摘要
Gold mine is a non renewable resource.Due to the improvement of living standards,people's material life is getting better and better,and the demand for gold is also growing.But in the process of mining,there will be many problems.Thermal damage and mine water inflow are the important parts.The research on these two factors which have an important impact on mine mining is an important prerequisite for safe mining.Based on the"Mengman gold mine hydraulic environment detailed investigation"project,through the geological mapping,drilling and pumping experiments,water injection test,hot water chemical analysis and other methods to find out the hydrogeological conditions of Mengman gold mine.Through water quality detection and isotope detection of hot spring water samples from five hot spring points,namely,point D01,point D02,point D03,point D04 and point K01,this paper analyzes and studies the origin of hot spring,which is of great significance to the study of local geothermal origin and the guidance of mining area.The main understanding of this paper is as follows:1.The origin of hot springs is studied by H~+,O~-isotopes and other ions.The genetic model of hot spring can be summarized as follows:under the background of geothermal anomaly,atmospheric precipitation infiltrates into the deep underground along fault F2 through infiltration recharge,and then migrates upward along the fault fracture zone after being heated by underground heat flow,mixing with part of cold water near the surface and exposing to the surface in the form of hot spring.2.The permeability tensor is expressed by the degree of fracture development,and the relationship between the permeability tensors is positive linear,It shows that the permeability tensor in the study area is mainly three-dimensional flow.3.Water balance method,big well method and three-dimensional flow numerical method are used to predict the water inflow under the condition of 1015m platform mining.Then,by comparing with the measured water inflow,the calculation result of three-dimensional flow numerical method is the most accurate.Therefore,the three-dimensional flow numerical method is used to predict the water consumption of 900m platform in the mine.4.The influence of mining to 900m on hot spring is analyzed.