微差爆破的波形叠加作用分析
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摘要
在分析纵波、横波和面波传播速度差异的基础上,进行均质介质中的单孔爆破振动测试,研究爆破地震波时程曲线上纵波、横波和面波因初至时刻随传播距离的增加而不同所具有的分离特性;再进行深孔台阶微差爆破振动效应试验,分析微差爆破地震波的段间叠加特性。结果表明,微差爆破相邻段别的地震波形随传播距离的增加而相互接近、叠加,从而提出确定微差爆破合理间隔时间应考虑距离因素的观点。
Based on analyzing the difference of propagation speeds among P-waves,S-waves and surface waves,the vibration of single-hole blasting in homogeneous medium was measured.The separated properties of P-waves,S-waves and surface waves because of the increase of the propagation distance which their initial arriving moments are different from one another on the time history curves of blasting seismic waves were studied.Through the experiments of the vibration effect of deep-hole bench blasting with millisecond delay,the stacking properties among the delay intervals of millisecond blasting were analyzed.The results show that seismic waves adjacent to the delay intervals in millisecond blasting are close to each other and stack with the increase of propagation distance,thereby,the viewpoint that the distance factor should be take into account to determine the reasonable interval time of millisecond blasting was put forward.
Based on analyzing the difference of propagation speeds among P-waves,S-waves and surface waves,the vibration of single-hole blasting in homogeneous medium was measured.The separated properties of P-waves,S-waves and surface waves because of the increase of the propagation distance which their initial arriving moments are different from one another on the time history curves of blasting seismic waves were studied.Through the experiments of the vibration effect of deep-hole bench blasting with millisecond delay,the stacking properties among the delay intervals of millisecond blasting were analyzed.The results show that seismic waves adjacent to the delay intervals in millisecond blasting are close to each other and stack with the increase of propagation distance,thereby,the viewpoint that the distance factor should be take into account to determine the reasonable interval time of millisecond blasting was put forward.
引文
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[3]张世雄,胡建华,阳生权,等.地下工程爆破振动监测与分析[J].爆破,2001,18(2):49~52.Zhang Sh ixiong,Hu Jianhua,Yang Shengquan,et al.Mo-n itoring and Analysis of B last V ibration in UndergroundEngineering[J].B lasting,2001,18(2):49~52.
[4]李彬峰.爆破地震效应及其控制措施分析[J].爆破,2003,20(2):83~85.L i B infeng.Analysis of ControllingM easurem ent and B las-ting V ibration E ffect[J].B lasting,2003,20(2):83~85.
[5]张成良,梁开水,唐海.预裂爆破减振作用效果分析[J].爆破,2003,20(2):17~19.Zhang Chengliang,L iang Kaishu i,Tang Hai.Analysis ofE ffect of Shock-absorption in Presp lit B lasting[J].B las-ting,2003,20(2):17~19.
[6]王文龙.钻眼爆破[M].北京:煤炭工业出版社,1984.W ang W en long.D rilling B lasting[M].Be ijing:Coal In-dustry Pub lish ing Company,1984.
[7]孟吉复,惠鸿斌.爆破测试技术[M].北京:冶金工业出版社,1992.M eng Jifu,Hu i Hongb in.M easuring Techn ique for B las-ting[M].Be ijing:M etallurgy Industry Pub lish ing Compa-ny,1992.
[8]甄育才,朱传云.中远区微差爆破振动叠加效应影响因素分析[J].爆破,2005,22(2):11~15.Zhen Yucai,Zhu Chuanyun.Analysis on Influential Fac-tors of V ibration Superposition in M idd le and Far F ield ofM illisecond B lasting[J].B lasting,2005,22(2):11~15.
[9]徐全军,龙源,张庆明,等.微差爆破震动叠加起始位置数值模拟[J].力学与实践,2000,(5):45~48.Xu Quan jun,Long Yuan,Zhang Q ingm ing,et al.Num eri-cal S imu lation of the Starting Position of G round V ibra-tion in Short Delay B lasting[J].M echan ics and Prac-tice,2000,(5):45~48.
[10]马建军,程良奎,蔡路军.爆破应力波的传播及其远区破坏效应研究现状述评[J].爆破,2005,22(2):17~21.M a Jian jun,Cheng L iangku i,Cai Lu jun.Present S ituationof Research on Propagation of B lasting Stress W ave andRock Fragm entation E ffect in Remote Area[J].B las-ting,2005,22(2):17~21.
[11]Guo Xueb in,W ang Chengduan,X iao Zhengxue.ShockFeatures and Protection in the B lastof Foundation D is-m antling[A].Progrss in Safety Sc ience and Technology(VolⅡParta)[C].2000.406~412.
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