8Heidari M,Tonon F.Ground reaction curve for tunnels with jet grouting umbrellas considering jet grouting hardening[J].International Journal of Rock Mechanics and Mining Sciences,2015,76(6):200-208.
9Aksoy C O,Onargan T.The role of umbrella arch and face bolt as deformation preventing support system in preventing building damages[J].Tunnelling and Underground Space Technology,2010,25(5):553-559.
10Schumacher F P,Kim E.Modeling the pipe umbrella roof support system in a Western US underground coal mine[J].International Journal of Rock Mechanics and Mining Sciences,2013,60(6):114-124.
