Special emphasis is given to the constitutive behaviour of rock material, including rock mechanics and partial saturation, chemo-mechanics, thermo-hydro-mechanics, weathering and creep. Theoretical concepts, laboratory and field experiments and numerical simulations are discussed. Multiphysics coupling and long-term behaviour has practical applications in a number of areas. In oil engineering (enhanced oil recovery, CO2 injection, and well stability); in underground waste storage, post-mine behaviour and the long-term behaviour of railway and road infrastructures. This book will be useful to professionals and academics working in a variety of fields related to rock mechanics and environmental geotechnics.