Experiment on slotted tube blasting of axial decoupling coefficient charging
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摘要: 采用动态应变测试和高速摄影系统，对切缝管空气间隔装药定向断裂爆破机理进行研究。共采用4种装药结构，研究发现：当轴向不耦合系数为1.5时，炮孔两侧测点的应变比最大为2.1，压力持续作用时间达到9 μs，定向断裂效果显著。通过高速摄影测试发现裂纹的扩展速度并不是一个常量，扩展速度呈现震荡变化，并对其形成机理进行分析。在模型实验的基础上，分别采用不耦合装药系数1.5和1.66，进行地下隧道和露天边坡工程爆破现场实验，取得了良好的效果。Abstract: In this work we performed experimental tests using the dynamic strain test and high speed photography system to study the mechanism of the air-deck slotted charging structure blasting, with four axial air-deck structures adopted. The results show that the highest strain ratio reached 2.1 as the axial decoupling coefficient 1.5, and the corresponding function time of pressure was 9 μs. The best result of directional fracture was achieved. The crack propagation process was recorded by high-speed photography, which show that the propagation speed of the crack was not a constant. The expansion speed of the crack fluctuated with time, and illustrated the phenomenon. Finally, the field tests were performed in the underground tunneling and open slope projects with 1.50 and 1.66 as the axial decoupling coefficient respectively, and with good results achieved.
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图 2 不同轴向不耦合系数下应变时程曲线
Figure 2. Histories of strain with different axial decoupling coefficients
图 4 平均持续作用时间随随轴向不耦合系数关系
Figure 4. Average duration time vs. axial decoupling coefficient
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[1] Fourney W L, Dally J W, Hollowouy D C. Controlled blasting with ligamented charge holders[J]. International Journal of Rock Mechanics & Mining, 1978, 15(3):184-188. http://www.sciencedirect.com/science/article/pii/0148906278900062 [2] 杨仁树, 王雁冰.切缝药包不耦合装药爆破爆生裂纹动态断裂效应的试验研究[J].岩石力学与工程学报, 2013, 32(7):1337-1343. doi: 10.3969/j.issn.1000-6915.2013.07.007Yang Renshu, Wang Yanbing. Experimental study of dynamic fracture effect of blasting crack in slotted cartridge decoupling charge blasting[J]. Chinese Journal of Rock Mechanics and Engineering, 2013, 32(7):1337-1343. doi: 10.3969/j.issn.1000-6915.2013.07.007 [3] 杨仁树, 王雁冰, 岳中文, 等.定向断裂双孔爆破裂纹扩展的动态行为[J].爆炸与冲击, 2013, 33(6):631-637. doi: 10.3969/j.issn.1001-1455.2013.06.012Yang Renshu, Wang Yanbing, Yue Zhongwen, et al. Dynamic behaviors of crack propagation on directional facture blasting with two hole[J]. Explosion and Shock Wave, 2013, 33(6):631-637. doi: 10.3969/j.issn.1001-1455.2013.06.012 [4] 杨仁树, 岳中文, 肖同社, 等.节理介质断裂控制爆破裂纹扩展的动焦散试验研究[J].岩石力学与工程学报, 2008, 27(2):244-250. doi: 10.3321/j.issn:1000-6915.2008.02.003Yang Renshu, Yue Zhongwen, Xiao Tongshe, et al. 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. doi: 10.3321/j.issn:1000-6915.2008.02.003 [5] 姜琳琳.切缝药包定向断裂爆破机理与应用研究[D].北京: 中国矿业大学(北京), 2011. http://cdmd.cnki.com.cn/Article/CDMD-11413-2010240570.htm [6] 高祥涛.切缝药包爆轰冲击动力学行为研究[D].北京: 中国矿业大学(北京), 2013. http://cdmd.cnki.com.cn/Article/CDMD-11413-1013293565.htm [7] 刘永胜, 傅洪贤, 王梦恕, 等.水耦合定向断裂装药结构试验及机理分析[J].北京交通大学学报, 2009, 33(1):109-112. doi: 10.3969/j.issn.1673-0291.2009.01.025Liu Yongsheng, Fu Hongxian, Wang Mengshu, et al. Experimental research and analysis of mechanics on water-coupling directional fractural charge[J]. Journal of Beijing Jiaotong University, 2009, 33(1):109-112. doi: 10.3969/j.issn.1673-0291.2009.01.025 [8] 蒲传金, 郭学彬, 张志呈, 等.切缝药包爆破机理分析与试验研究[J].爆破, 2006, 23(1):33-35. doi: 10.3963/j.issn.1001-487X.2006.01.008Pu Chuanjin, Guo Xuebin, Zhang Zhicheng, et al. Mechanism analysis of cutting seam cartridge blasting[J].Blasting, 2006, 23(1):33-35. doi: 10.3963/j.issn.1001-487X.2006.01.008 [9] 肖正学, 陆忞, 陆渝生, 等.切缝宽度对药包爆炸效应影响的动光弹试验[J].解放军理工大学学报(自然科学版), 2006, 7(4):371-375. http://d.old.wanfangdata.com.cn/Periodical/jfjlgdxxb200604014Xiao Zhengxue, Lu Min, Lu Yusheng, et al. Dynamic photoelasticity experimental study on influence of slit's width on slit charge's blast effect[J]. Journal of PLA University of Science and Technology (Nature Science Edition), 2006, 7(4):371-375. http://d.old.wanfangdata.com.cn/Periodical/jfjlgdxxb200604014 [10] 张志雄, 郭银领, 李林峰.切缝药包爆破裂纹扩展机理研究[J].工程爆破, 2007, 13(2):11-14. doi: 10.3969/j.issn.1006-7051.2007.02.003Zhang Zhixiong, Guo Yinling, Li Linfeng. Study on mechanism of crack growth of cutting seam cartridge blasting[J]. Engineering Blasting, 2007, 13(2):11-14. doi: 10.3969/j.issn.1006-7051.2007.02.003 [11] 宗琦, 陆鹏举, 罗强.光面爆破空气垫层装药轴向不耦合系数理论研究[J].岩石力学与工程学报, 2005, 24(6):1047-1051. doi: 10.3321/j.issn:1000-6915.2005.06.026Zong Qi, Lu Pengju, Luo Qiang. Theoretical study on axial decoupling coefficients of smooth blasting with air cushion charging construction[J]. Chinese Journal of Rock Mechanics and Engineering, 2005, 24(6):1047-1051. doi: 10.3321/j.issn:1000-6915.2005.06.026 [12] 李遥, 吴亮, 钟冬望.空气间隔装药混凝土爆破试验块度分析[J].爆破, 2014, 31(1):10-15. http://d.old.wanfangdata.com.cn/Periodical/bp201401003Li Yao, Wu Liang, Zhong Dongwang. Lumpiness distribution analysis of concrete blasting test with air-decking charge[J]. Blasting, 2014, 31(1);10-15. http://d.old.wanfangdata.com.cn/Periodical/bp201401003 -
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