Hanging arch是什么意思

用法例句

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。