Cours Ventilation des mines I

This document presents a course on underground mine ventilation, emphasizing its critical role in ensuring safety, health, and operational efficiency in subterranean workings. It explains how ventilation dilutes and evacuates gaseous and particulate pollutants produced by drilling, blasting, combustion engines, and transport equipment, while also controlling temperature, humidity, and dust levels to maintain acceptable working conditions. The text outlines the objectives of a ventilation study, including the design of ventilation schemes, gallery dimensions, fan characteristics, possible refrigeration, and airflow scheduling. It introduces key occupational exposure concepts such as short-term exposure limits (STEL), time-weighted averages (TWA), and methods for adjusting 8‑hour exposure standards for extended work shifts. The document then describes the main mine gases (e.g., CO₂, O₂, CO, NOx), their physical properties, exposure limits, sources in mining operations, and physiological effects, highlighting the need for careful monitoring and control through proper ventilation design.