揭露两个含水层混合井初始混合水位形成机理研究

Formation mechanism of initial water level in a mixed well of two aquifers

混合井水位形成机理基础理论研究具有重要的理论意义和广泛的现实意义。为了研究混合井初始混合水位形成机理,以完整揭露两个含水层的地面抽水钻孔为例,通过公式推导获得了混合井初始混合水位计算公式。在高家堡矿井T1、T2钻孔中进行了现场应用,计算T1钻孔洛河组全段地下水位为+927.399 0 m,T2钻孔洛河组中段地下水位为+926.236 2 m和+928.262 5 m。实测T1钻孔洛河组全段地下水位为+927.74m,与计算值接近;计算的T2钻孔洛河组中段地下水位显著高于该钻孔实测洛河组上段水位(+925.99 m),符合实际情况。通过对比分析,验证了初始混合水位计算结果的准确性和计算公式的正确性。

The basic theoretical research on the formation mechanism of groundwater level in mixed well has important theoretical significance and extensive practical significance.In order to study the formation mechanism of the initial water level in a mixed well of aquifers,this paper has got the calculation formula of the initial water level in a mixed well of two fully penetrating aquifers.The formula was used in T1 and T2 boreholes of Gaojiabu mine field,the groundwater level of Luo river aquifer in T1 borehole was+927.399 0 m,and the groundwater level of the middle aquifer of Luo river formation were+926.236 2 m and+928.262 5 m.The measured groundwater level of Luo river aquifer in T1 borehole is+927.74 m,which is close to the calculated value;The groundwater level of the middle aquifer of Luo river formation in T2 borehole is higher than the groundwater level(+925.99 m) of the upper aquifer of Luo riverformation in the same borehole,which is in line with the actual situation.Through analysis,it is easy to find out that the calculated initial water level in a mixed well were accurate,and the calculation formula is correct.