关键词:  支持向量机, 主要影响角正切, 开采沉陷

Abstract: The tangent of the main influencing angle is an important parameter for mining subsidence prediction and surface displacement range demarcation.On the basis of the relationship analysis between the tangent of the main influencing angle and the geologic and mining conditions，the data from the typical ground movement observation stations of China was used as training samples.With a reasonable selection of kernel function of SVM，penalty parameter C and insensitive loss parameter ε,a SVM regression relationship model of the tangent of the main influencing angle and the other factors was established to predict on the samples.The results showed that the SVM prediction method is accuracy and can be applied to the actual engineering.Multiple influence factors could be considered comprehensively in this method，and a new approach to quickly and accurately calculate the tangent of the main influencing angle is proposed for the future.

Key words: SVM, Tangent of the main influencing angle, Mining subsidence