Marble karst development in Da-hong-shan mine caused a great deal of water bursting in mine shaft, sharply lowering ground water and large scale of surface subsidence.
大红山矿大理岩岩溶发育，由于突水造成井下大量涌水，同时引起地下水位急剧下降，引发了较大范围、较大规模的地面塌陷。
Abstract: The method to lowering ground water level is introduced which combines shallow-water well with deep-water well in well point. The paper also provides practical experience for future work.
文摘：阐述了轻型井点与深井井点二种形式相结合的降水法在实践中的应用，为将来大面积降水提供实践经验。
According to the general pattern of ground water lowering, this paper suggested a volume calculation method in the natural river courses in the freezing period.
根据地下水退水的一般规律，提出了针对天然河道封冻期流量推求方法的建议。
This paper recommends a method of lowering the ground water table by setting up the horizontal drains in hill slopes.
介绍在土坡中设置水平渗水管来降低地下水位的一种方法。
Introduces the character, fundamental, technological process and system layout of jet well ground water lowering device.
简要介绍了射流井点降水装置的特点、基本原理以及装置的工艺流程及系统布置。
Introduces the character, fundamental, technological process and system layout of jet well ground water lowering device.
简要介绍了射流井点降水装置的特点、基本原理以及装置的工艺流程及系统布置。
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