Unit flow analysis method and system

Abstract

The present invention provides a flow analysis method and system for an in-situ leaching uranium mining area, wherein the method comprises: constructing a hydrodynamic model of the in-situ leaching uranium mining area; constructing a solute migration model based on the hydrodynamic model; constructing a unit flow model based on the solute migration model; and determining the pumping flow of each pumping unit in the in-situ leaching uranium mining area using the unit flow model. The present invention constructs a unit flow model in an isomorphic manner, and is capable of determining the pumping flow of each pumping unit in the in-situ leaching uranium mining area. Corresponding measures should be taken according to the different pumping flows of each pumping unit in the mining area, so as to solve the problem of uneven leaching of ore bodies in the in-situ leaching uranium mining area based on the principle of micro-balance.

Description

Technical Field

[0001] The present invention relates to the technical field of in-situ leaching uranium mines, and particularly to a method and system for analyzing unit flow rates. Background Art

[0002] In in-situ leaching uranium mines, a large number of injection wells and pumping wells are built in each mining area well field. The anisotropy of the formation permeability is caused by the differences in the local lithology of the ore-bearing aquifer of the uranium deposit. These interlayer water-confining lenses or weakly permeable interlayers lead to uneven leaching of the ore bodies in the unit injection and pumping holes in the in-situ leaching uranium mining area, excessive dilution of the leaching solution by groundwater, and poor leaching effects. Summary of the Invention

[0003] The purpose of the present invention is to provide a method and system for analyzing the flow rates in an in-situ leaching uranium mining area, accurately calculating the injection and pumping flow rates of each unit in the in-situ leaching uranium mining area, and thus solving the problem of uneven leaching of the ore bodies in the in-situ leaching uranium mining area.

[0004] To achieve the above purpose, the present invention provides the following solutions:

[0005] A method for analyzing the flow rates in an in-situ leaching uranium mining area includes:

[0006] Construct a hydrodynamic model of the in-situ leaching uranium mining area;

[0007] Based on the hydrodynamic model, construct a solute transport model;

[0008] Based on the solute transport model, construct a unit flow rate model;

[0009] Use the unit flow rate model to determine the injection and pumping flow rates of each pumping and injection unit in the in-situ leaching uranium mining area.

[0010] Optionally, the pumping and injection unit includes one injection hole and the four pumping holes closest to the injection hole.

[0011] Optionally, the constructing a solute transport model based on the hydrodynamic model specifically includes:

[0012] Select any pumping and injection unit in the in-situ leaching uranium mining area as the unit to be measured;

[0013] Based on the lithology parameters of the unit to be measured and the hydrodynamic model, construct an initial solute transport model of the unit to be measured;

[0014] Conduct a multi-tracer experiment on the unit to be measured;

[0015] Virtual solutes are put into multiple injection holes of the initial solute migration model, and the parameters of the initial solute migration model are adjusted until the flow rate data output by the initial solute migration model is consistent with the results of the multiple tracer experiments, thereby obtaining the solute migration model; the amount of virtual solute put into each injection hole is the same as the actual amount of actual solute in the multiple tracer experiments; the parameters include the dispersion coefficient, distribution coefficient, adsorption coefficient, porosity, permeability coefficient and specific yield of the formation.

[0016] Optionally, constructing a unit flow model based on the solute migration model specifically includes:

[0017] Obtain the lithology data of all pumping and injection units in the in-situ leaching uranium mining area;

[0018] Construct a unit flow model according to the lithology data of all pumping and injection units in the in-situ leaching uranium mining area; the parameters of the unit flow model are the same as those of the solute migration model.

[0019] Optionally, using the unit flow model to determine the pumping and injection flow rates of each pumping and injection unit in the in-situ leaching uranium mining area specifically includes:

[0020] Virtual solutes are put into the injection holes of all pumping and injection units in the unit flow model, and the pumping and injection flow rates of each pumping and injection unit in the in-situ leaching uranium mining area are output.

[0021] A flow rate analysis system for an in-situ leaching uranium mining area includes:

[0022] A hydrodynamic model construction module for constructing a hydrodynamic model of the in-situ leaching uranium mining area;

[0023] A solute migration model construction module for constructing a solute migration model based on the hydrodynamic model;

[0024] A unit flow model construction module for constructing a unit flow model based on the solute migration model;

[0025] A pumping and injection flow rate determination module for using the unit flow model to determine the pumping and injection flow rates of each pumping and injection unit in the in-situ leaching uranium mining area.

