缺陷介质切槽爆破断裂行为的动焦散线实验

杨仁树 许鹏 杨立云 陈程

杨仁树, 许鹏, 杨立云, 陈程. 缺陷介质切槽爆破断裂行为的动焦散线实验[J]. 爆炸与冲击, 2016, 36(2): 145-152. doi: 10.11883/1001-1455(2016)02-0145-08
引用本文: 杨仁树, 许鹏, 杨立云, 陈程. 缺陷介质切槽爆破断裂行为的动焦散线实验[J]. 爆炸与冲击, 2016, 36(2): 145-152. doi: 10.11883/1001-1455(2016)02-0145-08
Yang Renshu, Xu Peng, Yang Liyun, Chen Cheng. Dynamic caustic experiment on fracture behaviors of flawed material induced by pre-notched blasting[J]. Explosion And Shock Waves, 2016, 36(2): 145-152. doi: 10.11883/1001-1455(2016)02-0145-08
Citation: Yang Renshu, Xu Peng, Yang Liyun, Chen Cheng. Dynamic caustic experiment on fracture behaviors of flawed material induced by pre-notched blasting[J]. Explosion And Shock Waves, 2016, 36(2): 145-152. doi: 10.11883/1001-1455(2016)02-0145-08

缺陷介质切槽爆破断裂行为的动焦散线实验

doi: 10.11883/1001-1455(2016)02-0145-08
基金项目: 

国家自然科学基金项目 51134025

高等学校学科创新引智计划项目 B14006

高等学校博士学科点专项科研基金项目 20120023120020

详细信息
    作者简介:

    杨仁树(1963—),男,博士,教授,博士生导师

    通讯作者:

    许鹏,pxcumtb@163.com

  • 中图分类号: O381;O346.1

Dynamic caustic experiment on fracture behaviors of flawed material induced by pre-notched blasting

  • 摘要: 利用数字激光动态焦散线实验系统,对含缺陷介质在切槽爆破和普通炮孔爆破中爆生裂纹的断裂行为进行对比研究。结果表明,切槽爆破中沿切槽方向起裂的主裂纹比非切槽方向早10 μs,有利于能量优先沿切槽方向释放;切槽方向主裂纹的起裂韧度为0.58 MN/m3/2,其裂纹扩展的平均速度为277 m/s,分别是普通爆破时主裂纹相应值的54%和86%;当切槽方向主裂纹与缺陷介质贯通后,为爆生气体提供了足够的膨胀空间,诱导爆生气体向预制裂纹两端释放,翼裂纹起裂以Ⅰ型拉伸破坏为主,并在裂纹扩展的60~250 μs内,Ⅰ型动态应力强度因子保持在0.6~0.8 MN/m3/2,形成了明显的平台,延缓了翼裂纹扩展速度的衰减,最终较普通炮孔翼裂纹扩展时间和扩展长度分别增加了22.7%和17.8%。
  • 图  1  焦散线成像示意图

    Figure  1.  Schematic diagram of caustics formation

    图  2  实验系统光路图

    Figure  2.  Optical system for new-type dynamic caustics system

    图  3  试件模型示意图

    Figure  3.  Schematic diagrams of specimen models

    图  4  普通炮孔动态焦散线系列图片

    Figure  4.  Series photos of dynamic caustics for ordinary blast hole

    图  5  切槽炮孔动态焦散线系列图片

    Figure  5.  Series photos of dynamic caustics for pre-notched blast hole

    图  6  试件破坏图样

    Figure  6.  Sketch of specimen after blasting

    图  7  主裂纹尖端动态应力强度因子时程曲线

    Figure  7.  Histories of dynamic stress intensity factor of blast-induced main crack

    图  8  主裂纹扩展速度时程曲线

    Figure  8.  Histories of crack propagation velocity of blast-induced main crack

    图  9  翼裂纹O-w1尖端动态应力强度因子时程曲线

    Figure  9.  Histories of dynamic stress intensity factor of blast-induced wing crack O-w1

    图  10  翼裂纹S-w1尖端动态应力强度因子时程曲线

    Figure  10.  Histories of dynamic stress intensity factor of blast-induced wing crack S-w1

    图  11  翼裂纹扩展速度、加速度时程曲线

    Figure  11.  Histories of crack propagation velocity and accelertation of blast-induced wing crack

  • [1] Fourney W L, Barker D B, Holloway D C. Model studies of explosive well stimulation techniques[J]. International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1981, 18(2):113-127. http://cn.bing.com/academic/profile?id=38ce77e37dd41797099ad3f3f5478266&encoded=0&v=paper_preview&mkt=zh-cn
    [2] Holloway D C, Bjarnholt G C, Wilson W H. A field study of fracture control techniques for smooth wall blasting[C]//The 27th US Symposium on Rock Mechanics. 1986.
    [3] Tsoutrelis C E, Gikas N, Nomikos P, et al. Use of notched boreholes for fracture controlled blasting in the ornamental stone quarries[J]. Fragblast, 1997, 1(4):445-463. doi: 10.1080/13855149709408408
    [4] 陈益蔚.切槽炮孔爆破参数的确定[J].金属矿山, 1991, 60(12):26-31. http://www.cnki.com.cn/Article/CJFDTOTAL-JSKS199112006.htm

