Design on Powerful Advance Support System of Mining Gateway in Fully Mechanized Top Coal Caving Mining Face in Deep Mine

According to the high gateway roof pressure, serious deformation, gateway high advance pressure and deformation range features of the fully mechaniz ed top coal caving mining face in deep mine, the paper analyzed the pressure distribution features and deformation law of the mining gateway in the deep mine and pro vided the effective method to control the serious deformation of the gateway.A two rank and two section type powerful advance support system was researched and dev eloped suitable for the mine long distance and high deformation gateway in deep mine.The paper introduced the main technical parameter determination and main featu res of the advance support system and analyzed the flexibility of the pushing forward mechanism and stabilization mechanism for the advance support system.The adva nce support was applied to the trial in No. 14310 coal mining face in Dongtan Mine of Yanzhou Coal Mining Group and the distance of the advance support was 60 m.Wit h the actual measurements, the average deformation value of the gateway roof and floor was 202 mm and the average deformation value of the two side walls along the gateway was 848 mm.In comparison with the single prop support, the deformation value of the gateway would be highly reduced.With the analysis on the observation re sults of the trial, the support results of the support system would be good, the deformation of the gateway surrounding rock would be less and could meet the requireme nts of the gateway support for the fully mechanized top coal caving mining face in deep mine.