深井软岩巷道围岩控制机理

Mechanism of surrounding rock control of deep-seated roadway in soft strata

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。

A fitting equation of the strength and deformation feature of broken rock is built. Under the condition of circle cross section roadway, the relationship between the resistance of support and surrounding rock convergence is derived. For different rocks, the degree of support resistance to control the surrounding rock convergence is analyzed and compared with the results using nervo-network fitting method. It is proposed that support resistance has a limit range of sensitive action and affects the control of soft rock roadway significantly. In Tiefa Mining Bureau, The support designed according the above analysis has effectively controlled the stability of deep-seated soft rock roadway.