综放工作面顶煤放出规律研究

Research on Top Coal Caving Law of Fully Mechanized Caving Face

为了研究顶煤的放出规律,结合放顶煤的特征,建立了顶煤流动一般模型。在散体移动规律的基础上,结合顶煤放出的特点,对方差进行了修正,并引入了流轴,得出了顶煤颗粒移动概率密度方程。通过计算,逐步得出了顶煤颗粒移动速度、迹线、漏斗、以及顶煤放出体方程,并用matelab软件对进行绘图,直观地反映出了顶煤流动规律。顶煤颗粒的移动迹线介于直线和抛物线之间。放出漏斗随放出量的增大而逐渐变化,从移动漏斗逐渐变化为降落漏斗、破裂漏斗。顶煤的放出体形态类似于半个倾斜的椭球体,而又不同于椭球体。

A general model of top coal flow has been established to study the flow rule of top coal based on the characteristics of top coal. Top coal release equation and the movement velocity, trace, funnel of top coal particles have been obtained by calculation, top coal caving law has been revealed by drawing with MATELAB software. The achievement of these results further enriched the theory of top coal caving.