中文摘要：

宁夏清水营煤矿1号回风斜井局部破坏较严重,多次发生大面积顶板冒落。通过对冒落区现场调查,并根据现场工程地质条件,利用有限差分程序法和物理相似模拟实验,分析其顶板局部失稳机理,指出导水裂隙带和剪切变形局部化效应是导致有效应力变化和塑性区失稳的主要原因。提出对于冒落轻重区分别采用＂锚—网—钢带—喷＋11号矿工字钢棚梁＂联合支护方案。工程效果表明,这种支护技术对于此类围岩是一种有效的经济支护方式。

英文摘要：

The 1st air return inclined shaft of Qing Shui Ying mine in Ningxia has been seriously damaged locally,roof fall has occurred for many times in large area.Through on-site investigation in falling area to explore the reasons for destruction,and according to the engineering geological conditions of the site,finite difference procedure and physical similarity simulation experiments were used to analyze the local instability mechanism of the roof,it was identified that the effect of localization of water-conducting fractured zone and deformation was the main reason inducing change of ef-fective stress and instability of plastic zone.Aimed at areas with light and serious falling,the joint suport program of ＂bolt-steel net-steel belt-groutting and no.11 mine-steel shelf beam＂ was proposed.Engineering results showed that the supporting technology for this type of surrounding rock was effective and economic.