Study on efficiency of liquefaction mining of solid potassium ore in western Qarhan area of Qarhan Salt Lake
The solid potassium ore of Qarhan area in Qarhan Salt Lake has the characteristics of low grade,discontinuous ore body and large resource reserves,which can not be mined by conventional mining methods and causes many difficulties for the exploitation and utilization of solid potassium.The change characteristics of the solid potassium ore in some typical boreholes before(2013)and after(2021)large-scale liquefaction mining exploitation in the western Qarhan area of Qarhan Salt Lake was compared and analyzed.The results showed that the solubility of solid potassium ore was 34.40%～99.98%with an average of 80.55%,and the solid potassium with the higher grade had a higher solubility,which meant the reduction of KCl grade was greater.The solid potash ore with the KCl grade of 0.1%～0.2%could be dissolved.The grade of solid mag-nesium salt was lower than before,but the grade of solid sodium salt was higher than before.The study on grade,thickness and variation characteristics of brine component of typical borehole solid potassium ore in western Qarhan area provided sci-entific evidence for evaluation of efficiency of liquefaction mining of solid potassium ore.On the whole,the efficiency of liq-uefaction mining was good in most area,but the influences of large hydraulic gradient,brine canal barrier and weak hydrau-lic connection on mining needed further study.
efficiency of liquefaction miningsolid potassium oreQarhan areaQarhan Salt Lake
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万方数据
