HALITE DISSOLUTION OF SALT DEPOSIT IN ZHANGXIAN COUNTY OF GANSU PROVINCE
Salt deposit in Zhangxian salt-bearing basin is completely buried underground and is a concealed deposit.Dissolution of halite is the preferred means of mining,that mining above 600 m at present,there is a lack of experimental research on the technical methods of mining the newly discovered rock salt deposit at a depth of 1 000 m.According to the latest stone salt mine detailed investigation work Dissolution of halite energy test,The main results are generalized as follows:Erosion rate and dissolution rate of most samples are fast and the upper erosion is faster than the side erosion,both of which decrease with the increase of brine concentration.Angle of side erosion have a large angle change,but can be accepted.In saturated brine,the side erosion angle between 35°～50°,brine expansion between 11.41％～13.34％,the average is 12.50％,it's conducive to the utilization of water resources.The water-insoluble residue has small amount and small particles,The expansion rate of water-insoluble residue between 0.96％～31.81％,and the solution cavity is seldom filled by the residue,which is favorable for the production of upper dissolution.The saturated brine has a NaCl content of 303.46～323.88 g/L and the content of harmful elements in the brine is low,it belongs to high-quality brine and can be used for salt production with simple processing.Glauber's salt can be used for comprehensive utilization of glauberite components in salt brine.The rock salt ore in the salt-bearing basin of Zhangxian County is suitable for mining by drilling-water dissolution of halite method.The rock salt mine is suitable for mining by water dissolution mining below 1 000 m.
salt depositdissolution of halitesalt-bearing basinZhangxian County
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