井筒冻结法在大贾庄铁矿井建中的应用

Application of Shaft Freezing Method in Dajiazhuang Iron Ore Mine Construction

大贾庄铁矿主井区域水文地质条件复杂,第四系含水大,井筒掘进时将受到涌水的严重影响。为避免井筒在掘进中出现大量涌水而造成不必要的损失,在井筒掘进前对第四系和强风化带段井筒采取冻结法施工的方式,以保证井筒掘砌施工安全和工程质量。

The hydrogeological conditions of the main shaft area of Dajiazhuang Iron Ore Mine are complex,and the Quaternary System has rich water,which will cause the shaft to be severely affected by water inrush during shaft sinking.In order to avoid unnecessary losses due to a large amount of water inrush during shaft sinking,the quaternary and shaft at strongly weathered zone are constructed by freezing method before shaft sinking to ensure the safety and quality of the shaft construction.