探测城市断裂活动性的浅层地震方法技术
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摘要
用地震方法探测城市直下型活动断裂是一种不可替代的勘探技术,对于不同的探测深度需采用不同的排列长度。试验研究结果表明,小道间距接收不但有助于准确确定断裂的空间位置,而且也有助于确定基岩断裂上断点的埋深,即采用小道间距接收,有利于综合提高地震记录的纵横向分辨率。结合北京夏垫活断裂的浅层反射地震探测结果,讨论了采用浅层反射地震技术探测城市活断层应注意的一些问题。
The seismic method is an important exploration method for detecting active faults buried directly beneath major cities.Different array lengths must be adopted for different detecting depths.Test results show that small group interval receiving can help to determine accurately the space position of faults,determine the buried depth of the upper terminal points of active faults,and contribute to improving comprehensively vertical and horizontal resolution of seismic records.This paper discusses some problems concerning the detection of city active faults by using shallow seismic reflection on the basis of the results of shallow seismic reflection processing for Xiadian active fault in Beijing.
The seismic method is an important exploration method for detecting active faults buried directly beneath major cities.Different array lengths must be adopted for different detecting depths.Test results show that small group interval receiving can help to determine accurately the space position of faults,determine the buried depth of the upper terminal points of active faults,and contribute to improving comprehensively vertical and horizontal resolution of seismic records.This paper discusses some problems concerning the detection of city active faults by using shallow seismic reflection on the basis of the results of shallow seismic reflection processing for Xiadian active fault in Beijing.
引文
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[2]王庆海,徐明才.抗干扰高分辨率浅层地震勘探[M].北京:石油工业出版社,1991.
[3]徐明才,高景华,柴铭涛,等.地震方法在断层活动性评价中的应用研究[J].1998,地震学报,20(3)279.
[4]高景华,徐明才.地震反射方法探测城市活断层中的几个问题[J].地质与勘探,2004,40(增刊):91.
[5]徐明才,高景华,刘建勋,等.应用于城市活断层调查的地震方法技术[J].中国地震,2005,21(1):17.
[6]马文涛,唐文榜,徐锡伟,等.北京黄庄—高丽营隐伏断裂立水桥段浅部活动特征的地震探测[J].物探与化探,2005,29(6):503.
[7]徐锡伟,吴卫民,张先康,等.首都圈地区地壳最新构造变动与地震[M].北京:科学出版社,2002.
[8]Robert AW,Jack KO,Thomas LP,et al.Seismic surveys assessearthquake hazard in the NewMadrid area[J].The Leading Edge,1995,14:30.
[9]柴铬涛,高景华.城市活断层探测中的反射地震数据采集和处理技术[J].物探与化探,2007,31(4):365.
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