Study On Gushing Water Volume Of An Iron Mine In Anhui Province Based On GMS

The problem of water inrush from mine pits has always been the most problematic problem for mining personnel in mining areas.It directly harms the production safety of mines and the personal safety of workers.Therefore,it is necessary to accurately predict the amount of water in the mine in order to effectively waterproof and control water.This paper takes an iron ore mine in Anhui as the research object,and organizes and analyzes the hydrological data and geological data of the study area.Such as the iron ore mining area stratum,structure,the occurrence and distribution of groundwater,surface water,groundwater recharge and discharge characteristics.According to the above information and data,the simulation range of the generalized research area,hydrogeological structure stratification,permeability,recharge and other parameters,and source and sink facies,using GMS software to establish three-dimensional numerical model of groundwater,based on the mine area is obtained by adjustable parameter and the actual fitting the best model,predict the study area from 2016 to 2025 for nearly 10 years of mine water inflow.In order to more accurately predict the amount of water inflow,stop all mining work in January and February of 2016,and drain the water level to-370 meters through the pumping well,set the water head(determine the water level value that the pumping well needs to maintain),and then the layer of water is continuously pumped out to the water level until it is stable.The water inflow is obtained through the Flow budget,that is,during the whole process,due to the continuous pumping of the pumping well,an expanding funnel is formed around the mine.From 2017 to 2021,the change is obvious and the depth is significantly reduced,and then tends to be stable.This shows that the water inflow of the mine reflected by the pumping water tends to be stable.The water inflow after final stabilization is 1593m3/d.At the same time,the mine water inflow is calculated and studied by big well method,and the two are compared.The results show that the groundwater numerical model prediction is more reliable.The simulation results have certain reference for the mining design department.