基于Neuman井流理论确定玄武岩潜水含水层渗透系数的应用——以吉林靖宇煤矿为例

Application of Determing Permeability Coefficient of Basalt Phreatic Aquifer Based on Neuman Well Flow Model—Setting Jingyu Coal Mine in Jilin Province as an Example

摘要:

全面分析研究区玄武岩潜水含水层水文地质条件的基础上，对稳定流和非稳定理论确定潜水含水层渗透系数的优缺点进行了对比，认为非稳定井流公式确定玄武岩潜水含水层渗透系数是合理的。Aquifer Test软件基于Neuman井流理论配线法求参原理，运用计算机完成了自动求参，避免了人工配线的不足。该文根据吉林靖宇煤矿研究区玄武岩潜水含水层非稳定流抽水试验，分别用Aquifer Test软件和稳定井流公式进行了求参，并对比分析得出：玄武岩含水层弹性释水作用影响时间较长，利用Neuman潜水井流公式求参可靠，且更逼近现实；用Aquifer Test软件实现了自动求参，具有操作简单规范、可比性好的优点。

Abstract:

On the basis of analyzing hydrogeological conditions of basalt phreatic aquifer in studying area, comparing the advantages and disadvantages of steady flow and unsteady flow pumping test, it is regarded that it is reasonable to determine permeability coefficient of basalt phreatic aquifer by using unsteady well flow formula. Based on Neuman well flow model, Aquifer Test software can calculate hydrogeological conductivity and avoid manual parameter by computer. According to unsteady flow pumping test of basalt phreatic aquifer in Jingyu coal mine, hydrogeological conductivity has been calculated by using Aquifer Test software and steady well flow formula respectively. Through comparision and analysis, it is regarded that basalt phreatic aquifer release water time is long by own compression deformation. So it is reasonable to calculate hydrogeological conductivity of basalt Phreatic aquifer by using Neuman well flow model. The parameters gained by Aquifer Test software are normative and have good comparability.