Optimization of support parameters of return air roadway on working face of Ruineng Coal Mine
In order to optimize the supporting parameters of the cross-fault return air roadway of the working face of Ruineng Coal Mine,the numerical simulation method was used to analyze the mine pressure parameters under different support meth-ods.Firstly,the supporting parameters of the original return air roadway were analyzed,then the mine pressure of different advanced working faces was analyzed,and the mine pressure at 5 m of the advanced working face under the original support conditions was analyzed.Finally,the mine pressure analysis of different support schemes was carried out,and the optimized support parameters of the return air roadway were determined.The results show that considering the safety,economy and on-site construction conditions,the reinforcement support scheme is determined as follows:when the roadway passes through the fault,one anchor cable of φ17.8 mm × 11 600 mm is added to the fault with the interval of 1600 mm,and three DW30-250/100 single hydraulic pillars with spacing of 1200 mm were installed to one section,achieving a better support effect.
return air roadwaysupport parameterssupport optimizationmine pressure
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