东北大学学报:自然科学版 ›› 2016, Vol. 37 ›› Issue (12): 1778-1783.DOI: 10.12068/j.issn.1005-3026.2016.12.023

• 资源与土木工程 • 上一篇    下一篇

高压水射流螺旋式切槽辅助松动爆破模型

粟登峰1, 康勇1,2, 王晓川1,2, 郑丹丹3   

  1. (1. 重庆大学 煤矿灾害动力学与控制国家重点实验室, 重庆400030; 2. 武汉大学 水射流理论与新技术湖北省重点实验室, 湖北 武汉430072; 3. 四川国泰民安科技有限公司, 四川 成都610100)
  • 收稿日期:2015-08-25 修回日期:2015-08-25 出版日期:2016-12-15 发布日期:2016-12-23
  • 通讯作者: 粟登峰
  • 作者简介:粟登峰(1989-),男,四川内江人,重庆大学博士研究生; 康勇(1978-),男,宁夏西吉人,武汉大学教授,博士生导师.
  • 基金资助:
    国家重点基础研究发展计划项目(2014CB239203); 教育部新世纪优秀人才支持计划项目(NCET-12-0424); 教育部留学回国基金资助项目(教外司留→[2012]940号); 煤矿灾害动力学与控制国家重点实验室访问学者基金资助项目(2011DA105287-FW201205).

Model of Loosen Blasting Assisted by High-Pressure Water Jet Spiral-Notch

SU Deng-feng1, KANG Yong1,2, WANG Xiao-chuan1,2, ZHENG Dan-dan3   

  1. 1.State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400030, China; 2. Hubei Key Laboratory of Waterjet Theory & New Technology, Wuhan University, Wuhan 430072, China; 3. Sichuan Guotaiminan Science and Technology Co.,Ltd, Chengdu 610100, China.
  • Received:2015-08-25 Revised:2015-08-25 Online:2016-12-15 Published:2016-12-23
  • Contact: KANG Yong
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摘要: 基于水射流独特的切割优势提出了高压水射流螺旋式切槽辅助松动爆破的新方法,实验研究了高压水射流切割煤岩体所形成缝槽的断口形貌并建立了其几何模型.在此基础上,基于断裂力学理论同时结合Westergaard方法,确定了复变函数,进而推导出爆生气体准静态作用下射流螺旋切槽孔的应力场公式,得到了射流螺旋切槽孔缝槽尖端应力强度因子计算公式,并分析了高压水射流切槽辅助松动爆破松动效应.最后,采用ANSYS/LS-DYNA数值模拟软件对该模型进行了验证,结果符合较好.

关键词: 水射流, 螺旋切槽, 松动爆破, 应力场, ANSYS/LS-DYNA

Abstract: A new technology of loosen blasting assisted by high-pressure water jet spiral-notch was put forward based on its unique advantages of water jet cutting, and the geometric model for water jet notched boreholes was established based on experiments. Furthermore, by employing fracture mechanics and Westergaard stress function method, the functions of complex variables was confirmed, and the stress field acted upon the spirally water jet notching borehole by quasi-static explosion gas was derived. The stress intensity factor of spiral-notch boreholes with high-pressure water jet was determined, and the loosening effect of loosen blasting assisted by high-pressure water jet spiral-notch was also analyzed. Finally, ANSYS/LS-DYNA was applied to verify the theoretical model, and the results of the numerical simulation are almost comparable to the model.

Key words: water jet, spiral notch, loosen blasting, stress field, ANSYS/LS-DYNA

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