矿业科学学报2025，Vol.10Issue(6)：1100-1111,12.DOI:10.19606/j.cnki.jmst.2025151
双巷布置小煤柱下采空区气体运移规律研究
Gas migration patterns in goaf under small coal pillars arranged in two-tunnel arrangement
李智勇 1张文乐 2高辉 1王旭锋 3段晓鹏3
作者信息
- 1. 陕西华电榆横煤电有限责任公司,陕西 榆林 719000
- 2. 中国矿业大学矿业工程学院,江苏 徐州 221116||山东济矿鲁能煤电股份有限公司阳城分公司,山东 济宁 272000
- 3. 中国矿业大学矿业工程学院,江苏 徐州 221116
- 折叠
摘要
Abstract
The optimization of coal pillar dimensions in a double-tunnel layout,influenced by multiple mining activities,alters its spatial permeability.This leads to more complex gas migration patterns be-tween the working face with a small coal pillar and the adjacent goaf,as well as more intricate distribu-tion of the spontaneous combustion"three zones".To address this,this study takes the 13212 and 13214 working faces of the Xiaojihan Coal Mine for a case study.We first determined the coal pillar size based on its bearing characteristics,and analyzed evolution of its permeability,thus revealing its gas migration patterns in the working face with a small coal pillar and adjacent goaf.Results show that:① Under the double-tunnel layout,considering the impact of multiple mining activities on coal pillar bearing,the optimal coal pillar size was 10 m.② Under the influence of secondary mining,the perme-ability of the 10 m coal pillar underwent changes within a zone extending 56 m ahead of the working face.③ Compared with the original layout with a 30 m coal pillar,the 10 m coal pillar configuration reduced the maximum width of the oxidation zone by 8 m.A new annular oxidation zone formed in the adjacent gob(13214 gob),with a maximum impact width of 136 m.关键词
双巷布置/小煤柱/承载特性/渗透性演化/气体运移规律Key words
two-tunnel arrangement/small coal pillar/bearing characteristics/permeability evolution/gas transport patterns分类
矿业与冶金引用本文复制引用
李智勇,张文乐,高辉,王旭锋,段晓鹏..双巷布置小煤柱下采空区气体运移规律研究[J].矿业科学学报,2025,10(6):1100-1111,12.
