苏波;高可帅;宋瑞富;
SU Bo,GAO Ke-shuai,SONG Rui-fu (The Bureau of Tsingtao Coast Defence Engineering,Qingdao 266031,Shandong,China)

• 1:青岛海防工程局

摘要(Abstract)：

首先进行了单孔爆破地震波数值模拟,其波形变化规律与相关研究相吻合。在此基础上进行了两孔延时间隔为0～25ms的爆破振动波形叠加作用的数值模拟,并讨论了两种不同延时间隔理论的可行性和实用性。研究表明,即使延时间隔不足1/5倍主震周期,毫秒延时爆破的振速也低于齐发爆破的振速;当延时间隔约为1/2倍主震周期时,存在部分测点振速低于单孔爆破振速的现象,但由于爆破振动周期不规则变化,其降振的可靠性不高;当延时间隔大于地震波持续时间时,可避免前后地震波主震段叠加,从而将多孔毫秒延时爆破振速降低至单孔爆破的振速。
First of all,the single-hole blasting seismic wave was analyzed by numerical simulation method, the change law of its wave shape corresponded with the relative researches.Based on the single-hole blasting vibration analysis,milliseccnd blasting vibration wave-shape superposition effects were simulated with delay time intervals between 0 and 25 milliseconds,the feasibility and practicality of two different delay time interval theory were discussed.The results showed that vibration velocity caused by millisecond delay blasting was lower than that caused by simultaneous blasting,even though the delay time interval was less than 1/5 of main quake period,vibration velocities of partial measuring points caused by millisecond delay blasting were lower than those caused by single-hole blasting when the delay time interval was nearby 1/2 of main quake period,the reliability of decreasing vibration was not high because of the irregular vibration period;and the superposition of main quake segments was avoided when the delay time interval was longer than the duration of seismic wave so as to make vibration velocity caused by holes millisecond delay blasting reduce to the vibration velocity caused by the single-hole blasting.

关键词(KeyWords)： 延时爆破;延时间隔;爆破振动;波形叠加;数值模拟
Millisecond delay blasting;Delay time interval;Blasting vibration;Wave-shape superposition;Numerical simulation

Abstract:

Keywords:

基金项目(Foundation):

作者(Authors): 苏波;高可帅;宋瑞富;
SU Bo,GAO Ke-shuai,SONG Rui-fu (The Bureau of Tsingtao Coast Defence Engineering,Qingdao 266031,Shandong,China)

参考文献(References)：

• [1]张光雄,杨军,卢红卫.毫秒延时爆破干扰降振作用研究[J].工程爆破,2009,9(3):17-21.
• [2]郭学彬,张继春,刘泉,等.微差爆破的波形叠加作用分析[J].爆破,2006,6(2):4-8.
• [3]苏华友,陆文.微差爆破间隔时间合理性分析[J].四川冶金,2000,3:15-17.
• [4]齐世福,龙源.军事爆破工程与应用[M].南京:南京解放军理工大学工程兵工程学院,2002.
• [5]张伟新,娄建武,唐献述.石方爆破振动监测数据分析[J].爆破,2002,3(1):78-80.
• [6]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,2000,22(5):45-48,
• [7]蒋进军,Blair D P.地下爆源引起的地表震动[J].爆破,1993,10(3):1-7.
• [8]Hallquist J O.LS-DYNA Theoretical Manual[M]. Livermore Software Technology Corporation,1998.
• [9]王鹏,周传波,耿雪峰,等.多孔同段爆破漏斗形成机理的数值模拟研究[J].岩土力学,2010,03:993-997.
• [10]甄育才,朱传云.中远区毫秒延时爆破振动叠加效应影响因素分析I-J].爆破,2005,6(2):11-15.
• [11]王鸿渠.多边界石方爆破工程[M].北京:人民交通出版社,1994.