山东煤炭科技2024，Vol.42Issue(8)：76-81,6.DOI:10.3969/j.issn.1005-2801.2024.08.016
急倾斜煤层群保护层开采条件下采场应力演化规律
Stope Stress Evolution Law Under Mining Condition of Protective Layer of Steeply Inclined Coal Seam Group
段元华1
作者信息
- 1. 遵义市播州区工业经济局,贵州 遵义 563100
- 折叠
摘要
Abstract
The mining of steeply inclined coal seam group involves complex rock stratum migration processes and can easily lead to strong mine pressure accidents.In order to ensure the safe mining of the coal seam group in Xing'an Coal Mine,protective layer mining technology is used to optimize the pressure relief of the main mined coal seam.A numerical model of steeply inclined coal seam mining is established using FLAC3D numerical simulation software to explore the distribution and evolution law of stress and displacement in the stope and the protected coal seam stress and displacement under the mining condition of the protective layer.Theoretical calculation methods are used to analyze the effective pressure relief protection range and verify the reliability of protective layer mining technology.The research results indicate that under the mining condition of steeply inclined coal seam protective layer,there will be a non coaxial phenomenon of displacement and stress expansion.During the advancement process of the protective layer,the evolution of stope stress and displacement shows a three-stage evolution law of initial growth,rapid growth,and gradual stability.The effective pressure relief range of the protective layer mining exceeds 80%.关键词
急倾斜煤层/保护层开采/矿山压力/应力演化/煤层群开采Key words
steeply inclined coal seam/protective layer mining/mine pressure/stress evolution/coal seam group mining分类
矿业与冶金引用本文复制引用
段元华..急倾斜煤层群保护层开采条件下采场应力演化规律[J].山东煤炭科技,2024,42(8):76-81,6.
