Method for controlling soil water erosion of in-situ leaching abandoned mine land of ion-type rare earth mine

Abstract

The invention discloses a method for controlling soil water erosion of an in-situ leaching abandoned mine land of an ion-type rare earth mine. The method obeys construction principles of (1) counter-slope water catchment, (2) high-water high storage, (3) storage before drainage, and (4) partitioned closure and drainage, so that water and soil loss intensity is effectively reduced, scouring to slopes is reduced, and the transport amount of downstream sand is reduced. In addition, the method can be used for effective collection of rainwater, so that the rainwater can be used for plant irrigation and harms can be turned into benefits. Besides, the method uses light materials, so that the possibility in that engineering facilities collapse due to rainwater emptying can be reduced, and practicability and the long service life of the facilities can be ensured.

Description

technical field [0001] The invention relates to a method for controlling soil hydraulic erosion, in particular to a method for controlling soil hydraulic erosion of mining traces by in-situ leaching of ionic rare earth ores. Background technique [0002] Currently, there are three mining techniques for ion-type rare earth ores: pool leaching, heap leaching, and in-situ leaching. Compared with pool leaching and heap leaching, in-situ leaching is considered to be a more environmentally friendly mining process, but after using in-situ leaching, it still brings the following environmental problems: [0003] First, the soil structure is damaged and loose, which can easily cause landslides, and a large amount of silt that has been released has also brought adverse effects on the environment and caused greater safety hazards. [0004] Second, mines that use the in-situ leaching process generally have problems such as steep terrain, unreasonable layout of hole network parameters, e...

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Problems solved by technology

[0003] First, the soil structure is damaged and the structure is loose, which can easily cause landslides, and a large amount of silt that has been released has also brought adverse effects on the environment and caused greater safety hazards

[0004] Second, mines that use the in-situ leaching process generally have problems such as steep terrain, unreasonable layout of hole network parameters, excessive liquid injection intensity, strong liquid injection during the rainy season, and unreasonable liquid collection methods, which will damage the crustal structure and slope. Stability, rock mass stress distribution and soil structure

[0005] Third, rock stress changes, rock mass moves, deforms, and is destroyed, and the soil structure is loose, which reduces the strength of the slope. When it exceeds a certain limit, disasters such as slope collapse, landslides, and debris flows are prone to occur, causing secondary damage to the geological environment

[0006] Fourth, it leads to the loss of soil nutrients, the reduction of soil productivity, and the desertification of land

[0007] Fifth, pollutants such as leaching agents and waste liquids infiltrate into the soil, participate in capillary action and damage plant roots, cause plant growth to stagnate and lose the function of fixing water and soil, easily causing water and soil erosion, and seriously affecting the growth of plants

[0010] (1) The cost is too high

The engineering measures are basically reinforced concrete, and the cost is high

[0011] (2) The effect is not good, easy to damage

[0013] (1) In-situ leaching leads to instability of the mountain, softening of the soil, and reduction of shear strength, so it is necessary to ensure the stability, practicability and longevity of the system measures

[0014] (2) The slope has poor stability and is prone to landslides, so it is necessary to reduce the erosion of the slope by rainwater to ensure its stability and reduce the probability of geological disasters

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