During this study, we used the professional risk, pension service and financial sheets of two directorates of the National Institute of Social Welfare of Haut-Ktanga for the study of different variables. In total, we analyzed 251 cases and of which the year 2012 recorded more accidents at work than other years, ie 32.3%. The male sex represents 92.8% of the accidents at work. The married are the most rugged, almost 95%. The seniority range from 2 to 7 years is the most accident-stricken with 38.2% of cases. The mining sector is the most rugged sector with 70.1%. Married people are the most rugged, about 95% of the population of our study. The seniority period ranging from 2 to 7 years experienced many more accidents, ie 38.2% of the cases. The mining sector is the most rugged sector with 70.1% and the miners are the most rugged of our study with 52%. The total costs of care and compensation have increased overall over the 2008-2012 period with a peak in 2010 of more than 250 million CDF. On the other hand, the compensation costs do not depend on the accident sector, the places where the accidents occurred and the age of the victims.

In this study, we used the Karasek questionnaire for a sample of 338 workers, including 258 classified workers and 80 unclassified workers. By studying the descriptive variables to which we added the addictive behaviors that are the consumption of alcohol and tobacco, we arrived at the following results: A "low social support" is perceived by 83% of the classified, 84.6% have a seniority of at least 5 years and 83.1% are affected in the sectors of the mining operations. "Low decision latitude" is perceived by 91.8% of the classified, 89.9% of the workers whose seniority in the company is at least 5 years at most and 97.3% of the workers working in the sector mining operations. A strong psychological demand is reported by 84.8% of classified workers, 84% with a seniority of at least 5 years and 86.8% of workers in the mining extraction sector. The perception of low decision latitude is influenced by professional status and by industry. Classified workers report low latitude 2.5 times more than their unclassified counterparts. The perception of low decision latitude is not influenced by the seniority of the workers within the company.