Cleated coal
Cleated coal is not a separate type of fuel but a descriptive term used by geologists and mining engineers to refer to coal seams that contain a well-developed system of…
Fractured coal
The term fractured coal refers to coal seams that contain pervasive natural cracks, joints and cleats which greatly influence their mechanical behavior, permeability and economic value. Fracturing may be the…
Raw sub-bituminous coal
This article examines raw sub-bituminous coal: its nature, where it occurs, how and where it is mined, its economic and industrial roles, and environmental and policy considerations. Sub-bituminous coal occupies…
The Most Beautifully Restored Coal Mines in the World
The journey from deep beneath the earth’s surface to transformed landmarks of culture and recreation illustrates a fascinating story of Coal. Once synonymous with industrial prowess and economic growth, abandoned…
Raw lignite
This article explores raw lignite — a low-rank form of coal commonly called brown coal — examining its geological origins, where it is found and mined, its role in modern…
The History of Coal and Its Role in the Industrial Revolution
Coal has played an indispensable role in shaping modern civilization, driving the wheels of the Industrial Revolution and powering economies around the globe. From the earliest discoveries of this abundant…
Culm coal
Culm coal is a term with several regional meanings, but it generally refers to **fine**, **waste** or low-grade coal material associated with mining and processing. This article reviews the nature…
Pea coal
Pea coal is a widely recognized commercial grade of coal valued for its convenient size and versatile uses, especially in household heating and small industrial applications. This article examines what…
Coal dust
The following article explores the subject of coal and coal dust from geological occurrence to industrial applications, economic significance, and health and environmental implications. Coal remains one of the world’s…