[0026] Optionally, the pumping and injection unit includes one injection hole and the four pumping holes closest to the injection hole.

[0027] Optionally, the solute migration model construction module specifically includes:

[0028] A selected unit of the pumping and injection unit to be measured for selecting any pumping and injection unit in the in-situ leaching uranium mining area as the pumping and injection unit to be measured;

[0029] A solute migration initial model construction unit for constructing an initial solute migration model of the injection and extraction unit to be measured based on the lithological parameters of the injection and extraction unit to be measured and the hydrodynamic model;

[0030] A multi-tracer experiment unit for conducting a multi-tracer experiment on the injection and extraction unit to be measured;

[0031] A solute migration model determination unit for putting virtual solutes into multiple injection holes of the initial solute migration model, adjusting the parameters of the initial solute migration model until the flow rate data output by the initial solute migration model is consistent with the results of the multi-tracer experiment, thereby obtaining the solute migration model; the dosage of the virtual solute in each injection hole is the same as the actual dosage of the actual solute in the multi-tracer experiment; the parameters include the dispersion coefficient, distribution coefficient, adsorption coefficient, porosity, permeability and specific yield of the formation.

[0032] Optionally, the unit flow rate model construction module specifically includes:

[0033] A lithological data acquisition unit for acquiring the lithological data of all injection and extraction units in the in-situ leaching uranium mining area;

[0034] A unit flow rate model construction unit for constructing a unit flow rate model according to the lithological data of all injection and extraction units in the in-situ leaching uranium mining area; the parameters of the unit flow rate model are the same as those of the solute migration model.

[0035] Optionally, the injection and extraction flow rate determination module specifically includes:

[0036] An injection and extraction flow rate determination unit for putting virtual solutes into the injection holes of all injection and extraction units in the unit flow rate model and outputting the injection and extraction flow rates of each injection and extraction unit in the in-situ leaching uranium mining area.

[0037] According to the specific embodiments provided by the present invention, the following technical effects are disclosed:

[0038] The present invention provides a flow rate analysis method and system for an in-situ leaching uranium mining area, wherein the method includes: constructing a hydrodynamic model of the in-situ leaching uranium mining area; constructing a solute migration model based on the hydrodynamic model; constructing a unit flow rate model based on the solute migration model; and determining the injection and extraction flow rates of each injection and extraction unit in the in-situ leaching uranium mining area by using the unit flow rate model. By constructing a unit flow rate model, the present invention can determine the injection and extraction flow rates of each injection and extraction unit in the in-situ leaching uranium mining area, and corresponding measures can be taken according to the different injection and extraction flow rates of each injection and extraction unit in the mining area, so as to solve the problem of uneven leaching of the ore body in the in-situ leaching uranium mining area based on the principle of micro-equilibrium. Description of the Drawings

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required in the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0040] Figure 1 It is a flowchart of the flow analysis method for the in-situ leaching uranium mining area in the embodiment of the present invention;

[0041] Figure 2 It is a flowchart of the unit flow analysis in the embodiment of the present invention;

[0042] Figure 3 It is the position and boundary of the regional model and the solute transport model in the study area in the embodiment of the present invention;

[0043] Figure 4 is a comparison diagram of four virtual solute tracers and polyol tracer tests in the embodiment of the present invention; Figure 4(a) is a comparison diagram of the virtual solute tracer and the polyol tracer test (n-butanol in the hole) in the embodiment of the present invention; Figure 4(b) is a comparison diagram of the virtual solute tracer and the polyol tracer test (methanol in the hole) in the embodiment of the present invention; Figure 4(c) is a comparison diagram of the virtual solute tracer and the polyol tracer test (ethanol in the hole) in the embodiment of the present invention; Figure 4(d) is a comparison diagram of the virtual solute tracer and the polyol tracer test (isopropanol in the hole) in the embodiment of the present invention;

[0044] Figure 5 It is a diagram showing the distribution of injection and production holes and solute injection in the simulated mining area in the embodiment of the present invention;

[0045] Figure 6 It is a solute transport distribution diagram of unit 3504 on the 32nd day in the embodiment of the present invention;

[0046] Figure 7 It is a diagram showing the mass change of solute concentration in unit 3504 in the embodiment of the present invention;

[0047] Figure 8 It is a solute transport distribution diagram of unit 4701 on the 32nd day in the embodiment of the present invention. Detailed implementation manners

[0048] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0049] The purpose of the present invention is to provide a flow analysis method and system for an in-situ leaching uranium mining area, accurately calculate the pumping flow of each unit in the in-situ leaching uranium mining area, and thus solve the problem of uneven leaching of ore bodies in the in-situ leaching uranium mining area.

