System for Improving Environmental Conditions in Deep Quarries

Goal. To reduce the level of adverse factors in the air at quarry working benches by using localized ventilation systems powered by alternative energy sources. Research methods. Theoretical substantiation of the system configuration and approximate parameters of the components of a localized ventilation system for quarries. Scientific novelty. For the first time, a system is proposed that extracts polluted air from the quarry recirculation zone, partially cleans it, and subsequently disperses it outside the quarry, using solar energy to generate airflow in a ventilation duct. Practical significance. The results can be applied in the design and modernization of localized ventilation systems in deep quarries to reduce gas and dust concentrations in working areas, which will lower energy costs, reduce greenhouse-gas emissions, improve occupational safety, and decrease anthropogenic impacts on the environment. The results. A mobile localized ventilation system for deep quarries based on solar-induced buoyancy-driven draft is developed and theoretically substantiated. Analytical relationships are obtained to estimate airflow velocity and pressure depression in the ventilation duct, and the effectiveness of reducing gas and dust concentrations in working areas is demonstrated. The proposed solution shows potential to improve environmental and occupational safety while reducing energy consumption.