煤散体安息角受粒径大小的变化研究

Study on the Change of Relaxation Angle of Coal Particles Affected by Particle Size

为了探究煤散体自然安息角与粒径的变化关系,本文采用圆筒法对不同粒径的煤散体做了实验研究。将四种不同粒径的煤散体分别装入圆筒中,缓慢垂直向上移动圆筒,使散体自然堆落,测量煤散体堆积体的高度h与水平距离l,通过公式计算出安息角的大小。研究表明,煤散体自然安息角受粒径的大小呈现出随粒径增大,自然安息角逐渐变小的趋势。

In order to explore the relationship between the natural rest angle and the particle size of coal particles, an experimental study of coal particles with different particle sizes was conducted in this paper. Four kinds of coal granular bodies with different particle sizes are loaded into the cylinders respectively, and the cylinders are slowly moved vertically upwards so that the loose bodies fall naturally. The height h and the horizontal distance l of the coal bodies are measured and the angle of repose is calculated by the formula. Studies have shown that the natural rest angle of coal particles is affected by the size of the particle size, and the natural repose angle gradually becomes smaller with the increase of particle size.