... driving（progress）rate，进尺率 easer，掏槽孔 erecting supports for the roof and side wall，对顶拱及边墙进行支护 ...
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介绍了爆破一次成井技术在漂塘钨矿的应用实践，提出了爆破一次成井的掏槽方式，爆破参数的设计计算方法和炮孔的施工要求。
The undermine method of well drilling technology once of blasting is put forward as well as the calculation of blasting parameters and the demand of implementation for hole.
对直线掏槽的炮孔布置进行了优化设计。
The cutting holes layout for straight cutting has been optimized.
为了考查无空孔直眼掏槽爆破参数，采用数值模拟方法研究单自由面垂直炮孔的爆炸作用问题。
To investigate the parameters of parallel cut blast without empty holes, an advanced numerical method is used to study the explosion effect of charge in hole perpendicular to a free surface.
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