The dangers of coal mining are the mines can explode. Another danger is the mines could collapse. These accidents can happen from coal mining you can get killed or severely injured.. Mining accidents can have a variety of causes including leaks of poisonous gases such as hydrogen sulfide or explosive natural gases, especially firedamp or methane, dust explosions, collapsing of mine stopes, mining induced seismicity, flooding, or general mechanical errors from improperly used or malfunctioning mining equipment. Use of improper explosives underground can also trigger methane and coal dust explosion. Falls of ground remain the greatest single hazard faced by underground miners. They caused nearly 50% of fatal injuries. The main disease that affects coal miners is called Black Lung it kills 1,500 miners a year. It affects the miners by it clogs up their lungs. Many coal mining accidents have happened in the past years.