Ion-type rare-earth seepage control in-situ mining method

Abstract

The invention discloses an ion-type rare-earth seepage control in-situ mining method for solving the problems of immersion liquid leakage, landslide and ecological damage in an existing in-situ leaching process of an ion adsorption type rare earth mine. The ion-type rare-earth seepage control in-situ mining method is characterized in that a comprehensive geophysical prospecting method is introduced into the existing in-situ leaching process for detecting fault, fracture and crushing development conditions of a bed rock bottom plate; a grouting technology is introduced into the existing in-situleaching process to construct an impervious layer on the bed rock bottom plate with poor development, so that the loss of rare-earth resources, caused by the fact that immersion liquid enters underground water through the bed rock bottom plate, is prevented; and an injection-extraction self-control system composed of an infiltration line automatic monitoring sensor, an automatic liquid injectiondevice and vacuum extraction equipment is introduced into the existing in-situ leaching process, so that the injection-extraction of the immersion liquid is accurately controlled, and the constructionof a digital mine is assisted. The method is particularly suitable for the ion adsorption type rare earth mines with poor bottom plate development and poor permeability.

Description

technical field [0001] The invention belongs to the technical field of in-situ mining of ion-type rare earths, and in particular relates to a seepage-controlled in-situ mining method of ion-type rare earths. Background technique [0002] Ion-adsorption type rare earth ore, also known as weathering crust leaching type rare earth ore, is that granite rich in rare earth elements dissolves and migrates under long-term external force geological action, and absorbs kaolin and Mongolian clay deposited in the weathering crust of the former surface granite under suitable environmental conditions. Ore bodies are formed in clay minerals such as calcite and illite. Although the total amount of identified resources of ion-adsorption rare earth mines widely distributed in South China is not large, but due to the relatively high content of rare heavy rare earth elements (the content of heavy rare earth elements in some mining areas exceeds 60%), it is an important component of global rare ...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problems of leachate leakage, landslides and ecological damage in the existing in-situ leaching process of ion-adsorption rare earth mines, and provides a seepage-controlled in-situ mining method for ion-adsorbed rare earths

Images