充填采煤固体物料垂直投放颗粒运动规律影响因素研究

基于固体充填采煤垂直投放管道内固体物料颗粒的位移、速度、加速度方程,分析得到了固体物料的粒径与密度是影响其在垂直投放系统中运动规律的关键因素,并采用理论分析、MATLAB软件研究了2个关键因素对固体物料垂直下落的影响特征。研究表明,固体物料在垂直管路中做持续的变加速运动,固体物料的粒径、密度越大,则加速时间越长。因此,结合平煤十二矿实际工程条件,选用粒径不大于80 mm矸石投料,固体物料垂直投放系统投料过程中没有出现堵塞现象,并达到500 t/h的实际投放能力。

Influence Factors of Solid Material Particles Motion in the Feeding System of Fully Mechanized Coal Mining and Backfilling

In this paper,based on the solid material particle’s differential motion equations(displacement,velocity,acceleration) in the pipeline of fully mechanized coal mining and backfilling,the particle diameter and density of the solid material are established as the main factors which affect its motion.In addition,the effect characteristics of the two main factors to the particle motions are studied by theoretical analysis and MATLAB software.The results indicate that the solid material particle experiences a varying acceleration motion in the feeding pipeline,and the total acceleration time increase as the particle diameter and density increase.According to the engineering conditions of No.12 coal mine of Pingdingshan Coal Group,the proper diameter of the used solid material particle should be 80 mm,the feeding system has not been blocked heretofore,and the real feeding rate can reach to 500 t/h.