急倾斜顶底板处顶煤放出规律研究

论文对急倾斜水平分段放顶煤顶底板处的顶煤放出进行了试验研究,分析了三角煤损失及煤岩分界线的状态,以底板三角煤采出率的大小为依据,对合理顶煤分段高度的取值及合理放煤支架位置的布置进行了研究;以顶板处放煤后煤岩分界线的状态为依据,对顶板影响区的顶煤放出提出了放煤时间控制放煤口何时关闭,而非见矸关门。

Study on top coal caving below roof and floor in steep seam

This paper has studied the top coal caving below roof and floor for horizontal section top coal caving in steep seam,and has analyzed the losing of triangular coal below roof and floor,and has researched the boundary state between coal and rock.Thereby,based on the caving radio of triangular coal below floor we refer to how to set rational sublevel height of top coal and how to enactment the position of support.Furthermore,based on the boundary state between coal and rock,we put forward the principle of top coal caving that is use time to control close and open the exit of coal caving,this principle is differ to that principle of which close support exit when meet the waste rock.All the study can offer rational parameter for horizontal section top coal caving in steep seam.