急倾斜煤层耙运开采合理护巷煤柱尺寸研究

Study on Reasonable Size Chain Pillars for Scraper Mining in Steeply Pitching Seam

为了解决急倾斜煤层网格化锚固顶板无人工作面耙运开采护巷煤柱合理尺寸的问题,以木城涧煤矿+250 m水平南翼东一采区3槽煤为背景,采用理论计算、数值分析的方法研究了采场围岩应力分布规律及塑性破坏特征,确定了3槽煤区段护巷煤柱的合理尺寸,对运用该采煤方法的同类急倾斜煤层采面留设合理煤柱尺寸提供了依据。

To solve the question of reasonable size of roadway protection coal pillar in steep coal seam nobody working face which is mined with sake,based on the background of ＋ 250 m level 3 coal seam in first mining area of Muchengjian Mine,combined with theoretical analysis and numerical simulation,the article researched the stress distribution rule of stope surrounding rock and the characteristics of plastic damage. It also determined the reasonable size of roadway protection coal pillar. The research results provide a scientific basis and reference for the confirmation of the reasonable size of coal pillar for steep coal seam which is used the similar mining method.