With the tracing particles , the sinking velocity of middle and higher density particles that pass through the lower density coal particles in jig bed for different jigging air circle were measured . the results showed that the air cycle with a long inlet period can promote the separation of middle and higher density particles and lower density coal particles 运用彩色人工颗粒，对不同跳汰周期下中、高密度颗粒在低密度煤炭床层中的沉降速度进行了示踪研究，确认长进气期周期有利于中、高密度颗粒与低密度煤炭颗粒的分离。
This paper , as for the contradiction happened in design , construction , acceptance check when the quality of the project was needed and the building speed is different in every section of the road , the residual settlement a h is needed to be less than the standard value , launches the project - - - - - - the analysis on the settling velocity o f high earth fill sub - grade and the study of stability 本文主要是针对近几年来在设计、施工、竣工验收在工程质量评定中所出现的矛盾? ?一条公路少至几公里至几十公里，甚至上百公里，由于各个标段完工速度不一致，其剩余沉降值(即竣工验收时) h要求小于“评定标准” (即垂直变形3cm ) ；而进行的《高填方路基沉降速度分析与稳定性研究》课题研究。
The paper analyses the particle radial separating speed in inertia field and the dropping speed in the gravity field , determines the relations among the separating critical diameter , the rotate speed of screw , airflow speed and the radial size of separating interface , establishes and work out the separating diameter which value the separating effect of the new equipment 根据物料的空气阻力与离心分离理论分析了离心力场中粒子径向分离速度及重力场中的粒子沉降速度，确定分离临界粒径与螺旋转速、气流速度及分离界面径向尺寸等之间的关系建立了并求出了衡量此种新机型气固二相流分离效果的衡量指标? ?分离粒径。
