填好滤料,对保证成井质量十分重要。黑山县姜屯公社在这方面积累了一些经验。1.选择滤料这个公社1960年以前共打井105眼,井深40～50米,含水层是细砂,滤料用的是40～60毫米粒径的卵石。结果,有的成井后不久就坏了,有的使用1～2年就坏了。原因是水中出砂,井口下沉,以至塌陷淤死。1965 Fill the filter, to ensure the quality of the well is very important. Montenegro County Jiangtun commune in this area has accumulated some experience. 1. Select filter The commune hit a total of 105 wells before 1960, well depth of 40 to 50 meters, the aquifer is fine sand, filter is used 40 to 60 mm particle size pebbles. As a result, some soon after the completion of the well is broken, and some use 1 to 2 years is broken. The reason is the sand in the water, sink well, and even collapse siltation. 1965