This book focuses on the mechanical properties and permeability of coal, and the gas flow in coal seams. Based on coal permeability models, it establishes different models for coal seam gas, from the linear flow model to the gas-solid coupling flow model. It also provides the theoretical basis for the exploitation and safe production of coal as well as coal seam gas resources. As such, it is a valuable reference for researchers, advanced students and practitioners working in mining engineering and coalbed methane engineering.

This handbook mainly introduces the diagnosis and treatment methods of COVID-19 in traditional Chinese and Western medicine. In particular, principles for clinical treatments, therapeutic methods and prognostic rehabilitation interventions for the four types of clinical manifestations are elaborated. A chapter detailing guidance for healthy individuals on scientific prevention measures is also included, making this book suitable for not only frontline COVID-19 personnel and TCM enthusiasts, but also the general public.

This book focuses on the mechanical properties and permeability of coal, and the gas flow in coal seams. Based on coal permeability models, it establishes different models for coal seam gas, from the linear flow model to the gas-solid coupling flow model. It also provides the theoretical basis for the exploitation and safe production of coal as well as coal seam gas resources. As such, it is a valuable reference for researchers, advanced students and practitioners working in mining engineering and coalbed methane engineering.