Numerical simulation of water yield of mine based on artificial descending flow field

In order to accurate, predict the west limb normal water yield of mine of Siwan mine in Hebi under futural dewatering conditions, three descent progress of unsteady flow dewatering test is designed and successful experimentized. The test identifies the hydrogeologic conditions and the dewatering quatity of the second layer limestone aquifer (LA confirms that the F-8 fault in the eastern part of well field is a water conductive fault, the second layer limestone karst water of the west limb accept the Ordovician limestone karst water of the east limb by lateral runoff. Based on mass experimental data and combined with hydrogeological conditions and the aquifer space structure of the study area, Taking Visual MODFLOW software as application platform, a three-dimensional seepage simulation model is established. By the model, each of the observation boreholes descending water level and terminal time descending flow fleid of each descent progress in the dewatering test are simulated successfully, these ulteriorly identifies that the F-8 fault is a water conductive fault, also prooives that the hydrogeological generalization of the study area and the model parameters setting are reliable. That the normal water yield of mine was 1,400 m(3)/h on the simulation model has been predicted. It offers scientific gist to enlarge and recreate water drainage system and drain sump of Siwan mine in the future.