[0050] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0051] Figure 1 is a flow chart of a flow analysis method for an in-situ leaching uranium mining area according to an embodiment of the present invention, as shown in Figure 1 As shown, the present invention provides a flow analysis method for an in-situ leaching uranium mining area, comprising:

[0052] Step 101: Construct a hydrodynamic model of the in-situ leaching uranium mining area;

[0053] Step 102: Construct a solute migration model based on the hydrodynamic model;

[0054] Step 103: Construct a unit flow model based on the solute migration model;

[0055] Step 104: Using the unit flow model, determine the pumping flow rate of each pumping unit in the in-situ leaching uranium mining area.

[0056] Specifically, the extraction unit includes an injection hole and four extraction holes closest to the injection hole.

[0057] Step 102 specifically includes:

[0058] Select any pumping unit in the in-situ leaching uranium mining area as the pumping unit to be tested;

[0059] Based on the lithological parameters and hydrodynamic model of the pumping unit to be tested, an initial solute migration model of the pumping unit to be tested is constructed;

[0060] Carry out multivariate tracer experiment on the pumping unit to be tested;

[0061] Put virtual solutes into multiple injection holes of the initial solute migration model, adjust the parameters of the initial solute migration model until the flow data output by the initial solute migration model is consistent with the results of the multivariate tracer experiment, and obtain the solute migration model; the amount of virtual solute put into each injection hole is the same as the actual amount of actual solute put into the multivariate tracer experiment; the parameters include the diffusion coefficient, distribution coefficient, adsorption coefficient, porosity, permeability and water supply degree of the formation.

[0062] Step 103, based on the solute migration model, construct a unit flow model, specifically including:

[0063] Obtain lithological data of all pumping units in the in-situ leaching uranium mining area;

[0064] Based on the lithology data of all pumping and injection units in the in-situ leaching uranium mining area, a unit flow model is constructed; the parameters of the unit flow model are consistent with those of the solute transport model.

[0065] Step 104 specifically includes:

[0066] Virtual solutes are put into the injection holes of all pumping and injection units in the unit flow model, and the pumping and injection flows of each pumping and injection unit in the in-situ leaching uranium mining area are output.

[0067] Figure 2 This is the flow chart of unit flow analysis in the embodiment of the present invention. As Figure 2 Taking a certain in-situ leaching uranium mining area as the focus, and referring to other in-situ leaching uranium mining areas for numerical simulation research, combined with groundwater dynamics, random distribution theory, etc., quantitative calculation and analysis are carried out to simulate and study the in-situ leaching uranium mining area.

[0068] (1) Establish a regional hydrodynamic model.

[0069] Carry out numerical simulation of the flow field for the in-situ leaching uranium mining field of the uranium mine to determine the hydraulic boundary conditions of the study area.

[0070] When establishing the hydrodynamic model, continuous water level monitoring data is usually used, or the initial water level in the area not affected by the flow field is used as the boundary condition. If there is no detailed water level data in the study area and it is impossible to determine the area without hydraulic influence, a larger regional hydrodynamic model including all mining areas is established. The pumping and injection conditions of the entire mining area are generalized to a certain extent, and the GMS three-dimensional groundwater simulation software is used to simulate and calculate the daily water level changes in the flow field of the mining area, obtaining the curve of the model boundary water level changing with time in the study area. And it is assigned in the form of a time array (that is, the parameters of the water level changing with time are imported into the study area model in the parameter setting of the model) to the study area model as the model hydraulic boundary condition parameters. The boundary between the solute transport model and the regional hydrodynamic model in the study area is shown in Figure 3 .

