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    Research on Coal Pillar Width in Roadway Driving Along Goaf Based on The Stability of Key Block

    Zhengzheng Cao1, Yuejin Zhou1,2

    CMC-Computers, Materials & Continua, Vol.48, No.2, pp. 77-90, 2015, DOI:10.3970/cmc.2015.048.077

    Abstract Reasonable width design of narrow coal pillar is the key for ensuring stability of surrounding rock in the roadway driving along next goaf. Based on movement characteristics of overlying strata in gob-side entry, the paper establishes the mechanical model of surrounding rock structure for roadway driving along next goaf, and analyzes the interaction mechanism between key blocks and coal pillar. Besides, in allusion to the mechanical equilibrium of key block B in basic roof, the stability coefficients K1 and K2 of key block B and sensitive coefficient of influencing factor are introduced. When the stability coefficient K1 is… More >

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