1. Faculty of EngineeringChina University of Geosciences (Wuhan) Wuhan Hubei 430074 PR China
2. Engineering Research Center of Rock‐Soil Drilling and Excavation and ProtectionChina University of Geosciences (Wuhan)Ministry of Education Wuhan Hubei 430074 PR China
3. Beijing Key Laboratory of Metro Fire and Passenger Transportation SafetyChina Academy of Safety Science and Technology Beijing 100012 PR China