第26卷第6期 2012年12月
现代地质 GEOSCIENCE
直流电法电位测量中提高计算精度的
方法技术研究张刚，贾正元
（中国地质大学地球物理与信息技术学院，北京
天100083）
Vol. 26 Ne. 6 Dee. 2012
摘要：直流电法是电法励探中的重要分支，它是采用地表供电或者井中供电，在地面测量电位响应的勘探方法。利用地面测得的异常电位响应来分析地下的物性分布情况并推断地下矿体的空间位置。以采用方波供电方式所测得的电位数据为例来分析和研究计算人工电位的方法，结果表明：当采集电位数据质量好时，采用不同长度的窗口宽度计算得到的人工电位变化不大；当采集电位数据质量差时，采用不同长度的窗口宽度计算得到的人工电位变化比较大：假设加人不同比例的随机噪声理论电位数据，并采用不同窗口宽度进行理论计算人工电位时，取较小长度的窗口宽度计算
得到的人工电位比较精确。这些为下一步的数据处理与解释奠定基础。关键词：直流电法；人工电位；自然电位；窗口宽度
中图分类号：P631.3
文献标志码：A
文章编号：10008527(2012)06120606
ResearchontheMethodof ImprovingAccuracyforCalculating
Manual Potential in Direct Current Prospecting
ZHANG Gang,JIA Zheng-yuan
(School of Geophysics qnd Information Technology, China Uniersity of Geosciences, Bejing100083, Chine)
Abstract: Direct current prospecting is a main method of electrical exploration in which the electric current is injected from the ground or in the borehole, and potential is received on the ground. Distribution of the under enoaeaeaodeouaaoakeesaaddeasn spatial location of the underground ore body is deduced. This paper mainly study the method for calcuiating the manual potential from the observation electric potential measured by the square wave power supply. The results show that, when the collecting potential data are high quality data, there is litle change in artificial potential calculated by using different lengths of window widths; while the collecting potential data is low level quality da-ta, there is great change in artificial potential calculated by using different lengths of window widths; assuming that there is a group of theory potential data adding different proportions of random noise, using the different window widths for theoretical calculations of artificial potential, we can get accurately artificial potential by tak-ing a short window width. These conclusions lay the groundwork for the next step of the data processing and in-terpretation.
Key words: direct current prospecting; manual potential; spontaneous potential; window width
0
引言
学性质之间的电学差异为基础，观测和研究电场或电磁场（天然或人工)在空间和时间上的分布规
电法勘探是以研究地壳中各种岩石、矿石电律来勘查地质构造和导找有用矿藏的一类物探方
收稿日期：2012-06~15；改回日期：2012-08-18；责任编辑：孙义梅。基金项目：中央高校基本科研业务费专项资金资助项目（2011YYL135）。
剧，男，硕士研究生，1987年出生，地球物理学专业，主要从事并地电法三维正、反演数值模拟方面的研究工
作者篇介：张
作。Email; zg happy@ yahoo. com.cn