drifting method

基本解释

It is shown that the surrounding rock deformation can be better controlled using the two-side pilot drifting method.
研究结果表明：特大断面大跨度隧道采用双侧壁导洞法施工，能较好地控制围岩变形；
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Based on the theory of rock mechanics and the principle of drifting, the author proposed the suspension arch method of drifting in unstable strata.
本文在总结先拱后墙平巷掘进经验的基础上，根据岩石力学理论和平巷掘进原理，提出了平巷掘进的悬拱法。
The technology of crossing over fault, drifting and actual mining method and plan of crossing over fault at combined mining face under complex geology conditions in Jining No.
介绍了济宁二号矿复杂地质条件下综放工作面过断层技术，掘进和回采对断层的处理方法及回采工作面制定过断层方案的步骤。