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Hanging arch是什么意思

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1)Hanging arch,悬拱2)suspended arch treatment,悬拱处理3)suspension arch method,悬拱法

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。