兴隆庄井田奥灰水单孔小口径抽水降距问题分析

Analysis of Ordovician Limestone Water Small Diameter Single Borehole Pumping Test Drawdowns

针对岩溶发育的大水矿区,在进行小孔径抽水试验工作时,现有的国产压风机虽然尽了最大机械能力,但水位的降低值仍然达不到规范的质量要求,不得不将小孔径抽水试验改为大口径或孔组抽水的情况,采取了加长风管长度,用进口在压风机的方法,完成了兴隆庄井田O2-7号水文孔的小孔径抽水试验工作。从抽水试验的曲线来看,该方法切实可行,有一定推广价值。

In allusion to pumping test in karst developed ample flow mine areas, existing homemade air compressors cannot accomplish the standard quality requirement of water level drawdowns, in despite of already reached to the greatest extent of mechanical capacity, thus have to change small diameter into large diameter or group wells pumping tests. Thus lengthened air pipes and imported air compressor were used and finished the small diameter borehole pumping test in the Xinglongzhuang minefield O2-7 hydrogeological borehole small diameter pumping test. From the pumping test curves, we considered that the method is practicable and can be popularized.