煤田地质与勘探2025，Vol.53Issue(2)：118-129,12.DOI:10.12363/issn.1001-1986.24.07.0491
关闭矿井地表抬升变形特征及其影响因素
Deformation characteristics and influential factors of the surface uplift of closed mines
摘要
Abstract
[Objective]The residual surface deformations of closed mines exhibit prolonged duration and complex evol-utionary processes,potentially leading to unconventional phenomena like surface uplift,which affects the re-exploita-tion and reutilization of closed mines.[Methods]This investigated a mining area in Huainan,Anhui Province as an ex-ample to explore the deformation mechanisms,characteristics,and influential factors of the surface uplift of closed mines.Through numerical simulations,this study analyzed the propagation process of surface uplift with an increase in the groundwater level.Accordingly,this study investigated the quantitative impacts of the mining height,groundwater level,and rock strength of the caving zone on the characteristics of the surface uplift.The results indicate that the pore water pressure in rock layers above the goaf increased with the groundwater level.Specifically,as the groundwater level increased from 30 m to 150 m,the pore water pressure in the central portion of the goaf increased from 5.99×102 kPa to 2.17×102 kPa,while that in the surrounding area decreased.Within the mining height threshold,the amplitude of over-burden rebound and surface uplift increased with the mining height.The deeply buried rock layers exhibited significant rebound,while the surface uplift occurred after four months of seepage,suggesting a lag effect.An increase in the groundwater level exerted a direct influence on the overburden rebound and surface uplift.The increasing groundwater level resulted in an overall rebound trend of the overburden generally.However,the rebound trend became weak as the groundwater level increased further.Notably,the rebound effect lessened when the groundwater level exceeded 146 m.The attenuation of the modulus of elasticity of the caving zone significantly intensified the surface uplift,with the amp-litude of the surface uplift exhibiting a linear positive correlation with the degree of the attenuation.Specifically,the amplitude of the surface uplift was 86.4 mm before the attenuation of the modulus of elasticity and was 160 mm as the degree of the attenuation increased to 50%.The findings of this study determine the deformation characteristics and pro-paganda mechanisms of surface uplift under different conditions,providing a significant reference for further research on the surface uplift of closed mines caused by an increase in the groundwater level.关键词
关闭矿井/水位回升/地表抬升源/动态机理/流固耦合/淮南矿区Key words
closed mine/increase in groundwater level/surface uplift source/dynamic mechanism/fluid-structure inter-action/Huainan mining area分类
矿业与冶金引用本文复制引用
罗锦,李英明,郭庆彪,赵光明..关闭矿井地表抬升变形特征及其影响因素[J].煤田地质与勘探,2025,53(2):118-129,12.基金项目
国家自然科学基金项目(52274164,52174102) （52274164,52174102）
安徽省优秀青年科学基金项目(2308085Y31) （2308085Y31）
中国科协青年托举人才工程项目(2022QNRC001) （2022QNRC001）
煤炭开采水资源保护与利用国家重点实验室开放基金项目(GJNY-21-41-15) （GJNY-21-41-15）
安徽省重点研究与开发计划项目(202104a07020001,2022m07020007) （202104a07020001,2022m07020007）
