1·Making pit geology work well is the basic security of realizing coal mine safety. It's very important to prevent from main calamities such as water fire gas and roof.
搞好矿井地质工作，是实现煤矿安全生产的基本保障，对预防水、火、瓦斯、顶板等主要灾害有着极为重要的意义。
2·The basic principle and design method on the hole by hole blasting technique are described, and the practical result of this technology in domestic open-pit mine are introduced.
介绍逐孔起爆技术的基本原理、设计方法以及逐孔起爆技术在露天矿山生产中的良好效果。
3·In the boundary of open-pit, characteristic division of mine can be treated as working grid, working grid and mine boundary grid are the basic grid.
在矿界内把露天矿区的特征分区看作一个工作网格，工作网格结合矿界就构成了矿区的基本网格。