Horizontal fissure fluctuation leaching mining method

Abstract

The invention discloses a horizontal crack fluctuation leaching exploitation method, which relates to a leaching exploitation method and comprises the procedures that: (1) an injection well (1) and a recovery well (9) are formed and a horizontal crack face (2) is made in a manto (3); (2)a highly-compressed mixed fluid is injected into the manto (3) through the injection well (1); (3) the fluid pressure in the manto (3) is constantly fluctuated; (4) the leaching liquid which contains the mineral deposit is collected in the recovery well (9) or the injection well (1); (5) the mining process is continued until the leaching obtained mineral deposit concentration is less than the economic exploitation concentration. The invention is simple, effective and is beneficial to improving the recovery rate, recovery speed and recovery scope of the minerals, reducing the mining cost and is suitable for the leaching exploitation field of uranium, copper, aurum, rare earth and so on.

Description

technical field [0001] The invention relates to a mining method, in particular to a fluctuation leaching mining method based on horizontal cracks and pressure fluctuations, which is widely used in the field of leaching mining of uranium, copper, gold, rare earth, zinc and other minerals. Background technique [0002] The traditional in-situ leaching mining method is to inject a leaching agent under a certain constant pressure in the injection well, and the leaching agent will physically and chemically react with certain minerals in the ore seam to form a leaching solution, and directly extract the leaching agent in the recovery well. Immersion, to obtain useful minerals through the leaching solution. Recovery rate and recovery speed are important indicators of solution mining, an indicator to measure the improvement of resource utilization rate, and an important basis to measure the status of solution mining. The relative position of the injection well and the recovery well...

AI Technical Summary

Problems solved by technology

[0007] ①The traditional in-situ leaching mining method requires many injection wells and recovery wells, and the cost of drilling in the entire leaching mining is very large and very expensive; at the same time, the range affected by leaching is affected by the relative ratio of injection wells and recovery wells. Influenced by position, the leaching range and leaching strength will be affected by the drilling layout, and there will be leaching dead angles;

[0009] ③Leaching mining in low-permeability areas mainly relies on molecular diffusion rather than convection and dispersion to complete the leaching mining process, so the mining speed in low-permeability areas is slow, which affects the recovery rate and recovery speed of mineral deposits

[0010] How to reduce the cost of leaching, reduce the amount of drilling, increase the range of leaching, how to solve the difficulty of leaching caused by the non-uniformity of the ore seam, and how to improve the recovery rate, recovery range and recovery speed of leaching mining? are issues that need to be addressed

Images