This book presents a thermomechanical analysis of multiple different rock types around the world, and helps readers in the design of rock structures in extreme heat environments. Specifically, it examines rocks typically used in the design of engineering projects related to geothermal energy projects, underground nuclear waste repositories, underground coal gasification structures, natural gas and oil storage, and many more. Also explained in throughout the text is numerical modeling for structural design for long-term stability. This book will also cover different thermal damage models and thermal cracking analyses relating to crack opening and closure at different stages of thermal treatment.