When the swelling areas between two cutters are superimposed, the deformed rocks are separated from the face. 当相临刀具诱发的隆起区重叠时，岩石便以碎块的形式脱离掌子面。
Tunnel refection seismology employs sources and receivers that are mounted inside the tunnel wall or tunnel face and aims to predict rock properties ahead of the tunnel. 摘要隧道反射地震法是利用放置在隧道边墙或者掌子面内的震源和接收器，来预测隧道前方的岩石特性。
