Analysis on Surface Ground Residue Deformation of Old Goaf and Evaluation of Foundation Stability:A Case Study of Pangzhuang Coal Mine in Xuzhou City
In order to reasonably develop the land resources in the upper part of the goaf,taking a certain site of Pangzhuang coal mine in Xuzhou City as an example,this study analyzes the engineering geological conditions and deformation mechanism of the overlying strata in the western part of the study area.Using probability-integral method and mining subsidence prediction system MSPS,the subsidence value,inclination value,horizontal movement value,horizontal deformation value,and curvature deformation value of the surface subsidence in the goaf of the study area are calculated and predicted.The stability of residual deformation,draw contour maps of surface deformation parameters are analyzed and evaluated.The research results indicate that the ground subsidence deformation in the underlying goaf of the study area has become stable,and the residual surface settlement deformation is less than the critical deformation of the building.The depth of the influence of the upper building load deformation in the goaf is greater than the distance from the water conducting crack zone,and it will not directly cause the activation of the old goaf.However,the restoration of groundwater in the goaf may pose a risk of activation,and necessary measures should be taken during construction.
land useold goaffoundation stabilityresidual deformationPangzhuang coal mine
NETL
NSTL
万方数据
