1970年夏,我队在学习卜弋煤矿“喷水井点排水”的基础上,经过反复试验,成功地采用了射流泵代替空压机在小口径钻孔中进行抽水试验。据本队四个钻孔的抽水说明,这一方法具有简单轻便、经济节约的特点,效果较好。一、工作原理、设备、器材射流泵是依据“喷水井点排水”的设备改装的。曾称为“喷射泵”,因考虑喷咀的工作水呈集束射出,故改称射流泵。抽水时,水泵产生的高压水(工作水,下同)沿高压水管向下流动,通过喷咀成束向上喷射,造成压力差,井内地下水不断补给低压区,上升涌出孔口, In the summer of 1970, on the basis of studying “Spillway Drainage” in Bo Yi Coal Mine, our team succeeded in using a jet pump instead of an air compressor to carry out pumping tests in small bore holes after repeated tests. According to the team’s four bored pumping instructions, this method has a simple and lightweight, economical and economical features, the effect is better. First, the working principle, equipment, equipment Jet pump is based on “spray well point drainage” equipment modification. Was called “jet pump”, because of considering the jet nozzle is a bunch of working water injection, it renamed the jet pump. Pumping, the pump produces high-pressure water (working water, the same below) along the high-pressure water pipe down through the nozzle into the jet beam upward, resulting in pressure difference, underground wells continue to supply low pressure area, rising gushing orifice,