-259
Wei Chenhui, Zhu Wancheng, Bai Yu, Li Shuai. NUMERICAL SIMULATION ON TWO-HOLE BLASTING OF ROCK UNDER DIFFERENT JOINT ANGLES AND IN-SITU STRESS CONDITIONS[J]. Chinese Journal of Theoretical and Applied Mechanics, 2016, 48(4): 926-935. doi: 10.6052/0459-1879-15-259
Citation: Wei Chenhui, Zhu Wancheng, Bai Yu, Li Shuai. NUMERICAL SIMULATION ON TWO-HOLE BLASTING OF ROCK UNDER DIFFERENT JOINT ANGLES AND IN-SITU STRESS CONDITIONS[J]. Chinese Journal of Theoretical and Applied Mechanics, 2016, 48(4): 926-935. doi: 10.6052/0459-1879-15-259

不同节理角度和地应力条件下岩石双孔爆破的数值模拟

doi: 10.6052/0459-1879-15-259
基金项目: 国家自然科学基金(51304037,51374049,51525402) 和中央高校基本科研业务费(N140105001,N140104007) 资助项目.
详细信息
    通讯作者:

    朱万成,教授,主要研究方向:岩石力学.E-mail:zhuwancheng@mail.neu.edu.cn

  • 中图分类号: O383;TD235

NUMERICAL SIMULATION ON TWO-HOLE BLASTING OF ROCK UNDER DIFFERENT JOINT ANGLES AND IN-SITU STRESS CONDITIONS

  • 摘要: 在采矿工程、地下交通工程和水利水电工程等岩体开挖工程中,爆破法仍是一种主要的破岩方法. 实际天然岩体中存在的裂隙、节理等不连续面和所处的地应力场环境,都会对爆破荷载传播过程和最终的破碎效果产生重要影响. 本文把岩石爆破视为爆炸应力波动态作用和爆生气体压力准静态作用两个独立的先后作用过程,同时考虑初始应力场的静态作用,建立岩石爆破的力学模型. 基于渗流方程描述爆生气体在爆生裂纹中的传播过程,进而基于流固耦合理论实现爆生气体准静态压力对裂纹尖端的力学作用. 爆炸应力波主要在孔周引起压碎区和径向微裂纹区,随后爆生气体压力楔入径向裂纹尖端,促使裂纹进一步扩展,形成径向主裂纹. 数值模型可以再现孔周压碎区、径向微裂纹区、径向主裂纹区萌生、扩展的完整演化过程. 针对不同节理角度和地应力条件下岩石双孔爆破过程的数值模拟结果表明,初始地应力场的压应力作用不利于爆生裂纹的萌生与扩展,但节理的存在对裂纹的扩展具有明显的导向和促进作用,有利于爆生裂纹沿节理面方向的扩展.

     

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出版历程
  • 收稿日期:  2015-07-07
  • 修回日期:  2016-04-18
  • 刊出日期:  2016-07-18

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