跨孔弹性波CT成像在路基病害诊断中的应用
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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.
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 .
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 .
引文
[1]单娜琳,程志平,刘云祯.工程地震勘探[M].北京:冶金工业出版社,2006.
[2]李志辉,张立,刘争平.CT技术在铁路路基病害勘探中的应用[J].物探化探计算技术,2006,28(2):137-141.
[3]邱庆程,李伟和.跨孔地震CT层析成像在岩溶勘察中的应用[J].物探与化探,2001,25(3):236-240.
[4]雷旭友,李正文.地下洞穴在孔间电磁波法上的反映特征及洞径计算公式[J].物探化探计算技术,2006,28(2):142-145.
[5]孙宇,肖宽怀,赵永贵.地震CT勘探原理及其在公路隧道病害诊断中的应用[J].工程地质学报,2003,11(4):441-444.
[6]杨文采,杜剑渊.层析成像新算法及其在工程检测上的应用[J].地球物理学报,1994,37(2):239-244.
[7]朱介寿,严忠琼,曹俊兴.井间地球物理层析成像软件系统研究[J].物探化探计算技术,1994,11(4):309-320.
[2]李志辉,张立,刘争平.CT技术在铁路路基病害勘探中的应用[J].物探化探计算技术,2006,28(2):137-141.
[3]邱庆程,李伟和.跨孔地震CT层析成像在岩溶勘察中的应用[J].物探与化探,2001,25(3):236-240.
[4]雷旭友,李正文.地下洞穴在孔间电磁波法上的反映特征及洞径计算公式[J].物探化探计算技术,2006,28(2):142-145.
[5]孙宇,肖宽怀,赵永贵.地震CT勘探原理及其在公路隧道病害诊断中的应用[J].工程地质学报,2003,11(4):441-444.
[6]杨文采,杜剑渊.层析成像新算法及其在工程检测上的应用[J].地球物理学报,1994,37(2):239-244.
[7]朱介寿,严忠琼,曹俊兴.井间地球物理层析成像软件系统研究[J].物探化探计算技术,1994,11(4):309-320.
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