Use of reservoir simulation and in-mine ventilation measurements to estimate coal seam properties

Methane is a safety concern in underground coal mines. In its explosive range of 5%-15% in air, methane can be easily ignited in the presence of an ignition source to create a violent methane explosion. Ventilation is the main control mechanism to keep methane levels below the explosive limit. However, effectiveness of a ventilation system is dependent on multiple factors such as geological conditions, mine design, and reservoir properties of the coal seam. Without good knowledge of these factors, methane emissions can still create a localized zone of high methane concentrations in areas of low air velocities and quantities, and can render the ventilation system ineffective. Among those factors controlling methane emissions, reservoir properties of the coal seam are particularly important, especially if the mined seam is the main source of methane, with the properties of the coal controlling methane storage and emission potential during mining operations.