With the development of infrastructure construction all over the world, many tunnels are constructed in high-altitude and deep-buried areas. There will be geothermal and groundwater seepage problems in the process of tunnel construction. The physical and mechanical properties of rock mass will change significantly under hygrothermal conditions, and the hydro-thermal-mechanical coupling mechanism of rock mass is complex. High strength rock mass will also show the engineering properties of soft rock under multi-field action, which brings great trouble to engineering construction. Therefore, it is necessary to study the coupling mechanism of hydro-thermal-mechanical of rock mass under hydrothermal conditions.

The Sichuan Tibet high-speed railway lines pass through a large range of unfavorable geological zones. The in-situ stress in these areas is extremely complex, and there are also serious problems of high temperature and high humidity. High speed railway tunnel has very strict requirements on deformation, and the surrounding rock and supporting structure need to maintain millimeter deformation under the conditions of high temperature, high humidity, and complex in-situ stress. Therefore, it is urgent to explore the deformation mechanism and mathematical problems of rock mass under multi-field coupling, and the interaction mechanism between the supporting structure and rock mass. In the future development, this study can provide a certain theoretical basis and practical experience for the construction of infrastructure projects in complex geological areas. At present, there are relatively few studies on the damage mechanism and mathematical problems of rock mass under hydro-thermal-mechanical multi-field coupling.

The Special Issue aims at providing a platform for publishing original articles and review articles, introducing the latest hydro-thermal-mechanical multi-field coupling mathematical theory and cutting-edge engineering problems and solutions.

Potential topics include but are not limited to the following:

• Multi-field coupling mathematical theory of rock mass under complex environment
• Field experiment or physical model experiment of rock mass under the complex hydro-thermal-mechanical environment
• Advanced numerical simulation and mathematical methods aimed at rock mass under multi-field coupling environment
• Research and case analysis of rock mass supporting method under the hydro-thermal-mechanical condition
• Other technical methods and equipment for dealing with hydro-thermal-mechanical multi-field coupling effects
• Corrosion mechanism and prevention measures of anchor cable and other supporting systems under multi-field conditions
• Constitutive mathematical model of reinforced rock mass under multi-field conditions