Affiliation: | 1. College of Resource and Environment Engineering, Liaoning Technical University, Fuxin 123000, China; 2. School of Resource and Environment Engineering, University of Science and Technology, Beijing 100083, China; 3. Research Center of State Administration of Work Safety, Beijing 100013, China; 4. College of Economical Management, South China University of Tropical Agriculture, Danzhou 571737, China |