254 / 2018-07-31 13:18:45

Investigation of proactive inertisation in longwall goaf of Bulianta colliery-A CFD Approach

CFD, Proactive Inertisation, Spontaneous Combustion, Longwall Goaf

矿山职业健康与环境安全 > 防火

Based on real on-site conditions, a three-dimensional CFD model was developed to study heating evolution in a ‘U’ shape Shendong longwall goaf. The theoretical model incorporated a number of governing equations including low temperature kinetics of coal oxidation, energy and mass conservation, momentum balance, and continuity equation. After the base model (1000m) was validated and calibrated using field gas monitoring data, another model (500m model) was studied to obtain an optimum inertisation plan. Both steady state and transient simulations were conducted to study the flow dynamics of air velocity, oxygen ingress, dispersion of gaseous products and heating evolution in the longwall goaf. Proactive inertisation plans using nitrogen to suppress the onset and development of goaf heatings were studied.