煤炭与化工2024，Vol.47Issue(6)：28-31,4.DOI:10.19286/j.cnki.cci.2024.06.006
近距离煤层遗留煤柱下掘进巷道围岩控制技术研究
Research on surrounding rock control technology for mining roadway under residual coal pillars in close distance coal seams
王志根1
作者信息
- 1. 中煤华昱南阳坡煤业有限公司,山西朔州 036999
- 折叠
摘要
Abstract
In response to the difficulty in controlling the surrounding rock of No.24202 return air roadway under the residual coal pillar in the close distance coal seam of Nanyangpo Mine during excavation,the vertical stress distribution and plastic zone expansion morphology after excavation were analyzed using FLAC3D numerical simulation software.The maximum depth of roof failure was 3.5 meters,and the two sides were 1.5 meters.Based on numerical simulation results and actual engineering conditions,a high-strength prestressed long and short anchor rod(cable)collaborative bearing support scheme was designed.Within an observation period of 50 days,the maximum movement of the two sides of the 24202 tailgate was controlled at 87 mm,and the maximum movement of the top and bottom plates was 92 mm.This effectively prevented disasters such as roadway roof caving and fragmentation,providing a certain idea for controlling the surrounding rock of the roadway under the same type of geological conditions.关键词
近距离煤层/遗留煤柱/数值模拟/围岩控制Key words
close distance coal seams/residual coal pillar/numerical simulation/surrounding rock control分类
矿业与冶金引用本文复制引用
王志根..近距离煤层遗留煤柱下掘进巷道围岩控制技术研究[J].煤炭与化工,2024,47(6):28-31,4.
