孔间不同毫秒延时对爆破振动影响的数值模拟
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摘要
合理的毫秒延时间隔可以有效地降低爆破振动,目前对精确延时毫秒间隔对爆破振动的影响还没有准确的研究成果。基于地震波传播过程中能量的变化和自由面的形成,给出了孔间毫秒延时时间的计算公式。并对不同毫秒延时间隔进行了数值模拟。结果表明:利用理论计算出的毫秒延时间隔时间的同时也要考虑自由面形成所需要的时间,从而达到理想的爆破效果。在模拟中所采用的爆破参数的情况下,孔间延时间隔为12 ms时利于降低爆破振动,同时满足自由面形成的时间,利于岩石的破碎。同时验证了计算公式的可行性。
The vibration can be reduced by reasonable millisecond delay interval,and there have not accurate results of precision millisecond delay time for blasting. Based on seismic wave propagation of energy in the process of change and free surface,the millisecond delay time formula was given. Numerical simulation of different millisecond delay time for blast-hole. The results show that using the theory to calculated the millisecond delay interval,at the same time,the formation of free surface time must be considered to achieve the desired blasting effect. Blasting parameters of the case used in the simulation for the blasting vibration can be reduced when the delay time is 12 ms,at the same time satisfies the free surface formation time,favorable for rock fragmentation. The results also show that the calculation formula is feasibility.
The vibration can be reduced by reasonable millisecond delay interval,and there have not accurate results of precision millisecond delay time for blasting. Based on seismic wave propagation of energy in the process of change and free surface,the millisecond delay time formula was given. Numerical simulation of different millisecond delay time for blast-hole. The results show that using the theory to calculated the millisecond delay interval,at the same time,the formation of free surface time must be considered to achieve the desired blasting effect. Blasting parameters of the case used in the simulation for the blasting vibration can be reduced when the delay time is 12 ms,at the same time satisfies the free surface formation time,favorable for rock fragmentation. The results also show that the calculation formula is feasibility.
引文
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[12]Siskind E D.Frequency analysis and use of response spectra for blast vibration assessments in mining[A].Proceedings of the 22nd Annual Conference on Explosives and Blasting Technique[C].New Jersey,1996:176-183.
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[14]Jose A,Sanchidria N,Pablo Segarra,et al.Energy components in rock blasting[J].International Journal of Rock Mechanics&Mining Sciences,2007,44:130-147.
[15]Rinehart J S.Stress transients in solids[M].Santa Fe,New Mexico:Hyperdynamics,1975.
[16]李洪涛.基于能量原理的爆破地震效应研究[D].武汉:武汉大学,2007.
[17]李文彬,王晓鸣,赵国志,等.高分辨率地震勘探的垂向叠加震源研究[J].南京理工大学学报,2002,26(1):44-47.Li Wenbin,Wang Xiaoming,Zhao Guozhi,et al.Study of superimposed seismic source in vertical direction on high distinguish ability exploration[J].Journal of Nanjing University of Science and Technology,2002,26(1):44-47.
[18]Roberts D K,Wells A A.Velocity of brittle fracture[J].Engineering,1954,8(17):220-224.
[19]刘优平,龚敏,黄刚海.深孔爆破装药结构优选数值分析方法及其应用[J].岩土力学,2012,33(6):1883-1889.Liu Youping,Gong Min,Huang Ganghai.Numerical analysis method for optimizing charging structure of deep-hole blasting and its application[J].Rock and Soil Mechanical,2012,33(6):1883-1889.
[2]王军跃.爆破振动信号叠加法及其在露天矿的应用[D].武汉:武汉理工大学,2007.Wang Junyue.Superposition method of blasting vibration and its application in open-pit mine[D].Wuhan:Wuhan University of Technology,2007.
[3]凌同华,李夕兵,戴塔根,等.基于小波变换的时-能密度法优选微差延期时间[J].重庆建筑大学学报,2006,28(2):36-39.Ling Tonghua,Li Xibing,Dai Tagen et al.Optimizing delay time interval by the means of time-energy analysis based on wavelet transform[J].Journal of Chongqing Jianzhu University,2006,28(2):36-39.
