野外普查找矿过程中,经常发现大量放射性异常,这些异常有的受岩性控制,有的则与构造有关,有时还与一些化学元素诸如:Th,K,Pb,Cu,Mn,Zn 等有着复杂的关系。在许多复杂的因素中,弄清哪几种因素与异常关系密切,这对评价异常以指导找矿有着重要意义。传统的对比方法以及回归分析方法虽都能对解决所述问题起作用,但当变量数很多时,则对比方法就难于实现,而回归分析的计算工作量就很大而需要依靠电子计算机。正交试验法在解决从许多因素中确定主要因素的问题上具有计算简单、效果明显等优点。 During the prospecting process in the field, a large number of radioactive abnormalities are often found. These anomalies are controlled by lithology, and some are related to tectonics. Sometimes they are also associated with some chemical elements such as Th, K, Pb, Cu, Mn and Zn Complex relationship. Among many complicated factors, it is important to find out which factors are closely related to the anomaly, which is of great significance in evaluating anomalies and guiding mineral prospecting. Although the traditional comparison method and the regression analysis method can both solve the above problems, the comparison method is difficult to be implemented when the number of variables is large, and the computational workload of regression analysis is very large and depends on the electronic computer. Orthogonal test method in solving the problem of determining the main factors from many factors has the advantages of simple calculation, obvious effect and so on.