The areas where human beings exploit coal resources in rich coal mining areas are generally divided into underground coal mines and open-pit coal mines. When the coal seam is far away from the surface, it is generally chosen to dig tunnels underground for coal mining, which is an underground coal mine. When the coal seam is close to the surface, it is generally chosen to directly peel off the topsoil to dig coal. This is an open-pit coal mine. Most coal mines in China belong to underground coal mines.
Extended data:
Influence of coal mine on health;
Chronic lung diseases such as pneumoconiosis were once very common among miners, which shortened life expectancy. In some mining countries, pneumoconiosis is still common; There are about 4,000 cases of black lung in the United States every year (about 1.5 million of them are former miners), while there are about 1 10,000 new cases in China every year.
Environmental impact of coal mine:
Coal mining has many effects on the environment. Open-pit coal mines make the land unusable. Acidic mine water produced by coal washing plant may seep into rivers, causing ecological pollution or adversely affecting human health. Environmental pollution and ecological damage caused by coal mining are increasingly prominent.