黑龙江科技大学学报2025，Vol.35Issue(3)：368-372,379,6.DOI:10.3969/j.issn.2095-7262.2025.03.004
基于极限平衡理论的大断面软岩巷道煤柱宽度研究
Study on width of coal pillars in large-section soft rock roadways
摘要
Abstract
This paper aims to address the floor heave caused by the large coal pillar retention in the 11303 working face of Hongqingliang Coal Mine.The study is accomplished by determining the appropri-ate coal pillar width by a combination of theoretical analysis and numerical analysis;using numerical sim-ulation method to analyze the distribution features of lateral support pressure in the 11303 working face at mining;and analyzing the impact of the coal pillar width on roadway stability under excavation disturb-ance.The results indicate that achieving the reasonable width range of the coal pillar from 7.11 to 8.2 meters according to the limit equilibrium theory;the increase of the coal pillar width after roadway exca-vation enhances the stability of the surrounding rock.The lowest stress peak appears at 8 meters of a coal pillar width during the mining process,together with the smallest roof displacement and the optimal road-way stability.The simulation results are consistent with the theoretical calculations,confirming that 8 me-ters is the optimal coal pillar width.关键词
软岩巷道/煤柱宽度/侧向支承应力/采动影响Key words
soft rock roadway/coal pillar width/lateral support stress/mining-induced influence分类
矿山工程引用本文复制引用
刘永立,王振锁..基于极限平衡理论的大断面软岩巷道煤柱宽度研究[J].黑龙江科技大学学报,2025,35(3):368-372,379,6.基金项目
黑龙江省"揭榜挂帅"科技攻关项目(2021ZXJ02A03) （2021ZXJ02A03）
黑龙江省"百千万工程"科技重大专项项目(2020ZX04A01) （2020ZX04A01）
