In the world of underground mining, safety is not an option it’s a necessity! After blasting operations, the work environment must meet international standards to ensure worker safety. Oxygen Level: Must be between 19.5% and 23% to ensure proper breathing. Carbon Dioxide (CO₂): Should not exceed 0.5% to avoid suffocation risks. Carbon Monoxide (CO): Less than 25 ppm, as it’s highly toxic even in small concentrations. Methane (CH₄): Less than 1% to prevent explosion hazards. Airflow Speed: Should not be less than 0.3 m/s to ensure sufficient ventilation and air distribution. Temperature: The maximum safe working temperature is 35°C, considering humidity levels. Regular gas monitoring and proper ventilation are the first lines of defense to protect everyone working in this field.