1. Occupational risk: Coal mine work is a high-risk occupation, which needs to face various dangerous factors such as explosion, collapse and coal dust explosion, and needs to have a high degree of safety awareness and emergency handling ability.

2. Work intensity: Coal mine work is heavy physical labor that requires standing, bending and carrying heavy objects for a long time, and requires strong physical strength and endurance.

3. Environmental conditions: The working environment of coal mine is relatively harsh, and it needs to work in dusty, high temperature and humid environment, so it has adaptability.

4. Salary: The salary of coal mine work is relatively high, but factors such as work intensity and occupational risks need to be considered.