This article covers the important aspects of coal, a major energy source. It discusses the different types of coal, how it is graded, and how it is mined on a large scale. The authors also look at the geology behind the formation of coal and describe the technology used to mine and process it. Furthermore, the article touches on how coal is transported, tested, and prepared for use. In summary, the research sheds light on the significance of coal as an energy resource, detailing its various types and processes involved in its production and utilization.