[0071] 1. First, generalize the strata. The established model is a heterogeneous geological model. The heterogeneity of the strata is reflected in the uneven distribution of formation parameters such as permeability coefficient, porosity, and dispersion coefficient. Based on the geophysical logging data of each borehole and referring to the stratigraphic sedimentary rhythm, the strata are generalized into several layers, given thickness, and each generalized layer is identified according to the lithology, and each lithology corresponds to a set of formation parameters.

[0072] 2. Then, generalize the boundary conditions. Roof boundary: In order to simplify the model, the overlying strata of the ore-bearing aquifer are unified into an aquitard, and the recharge and discharge at the top surface boundary are 0. Side boundary: The four surrounding boundaries of the simulation area are regarded as constant head boundaries.

[0073] (2) Conduct a multi-tracer test.

[0074] Through on-site real tracer tests, actual parameters are obtained to correct the model and make the model as realistic as possible. Select several injection and extraction units with a representative mining area as the main body to carry out multi-tracer tests. According to the results of the tracer tests, calculate the migration velocity of formation water between injection and extraction holes and the dispersion velocity of each tracer during the injection and extraction process.

[0075] The principle and process of the multi-tracer test, as well as the final experimental results: Different tracers with similar physical and chemical properties are put into 4 injection holes of the central injection and extraction unit and into the groundwater through different injection holes. In the tracer test area, the injection and extraction behavior of the boreholes causes the groundwater to flow, and the tracers dissolved in the formation water flow along. Calculate the migration velocity and dispersion velocity of formation water between each pair of injection and extraction holes through the concentration and appearance time of each tracer in the extraction liquid. (Calculation method: The migration velocity of alcohol tracer = migration distance / peak time of tracer concentration, where the migration distance is the distance from the injection hole to the extraction hole. The dispersion velocity of alcohol tracer = distance from the injection hole to the monitoring hole / appearance time).

[0076] (3) Build a solute transport model.

[0077] Use the actual parameters obtained from the previous tracer test (dispersion coefficient, distribution coefficient, adsorption coefficient, porosity, permeability coefficient, specific yield) of the formation to correct the model and make the model as realistic as possible. Build a solute transport model for the study area based on the regional hydrodynamic model, and calibrate the solute transport model according to the time series data (concentration change data over time) of four alcohols in the on-site multi-tracer test.

[0078] Put virtual solutes in the regional hydrodynamic model, which is the solute transport model. The setting of the injection conditions is exactly the same as that of the multi-tracer test. Put virtual solutes with the same properties into 4 injection holes of the central injection and extraction unit and mark them differently. Put the same amount of virtual solutes according to the injection concentration and injection time of the tracer test. The specific injection boreholes, injection time and concentration are shown in Table 1.

[0079] Table 1 Injection concentration of virtual solutes in each injection hole

[0080]

[0081]

[0082] The solute transport model of the study area adjusts the model parameters according to the tracer test. Adjust the adsorption constants of the four virtual solute tracers respectively to make the four virtual solute tracers show the same change trend as that in the multi-alcohol tracer test in each borehole (Figure 4). Make the simulation result consistent with the spatial distribution range of the tracer in the tracer test observation result.

[0083] Based on the regional hydrodynamic model, a solute transport model for the study area was established. The solute transport model was calibrated based on the time series data of four alcohols from the in-situ multi-tracer test. The error of the solute transport model was small and it could be used for the next-step prediction and analysis.

[0084] (4) Establish the unit flow model.

[0085] Based on the previously established solute transport model, a unit flow model was established. Specifically, virtual solutes were injected into each of the above injection holes. The virtual solutes in the model operation were the solutes virtually injected in the model. These virtual solutes were assumed to have exactly the same physicochemical properties. To distinguish them, the numbers of each hole were used, such as S4901, indicating the solute numbered 4901 injected from injection hole 4901), (see Figure 5 ) Figure 5 where 1 represents the pumping hole; 2 represents the injection hole, and 3 represents the solute injected into the model.

[0086] Method for establishing the unit flow model: In each injection hole of the solute transport model established in step (4) above, solutes with the same physicochemical properties but only different numbers were added to establish the unit flow model. A total of 42 solutes were injected into the unit flow model, and the injection concentration was all 5000 mg / L, and the injection time lasted for the entire simulation time. The total model operation time was 32 days, and the flow rate was simulated according to the actual flow rate of the mining area. The water level boundary of the model was the same as that of the previous solute transport model, and the concentration boundary took the concentrations of each solute at the geometric boundary of the model as the fixed concentration boundary of 0 mg / L.

