In-situ leaching uranium mining drilling hole blockage removal and permeation enhancement technology

Abstract

The invention belongs to the technical field of in-situ leaching uranium mining, in particular to an in-situ leaching uranium mining drilling hole blockage removal and permeation enhancement technology, and aims to finally achieve the effects of uranium deposit blockage removal and permeation enhancement by a series of technological operations such as adding an activating agent, a comprehensive blockage removal agent and an anti-expansion displacing agent to a blocked ore bed, and parameter control, so as to well solve the problem of near-wellbore zone and ore bed blockage in a neutral leaching technology. The technology is characterized by comprising the steps of reagent preparation, surfactant injection, comprehensive blockage removal agent injection, anti-expansion displacing agent injection, standing and air compressor hole washing. When the technology is adopted in the specific Xinjiang uranium deposit well flushing process, the problem of ore deposit blockage is effectively solved, and the water amount after hole flushing is larger than the normal water level by 2-3m<3> / h, the maintenance time reaches 130d or more, the stratum can be prevented from being damaged for the second time, and the technology is simple and feasible in technique and economy and is a preferred hole washing technology for uranium deposit blockage removal and permeation enhancement.

Description

technical field [0001] The invention belongs to the technical field of uranium mining by in-situ leaching, and in particular relates to a process for removing plugging and increasing permeability of drilling holes for in-situ leaching uranium mining. Background technique [0002] With the successful application and development of in-situ leaching uranium mining technology in Yili uranium mine in my country, the application of in-situ leaching uranium mining technology has also been carried out in other mines in my country. According to the core conditions of ore-bearing layers in different mines, it can be divided into acid leaching and alkali leaching. Leaching and neutral leaching, etc. Since in-situ leaching uranium mining is carried out underground, the groundwater-rock interaction is extremely complex, whether it is acid method, alkali method or CO 2 +O 2 In neutral leaching, there is a clogging problem that cannot be ignored in the mining process. Due to the clogging,...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to achieve the effect of removing plugging and increasing permeability of uranium ore deposits by adding activator, comprehensive plugging removing agent, anti-expansion displacing agent and a series of process operations and parameter control to the plugged ore layer, thereby solving the problem of neutral Near wellbore area and ore seam blockage in leaching process