A kind of ionic rare earth anti-seepage curtain construction method

Abstract

The invention discloses a method for constructing an ion-type rare earth anti-seepage curtain. The method for constructing an anti-seepage curtain aims at the loss of rare earth resources and the ecological environment of the mining area caused by the vertical or horizontal migration of leachate during the in-situ leaching mining process of ion-type rare earth ores. To: divide blocks based on the topography and geomorphology of the mining area and the spatial distribution characteristics of the bedrock fracture zone; use the curtain grouting anti-seepage technology to construct a cascaded annular anti-seepage curtain with a low center and high surroundings; use the geographic information system to accurately locate the drilling location and depth, to ensure that the drilling holes of the same annular curtain are at the same horizontal depth; apply the interval drilling grouting process in the grouting process and the bottom-up layered high-pressure pouring method to construct the anti-seepage curtain to ensure that the anti-seepage material can effectively fill the curtain area All cracks in the bedrock broken zone; the construction effect of the anti-seepage curtain is detected by the groundwater level recovery monitoring method. The invention is suitable for ionic rare earth mines where the bedrock is broken and developed, and the leakage of leachate is obvious, and can help the construction of ecological mines.

Description

technical field [0001] The invention belongs to the technical field of in-situ leaching and mining of ionic rare earths, and in particular relates to a method for constructing an anti-seepage curtain in the process of in-situ leaching and mining of ionic rare earths. Background technique [0002] Ionic rare earths were first discovered and named in my country in 1969. They are rare earth deposits dominated by heavy rare earth elements and are an important part of global rare earth resources. According to the survey, in 2015, the world's proven heavy rare earth reserves were about 544,200 tons, of which China's heavy rare earth reserves were about 220,000 tons, accounting for 40.4%, and the remaining resources were mainly distributed in the United States, Australia and India. Ionic rare earths are widely distributed in South China, where rare earth ions are adsorbed in the form of ions on clay minerals such as kaolin, montmorillonite, and illite, and can be washed out with el...

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Problems solved by technology

[0005] The present invention aims to solve the resource and environmental problems existing in the existing in-situ leaching mining process of ion-type rare earth mines, and provides ion-type Construction method of anti-seepage curtain in the process of in-situ leaching mining of rare earth ore

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