安全与环境工程2025，Vol.32Issue(5)：80-87,8.DOI:10.13578/j.cnki.issn.1671-1556.20250010
煤矿地下水库煤柱坝体渗流路径与留设宽度
Seepage path and width of coal pillar dam in underground reservoir of coal mine
摘要
Abstract
Accurately predicting the dominant seepage path of high-salinity water and reasonably selecting the width of the coal pillar dam are of great theoretical and practical significance for ensuring the safe and stable operation of coal mine underground reservoirs and improving coal mining efficiency.This study focuses on the coal pillar dam of the Lingxin Coal Mine underground reservoir.Based on the structural and mechanical characteristics of the coal and rock strata in the Lingxin Coal Mine,the FLAC3D numerical simulation software was employed to analyze the reasonable width of the coal pillar dam between the underground reservoir and the L0614 working face in the sixth mining area.In addition,the variation law of the coal pillar dam's permeability in different directions was investigated by combining the stress distribution obtained from numerical simulations with a seepage-stress coupling model.The results indicate that during the mining process of the L0614 working face,the upper part of the coal pillar dam is damaged first,making it prone to forming dominant channels for high-salinity water seepage.When the L0614 working face is designed with a length of 915 m and the coal pillar dam has a width of 68 m,the most severe damage occurs approximately 110 m ahead of the cut.At this point,the plastic failure zone in the upper part of the coal pillar dam connects the underground reservoir with the working face,suggesting that the coal pillar dam width should be greater than 68 m.Furthermore,the seepage-stress coupling model reveals that the vertical permeability significantly increases in both the upper and lower parts of the coal pillar dam.The findings provide a theoretical basis for the safe and efficient storage of high-salinity water in underground reservoirs and for the rational design of coal pillar dam widths in coal mine underground reservoirs.关键词
地下水库/煤柱坝体/渗流路径/留设宽度/渗流-应力耦合Key words
underground reservoir/coal pillar dam/seepage path/width of coal pillar dam/seepage-stress coupling分类
资源环境引用本文复制引用
周志伟,李旭,许光泉,贺江辉,张海涛,郭强..煤矿地下水库煤柱坝体渗流路径与留设宽度[J].安全与环境工程,2025,32(5):80-87,8.基金项目
国家自然科学基金项目(42102293、42272281) （42102293、42272281）
深部煤炭安全开采与环境保护全国重点实验室开放基金项目(2025YB020) （2025YB020）
矿井水害探查与预警工程研究中心开放基金项目(2024-CIERC-02) （2024-CIERC-02）
