The most common one was/is 'Brown Lung" from breathing coal dust for too long.
Black lung disease: A chronic occupational lung disease contracted by the prolonged breathing of coal mine dust. The silica and carbon in the coal dust cause black lung disease. About one of every 20 miners studied in the US has X-ray evidence of black lung disease, a form of pneumoconiosis.
Wyoming produces the most coal of any state.
Sadly unless it us a union mine (there are very few now) coal miners don't get retirements, barely even benefits.
For a time in the US history of coal mining, many of the miners lived on coal company property. This was especially true among the coal mining companies in West Virginia.
Depths of coal seams vary from place to place. The first coal mine in the US was in Midlothian VA, near Richmond. Coal was present on the surface- just pick it up. Later mines in that area were about 360 ft deep. Other mines are deeper- but much coal is still mined from the surface in high wall or long wall mining.
Mostly due to the stressers associated with modern life.
Thousands.
The US has one of the richest beds of fossil fuels, namely bituminous coal. The geological region called The Pittsburgh Coal Seam extends through many States, including PA, WVA, OH, IN, ILL, and KY. Bituminous coal is a cheap fuel that burns hot. It was used exclusively in home / business heating (coal furnaces), and coal or coke (made from coal) fueled Mills and Factories. The US also has a seam of anthracite coal, which burns less hot and is less preferred over bituminous coal.However, burning coal is dirty. It produces air pollution that contains numerous chemicals. The coal dust from burning the coal can exist in homes/buildings for a century or longer. Coal dust leads to or aggravates many lung diseases. It is a risk to public health, as well as the health of the planet. Social-health concerns often conflict with political concerns, especially in States and Districts that have a high percent of coal miners. Workers risk losing their jobs if society turns away from coal as fuel.
The US still has large coal deposits.
Yes, coal is found in Wyoming. Wyoming is the number one producer of coal in the US, with about 40% of the coal in the US coming from Wyoming.
The US had an abundance of coal and natural gas. It is estimated that 50% of the electricity generated in the US was from coal through burning fossil fuels.
On June 1, 1943, the United Mine Workers (UMW) went out on strike. Led by John L. Lewis, the strike was a response to coal mines being seized by the US government during World War II. The UMW demanded higher wages and improved working conditions.