软土中的机械预切槽法是超前支护的一种，在预筑拱的保护下可以安全高效地开挖隧道。
The Mechanical pre-cutting method used in soft ground is a kind of preparative support, it allows tunnel excavation work to be conducted efficiently under the safe pre-lining.
利用断裂力学原理阐明了切槽爆破机理，提出了切槽预裂爆破的刀具参数，依据现场初步试验成果指出了下一步应改进的切槽刀具参数。
The notch blasting mechanism is expounded by the fracture mechanics principle, the cutting tool parameters for notch presplitting blasting is put forward.
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