Against this context the paper examines main indicators of M statistics in Romanian mining sector. Main indicators of M statistics monitored at national level and used for the analysis are: Severity index (SI) = days number of TIW x 100 / average number of registered employees; Frequency index (FI) = number of initial medical certificates x 100 / average number of registered employees; Average duration index (ADI) = days number of TIW / number of initial medical certificates.