Meishan iron mine is a typical "urban mine", it’s of great significance to control the blasting vibration effect to insure the safety of buildings surrounding. In order to optimize the millisecond parameters and reduce blasting vibration effect, quasi two-dimensional fan-shape deep holes model was built by LS-DYNA. On the basis of the current typical millisecond blasting parameters, five different millisecond patterns were designed, the vibration velocity waveform of each hole in different patterns were identified, and the peaks were also compared. Results show that: the reasonable delay time of each hole should be 25ms~50ms to reduce the blasting vibration via stress wave interference; For multi-hole millisecond blasting, vibration reduction can’t be achieved just by uniformly changing delay time of each hole; According to the blasting parameters applied in Meishan iron mine, the detonator group 1-3-4-5-6-8-9-10-11# is most appropriate to control of blasting vibration effect. Besides, field contrast test was conducted,the results show that:comparing the vibration of original pattern, vibration caused by pattern 5 is 11.4% lower for underground and 15.2% lower for surface, indicating the optimized pattern has certain application value.
DENG Hong-wei, YANG Yi-quan, GAO Feng, ZHANG Jian.
Optimization of millisecond parameters on fan-shape deep holes hole by hole blasting based on LS-DYNA[J]. Journal of Vibration and Shock, 2017, 36(11): 140-146
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参考文献
[1] 崔正荣,张西良.梅山铁矿深孔爆破合理微差时间研究[J]. 现代矿业,2014,5(5):9-39.
Cui Zhen-rong,Zhang Xi-liang.Research on reasonable different time of deep hole blasting in Meishan iron mine[J].Modern Mining,2014,5(5):9-39.
[2] 史秀志,陈寿如.爆破振动信号时频特征的微差时间效应[J]. 湖南科技大学学报(自然科学版),2008,23(3):10-13.
Shi Xiu-zhi,Chen Shou-ru.Delay time interval effect for time-frequency characteristic of blasting vibration signal[J].Journal of Hunan University of Science & Technology(Natual Science Edition),2008,23(3):10-13.
[3] 叶海旺,石文杰,王二猛,等.金堆城露天矿生产爆破合理 微差时间的探讨[J].爆破,2010,27(1):96-98.
Ye Hai-wang,Shi Wen-jie,Wang Er-meng,et al.Research of reasonable delay intervals in Jinduicheng open-pit mine[J].Blasting,2010,27(1):96-98.
[4] 张大宁.大孤山铁矿微差爆破延期时间的优化研究[J].矿业 研究与开发,2010,30(4):88-89+100.
Zhang Da-ning.Delay time interval optimization of double holes millisecond blasting in Dagushan iron mine[J].Mining R&D,2010,30(4):88-89+100.
[5] 张袁娟,黄金香,农冬灵,等.某露天矿生产爆破合理微差 时间探讨[J].煤炭技术,2013,32(12):201-203.
Zhang Yuan-juan,Huang Jin-xiang,et al.Stusy on reasonable millsecond delay time in ope-pit mine[J].Coal Technology, 2013,32(12):201-203.
[6] 吴贤振,尹丽冰,刘建伟,等.基于LS-DYNA的临近采空 区多段爆破微差时间优化研究[J].爆破,2015,32(1):87-92.
Wu Xian-zhen,Yin Li-bing,Liu Jian-wei,et al.Optimization of blasting delay time near underground goaf based on LS-DYNA[J].Blasting,2015,32(1):87-92.
[7] 严加刚.扇形中深孔孔间微差爆破在西石门铁矿的应用 [J].矿业研究与开发,2003,23(5):53-54.
Yan Jia-gang.Application of fan middle deep-hole millisecond blasting in Xishimen iron mine[J].Mining R&D, 2003,23(5):53-54.
[8] 占时春,李山存.孔内孔间微差爆破试验研究[J].工程爆破, 2006,12(2):53-54.
Zhan Shi-chun,Li Shan-cun.Experimental study on millisecond blasing both in and among holes[J].Engineering Blasting,2006,12(2):53-54.
[9] 陈士海,燕永峰,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 Solid Mechanics,2011, 32(10):3003-3008.
[10] 张青成,王家磊,李德璇,等.露天矿山爆破振动影响因素 分析研究[J].辽宁工程技术大学学报(自然科学版),2013, 32(10):1334-1338.
Zhang Qing-cheng,Wang Jia-lei,Li De-xuan,et al.Grey correlation method in application of influence fators analysis of open-pit mine blasting vibration[J].Journal of Liaoning Technology University(Natural Science),2013, 32(10):1334-1338.
[11] 杨珊,陈建宏,郭宏斌,等.隧道爆破振动影响因素的灰色 关联分析[J].中国安全科学学报,2011,21(6):65-71.
Yang Shan,Chen Jian-hong,Guo Hong-bing,et al.Grey relation analysis of influence factors of tunnel blasting vibration[J].China Safety Science Journal,2011,21(6):65-71.
[12] 林大泽.降低地下矿深孔爆破落矿大块率的技术措施[J].中 国安全科学学报,2007,17(1):86-90.
Lin Da-ze.Technical measures on lowering boulder yield during deep-hole blasting in underground mine[J].China Safety Science Journal,2007,17(1):86-90.
[13] 郭学彬,张继春,刘泉,等.微差爆破的波形叠加分析[J]. 爆破,2006,23(2):4-8+49.
Guo Xue-bin,Zhang Ji-chun,Liu Quan,et al. Analysis of waveform superimposed action of millisecond blasting[J].Blasting,2006,23(2):4-8+49.