| Mineral resources are a very important non-renewable natural resources, which are an integral part of the material basis of human existence and development of society. Tunbasitao Goldmine had explored reserves of gold 5.1 tons at present. With the improving of work and, it can predict the gold storage about 6 tons at Tunbasitao goldfields within the region and Periphery. However, in the process of exploiting, water inrush risk is a very difficult problem. So, it is essential before exploitation to identify the hydrogeological conditions of mine area, analysis the source of water-filled water and the methods of water-flushing, forecast the water inflow of mine, etc.This paper, which is setting Tunbasitao Goldmine which is at Qinghe County, Xinjiang Province as the research object. On the basis of identification of hydrogeological conditions on mines, it is focus on analysis the filling water sources and water-filled way. At the same time, it select "Virtual Large Diameter Well" method and "water balance" method to predict mine Inflow. On the basis of the mining area on the actual geological survey, it select 12 indicators which content fissure ratio, RQD, hydraulic conductivity, compressive strength of rock mass, specific yield, confining bed of thickness, variation of water pressure difference of aquifers, features of geological structure, conductive, connectivity with water-filled water, mining depth, roadway support techniques and quality, and use Fuzzy Synthetic Evaluation to evaluate the risk of mine water inrush.This paper, which is the contents and results as follows:(1) The mining area belong to the low mountain hilly zone. At the bottom of the area, rock properties is sandstone and conglomerate of Carboniferous Jiangbasitao Fm. Some part of area have volcanic-intrusive rocks. Mine construction is relatively simple. At the eastern of mine have a fold, Er’Tai Fold passed through this area.(2) Mine district have little surface water, it has a river named Wulungu. According to mining geology, the groundwater of the mine is mainly quaternary pore water and fissure water. The aquifer is mainly the Carboniferous Jiangbasitao Fm of tectonic fissure aquifer, altered fracture zone aquifer, clastic rocks fractured aquifer layer and weathered aquifer. Groundwater is mainly recharged by atmospheric precipitation and snowmelt. In fractured bed, it mainly excreted by springs form.(3) Through the investigation of the hydrogeological conditions, the content of mineral deposit is prolific. The water sources have snowmelt water and interlaminar fracture water. The diversity of water-filled way is evidently. The way of water-filled content interlaminar fracture filling water directly, weathered water-filled fissure indirectly and tectonic fissures filled with water indirectly. But the differences of deposits in water-filled vertical zonation are relatively obviously, and orebody fill with water abundantly in the following of erosion datum plane.(4) This paper selects "Virtual Large Diameter Well" method and "water balance" method to predict the mine inflow, the results of unit mine inflow are 0.14L-S-1·m-1 and 0.13L·S-1·m-1 respectively, recommend mining unit inflow are 0.14L·S-1·m-1. Based on inflow calculation, this paper select 12 indicators which content fissure ratio, RQD, hydraulic conductivity, compressive strength of rock mass, specific yield, confining bed of thickness, variation of water pressure difference of aquifers, features of geological structure, conductive, connectivity with water-filled water, mining depth, roadway support techniques and quality to use The comprehensive evaluation index and Fuzzy Comprehensive Evaluation calculating the mine water inrush risk, the grade is medium. |
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