Research and Practice on Equal Pressure Ventilation Technology Scheme for Coal Mine Working Face
In order to overcome the problems of low oxygen concentration and corner gas accumulation during the mining process of steeply inclined coal seams,a technical method and measurement scheme of uniform pressure ventilation is proposed to ensure the wind pressure balance between the goaf and the working face.After measuring the concentration of various gases in the return air corner before and after uniform pressure ventilation,the actual measurement showed that the CH4 concentration in the return air corner remained approximately 0.15%,CO concentration can be maintained within 0.0024%,O2 concentration can be roughly maintained above 18%,and air leakage can be maintained below 10 m3/min.The pressure equalization system is relatively reliable,ensuring the safe progress of production in the+575 level No.45 east wing working face.
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