皇新宇;纪强;张宪堂;焦淑军;魏海霞;

• 1:山东科技大学山东省土木工程防灾减灾重点实验室
• 2:山东科技大学土木工程与建筑学院
• 3:日照市政工程有限公司
• 4:河南理工大学土木工程学院

摘要(Abstract)：

为研究地应力作用下岩石爆破破岩机理，基于RHT本构建立岩石四孔掏槽爆破模型，对不同地应力条件下掏槽爆破岩石损伤裂纹的演化规律和炮孔周围应力场动态变化过程进行数值模拟研究。结果表明：地应力抑制了掏槽爆破损伤裂纹的扩展，随着地应力的增大，掏槽损伤区域减小，切向拉应力峰值降低；侧压系数的变化体现了爆破损伤裂纹扩展的各向异性，损伤裂纹扩展趋向最大地应力方向；设置空孔能够对爆炸应力波产生导向作用，促进炮孔间损伤裂纹的贯穿和发育，改善掏槽爆破破岩效果。

关键词(KeyWords)： 高地应力;四孔掏槽爆破;损伤演化;切向拉应力;数值模拟

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51874189);; 山东省自然科学基金项目(ZR2017MEE043);; 山东研究生教育创新计划项目(SDYY15086,SDYY15088)

作者(Authors): 皇新宇;纪强;张宪堂;焦淑军;魏海霞;

DOI: 10.16452/j.cnki.sdkjzk.2022.02.007

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