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1 抽水试验的任务、类型及场地布置1.1 抽水试验的任务。抽水实验是以地下水井流理论为基础,在实际井孔中抽水和观测。任务是研究井的涌水量与水位降深的关系及其与抽水延续时间的关系;求得含水层及越流层的水文地质参数;研究降落漏斗的形状、大小;确定含水层的边界位置及性质;进行开采或疏干模拟,以确定井间距、开采降深、合理井径群等设计井群时所需的参数。1.2 抽水试验的类型。抽水试验的类型很多,由于尚未公认统一的分类原则,实际工作中常按所用井孔的多少,分为单孔、多孔抽水试验。
1 pumping test mission, type and site layout 1.1 pumping test mission. Pumping experiments are based on the groundwater well flow theory, pumping and observing the actual wellbore. The task is to study the relationship between well water inflow and water level drop and its relationship with pumping duration; to obtain hydrogeological parameters of aquifers and stratosphere; to study the shape and size of the landing funnel; to determine the boundary position of the aquifer; Nature; conduct mining or dredging simulation to determine the parameters required for well group design such as well spacing, mining depth reduction and reasonable well diameter group. 1.2 pumping test type. There are many types of pumping tests. Due to the unrecognized classification principle, the practical work is often divided into single holes and porous pumping tests according to the number of wells used.