“三小”岩巷掘进技术的应用与推广

Applying and popularizing the three smallrockdriftexcavating technology

介绍了“三小”参数的设计原理和它在岩巷掘进中的应用，爆破参数的设计与优化以及技术经济效果等。

The principle for designingthree small parameters and the application to rock drift excavating,the design and optimization of blasting parameters,technical and economical benefits are introduced.