摘要
介绍了用于矿井直流电法三维正演模拟不同数值计算方法的特点及其适用范围,提出了用对数等间距和算术等间距相结合的网格剖分方式,说明了电极互换原理所满足的地质条件。针对合成系数矩阵为非对角占优的特点,采用了大数处理方法,使其线性方程组适用于现有的求解方法。最后通过对具体问题的探讨,阐述了地质模型的计算精度和计算时间之间的相互关系,为模型参数的选择提供了一定的理论基础。
This paper deals with the properties and applied ranges of different numerical calculation methods in 3D forward simulation for mine direct current method, puts forward the application of logarithmic even space and arithmetical even space to dissecting the discussed model, and explains the geological conditions met by electrode interchange. Considering the 'non-biggest' diagonal elements characteristics of the coefficient matrix, the paper adopts the 'big-data' processing method to fit the calculation method of the available linear equations. Through discussing some concrete problems, the authors expound the interrelationship between calculation precision and calculation time of the geological model, thus providing theoretical basis for selecting model parameters.
出处
《物探与化探》
CAS
CSCD
2004年第2期170-172,176,共4页
Geophysical and Geochemical Exploration
基金
国家自然科学基金资助项目(40074030)
关键词
矿井直流电法
正演模拟
网格剖分
矩阵压缩
mine direct current method
forward simulation
grid dissection
matrix compression
