陕西煤炭2025，Vol.44Issue(3)：41-46,6.DOI:10.20120/j.cnki.issn.1671-749x.2025.0307
陕北榆林地区大采高工作面回采巷道煤柱尺寸优化研究
Optimization of coal pillar size in large cross-section mining roadway of large mining height working face
摘要
Abstract
To address the issue of suboptimal coal pillar width leading to resource wastage in the fully mechanized mining face of the thick coal seam at Xiaobaodang No.1 mine,based on the geomechanics and strength test of roadway surrounding rock,theoretical analysis and numerical simulation are adopted to optimize the size of coal pillar,and the reasonable width of coal pillar is determined by engineering analog and field measurement.The results show that the type of geo-stress field is σH＞σv＞σh type stress field,the maximum horizontal principal stress is NNE direction,the mining roadway is greatly af-fected by the maximum horizontal principal stress,and the coal rock mass in the roof and shallow side of the roadway is ob-viously damaged,and the cracks are relatively developed,while the deep rock layer is less affected by mining and has good integrity.Through theoretical analysis,engineering analogy and numerical simulation,the optimum coal pillar width is deter-mined to be 20 m.The deformation of coal pillar side measured on site is within a reasonable range,which meets the re-quirements of use and effectively improves the resource recovery rate.关键词
大采高工作面/大断面巷道/煤柱/优化设计Key words
large mining height working face/large cross-section roadway/coal pillar/optimal design分类
矿山工程引用本文复制引用
张慧峰..陕北榆林地区大采高工作面回采巷道煤柱尺寸优化研究[J].陕西煤炭,2025,44(3):41-46,6.基金项目
十四五国家重点研发计划(2023YFC2907503) （2023YFC2907503）
