Research on calculating method of residual subsidence of longwall goaf
Abstract：On the basis of analyzing the mechanism of residual subsidence of old goaf,the model of calculating residual subsidence of gobs was deduced by combining the results of ruptured rock mass.Meanwhile the relationship were analyzed between the coefficient of residual subsidence and the characteristic of overburden strata,mining thickness,mining depth and building load.The research results show that while mining thickness is same,the shallower mining depth is,the larger coefficient of residual subsidence is,and there is larger surface residual subsidence in the future;While mining depth is same,the larger mining thickness is,the smaller coefficient of residual subsidence is;When the propotion of constuction loads to overburden stress is the same,the smaller the mining depth is,the larger the augmenter of subsidence coefficient is,and has more effect old goafs.
Keywords：longwall miningold goafresidual subsidencemechanismresidual subsidence coefficientevaluation of stability
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 1601-1605 )