在新疆开采地下水,多取自山前冲积扇地带。在此地貌单元上,含水层不但透水性好,而且补给条件优越,但该地层多为粗颗粒的漂卵石,对钻井施工极为不利。在多年的施工实践中,我们经过对冲击钻头的类型,形状、各部位的尺寸,以及使用与加焊,不断地摸索与改进,终于试验成功了 Groundwater exploitation in Xinjiang, mostly taken from the piedmont alluvial fan zone. In this geomorphic unit, the aquifer not only has good water permeability but also has excellent supply conditions. However, the formation is mostly coarse-grained pebble, which is extremely unfavorable for drilling construction. After years of construction practice, we finally succeeded in experimenting with the type, shape, size of each part, and the use and welding of the impact drill, constantly exploring and improving