    Chen Yiwei. A study of the notch parameters of a notched borehole[J]. Metal Mining, 1991, 60(12):26-31. http://www.cnki.com.cn/Article/CJFDTOTAL-JSKS199112006.htm
    [5] 张志呈.切槽爆破参数的研究与生产实践[J].岩土工程学报, 1996, 18(2):104-108. doi: 10.3321/j.issn:1000-4548.1996.02.016

    Zhang Zhicheng. A research study of notched blasting parameters and its industrial application[J]. Chinese Journal of Geotechnical Engineering, 1996, 18(2):104-108. doi: 10.3321/j.issn:1000-4548.1996.02.016
    [6] 杜云贵, 张志呈, 李通林.切槽爆破中V形切槽产生的力学效应研究[J].爆炸与冲击, 1991, 11(1):26-30. http://www.bzycj.cn/article/id/10763

    Du Yungui, Zhang Zhicheng, Li Tonglin. Study on the mechanical effects produced by the V-shaped notch borehole blasting[J]. Explosion and Shock Waves, 1991, 11(1):26-30. http://www.bzycj.cn/article/id/10763
    [7] 张玥.V形刻槽爆破机理动态数值模拟分析[J].爆破器材, 2009, 38(4):1-5. doi: 10.3969/j.issn.1001-8352.2009.04.001

    Zhang Yue. Dynamic numerical simulation for the mechanism of V-shaped notch blasting[J]. Explosive Materials, 2009, 38(4):1-5. doi: 10.3969/j.issn.1001-8352.2009.04.001
    [8] 李清, 王平虎, 杨仁树, 等.切槽孔爆破动态力学特征的动焦散线实验[J].爆炸与冲击, 2009, 29(4):413-418. doi: 10.3321/j.issn:1001-1455.2009.04.014

    Li Qing, Wang Pinghu, Yang Renshu, et al. Experimental investigation on dynamic mechanical behaviors of cracks induced by V-notch borehole blasting with dynamic caustics[J]. Explosion and Shock Waves, 2009, 29(4):413-418. doi: 10.3321/j.issn:1001-1455.2009.04.014
    [9] 杨仁树, 岳中文, 肖同社.节理介质断裂控制爆破裂纹扩展的动焦散试验研究[J].中国矿业大学报, 2008, 27(2):244-250. http://d.old.wanfangdata.com.cn/Periodical/yslxygcxb200802003

    Yang Renshu, Yue Zhongwen, Xiao Tongshe. Dynamic caustics experiment on crack propagation of jointed medium fracture with controlled blasting[J]. Chinese Journal of Rock Mechanics and Engineering, 2008, 27(2):244-250. http://d.old.wanfangdata.com.cn/Periodical/yslxygcxb200802003
    [10] 徐颖, 沈兆武, 孟益平.爆炸载荷作用下刻槽炮孔动态裂纹扩展规律[J].中国科学技术大学学报, 2003, 33(2):61-67. http://d.old.wanfangdata.com.cn/Periodical/zgkxjsdxxb200302009

    Xu Ying, Shen Zhaowu, Meng Yiping. Investigation on dynamic expanding rule and application in notch blasting[J]. Journal of University of Science and Technology of China, 2003, 33(2):61-67. http://d.old.wanfangdata.com.cn/Periodical/zgkxjsdxxb200302009
    [11] Kalthoff J F. Shadow optical method of caustics[C]//Proceedings of the International Symposium on Photoelasticity. Tokyo, 1986: 109-120.
    [12] 杨立云, 杨仁树, 许鹏.新型数字激光动态焦散线实验系统及其应用[J].中国矿业大学学报.2013, 42(2):188-194. http://d.old.wanfangdata.com.cn/Periodical/zgkydxxb201302005

    Yang Liyun, Yang Renshu, Xu Peng. Caustics method combined with laser & digital high-speed camera and its applications[J]. Journal of China University of Mining & Technology, 2013, 42(2):188-194. http://d.old.wanfangdata.com.cn/Periodical/zgkydxxb201302005
    [13] Kutter H K, Fairhurst C. On the fracture process in blasting[J]. International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1971, 8(3):181-202. http://d.old.wanfangdata.com.cn/Periodical/dxkj201706027
    [14] Rossmanith H P, Daehnke A, Nasmillner R E K, et al. Fracture mechanics applications to drilling and blasting[J]. Fatigue & Fracture of Engineering Materials & Structures, 1997, 20(11):1617-1636. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=cb9ff6b3dd6dbae4a7abae25ba592a21
  • 加载中
图(11)
计量
  • 文章访问数:  6099
  • HTML全文浏览量:  2280
  • PDF下载量:  886
  • 被引次数: 0
出版历程
  • 收稿日期:  2014-08-13
  • 修回日期:  2014-10-08
  • 刊出日期:  2016-03-25

目录

    /

    返回文章
    返回