A mining accident is an accident that occurs in the process of mining minerals. Thousands of miners die from mining accidents each year, especially in the process of coal mining and hard rock mining. Most of the deaths today occur in developing countries.
Mining accidents can have a variety of causes, including leaks of poisonous gases such as hydrogen sulphide 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 (such as safety lamps or electrical equipment). Use of improper explosives underground can also trigger methane and coal dust explosions.