【摘要】 跨孔地震层析成像(简称CT)法,是利用大量地震波传播时间与其相应的射线在成像单元内所经过的路径以及待求速度的关系建立大型线性方程组,反演出路基下介质的波速,再根据钻孔资料可建立地下地质模型,进而准确定位出路基病害(煤窑采空区、岩溶、软弱层等)的位置,为路基的设计提供基础资料.用这种方法对某段铁路路基下存在的煤层、煤窑采空区的分布情况进行勘测,取得了理想的效果.更多还原

【Abstract】 Cross-hole seismic Computerize Tomography technology(for short CT) is to set up a large linear equations by utilizing the relationship among the travelof lots of seismic wave travel time and its corresponding ray passing route within imaging unit and pending velocity. It can inverse the wave velocity of the under road-bed medium, and also can establish subsurface geological model according to bore information, then find the road-bed disasters exactly(the coalpit work-out area,karst,oozy earth etc.), and offer the basic information for road-bed designing. It has obtained ideal result when the method is used to explore the distribution of coal layer、coalpit work-out area under a certain railway road-bed. Generally speaking,the velocity of work-out area and other geological disasters is lower than wall rock .更多还原