建立了破裂岩石强度和变形特征的拟合方程；推导出圆形巷道支护阻力与围岩位移量的显式关系式；分析了不同岩性条件下，支护阻力对围岩位移量的控制程度；并同神经网络拟合结果进行了对比；提出了支护阻力对控制软岩巷道具有重要作用及敏感作用范围的观点；在铁法矿区进行了工程实践，有效地控制了深井软岩巷道。 Established the fitting equation of the strength and deformation characteristics of the ruptured rock; deduced the explicit relationship between the supporting resistance of the round roadway and the displacement of the surrounding rock; analyzed the control of the displacement of the surrounding rock under different lithology conditions And compared it with the results of neural network fitting. The viewpoint that the support resistance plays an important role in controlling soft rock roadway and the sensitive scope of action is proposed. The project practice in Tiefa Mining Area has effectively controlled the deep soft rock tunnel .