The Analysis Of Deep Hydrogeological Condition In Jinchuan Mine And Reasons Of Water Bursting In24-line Shaft

It is known that Jinchuan Mine is the largest production base of nickel and cobalt in China. Because the depth of former hydrogeological research is higher than1250m,it is difficult for present hydrogeological data to meet the requirement of deep mining.It is key for safe and efficient mining to find out deep hydrogeological condition of Jinchuan Mine., Based on former research, analysis of deep hydrogeological condition of Jinchuan Mine and research of reasons of water bursting in24-line shaft of Mine II will be applied in mining of700m level.Main research content and conclusion are as follows.(1).Refer to research and development of mine water at home and abroad, groundwater hydrochemistry method is taken into account to solve hydrogeology problem.So groundwater hydrochemistry method and stable hydrogen-oxygen isotopes analysis,which are available,are used in recognition of mine water of Jinchuan Mine.(2).Center on Jinchuan mining, hydrogeochemical characteristics of surface water, such as shallow groundwater, atmospheric precipitation, The Jinchuan Reservoir(water supply),are found out by water chemical sampling test within the area of300km2. Focus on Mine Ⅱ, relation between fissure fracture and water conductivity and relation between geological structure and water control are analyzed by site investigation, data collection and classification. Characteristic of fracture and fissure, characteristic and water conductivity of geotechnical rocks are basicly found out. It is shown that hydrogeological condition of Jinchuan Mine is fissure-water-oriented with local vein water.(3).Hydraulic relations among different waters of Jinchuan Mine are analyzed by hydrochemistry method and CO2partial pressure method and environmental isotope method. It is shown that mine water of Jinchuan Mine is combination of condensate water of filling and deep rock fissure-water.Because of human disturbance in mining,medium condition of groundwater is changed,e.g.,pH value.So condensate water of filling is the main supply of mine water.(4). By integrated geothermal exploration electric prospecting method,the reason of shattered area is F24、F18,which are in the north and south of18line and24line of Mine Ⅱ. The fracture zone and filling water and controlling-water structure and monoclinal structure create good recharge and runoff and storage conditions for groundwater.Meanwhile,it is inferred that F18may be a conducting-water development. The northern mining area of bedrock fissure water supply is filled into the181ine and24line segments deep occurrence of bedrock fissure water, and it will likely to lead the groundwater of Changning tidal basin into F18,which is beyond Jinchuan River F3development.