摘要
通过对尘粒起动风速与尘粒粒径之间关系的研究,认为可以通过加速粉尘颗粒凝聚,从而生成大尘粒的办法来减少爆破拆除中的扬尘。通过对尘粒间物理凝聚力的大小及其生成条件的研究,发现在干燥情况下促使尘粒凝聚的主导作用力是范德华力;在湿润条件下促使尘粒凝聚的主导作用力是液体桥联力,并且液体桥联力比范德华力要大得多。因而认为用物理方法创造液体桥联力发挥作用的条件,生成大而牢固的尘粒,减少爆破拆除中的扬尘是合适的。通过对尘粒间化学作用力的研究,认为用化学方法增大尘粒间的凝聚力,减少爆破拆除中的扬尘是可行的和重要的。用现场实践数据支持了上述结论。
Based on analyzing the relationship between the dust size and the starting wind velocity, the conclusion is drawn that flying dust induced by blasting demolition can be reduced by enlarging the dust-particle size. Through analyzing of the physical cohesive forces and their occurring conditions among dust particles, it is found that the main acting force among dust particles is the Van der waals force under the drying condition and the liquid-bridging force under the wetting condition, and the latter is rather stronger than the former. It is believede that facilitating dust-particle cohering for enlarging dust-particle size by physical methods is rational in order to reduce blasting demolition dust. Further, the feasibility and importance of dust suppression by chemical measures to strengthen cohesive force among dust particles are emphasized in blasting demolition. The conclusions above are verified by experimental data in situ.
出处
《爆破》
CSCD
2005年第4期14-17,共4页
Blasting
关键词
降尘
粉尘凝聚
扬尘
爆破拆除
dust suppression
dust cohesion
flaying dust
blasting demolition
