Analysis and evaluation of deformation influence of underlying goaf on highway based on FLAC3D and probability integral method
There is a municipal secondary highway above the working face of S3102 of a certain mine,and the mining of the working face has caused part of the highway surface to subsidence and collapse damage.In order to accurately evaluate the degree of highway dam-age,the FLAC3D numerical simulation method and probability integral method were used to predict and calculate the ground surface movement deformation respectively,and the calculation results were compared with the measured data.The results of FLAC3D numerical simulation and probability integral method showed that the maximum sinking value of highway surface was 4 979 mm and 4 880 mm re-spectively,which was very close to the maximum sinking value of 4 870 mm of the measured highway surface,and the maximum error was about 2％.The results show that it is feasible to use three-dimensional numerical simulation software simulation and probability in-tegral method to study the deformation law of land movement affecting land surface in complex goaf,which can accurately predict the surface movement deformation situation.It can provide technical support for the assessment of land surface stability in goaf and serve as a reference for similar mining area road collapse prediction research.
FLAC3Dprobability integral methodsurface movement deformationstability assessment
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