| 地震CT及其在采空区探测中的应用 |
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| 引用本文： | 王超凡,赵永贵,靳洪晓,郭鸿,李勤.地震CT及其在采空区探测中的应用[J].地球物理学报,1998,41(Z1):367-375. |
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| 作者姓名： | 王超凡 赵永贵 靳洪晓 郭鸿 李勤 |
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| 作者单位： | 1. 中国航空工业勘察设计研究院, 北京 100086;
2. 中国科学院地质研究所, 北京 100029 |
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| 摘 要： | 应用地震波速CT和吸收CT相结合的方法对山东省招远市界河金矿隐伏采空区进行了联合探测研究．波速CT是利用地震波走时资料反演地质体内部波速结构；吸收CT是通过能量变化观测反演吸收系数分布．地震波速对岩性敏感，吸收系数与岩石的完整性关系更密切在界河金矿采空区探测中利用地震波速和吸收系数为层析物理量，在巷道和地表间进行透射观测，以优于2m的分辨率清楚地揭示了测区内采空区和断裂破碎带的分布，探测结果已被后期的采掘所证实．探测的成功为解决同类问题提供了一种可行的方案，对促进工程地球物理探测技术的发展也有重要意义．
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| 关 键 词： | 地震CT 相对吸收系数 采空区 |
| 收稿时间： | 1997-10-09 |
SEISMIC TOMOGRAPHY AND ITS APPLICATION TO THE INVESTIGATION OF BURIED WORKED-OUT AREA |
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| WANG CHAO-FAN,ZHAO YONG-GUI,JIN HONG-XIAO,GUO HONG,LI QIN.SEISMIC TOMOGRAPHY AND ITS APPLICATION TO THE INVESTIGATION OF BURIED WORKED-OUT AREA[J].Chinese Journal of Geophysics,1998,41(Z1):367-375. |
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| Authors: | WANG CHAO-FAN ZHAO YONG-GUI JIN HONG-XIAO GUO HONG LI QIN |
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| Institution: | 1. AVIC Institute of Geotechnical Engineering Engineering, Beijing 100086, China;
2. Institute of Geology, Chinese Academy of Sciences, Beijing 100029, China |
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| Abstract: | It is difficult for engineering geophysics to investigate worked-area and cave. The investigation in Zhaoyuan Jiehe Gold Mine, Shandong Province, firstly used the combination methods of velocity tomography and attenuation tomography tO study buried worked-out area. Using seismic travel-time, seismic tomography is to inverse the velocity structure of geology bodies; and attenuation tomography is to inverse the absorption coefficient distribution through the observation of energy vacation. Working with seismic travel-time and relative absorption coefficient, and arranging sources and receivers betWeen the surface and horizontal tunnel, the investigation in Jiehe Gold Mine clearly showed the location and shapes of the worked-out area with resolution less than 2m. The result of investigation has been confirmed by the later excavation. This success provides a feasible scheme for the similar Problem, and will have have significance to development of engineering geophysics. |
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| Keywords: | Seimic tomography Relative absorption Worked-out area |
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