Advanced TDLS System for CO2 & Blackdamp Detection in Mines - DoP

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Carbon Dioxide (CO2) builds up daily in coal mines from oxidation of coal, humanrespiration, rock blasting, fires, rotting timbers, etc. Without adequate air ventilation in allareas of the mine to dilute excess CO2, a ”blackdamp” atmosphere can build up where theoxygen level is depleted and CO2 levels can increase up to 20%, creating an immediatehuman asphyxiant risk due to displacement of oxygen. Current electrical gas sensors cannotbe used as fixed sensors in this potentially explosive mine gas environment because of thespark risk. Under this Development of Prototype project OptoSci proposes to produce apractical, intrinsically safe, laser and fibre optic based multipoint CO2 detection system usingthe gas sensor designs & novel signal processing schemes devised under a previous Proof ofConcept project and then field trial the system's performance in a working coal mine.