煤田地质与勘探2026，Vol.54Issue(4)：152-163,12.DOI:10.12363/issn.1001-1986.25.11.0879
煤矿巨厚含水层垂向非均质性分层精细试验研究
Exploring the vertical heterogeneity of extremely thick aquifers in coal mines through layered fine-scale pumping tests
摘要
Abstract
[Objective]Extremely thick aquifers in mining areas typically exhibit strong heterogeneity and high water yield.Therefore,they are prone to cause severe water inflow in mines and induce water disasters,representing a major factor affecting the mining safety of numerous mines in China.However,the vertical heterogeneity of these aquifers re-mains poorly understood,emerging as a primary bottleneck in the prevention and control of such water hazards.[Meth-ods]To scientifically reveal the vertical heterogeneity characteristics of extremely thick aquifers,this study investigated the extremely thick Luohe Formation aquifer in a coal seam roof of a representative coal mine in the Huanglong coalfield,Shaanxi Province.Focusing on the core concept of layered fine-scale investigation and using methods includ-ing theoretical analysis,field experiment,and laboratory test,this study conducted pumping tests,as well as relevant analyses and testing,of the aquifer based on nine layers in a single borehole.[Results and Conclusions]A new test method for equal-diameter,layered,fine-scale pumping using a single hydrological borehole was developed.Through generalization,a model of flow into a partially penetrating well was established for single-borehole,layered aquifer pumping.Furthermore,an analytical method for calculating hydrogeological parameters,tailored to layered pumping,was derived.Accordingly,the process and construction method for layered pumping tests on extremely thick aquifers were established.The permeability coefficients and unit water yield of the nine layers of the Luohe Formation aquifer were calculated based on field test results.Concurrently,the groundwater levels,temperatures,and hydrochemical char-acteristics of the layers were determined,followed by the analysis of layers with close hydraulic connections.Based on various calculated and analytical results,the Luohe Formation aquifer was divided into upper,middle,and lower seg-ments,with the lower segment subdivided into lower sub-segments 1 and 2.Then,the equivalent permeability coeffi-cients of these segments were calculated.The water inflow of a mining face in a representative mine of the Huanglong coalfield was predicted using relevant parameters.The prediction results were then compared with the actual water in-flow to verify the reliability of the parameter estimation methods.The results of this study can provide significant guid-ance for gaining scientifically robust insights into the heterogeneous structure of extremely thick aquifers in mining areas and for assessing the degree of influence of these aquifers on water filling in mines.关键词
巨厚含水层/垂向非均质性/单孔同径抽水试验/含水层精细探查Key words
extremely thick aquifer/vertical heterogeneity/single-borehole equal-diameter pumping test/fine-scale aquifer investigation分类
天文与地球科学引用本文复制引用
郭小铭..煤矿巨厚含水层垂向非均质性分层精细试验研究[J].煤田地质与勘探,2026,54(4):152-163,12.基金项目
陕西省重点研发计划项目(2025SF-YBXM-510) （2025SF-YBXM-510）
陕西省自然科学基础研究计划重点项目(2023-JC-ZD-27) （2023-JC-ZD-27）
陕西省杰出青年科学基金项目(2025JC-JCQN-012) （2025JC-JCQN-012）
