综放开采割煤高度与顶煤回收率相互关系研究

摘要

This paper applied numerical simulation to researching caving process of top-coal above powered support and analyzed relationship of mining height and recovery of top-coal under condition of fix thickness of top-coal and 2 different thicknesses. Result showed that mining height was larger; recovery of top-coal was higher. Full-mechanized caving mining with large mining height was good for increasing resource recovery in extremely thick coal seam.%采用PFC数值分析程序对综放开采支架上方顶煤的放出进行了模拟,分析了一定厚度顶煤条件下割煤高度与顶煤回收率的关系以及2种不同割煤高度条件下顶煤回收率与顶煤厚度的关系.模拟结果表明,割煤高度越大,顶煤回收率越高,大采高综放开采有利于提高特厚煤层工作面资源采出率.