矿业科学学报2025，Vol.10Issue(4)：661-669,9.DOI:10.19606/j.cnki.jmst.2025044
老虎台煤矿浅部充填体原位渗透特性研究
In-situ permeability of the shallow backfill at Laohutai coal mine
摘要
Abstract
The inherent water conductivity and permeability characteristics of artificial porous filling ma-terials in underground mining pose potential water hazard risks to underground working faces.This study attempts to investigate the in-situ water conductivity of shallow filling materials in the Laohutai Coal Mine.We conducted laboratory testing,numerical analysis,and a combined connectivity test using so-dium chloride and atmospheric precipitation to explore the permeability of the filling materials under natural conditions.Results indicate that the shallow filling materials primarily consist of shale mixed with slag,fly ash,and river sand.These materials feature low strength,poor cohesion,and high brit-tleness,with rapid strength degradation upon water exposure.The estimated average permeability coeffi-cient from tracer tests aligned closely with numerical analysis results.Based on the combined sodium chloride and atmospheric precipitation connectivity tests,the conductivity curves of the underground monitoring points resulted from the combined effects of material composition and rainfall.The timing of conductivity inflection points at 5 monitoring locations reflected variations in the groundwater circulation rate within the filling body.The composition and distribution of the filling materials significantly influ-ence their permeability,with an average permeability coefficient of 5.8 m/h.This is consistent with the results of tracer tests and numerical analysis.关键词
充填体/渗透性/材料组分/数值分析/连通试验Key words
backfill/permeability/material composition/numerical analysis/tracer test分类
矿业与冶金引用本文复制引用
张健,刘守强,郭亮亮,刘钦..老虎台煤矿浅部充填体原位渗透特性研究[J].矿业科学学报,2025,10(4):661-669,9.基金项目
国家自然科学基金(52379018) （52379018）
山西省基础研究计划(20210302124485,202203021211127) （20210302124485,202203021211127）
