地面地震CT在某核电厂勘测中的应用
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摘要
地面地震CT将地震CT技术从钻孔和巷道中解放出来 ,在地表面布置激发点和接收点 ,激震传波 ,利用所记录的直达波、反射波以及面波等震相的走时或振幅资料 ,进行CT反演 ,得到波速地震CT图像 ,反映测区覆盖层分区及基底岩性特点与构造分布。该方法应用于某核电厂勘测 ,CT图像解释与其他物探和钻探成果相吻合。
Surface seismic CT releases seismic CT technique from the work of hole drilling and laneway prospecting.To arrange the inspiring points and acceptance points on the ground surface,then the waves will transmit after being inspired.CT inversion can be made by making use of the traveltime and amplitude of earthquake phase recorded such as straight wave,reflected wave and the surface wave.Thus he seismic CT image of wave velocity is provided,which can reflect the characteristics and structure of covering layer and bottom rock.To apply this method to the exploration of the Nuclear Power Plant,we find the CT image analysis agree with the result of geophysical prospecting and borehole surveying.
Surface seismic CT releases seismic CT technique from the work of hole drilling and laneway prospecting.To arrange the inspiring points and acceptance points on the ground surface,then the waves will transmit after being inspired.CT inversion can be made by making use of the traveltime and amplitude of earthquake phase recorded such as straight wave,reflected wave and the surface wave.Thus he seismic CT image of wave velocity is provided,which can reflect the characteristics and structure of covering layer and bottom rock.To apply this method to the exploration of the Nuclear Power Plant,we find the CT image analysis agree with the result of geophysical prospecting and borehole surveying.
引文
[1]王超凡 ,赵永贵 ,靳洪晓 ,等 .地震吸收CT及其采空区探测中的应用 ,地球物理学报 [J],1998,(4 1) :36 7～ 375 .
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