薄覆盖层隐伏断裂的纵横波联合探测

doi:10.11720/wtyht.2021.1046

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摘要

在薄覆盖层区域应用浅层纵波方法进行断裂探测往往仅能获取基岩顶面的反射波,难以精确判断隐伏断裂的位置及埋深。本文首先应用浅层纵波反射获取断裂的大致位置及埋深;然后应用超浅层横波反射进行位置确认及浅部断裂信息的补充完善。通过联合探测实现了对断裂平面位置上更可靠的定位,获得了断裂从浅层到超浅层不同深度范围更为丰富的构造特征信息。在联合探测的基础上布设了钻孔联合剖面,验证了断裂的存在。研究表明薄覆盖区域隐伏断裂纵横波联合探测较单一方法效果更理想,可获取更多的断裂信息,可为钻孔联合剖面布设提供更可靠的依据。

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	夏暖
	鹿子林
	付俊东
	张建民
	王冬雷
	郑旭

关键词 ：薄覆盖层, 浅层纵波反射, 超浅层横波反射, 联合探测

Abstract：

In thin overburden area,the application of shallow P-wave reflection to fault detection can only obtain the reflected waves of the bedrock top surface,but it is difficult to accurately determine the location and buried depth of the fault.In this paper,the authors first applied shallow P-wave reflection method to obtain the approximate location and buried depth of the fault,then used ultra-shallow S-wave reflection method to confirm the location and supplement the shallow fault information.Through the joint detection, more reliable localization of the fault plane position was achieved,and more abundant structural feature information of faults ranging from shallow to ultra-shallow depths was obtained.On the basis of joint detection,the drilling exploration composite geological section was arranged to verify the existence of the fault.The results show that the P-wave and S-wave joint detection of buried faults in thin overburden area is more effective than a single method.It can obtain more fault information and can provide a more reliable basis for the layout of drill exploration composite geological section.

Key words： thin overburden area shallow P-wave reflection ultra-shallow S-wave reflection joint detection

收稿日期: 2020-02-08 修回日期: 2020-11-12 出版日期: 2021-04-20

ZTFLH:

P631.4

基金资助:连云港市活动断层探测与地震危险性评价项目;山东省地震局科研项目(YB1906)

作者简介: 夏暖(1985-),男,工程师,硕士,毕业于中国矿业大学(徐州),主要从事浅层地震勘探工作。Email: 282713966@qq.com

引用本文:

夏暖, 鹿子林, 付俊东, 张建民, 王冬雷, 郑旭. 薄覆盖层隐伏断裂的纵横波联合探测[J]. 物探与化探, 2021, 45(2): 387-393.
XIA Nuan, LU Zi-Lin, FU Jun-Dong, ZHANG Jian-Min, WANG Dong-Lei, ZHENG Xu. Joint detection of buried faults in thin overburden area by P-wave and S-wave. Geophysical and Geochemical Exploration, 2021, 45(2): 387-393.

链接本文:

https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2021.1046 或 https://www.wutanyuhuatan.com/CN/Y2021/V45/I2/387

Fig.1 地质构造和地震测线位置

Table 1 施工参数

Fig.2 浅层纵波法(a)和超浅层横波反射法(b)典型单炮记录

Fig.3 滤波前(a)、后(b)单炮记录对比

Fig.4 静校正前(a)、后(b)单炮记录对比

Fig.5 纵波反射波法叠加时间剖面

Fig.6 超浅层横波反射波法叠加时间剖面

Fig.7 钻孔联合地质剖面

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