双层水位理论与下层局部疏干法

Theory of Two-layer Water Levels and Dewatering Method at Lower Layer

金岭铁矿在地下水疏干实践中，发现巨厚层灰岩中存在双层水位的现象，并据此提出了一种不同于传统的全面疏干法和减压疏干法的新方法──下层局部疏干法，并在该矿３个矿区实施，取得了良好的经济效益和社会效益。

In the practice of dewatering underground water in Jiming iron Mine,it is found out that there aretwo-layer water levels in the very thick limestone bed,therefore,a new dewatering method-the localdewatering method at lower layer is put forward,which differs from the traditional over all dewateringmethod and the reducing pressure debatering method.