rock grain

The results show that the suspended particles in mine drainage mainly consist of coal and rock grains with small size and negative electric .

研究发现:矿井水所含悬浮物主要是粒径较小的煤粉和岩粉,而且表现出不同程度的负电性,自然沉降比较困难。

Based on comprehending profoundly the actuality of the isolated blast establishment and linking to the practice condition of the production overall arrangement and the exploitation term in the local mine,so the essential need,method and characteristic of the installation about the isolated blast water bottle and the rock powder shed suit to the local mine are expatiated.

通过对地方煤矿隔爆设施现状的深入了解,结合地方煤矿生产布局和开采条件等实际情况,阐述了适合地方煤矿的隔爆水袋和岩粉棚安装的基本要求、方法及特点。

Investigation on pozzolanic activity of perlite powder;

珍珠岩粉火山灰活性研究

Estimating formula for strength on concrete mixed with perlite powder;

掺珍珠岩粉混凝土的强度估算方程

Structure modification and application of oil shale powder;

油母页岩粉体的结构改性及其应用