岩体软弱夹层对爆破震动信号影响的试验研究
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摘要
岩体中的软弱夹层对爆破震动信号有明显的影响。在南宁市郊区一采石场进行了软弱夹层影响爆破震动信号的试验,在试验中采用了无线网络控制的爆破震动信号测量系统,并针对以前试验中的不足,改变了药包起爆顺序,试验结果表明:在软弱夹层上方爆破的震动信号时域曲线比较规整简单,频域曲线主峰非常突出明显且高频部分很少;在软弱夹层处及其下方爆破的震动信号时域曲线相对软弱层上方要复杂得多,频域曲线叠加了较多的高频成分,曲线中呈现多峰特性。依据试验结果提出了采用爆破震动信号识别软弱夹层的近似简便方法,并对该法的原理和适用性进行了分析。
Soft interlayer has an obvious impact on blasting vibration signal.A test showing soft interlayer's impact on blasting vibration signals was done in a quarry of Nanning suburb.In the test,a blasting vibration signal measurement system controlled by a wireless network was used.Aiming at the shortcomings of previous tests,the ignition order of dynamites was changed.The test results showed that when blasting area is above soft interlayer,the time domain curves of vibration signals are very simple,the peaks of their frequency domain curves are very obvious and high frequency components are few;when blasting area is in or below soft interlayer,the time domain curves of vibration signals are more complex than those in the former case,more high frequency components appear in the frequency domain curves with multi-peak characteristics.Based on the test results,an approximate and simple method adopting blasting vibration signals to identify soft interlayer was proposed,its principle and applicability were analyzed.
Soft interlayer has an obvious impact on blasting vibration signal.A test showing soft interlayer's impact on blasting vibration signals was done in a quarry of Nanning suburb.In the test,a blasting vibration signal measurement system controlled by a wireless network was used.Aiming at the shortcomings of previous tests,the ignition order of dynamites was changed.The test results showed that when blasting area is above soft interlayer,the time domain curves of vibration signals are very simple,the peaks of their frequency domain curves are very obvious and high frequency components are few;when blasting area is in or below soft interlayer,the time domain curves of vibration signals are more complex than those in the former case,more high frequency components appear in the frequency domain curves with multi-peak characteristics.Based on the test results,an approximate and simple method adopting blasting vibration signals to identify soft interlayer was proposed,its principle and applicability were analyzed.
引文
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[14]李国军,孙灵芬,廖鸿龙,等.正交偶极声波测井在鄂尔多斯盆地变质岩储层中的应用[J].测井技术,2007,31(4):357-359.
[15]胡红,罗宁,李联新.阵列声波资料在测井解释中的应用[J].岩性油气藏,2008,20(2):97-101.
[16]席道英,黄理兴.岩芯声学特性与原位测井参数对比研究[J].岩土力学,1995,16(2):52-56.
[2]刘一伟,张继春,郭学彬,等.软弱夹层强度参数的室内模拟[J].西南科技大学学报(自然科学版),2007,22(1):30-34.
[3]范留明,闫娜,李宁.薄弹性软弱夹层的动力响应模型[J].岩石力学与工程学报,2006,25(1):88-92.
[4]Ding H.Study on blasting vibration[A].proceedings of the7th international symposium on rock fragmentation by blasting[C].Beijing:[s.n.],2002,11-15.
[5]Ding H,Zheng Z M.Source model for blasting vibration andtentative application to engineering geophysics[A].Proceedings of the 9th International Congress on Sound andVibration[C].Florida:Orlando,2002:8-11.
[6]Ding H,Zheng Z M.Source model of blasting vibration[J].Science in China,Series E,2002,45(4):395-407.
[7]钟明寿,龙源,谢全民,等.基于分形盒维数和多重分形的爆破地震波信号分析[J].振动与冲击,2010,29(1):7-11.
[8]白金泽,丁桦,张均锋,等.爆破方法识别滑带实验研究[J].岩土力学,2006,27(1):102-105.
[9]龙丽平,伍彦峰,丁桦,等.运用爆破震动来识别地下裂隙和软弱夹层[J].北京航空航天大学学报,2005,31(6):682-685.
[10]Yan C B,Xu G Y,Zuo Y J.Destabilization analysis ofoverlapping underground chambers induced by blasting vib-ration with catastrophe theory[J].Transactions of NonferrousMetals Society of China,2006,16(3):735-740.
[11]周春华,龙源,晏俊伟,等.基于WTMM的爆破振动信号奇异性分析[J].振动与冲击,2007,26(1):108-111.
[12]许年春,石东虹,张秋.反射波初至时刻判断中的信号对比法[J].重庆交通大学学报(自然科学版),2007,26(6):123-126.
[13]王渝培.地震反射波法在隧道施工超前预报中的应用研究[J].西南大学学报(自然科学版),2008,30(9):170-173.
[14]李国军,孙灵芬,廖鸿龙,等.正交偶极声波测井在鄂尔多斯盆地变质岩储层中的应用[J].测井技术,2007,31(4):357-359.
[15]胡红,罗宁,李联新.阵列声波资料在测井解释中的应用[J].岩性油气藏,2008,20(2):97-101.
[16]席道英,黄理兴.岩芯声学特性与原位测井参数对比研究[J].岩土力学,1995,16(2):52-56.
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