一、引言 煤矿生产过程中产生的浮游粉尘,是以空气为介质,由粒度、比重、形状均不相同的煤、岩粒子组成的极其复杂的混合体,它们飞扬在矿井空气中。随着粒子的自重及矿井的温度、湿度、井下风速的影响,较大的尘粒沉降在尘源附近,较小的尘粒随风流被带到较远的地方,而微细的粒子在矿井风流中呈气载性质而不沉降。煤矿浮游粉尘中,并不是所有粒度的粉尘都能进入肺部,能进入肺部的只是浮游粉尘中的一部份,即呼吸性粉尘。由于各矿煤、岩的赋存条件,煤、岩物理化学组分和采掘工作的工序,工艺等方面的差异以及采掘工作面位置的变迁等原因, I. INTRODUCTION The planktonic dust produced in the process of coal mine production is an extremely complex mixture of coal and rock particles of different particle size, specific gravity and shape. They fly in the mine air. With the weight of the particles and the influence of mine temperature, humidity and downhole wind speed, the larger dust particles settle near the dust source, and the smaller dust particles are carried far away with the wind flow, while the fine particles flow in the wind In the air-loaded nature without settlement. In coal mine floats, not all particles of dust can enter the lungs, but only part of the floating dust that enters the lungs, ie, respiratory dust. Due to the coal and rock conditions, the differences between the physical and chemical components of coal and rock, the working procedure and technology of excavation, and the change of the location of the mining face,