[4]罗开军.孔内孔间微差爆破间隔时间的合理选择[J].金属矿山,2006(4):4-6.Luo Kaijun.Rational selection of delay time in in-hole and betweenholes microsecond blasting[J].Metal Mine,2006(4):4-6.
[5]许红涛,卢文波,陈明,等.雷管延期误差引起爆破振动叠加问题的遗传算法研究[J].岩土力学,2008,29(7):1900-1904.Xu Hongtao,Lu Wenbo,Chen Ming,et al.Study on superposition effect of blasting vibration induced by delay error of detonators using genetic algorithm[J].Rock and Soil Mechanics,2008,29(7):1900-1904.
[6]赵明生,张建华,易长平.基于单段波形叠加的爆破振动信号时频分析[J].煤炭学报,2010,35(8):1279-1282.Zhao Mingsheng,Zhang Jianhua,Yi Changping.Time-frequency analysis based on single-stage addition of waveforms of blasting vibration signals[J].Journal of China Coal Society,2010,35(8):1279-1282.
[7]杨年华,张乐.爆破振动波叠加数值预测方法[J].爆炸与冲击,2012,32(1):84-90.Yang Nianhua,Zhang Le.Blasting vibration waveform prediction method based on superposition principle[J].Explosion and Shock Waves,2012,32(1):84-90.
[8]Norman Paley,Teck Alaska.Testing electronic detonators to increase sag mill throughput at the red dog mine[A].37th Annual Conference on Explosives and Blasting Technique[C].San Diego,2010:302-315.
[9]Achenbach J D.Wave propagation in elastic solids[M].Amsterdam:Elsevier,1975.
[10]Lewis N,Pereira P.Operating improvements at Vulcan Materials McCook quarry using electronic detonators[A].Proceedings of the29th Annual Conference on Explosives and Blasting Technique[C].Nashville,2003:1-14.
[11]McKinstry R,Floyd J,Bartley D.Electronic detonator performance evaluation[A].Proceedings of the 28th Annual Conference on Explosives and Blasting Technique[C].Las Vegas,2002:1-20.
[12]Siskind E D.Frequency analysis and use of response spectra for blast vibration assessments in mining[A].Proceedings of the 22nd Annual Conference on Explosives and Blasting Technique[C].New Jersey,1996:176-183.
[13]Manoj Khandelwal,Singh T N.Prediction of blast-induced ground vibration using artificial network[J].International Journal of Rock Mechanics and Mining Sciences,2009,46(7):1214-1222.
[14]Jose A,Sanchidria N,Pablo Segarra,et al.Energy components in rock blasting[J].International Journal of Rock Mechanics&Mining Sciences,2007,44:130-147.
[15]Rinehart J S.Stress transients in solids[M].Santa Fe,New Mexico:Hyperdynamics,1975.
[16]李洪涛.基于能量原理的爆破地震效应研究[D].武汉:武汉大学,2007.
[17]李文彬,王晓鸣,赵国志,等.高分辨率地震勘探的垂向叠加震源研究[J].南京理工大学学报,2002,26(1):44-47.Li Wenbin,Wang Xiaoming,Zhao Guozhi,et al.Study of superimposed seismic source in vertical direction on high distinguish ability exploration[J].Journal of Nanjing University of Science and Technology,2002,26(1):44-47.
[18]Roberts D K,Wells A A.Velocity of brittle fracture[J].Engineering,1954,8(17):220-224.
[19]刘优平,龚敏,黄刚海.深孔爆破装药结构优选数值分析方法及其应用[J].岩土力学,2012,33(6):1883-1889.Liu Youping,Gong Min,Huang Ganghai.Numerical analysis method for optimizing charging structure of deep-hole blasting and its application[J].Rock and Soil Mechanical,2012,33(6):1883-1889.
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