Abstract
Taking mining region No. 3 of Danhou Coal Mine, located in Yu County in Hebei Province, as the engineering background, the 3D visual model with three aquifers of mining region No. 3 was generalized and constructed by using SURPAC software based on the geologic drilling datum. Then 3D numerical model and its meshing were completed with the MIDAS/GTS-FLAC3D coupling modeling technique. Considering the complicated hydrogeological and mining conditions, two practicable mining sequences to No. 5 & No. 1 coal seams were designed respectively. Through fluid-solid coupling computation, the response characteristics of deformation field, principle stress field and plastic damage were analyzed during the dynamic mining process, and the mining sequences to No. 5 & No. 1 coal seams were optimized. The reasonable mining sequences provide the basis for mining safety to mining region No. 3.
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