本文通过理论分析和现场实测初步探讨了小铁山矿处于绢云母化凝灰岩中采准巷道围岩变形随时间发展的规律。指出在地应力作用下,围岩产生塑性区是不可避免的,塑性区内破碎岩石的蠕变及弹塑边界处岩石的静态疲劳是围岩变形随时间增大的主要原因。在大变形岩层中,带托板砂浆锚杆由于自身的屈服具有可允许变形大而不失去其支护作用的优点,对保证围岩的稳定具有良好的效果。 In this paper, through the theoretical analysis and field measurement, the law of the deformation of the surrounding rock of the mining laneway in the sericite tuff is developed with time. It is pointed out that the plastic zone of surrounding rock is unavoidable under the effect of ground stress. The creep of crushed rock in plastic zone and the static fatigue of rock at elastic-plastic boundary are the main reasons for the deformation of surrounding rock with time. In the large deformed rock, the anchor with pallet mortar has the advantages of large allowable deformation due to its own yield without losing its supporting function, which has good effect on ensuring the stability of surrounding rock.