What are the two methods of coal mining?

Underground coal mining, open-pit coal mining.

1. Underground coal mining: Underground coal mining refers to coal mining in underground mines. This method needs to build a mine and transport workers and equipment to the underground position of the coal mine through the shaft. Underground coal mining is divided into different specific methods, such as fully mechanized mining method, longwall mining method and room and pillar mining method. The choice of different methods depends on the geological conditions and recoverable reserves of the mining area.

2. Open-pit coal mining: Open-pit coal mining refers to coal mining on the surface. This method is suitable for open-pit coal mines. Generally, there is no need to build a shaft, and coal mining operations are directly carried out on the surface through mining machinery. Open-pit mining methods include open-pit mining, open-pit mining and comprehensive mining. Land reclamation and environmental protection are usually needed when mining open-pit coal mines.