In the typical activities of quarries, it is common for the employees to be exposed to diverse risk factors, pertaining to their health or physical integrity. This kind of exposition, in Brazil, entitles these employees to additional payments, defined in law from different technical parameters. The controversies concerning the payment of these premiums between the employers and the employees, like the other conflicts between capital and labor, are solved in Brazil by the Labor Courts, and the forensic expert survey is one of the main tools used by the judges. This study aimed to characterize the unhealthy or hazardous situations in quarries using the forensic expert survey, focusing on the concepts and the legal definitions of the unhealthy or hazardous situations in labor activities, as well as the main aspects of the expert evidence technique and the judicial proceeding. This analysis revealed that most of the functions in quarries mean exposure to hazards, requiring appropriate management