The Cross-well Seismic Computerized Tomography Technology and It's Application in The Cavern Survey
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摘要: 地下岩溶的存在,会对各种建设工程带来极大的危害或隐患。井间地震层析成像(地震CT)技术能有效、精细地反演出井间岩层的不均匀分布。本文阐述了该技术的方法原理,并介绍了应用该技术的一个岩溶勘察工程实例。在该工程中,笔者用钻探取芯结果约束地震CT的反演结果。分析结果表明,地震CT有较高的精度和可信度,在工程地质勘察中能做到对地下介质的精细成像,远远优越于常规勘察方法。Abstract: :The existence of cavern would bring great or potential dangers to every kind of construction engineering. Cross-well seismic computerized tomography(seismic CT) technology is a new geophysics method. This method can efficiently and accurately inverse the inhomogeneous distribution of layers between the wells. This theme is about the principles and methods of cross-well seismic CT technology, and it introduces the application of this technology in a factual cavern survey engineering. In the engineering, the authors combine the result of drilling survey and inversion result of seismic CT technology, and then analyze the two comparative results. As the analysis shows, the seismic CT technology have the advantages of higher precision and credibility, which can make preciser imaging of subsurface medium in engineering geophysics than usual explorative methods.
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