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用同样一个空气压缩机的混合器进行抽水试验时,由于混合器三次沉没深度不同,很难得出三个精确的水位降低值。即使在最好的条件下,此种测定方法也只能够得出二个水位降低值。在使用同一个空气压縮机抽水的条件下,由于抽水管直径不同,得出的流量值和水位降低值也随之不同。然而,小直径的鑽孔就没有这种可能性,因为测定动水位的管子间有小的空隙。 鑑于此种情况,依尔库茨克地质分局所属某些勘探队在抽水管的弯管上装置两枚封密帽:一枚装在压风管上;另一枚装在直径不大的测水位管上(橡皮管Д—42毫米或气管Д—1″)。通过这些管子放入压
With the same air compressor mixer pumping test, due to the depth of the three submerged mixer, it is difficult to draw three accurate value of the water level reduction. Even under the best conditions, this method of determination can only yield two water level reduction values. In the same air compressor pumping conditions, due to the different diameter of the suction pipe, the resulting flow value and the value of the water level is also different. However, this is not the case with small diameter drills because there is a small gap between the pipes for dynamic water level measurement. In view of this situation, some of the exploration units belonging to the Irkutsk Geological Branch installed two sealing caps on the elbow of the suction pipe: one on the pressure pipe and the other on a small diameter Measure the water level on the tube (rubber tube Д-42 mm or pipe Д-1 ") through these tubes into the pressure