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在相同或相近水文地质构造和井结构尺寸与型式相同条件下,往往出现机井出水量相差悬殊的情况。究其原因,主要是井队忽视洗井方法的正确选用而使洗井效果不佳所致。尤其在静水位埋藏深,泥浆液水头压差大而在含水层部位的井孔周围形成泥皮的情况下,采用通常的简易水泵抽洗法是不可能达到理想洗井效果的。而目前农村井队往往没有配备符合标准的活塞洗井器,主要靠水泵抽洗法洗井。结果使井的出水量普遍较小。如山西夏县某井队,因未配备专用活塞洗井器,而主要靠水泵抽水洗井,致使在中
In the same or similar hydrogeological structure and well structure size and type under the same conditions, there is often a disproportionate amount of well water discharge. The reason is mainly because the well team neglected the correct selection of the well washing method and caused the well washing well ineffectively. Especially in the case of deep buried hydrologic water and large head pressure of mud liquid, muddy skin is formed around the wellbore in the aquifer. It is impossible to achieve the ideal well flushing effect by the usual simple pumping method. At present, the rural well team is often not equipped with a standard piston washer, mainly by pumping water washing method. The result is that the well water output is generally small. For example, a well team in Xiaxian County, Shanxi, which is not equipped with a special piston washer,