Study on advance hydraulic powered support and surrounding rock coupling support system and suitability

In order to solve the support problems of the dynamic gateway within the mining stress influence scope of the coal mining face,the numerical simulation and the sie montoring and measuring combied study means were appied to analyze the mining stress infuence scope and distrbuton law.The infuence scope of theadvance support pressure measued in the gatevay retained along the goaf of the tuly mechanized top ceal caving minin face in the deep section of Dongta Mine, was 45 ~ 68 m. The advance infuence distance of the large cross secion roadwva withthe hard completed surounding ock in 'usen Mining Area wa 203~ 30 m and the relative serious infuence se ction were within 20 m.A low intal suppor and high working resistance,non equal strength couping support idea and advance suppor design principle and method were provided.W ith the concav-convex beam stucture,the increased step distance of the powered support moved forward,the powered support moved fonward with the pressurized and frictional canopy.altenative walking moved forward.added powered supors adjusting nechansmn and other measuresthaadvance enhanced suppor system and thebofi-seel mesh-anchor suppor system coud be ifited,thus coud relize the strength coupling with the surounding rock,thestructure coupling and the stability coupling,.the system sutaolity could be enhanced and the coordinative suppor target could be reached.A seriesof the advance hydraulic powered support was researched and developed to suit d ferent mining techncal co dtin and different mining nethod and were promoted and aplied to several mining areas with excellent application results.