1, coal mine work permit: it is the identification of coal miners, including name, gender, date of birth, ID number, type of work, work unit and other information.

2. Health certificate: it is the health certificate of coal miners, which requires regular physical examination to prove that their health meets the requirements of coal mine work.

3. Safety production assessment certificate: it is the safety production certificate of coal miners, who need to participate in safety production training and examination to prove that they have knowledge and skills in safety production.

4. Employment Certificate: It is the employment certificate of coal miners, and they need to participate in job training and examinations to prove that they have the corresponding skills and abilities before they can work.