巷道放顶煤顶煤破碎机理研究

Fracture mechanism of roof coal in top caving along with the roadway

在现场试验和观测的基础上 ,应用矿压理论 ,对急斜煤层巷道放顶煤法顶煤的破碎过程进行了分析 ,引进“煤梁”的概念 ,构造了煤梁极限跨度模型 。

Based on the field trial and in site observation, the paper analyses the fracture procedure of roof coal in top caving along with the roadway in steep angle. According to the concept of coal beam, the model of maximum span is suggested. The conclusion is that the rupture process of coal beam under ground pressure is identical to the fracture of roof coal.