Coal-uranium collaborative mining method based on room-pillar type and in-situ leaching type

Abstract

The invention provides a coal-uranium collaborative mining method based on a room-pillar type and an in-situ leaching type, and the method comprises the steps: carrying out the room-pillar type coal mining for a coal seam of a uranium-coal coexistence mining area with upper uranium and lower coal; after coal seam mining is completed, in-situ leaching type uranium mine mining is conducted on the uranium layer of the uranium-coal coexisting mining area with uranium on the upper portion and coal on the lower portion; coal-uranium collaborative mining is realized; synchronous mining of coal and uranium resources can be achieved, and the utilization rate of the resources is increased; meanwhile, earth surface damage and environmental pollution are reduced.

Description

Technical Field

[0001] This application relates to the technical field of mineral resource extraction, and particularly to a method for co-mining coal and uranium based on room-and-pillar mining and in-situ leaching. Background Art

[0002] In recent years, the proven coal reserves in the Ordos Basin, Inner Mongolia are very rich. At the same time, multiple large-scale uranium deposits have been discovered in the surrounding areas of the coal. The phenomenon of overlapping coexistence of uranium and coal resources is common in this area. A certain mining area is a typical mining area with overlapping coexistence of uranium and coal resources in this region, and shows a stratigraphic structure of "uranium above and coal below". Then, how to efficiently and safely extract the two has become an urgent problem. Summary of the Invention

[0003] This application aims to solve at least one of the technical problems in the related art to some extent.

[0004] To this end, the purpose of this application is to propose a method for co-mining coal and uranium based on room-and-pillar mining and in-situ leaching, so as to improve the mining efficiency and safety of coal-uranium symbiotic deposits while protecting the environment, and solve the problem that the uranium and coal resources in the mining area with overlapping coexistence of uranium and coal resources cannot be efficiently and safely extracted in the related art.

[0005] To achieve the above object, an embodiment of this application proposes a method for co-mining coal and uranium based on room-and-pillar mining and in-situ leaching, including:

[0006] For the coal seam in the uranium-coal coexistence mining area with uranium above and coal below, carry out room-and-pillar coal mining;

[0007] After the coal seam mining is completed, for the uranium seam in the uranium-coal coexistence mining area with uranium above and coal below, carry out in-situ leaching uranium mining.

[0008] In some implementation manners, the carrying out room-and-pillar coal mining for the coal seam in the uranium-coal coexistence mining area with uranium above and coal below includes:

[0009] Excavate a series of coal rooms in the coal seam, and the coal rooms are connected by crossheadings;

[0010] Carry out coal mining operations in the coal rooms, and leave coal pillars after coal mining to support the overlying strata.

[0011] In some implementation manners, the carrying out in-situ leaching for the uranium seam in the uranium-coal coexistence mining area with uranium above and coal below includes:

[0012] Determine the target area suitable for in-situ leaching uranium mining in the uranium seam;

[0013] According to the geological characteristics of the uranium seam, determine the target leaching solution injection plan;

[0014] Inject a leaching solution into the target area according to the target leaching solution injection plan.

[0015] Pump and lift the leachate and extract uranium from the leachate.

[0016] In some implementation manners, after extracting uranium from the leachate, it includes:

[0017] Perform hydrometallurgical process treatment on the uranium extracted from the leachate.

[0018] In some implementation manners, the target leaching solution injection plan includes a control strategy for determining the leaching solution for dissolving uranium minerals, the injection amount of the leaching solution, and the injection time.

[0019] In some implementation manners, the injecting a leaching solution into the target area according to the target leaching solution injection plan includes:

[0020] Inject a leaching solution into the target area according to the target leaching solution injection plan, and monitor the diffusion and migration state of the leaching solution during the injection process;

[0021] Adjust the concentration and flow rate of the leaching solution according to the diffusion and migration state of the leaching solution to improve the leaching efficiency of uranium.

[0022] The co - mining method, device, electronic device, and storage medium of coal and uranium based on room - pillar and in - situ leaching provided by this application realize the synchronous mining of coal and uranium resources and improve the resource utilization rate by carrying out room - pillar coal mining on the coal seam in the uranium - coal co - existing mining area with uranium above and coal below, and then carrying out in - situ leaching uranium mining for the uranium seam after the coal seam mining is completed. At the same time, the in - situ leaching uranium mining reduces surface damage and environmental pollution. Moreover, by optimizing the in - situ leaching process, the safety of the mining process is improved.

[0023] The additional aspects and advantages of this application will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of this application. Description of the Drawings

[0024] The above - mentioned and / or additional aspects and advantages of this application will become obvious and easy to understand from the following description of the embodiments in conjunction with the drawings, where:

[0025] Figure 1 is a schematic flow chart of a co - mining method of coal and uranium based on room - pillar and in - situ leaching provided by an embodiment of this application.

[0026] Figure 2 is a schematic flow chart of an in - situ leaching process provided by an embodiment of this application. Detailed implementation manners

[0027] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present application, and should not be construed as a limitation to the present application.

[0028] The pillar-and-stall and in-situ leaching-based coal-uranium co-mining method, device and equipment according to the embodiments of the present application will be described below with reference to the accompanying drawings.

[0029] Figure 1 The flowchart of a pillar-and-stall and in-situ leaching-based coal-uranium co-mining method provided by the embodiments of the present application. As Figure 1 shown, the pillar-and-stall and in-situ leaching-based coal-uranium co-mining method includes the following steps:

[0030] Step S101: For the coal seam in the uranium-coal coexistence mining area with uranium above and coal below, carry out pillar-and-stall coal mining.

