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| Blasting vibration measurement and analyses of millisecond blasting model test for shaft |
| With two-circle blast holes in vertical shaft blasting as the prototype, three kinds of parallel millisecond blasting model tests with two-circle vertical blast holes were conducted to investigate the way to reducing the blasting vibration effect in vertical shaft blasting construction. The blasting vibration on the concrete model was monitored by blasting vibration intelligent monitor UBOX-5016. The actual blasting vibration indicated that blasting vibration effect was reduced significantly by millisecond blasting by reducing maximum charge per delay. When detonation delay was 25ms, two blasting vibration waves, segment I and segment Ⅱ overlaid each other and the actual peak blasting vibration velocity is smaller by interference effect of vibration reduction. When detonation delay was 50ms, two blasting vibration waves, segment I and segment Ⅲ were almost independent and the actual peak blasting vibration velocity was determined by maximum charge per delay. Spectrum analyses were implemented for vertical blasting vibration of three millisecond blasting model tests. The amplitude spectrum of millisecond blasting was much lower than simultaneous blasting and spectrum waveform of millisecond blasting was also more complex. The blasting vibration effect could be reduced remarkable by millisecond blasting which presented a higher blasting vibration frequency. |
| Research Center of Mine Underground Engineering, Ministry of Education, Anhui University of Science and Technology, Huainan 232001, China |
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Abstract With two-circle blast holes in vertical shaft blasting as the prototype, three kinds of parallel millisecond blasting model tests with two-circle vertical blast holes were conducted to investigate the way to reducing the blasting vibration effect in vertical shaft blasting construction. The blasting vibration on the concrete model was monitored by blasting vibration intelligent monitor UBOX-5016. The actual blasting vibration indicated that blasting vibration effect was reduced significantly by millisecond blasting by reducing maximum charge per delay. When detonation delay was 25ms, two blasting vibration waves, segment I and segment Ⅱ overlaid each other and the actual peak blasting vibration velocity is smaller by interference effect of vibration reduction. When detonation delay was 50ms, two blasting vibration waves, segment I and segment Ⅲ were almost independent and the actual peak blasting vibration velocity was determined by maximum charge per delay. Spectrum analyses were implemented for vertical blasting vibration of three millisecond blasting model tests. The amplitude spectrum of millisecond blasting was much lower than simultaneous blasting and spectrum waveform of millisecond blasting was also more complex. The blasting vibration effect could be reduced remarkable by millisecond blasting which presented a higher blasting vibration frequency.
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Received: 21 October 2013
Published: 25 March 2015
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[1] 赵明生,梁开水,李本伟. 段药量对爆破振动信号时频特性的影响研究[J]. 振动与冲击,2012,31(7)：85-88.
ZHAO Ming-sheng. LIANG Kai-shui, LI Ben-wei. Influence of deck charge on time-frequency characteristics of a blasting vibration signal[J]. Journal of Vibration and Shock, 2012, 31(7): 85-88.
[2] 赵明生,张建华,易长平. 基于小波分解的爆破振动信号RSPWVD二次型时频分析[J].振动与冲击,2011,30(2):44-47.
ZHAO Ming-sheng. ZHANG Jian-hua, YI Chang-ping. Blasting vibration signal RSPWVD quadratic time-frequency analysis based on wavelet decomposition[J]. Journal of Vibration and Shock, 2011, 30(2): 44-47.
[3] 凌同华，李夕兵. 单段爆破振动信号频带能量分布特征的小波包分析[J]. 振动与冲击,2007,26(5)：41-43.
LING Tong-hua, LI Xi-bing. Features on energy distribution of single deck blast vibration signals with wavelet packet analysis [J]. Journal of Vibration and Shock, 2007, 26(5): 41-43.
[4] 李夕兵，凌同华. 单段与多段微差爆破地震效应的反应谱特征分析[J]. 岩石力学与工程学报，2005，24(14)：2409-2413.
LI Xi-bing, LING Tong-hua. Response spectrum analysis of group vibration induced by single deck and multi-deck blasting[J]. Chinese Journal of Rock Mechanics and Engineering, 2005, 24(14): 2409-2413.
[5] 史秀志，陈寿如. 爆破振动时频特征的段药量及抵抗线效应[J]. 煤炭学报，2009，34(3)：345-349.
SHI Xiu-zhi, CHEN Shou-ru. Explosive blasted per delay and burden effects on time-frequency characteristic of vibration induced by blast[J]. Journal of China Coal Society, 2009, 34(3): 345-349.
[6] 谢承煜,罗周全,贾楠,等. 露天爆破振动对临近建筑的动力响应及降振措施研究[J].振动与冲击，2013，32(13)：187-193.
XIE Cheng-yu, LUO Zhou-quan, JIA Nan, et al. Dynamic effects of open blasting vibration on adjacent buildings and measures for vibration reduction[J]. Journal of Vibration and Shock, 2013, 32(13): 187-193.
[7] 张小康，潘长春. 不同装药量单孔爆破振动效应试验研究[J]. 中国矿业，2012，21(3)：96-99.
ZHANG Xiao-kang, PAN Chang-chun. Experimental study on single hole blasting vibration effect of different explosive charge[J]. China Mine Magazine, 2012, 21(3): 96-99.
[8] 马芹永,韩博，卢小雨. 立井井筒基岩段深孔爆破振动测试与分析[J]. 煤炭科学技术，2012，40(1)：23-25.
MA Qin-yong, HAN Bo, LU Xiao-yu. Measurement and analysis on deep borehole blasting vibration in base rock section of mine shaft[J]. Coal Science and Technology, 2012, 40(1): 23-25.
[9] 马芹永. 冻土爆破性与可钻性试验及其应用[M]. 北京：科学出版社，2007.
[10] 韩博,马芹永. 煤矿岩巷毫秒延期爆破振动测试与控制技术研究[J]. 煤炭学报，2013，38(2)：209-214.
HAN Bo, MA Qin-yong. Research on testing and controlling techniques of millisecond delay blasting vibration in coal mine rock roadway[J]. Journal of China Coal Society, 2013, 38(2): 209-214.
[11] 单仁亮,马军平,赵华. 分层分段直眼掏槽在石灰岩井筒爆破中的应用研究[J]. 岩石力学与工程学报,2003,22(4): 636- 640.
SHAN Ren-liang, MA Jun-ping, ZHAO Hua. Application of staged burn-cut in shaft blasting in limestone[J]. Chinese Journal of Rock Mechanics and Engineering, 2003, 22(4): 636-640.
[12] 韩博. 矿山井筒硬岩深孔爆破模型试验与应用研究[D]. 合肥：安徽理工大学，2013.
[13] 陈士海,燕永锋,戚桂峰,等. 微差爆破降震效果影响因素分析[J]. 岩土力学，2011，32(10): 3003-3008.
CHEN Shi-hai, YAN Yong-feng, QI Gui-feng, et al. Analysis of influence factors of interference vibration reduction of millisecond blasting[J]. Rock and Soil Mechanics, 2011, 32(10): 3003-3008.
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