Optimization Transformation of High Drainage System Roadway in Mining Face
As one of the main measures for gas control in working face mining,high drainage roadway should be provided with a system roadway connected to the entrance and exit roadway of the mining area.Based on comprehensive consideration of factors such as gangue discharge,material transportation and excavation,local ventilation fans,air ducts,belt conveyors and other equipment and facilities should be installed during excavation,and gas extraction pipelines should be laid during mining.If the roadway design of the high pressure drainage system is not reasonable,there will be hidden dangers such as insufficient safety spacing,unstable ventilation system,electrical equipment in the full pressure return air flow,large air leakage from the closed wall of the high pressure drainage roadway,and increased difficulty in gas control and fire prevention management in the goaf.The optimized high pressure pumping system roadway was constructed upward along the opening of the main track roadway in a stable rock stratum,and was connected to the main return air roadway of 15#coal seam.The high drainage system roadway was arranged with intake and return air roadways.The optimized high pressure drainage system roadway has the advantages of small parallel wind resistance,small air leakage in the high pressure drainage roadway,independent gangue and material transportation systems,fewer ventilation facilities,independent ventilation system,independent extraction system,and no electrical equipment in the full air pressure return air flow,which provides a good safety guarantee for gas drainage and fire prevention during and after mining of the working face.
high drainagesystem roadwayoptimization transformation
NETL
NSTL
万方数据