[0031] As an implementation manner, the method for carrying out pillar-and-stall coal mining includes: excavating a series of coal rooms in the coal seam, and connecting the coal rooms through crossheadings; carrying out coal mining operations in the coal rooms, and leaving coal pillars after coal mining to support the overlying strata.

[0032] This step realizes excavating a series of coal rooms and crossheadings with specific sizes in the coal seam below the uranium ore layer according to the pillar-and-stall mining method, leaving coal pillars to support the stability of the overlying strata, and ensuring that the roof will not collapse.

[0033] Step S102: After the coal seam mining is completed, for the uranium ore layer in the uranium-coal coexistence mining area with uranium above and coal below, carry out in-situ leaching uranium mining.

[0034] As an implementation manner, the method for carrying out in-situ leaching mining includes:

[0035] Step S201: Determine the target area suitable for in-situ leaching uranium mining in the uranium ore layer.

[0036] After the coal mining is completed, first determine the target area suitable for in-situ leaching uranium mining in the uranium ore above the coal seam.

[0037] Step S202: Determine the target leaching solution injection scheme according to the geological characteristics of the uranium ore layer.

[0038] After determining the target area, design a suitable leaching solution injection scheme according to the geological characteristics of the uranium deposit.

[0039] In some embodiments, the target leaching solution injection plan includes determining a control strategy for the leaching solution used to dissolve uranium minerals, the injection volume of the leaching solution, and the injection time.

[0040] Step S203: Inject the leaching solution into the target area according to the target leaching solution injection plan.

[0041] In some embodiments, according to the target leaching solution injection plan, the leaching solution is injected into the target area, and the diffusion and migration states of the leaching solution during the injection process are monitored; according to the diffusion and migration states of the leaching solution, the concentration and flow rate of the leaching solution are adjusted to improve the leaching efficiency of uranium.

[0042] Thus, in order to further improve the leaching efficiency of uranium, the diffusion and migration states of the leaching solution can be monitored, so that the concentration and flow rate of the leaching solution can be adjusted according to the monitoring results, optimizing the leaching process, and thus improving the leaching efficiency of uranium.

[0043] Step S204: Pump and lift the leaching solution and extract uranium from the leaching solution.

[0044] In this step, the method of injecting the leaching solution into the uranium deposit is adopted to dissolve and extract uranium minerals, reducing surface damage and environmental pollution. According to the target leaching solution injection plan, the leaching solution is injected into the target area, and the injection volume and injection time are controlled. By controlling the injection volume and injection time of the leaching solution, the diffusion and migration of the leaching solution can be optimized, and the leaching efficiency of uranium can be improved.

[0045] In some embodiments, after extracting uranium from the leaching solution, it includes: performing a hydrometallurgical process on the uranium extracted from the leaching solution to achieve the recovery and utilization of uranium.

[0046] The co - mining method of coal and uranium based on room - pillar and in - situ leaching in the embodiments of the present application realizes the synchronous mining of coal and uranium resources and improves the resource utilization rate by carrying out room - pillar coal mining on the coal seam in the uranium - coal co - existing mining area with uranium above and coal below. After the coal seam mining is completed, in - situ leaching uranium mining is carried out for the uranium seam. At the same time, in - situ leaching uranium mining reduces surface damage and environmental pollution. Moreover, by optimizing the in - situ leaching process, the safety of the mining process is improved.

[0047] In the descriptions of the foregoing embodiments, the descriptions referring to terms such as "one embodiment", "some embodiments", "exemplifications", "specific exemplifications", or "some exemplifications" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or exemplification are included in at least one embodiment or exemplification of the present application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or exemplification. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or exemplifications. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or exemplifications described in this specification and the features of different embodiments or exemplifications.

[0048] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0049] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A method for coal-uranium coordinated mining based on room-and-pillar and in-situ leaching, characterized in that: The following steps are involved: For coal seams in uranium-coal coexisting mining areas with uranium above and coal below, room-and-pillar coal mining is carried out; After the coal seam mining is completed, in-situ leaching uranium mining is carried out on the uranium layers in the uranium-coal coexisting mining area.

2. The method according to claim 1, characterized in that The room-and-pillar coal mining method is used for coal seams in uranium-coal coexisting mining areas, including: A series of coal chambers are excavated in the coal seam, wherein the coal chambers are connected by connecting tunnels; Coal mining operations are carried out in the coal room, and after coal mining, coal pillars are retained to support overlying strata.

3. The method according to claim 1, characterized in that The in-situ leaching mining is carried out for the uranium layer in the uranium-coal coexisting mining area with uranium on top and coal on the bottom; including: identifying target areas within the uranium layer suitable for in situ leaching uranium mining; Determining a target leaching solution injection plan based on the geological characteristics of the uranium layer; Injecting the target area with the leaching solution according to the target leaching solution injection plan; Pumping lifts the leachate and extracts uranium from the leachate.

4. The method according to claim 3, characterized in that After extracting uranium from the leaching solution, the method comprises: The uranium extracted from the leaching solution is subjected to a hydrometallurgical process.

5. The method according to claim 3, characterized in that: The target leaching solution injection scheme includes a control strategy for determining the leaching solution used to dissolve uranium ore, the leaching solution injection amount and the injection time.

6. The method according to claim 5, characterized in that The step of injecting the leaching liquid into the target area according to the target leaching liquid injection scheme comprises: Injecting the target area with the leaching solution according to the target leaching solution injection plan, and monitoring the diffusion and migration state of the leaching solution during the injection process; According to the diffusion and migration state of the leaching solution, the concentration and flow rate of the leaching solution are adjusted to improve the uranium leaching efficiency.

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