微差爆破中起爆顺序对爆破振动的影响分析
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摘要
为了研究不同起爆顺序对爆破振动的影响,通过设置不同测点对大量的微差爆破进行了振动监测。监测数据回归及小波包分析发现:不同的起爆顺序下,爆破抛掷方向不同,爆破抛掷反方向的振动强度最大。不同方向上的爆破地震波主频大小以及振动信号的频带能量分布均具有规律性;爆破抛掷反方向15Hz以内频带所占比例明显高于其他方向,反方向上产生的爆破地震波对周围结构危害相对较大。
The vibration monitoring was conducted by setting different measurement points for a series of millisecond blasting to study the blasting vibration under different initiation sequence.The corresponding data regression and wavelet packet analysis show that the maximum vibration intensity is along the reverse direction of blasting throwing,which changes with the blasting sequence.The blasting seismic wave frequency in the different directions and frequency band energy distribution of vibration signal have some regularity;The proportion of blasting vibration within 15Hz band in blasting throwing reverse direction is obviously higher than in the other directions,and the blasting seismic wave in throwing reverse direction has the larger harm on the surrounding structures.
The vibration monitoring was conducted by setting different measurement points for a series of millisecond blasting to study the blasting vibration under different initiation sequence.The corresponding data regression and wavelet packet analysis show that the maximum vibration intensity is along the reverse direction of blasting throwing,which changes with the blasting sequence.The blasting seismic wave frequency in the different directions and frequency band energy distribution of vibration signal have some regularity;The proportion of blasting vibration within 15Hz band in blasting throwing reverse direction is obviously higher than in the other directions,and the blasting seismic wave in throwing reverse direction has the larger harm on the surrounding structures.
引文
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[2]李德林,刘强,高振儒.建筑物附近大量石方爆破振动监测及控制[J].爆破器材,2009,38(4):30-33,35.Li Delin,Liu Qiang,Gao Zhenru.Ground vibration mo-nitoring and control of the mass rock blasting excavationnear building[J].Explosive Materials,2009,38(4):30-33,35.
[3]王广明,吴晓平,田小宝.露天矿台阶微差爆破改善爆破质量的探讨[J].露天采矿技术,2007(增刊):19-22.Wang Guangming,Wu Xiaoping,Tian Xiaobao.Exploreopencast mine stairs millisecond blasting to improve blas-ting quality[J].Opencast Mining Technology,2007(Supp.):19-22.
[4]卢志飞.起爆方式对微差爆破效果的影响[J].采矿技术,2004,4(2):92-94.Lu Zhifei.Effect of detonation manner to millisecondblasting[J].Mining Technology,2004,4(2):92-94.
[5]李洪涛,舒大强.爆破震动衰减规律的影响因素[J].武汉大学学报(工学版),2005,38(1):79-82.Li Hongtao,Shu Daqiang.Influential factors analysis ofblasting vibration attenuation law[J].Engineering Jour-nal of Wuhan University,2005,38(1):79-82.
[6]齐世福.军事爆破工程设计与应用[D].南京:中国人民解放军理工大学,2002.Qi Shifu.The military blasting engineering design and ap-plication[D].Nan Jing:PLA University of Science andTechnology,2002.
[7]凌同华,李夕兵.爆破振动信号不同频带的能量分布规律[J].中南大学学报(自然科学版),2004,35(2):310-315.Ling Tonghua,Li Xibing.Laws of energy distribution indifferent frequency bands for blast vibration signals[J].Journal Central South University(Nalural Scibncb),2004,35(2):310-315.
[8]凌同华,李夕兵.多段微差爆破振动信号频带能量分布特征的小波包分析[J].岩石力学与工程学报,2005,24(7):1116-1121.Ling Tonghua,Li Xibing.Analysis of energy distributionsof millisecond blast vibration signals using the waveletpacket method[J].Chinese Journal of Rock Mechanicsand Engineering,2005,24(7):1116-1121.
[9]龙源,娄建武,徐全军.小波分析在结构物对爆破振动响应的能量分析法中的应用[J].爆破器材,2001,30(3):1-5.Long Yuan,Lou Jianwu,Xv Quanjun.Application ofwavelet analysis to the energy method of the structure re-sponse caused by explosion vibration[J].Explosive Ma-terials,2001,30(3):1-5.
[10]叶海旺,房泽法,彭志刚,等.爆破地震对结构的影响[J].爆破,2000,17(1):86-91.Ye Haiwang,Fang Zefa,Peng Zhigang.Effects of blas-ting vibration on structures[J].Blasting,2000,17(1):86-91.
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