Análise ergonômica do trabalho no setor de mineração: um estudo de caso sobre o posto de operador da ensacadeira

Abstract

The intensification of production processes in the mining sector has increased workers' exposure to biomechanical overloads and repetitive strain. This study aimed to conduct an Ergonomic Work Analysis (EWA) of the bagging machine operator workstation at a mining company located in Jaguaruana, Ceará. The methodology consisted of an applied case study based on direct observation, time-motion analysis using Kinovea software, postural assessment via the REBA (Rapid Entire Body Assessment) method, and the application of the Nordic Musculoskeletal Questionnaire. The results revealed a significant discrepancy between prescribed and actual work, with the operator subjected to high operational intensity conditioned by the pace of the bagging machine. Postural analysis showed that 66% of the analyzed activities present a high or very high ergonomic risk, with REBA scores reaching critical values of 11 and 13, particularly in postures of extreme trunk flexion during the handling of 25 kg loads. These findings converge with the reports of lower back pain identified in the Nordic Questionnaire and the frequent use of medication. It is concluded that there is an immediate need for ergonomic interventions, such as the implementation of load-lifting devices and the reorganization of break schedules, aiming to preserve the physical integrity and occupational health of the worker.