极近距离煤层合层综放工艺参数研究

Study on the Technological Parameters of Full-mechanized Caving of the Close Distance Seam

官地矿下组8、9号煤层间距较小,属于极近距离煤层,在29401工作面,煤层间距平均仅有0.8m,决定采用合层综放的方法对煤层进行回采。本文根据工作面实际情况,利用破坏系数法,对顶煤冒放性进行合理预测,并对放采比、支架阻力、放煤步距等工艺参数进行优化,为相似条件下含夹矸煤层的综放开采提供参考。

The spacing of 8、9# coal seam in Guandi Coal Mine is small, belonging to the very close distance coal seams, and in 29401 working face, coal seam average spacing is only 0.8m, so we decided to adopt layer of sublevel caving method for mining of coal seam. In this paper, according to the actual circumstance of working face, we used the method of damage coefficient, reasonable projections for top coal caving characteristics, and analyzed the infuence of mining height, the support resistance and the interval optimization for the caving characteristics, providing reference for full-mechanized caving mining of thick coal seam under similar conditions.