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房式采空区下特殊岩梁结构支架工作阻力分析.pdf

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房式采空区下特殊岩梁结构支架工作阻力分析

34 10 Vol.34 No.10 2015 10 Chinese Journal of Rock Mechanics and Engineering Oct.2015 12 12 12 12 12 (1. 1000132. 100013) 31201 3 3 3 TD32 A 2015 SUPPORT RESISTANCE ANALYSIS FOR SPECIAL ROOF STRUCTURES UNDER ROOM MINING GOAF 12 12 12 12 12 WEI Like ZHANG Bin FU Xingyu WANG Yin LI Hongjie (1. Mine Safety Technology Branch China Coal Research InstituteBeijing 100013China 2. State Key Laboratory of Coal Mining and Clean UtilizationChina Coal Research InstituteBeijing 100013China) Abstract A single rotary rock block model with the revised step voussoir beam was proposed and a formula calculating the working resistance was established. For the roof structure of the shallow fully-mechanized face i.e.31201 working face of Shigetai coal mine in Shendong mining areathree different conditions according to the overlying coal seam which was the solid coalor the room and pillar goaf or the concentrated pillar in room and pillar goaf were considered so that the roof structures were proposed as a voussoir beam-single rotary rock blocka slight dislocation voussoir beam-single rotary rock block and a severe dislocation voussoir beam-single rotary rock block respectively. The mechanical model of the single rotary rock block was used to calculate the working resistance of support under different roof conditions in Shigetai coal mine. The results showed that the working resistances calculated with the model