利用单孔稳定流抽水试验评价刘庄西区进回风井基岩段地下水径流条件

通过对井筒检查孔的单孔稳定流抽水试验检测值的统计分析,得出了刘庄西区风井基岩段含水层的降深与流量、抽水引起的平均水力梯度与抽水流量之间的函数关系,并根据有关系数的取值定性地评价了刘庄西区基岩段含水层的地下水补给条件和渗透性随深度的变化;通过对各次抽水试验的理论影响半径分析,证明了进、回风井之间基岩含水层仅存在较弱的侧向水力联系。

Applying Single-hole Steady Flow Pumping Test to Evaluate Hydraulic Properties of Basement Rock Aquifers around Liuzhuang Western Weathering Shafts

Based on statistical analysis of data measured from the single-hole steady flow pumping tests performed in the geological exploring boreholes at Liuzhuang weathering shafts,functional relationships between drawdown and flow rate as well as between average pumping induced hydraulic gradient and flow rate were established for the basement rock aquifers,in which the weathering shafts should be sunk.The recharging condition of aquifers and the change tendency of aquifer conductivity with depth were estimated by comparing the forms of established regressive functions and the values of its constant items for different aquifers.Furthermore,the analysis of theoretical influence radius corresponding to different steady drawdown showed there is only weak hydraulic concern between the two shafts.