Abstract
Experimental study of the multicriterial electrooptical system operation was carried out when control pre-emergency and emergency situations in the form of methane contamination, dustiness and fire. Experimental setup and methodology were developed to study the applicability of approaches to placement of methane and coal dust concentration sensors. Experimental setup and methodology were developed to study the applicability of approaches to placement of CO and CO2 concentration sensors and flame sensors at fire detection. The experimental data are in satisfactory agreement with the simulation results on change in the concentration of methane, coal dust and combustion products (CO, CO2) along the length of setup. This allows using the approach to adaptation of system to protected object in the form of blind drift based on computer simulation. The choice of locations for methane and coal dust sensors under the roof of blind drift at the distance of 3 to 5 m from active face is substantiated by the results obtained by experimental setup on the scale of 1:6 to mine. Fire detection can be performed both upon reaching the maximum permissible concentration of CO, and in the complex control by exceeding the CO/CO2 ratio of 0.03. CO and CO2 sensor locations are selected centrally under the roof of the mine, as close to the roof. The CO and CO2 sensors are placed in pairs in complex control. Flame sensors are oriented along the blind drift. Flame sensors are placed close to the possible ignition site taking into account the effect of radiation attenuation by combustion products.
Published Version
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