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요약정보
跨孔电阻率CT反演成像影响因素分析研究 / Analysis on Influencing Factors of Cross-hole Resistivity CT Inversion Imaging
Resource Type
Academic Journal
Authors
姬同旭
;
吴维义
;
李昌龙
;
JI Tongxu
;
WU Weiyi
;
LI Changlong
Source
山西煤炭 / Shanxi Coal
. 42(1):106-112
Subject
反演成像;井间距;不同装置;测量电极距
Language
Chinese
ISSN
1672-5050
Online Access
Find it @ DONGA
초록
跨孔电阻率CT法是一种把电极点放入钻孔内进行测量的物探直流电阻率勘探方法,在精细探查领域具有良好前景.本文从不同井间距、不同装置以及不同测量电极距三个方面开展了跨孔电阻率CT法反演成像影响因素分析,并得到如下结论:随着孔间距的增大无论是哪种二极装置观测其成像结果都在慢慢变差,特别是当孔间距为30 m时,跨孔观测反演和单孔观测反演结果的异常体形态均发生较大变化;在横向上二极装置较其他装置更优;在纵向上三极装置和四极装置的分辨率要好于二极装置.跨孔电阻率CT测量时电极间距的选择采用"多电极距+单孔组合"测量,电极距选择孔间距的一半或一半略小.跨孔电阻率CT反演结果表明无论异常体的分辨率以及假异常的形态如何变化,该方法对于异常体位置和大小都有很好的成像结果.
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