Study On Deep Hydrogeological Environment And Gushing Water Treatment Technology In Jinchuan Copper - Nickel Mine

With increasing depth of mining in Jinchuan, hydrogeological conditions and groundwater seepage fields have been changed significantly in the deep of mineral deposit. Mine discharge changed complex, lots of local sites increased significantly. Especially the24lines main shaft of mine inflow high to260m3/h, lag period of about18months, since the gushing water issues, so that overall progress of exploit engineering lagged two years in the middle of850line, the company has been in the production of irreparable damage. The premise is find out hydrogeological conditions of deep mine, it can study the comprehensive control techniques of gushing water in the process of excavation, this is order to improve the mine production capacity and the rate of mineral resources recovery.This paper takes the third mine of Jinchuan as the study area, it investigation and monitoring on the basis of mining hydrogeology conditions in the field, and combined with the test methods of water chemical analysis and environmental isotope indoor, using hydrogeochemical research method, and to study the cyclic pattern of deep groundwater in mining area.1.The mine influenced by three types of underground water, which is pore water, fissure water and karst water by field survey, it found the initial distribution in mining areas of recharge runoff discharge conditions and aquifer system. The aquife and aquiclude in deep mine mainly is that, the aquife of tectonic fracture development zone and the aquiclude of tectonic fracture less development zone, when it only expose water bearing fracture zone in the course of excavation, the mine-water inrush phenomenon occurs in the tunnel engineering.2.The main source of supply of shallow groundwater is atmospheric precipitation, and Deep groundwater mainly from underground karst corrosion fracture water, they result by D and18O stable isotope of groundwater. The radioisotope3H result that, the shallow groundwater recharge less than20years and the deep groundwater recharge can be traced back to the era of the1960s and1970s, this result explains that precipitation in the study area to the deep groundwater recharge more difficult, and deep groundwater flow is poor before mining.3.There are three groundwater flow system in mine analysis by chemical composition of the water body:①Loose Quaternary pore water flow system;②Shallow weathered rock fissure water flow system;③Deep structure karst fissure water flow system. The recharge sources of deep mining groundwater are brought together within a large region-wide, its main source of supply meltwater North Qilian.4.According to the results the groundwater flow system and the distribution of aquifer characteristics, it proposed gushing water treatment experiment of No.4orepass in third mine, the experimental scheme is a small range of plugging water curtain by "Grouting Bolts Method", that is an effective technology. The water quantity was reduced from6m3/h to0.2m3/h after grouting and the rate of exclusion of water is above97%, it is accord with "Mine shaft engineering construction and acceptance specification", and provide a reliable basis for Jinchuan mining area tunnel water gushing.