含铝炸药震源激发地震波能量的实验研究
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摘要
为提高地震波能量,通过改变震源装药组分,选用硝酸铵/TNT/铝粉(ATL)和聚黑/铝粉(JHL)2种含铝炸药及TNT等5种非含铝炸药,在相同地质条件下,采用远场测震和近场测压的方法,对地震波能量的激发效果进行了测试和评价.单炮记录结果对比发现,在保证不降低信噪比的条件下,含铝炸药产生的地震波品质优于非含铝炸药,且ATL优于JHL;地震波能量分析结果表明,与非含铝炸药相比,含铝炸药产生的地震波能量在不同时域内均有所提高,且ATL激发的地震波能量最高.炸药土中爆炸的近场压力测试结果表明,ATL炸药爆炸产生的应力波峰值压力比TNT(56.21kPa)提高了约78.76%.分析了炸药土中爆炸能量输出结构对地震波能量的影响.
In order to improve the seismic wave energy,the methods of far-field seismometry and near-field pressure measurement were applied to test and evaluate the stimulation effects of seismic wave generated by various components of explosion source,including the AN/TNT/AL(ATL) explosive and RDX/AL(JHL)explosive and other five explosives without aluminum powder,under the same geological condition.The single-shot records show that,while maintaining the same signal to noise ratio,the action effects generated by aluminium explosives are better than that by non-aluminium explosives,and ATLs are better than JHLs.Compared with non-aluminium explosives,seismic wave energy produced by aluminized explosives could be raised at different time region,and the energy produced by ATL gains the highest value.The test results of stress wave pressure in soil at near-field show that the stress wave peak pressure produced by ATL is 78.76% higher than that by TNT(56.21 kPa).In addition,the effects of the output structure of energy in soil on the seismic wave energy are also analyzed.
In order to improve the seismic wave energy,the methods of far-field seismometry and near-field pressure measurement were applied to test and evaluate the stimulation effects of seismic wave generated by various components of explosion source,including the AN/TNT/AL(ATL) explosive and RDX/AL(JHL)explosive and other five explosives without aluminum powder,under the same geological condition.The single-shot records show that,while maintaining the same signal to noise ratio,the action effects generated by aluminium explosives are better than that by non-aluminium explosives,and ATLs are better than JHLs.Compared with non-aluminium explosives,seismic wave energy produced by aluminized explosives could be raised at different time region,and the energy produced by ATL gains the highest value.The test results of stress wave pressure in soil at near-field show that the stress wave peak pressure produced by ATL is 78.76% higher than that by TNT(56.21 kPa).In addition,the effects of the output structure of energy in soil on the seismic wave energy are also analyzed.
引文
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[6]高峻,万应鹏,黄波.基于炸药激发子波特性选择激发井深[J].石油地球物理勘探,2009,44(增刊1):1-4.Gao Jun,Wan Yingpeng,Huang Bo.Choosing shootingdepth based on characteristics of explosive-activatedwavelet[J].Oil Geophysical Prospecting,2009,44(suppl 1):1-4.(in Chinese)
[7]张智,刘财,邵志刚.地震勘探中的炸药震源药量理论与实验分析[J].地球物理学进展,2003,18(4):724-728.Zhang Zhi,Liu Cai,Shao Zhigang.Theory and experi-mentation of the charge sizes in seismic source forseismic exploration[J].Progress in Geophysics,2003,18(4):724-728.(in Chinese)
[8]Ouchterlony F.Where does the explosive energy in rockblasting rounds go[J].Science and Technology of Ener-getic Materials,2004,65(2):54-62.
[9]张守中.爆炸与冲击动力学[M].北京:兵器工业出版社,1993.Zhang Shouzhong.Explosion and shock dynamics[M].Beijing:Ordance Industry Publishing House,1993.(inChinese)
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