The practices showed that the suspensionarch method of drifting is an effective way of drifting in unstable strata.
实践证明，悬拱法是不稳定岩层中平巷掘进的有效施工方法。
2
Based on the theory of rock mechanics and the principle of drifting, the author proposed the suspensionarch 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。
3
Arch is the opposite effect on the suspension bridge, suspension bridge cables in the freedom of those who provide support force where it is from the bridge pillars at both ends of its fixed upward.