[0087] (5) Unit flow analysis.

[0088] The unit flow model was used to simulate the pumping and injection conditions of the entire study area, and the software automatically calculated the amounts of different virtual solutes extracted from each pumping hole. Quantitative analysis was carried out on each group of pumping and injection units in the mining area based on the simulation results of the unit flow model.

[0089] For example, pumping unit 3504:

[0090] Unit 3504 is a mining area boundary unit, and the related injection holes of the unit are 3304, 3704, 3306 and 3706 ( Figure 3 ). It can be seen from the solute transport distribution map ( Figure 6 ) that the solutes S3304, S3704, S3306 and S3706 can all migrate to the pumping hole 3504 through convective migration. Taking 200 mg / L as the boundary, the migration areas of the four solutes are 4620, 7876, 3610 and 2515 m2 respectively. It can be seen from Figure 6 above that the hydraulic connection between the 4 injection holes and the pumping hole is good.

[0091] According to the model calculation results ( Figure 7), at the end of the 32-day simulation, the mass concentrations of solutes S3304, S3306, S3704, and S3706 in the leachate of the extraction hole 3504 were 534.25, 557.82, 813.59, and 381.97 mg / L respectively, and the concentrations of the 4 solutes were relatively balanced.

[0092] Regarding the analysis results of the unit flow: The connectivity between 3504 and the 4 injection holes in this unit is good and relatively uniform. Therefore, the flow rates of all injection holes in the unit can be increased simultaneously while keeping the liquid extraction volume of the extraction hole 3504 unchanged to further weaken the influence of other non-associated injection holes in the mining area on the extraction hole 3504.

[0093] For example, in the extraction unit 4701:

[0094] The extraction unit 4701 is an internal unit in the mining area, and the unit-related injection holes are 4501, 4502, 4901, and 4902 ( Figure 8 ). It can be seen from the solute migration distribution map ( Figure 8 ) that the hydraulic connection between the extraction hole 4701 and the injection hole 4501 is weak. Taking 200 mg / L as the boundary, the migration areas of the four solutes are 5503, 5361, 10997, and 8332 m2 respectively. Figure 6 and 8 in, represents the solute migration range; represents the streamline of the uranium leaching convection field; represents the extraction and injection boreholes in the stope.

[0095] Regarding the analysis results of the unit flow: The hydraulic channel between the extraction and injection holes 4701-4501 should be communicated, the liquid injection volume of 4501 should be increased, and its flow supply to the extraction hole 4701 should be increased.

[0096] In view of the problem of the balance between pumping and injection flow rates in the in-situ leaching process, the present invention first proposes the concept of micro-balance of pumping and injection units. Previous studies on the hydrodynamic convection field of in-situ uranium leaching only focused on the overall pumping and injection balance of the flow field, without further considering the hydraulic connection between pumping and injection holes and the balance within the pumping and injection units. This has limited the more accurate understanding of the in-situ uranium leaching flow field and made it difficult to more precisely control the balance of pumping and injection fluids in the mining area. The unit flow analysis method of this patent creatively proposes the concept of micro-balance of pumping and injection units, paying attention to the hydraulic connection between pumping and injection holes and the balance within the pumping and injection units. By means of the unit flow model, through simulation, analysis, and calculation, the cumulative flow distribution of each pumping hole and the solute flow direction of each injection hole are obtained. Based on this, the micro-balance adjustment of the unit flow is carried out, and finally the overall pumping and injection balance of the stope is achieved. The injection of liquid into the injection hole is traced and traced by a tracer with unique directivity, and the flow rate ratio of different injection holes to the pumping hole is calculated based on the concentration ratio of different tracers in the leachate. Virtual solutes are injected into each injection hole in the solute migration model. These virtual solutes are represented by the numbers of each hole, and the amounts of virtual solutes from different injection holes in each pumping hole are accurately calculated. When establishing the hydrodynamic model, the hydraulic boundary and initial water level data are calculated by the regional model; and the flow field segmentation method of "stripping" the research area from the entire mine is carried out through the balance generalization of the flow rates of the boundary boreholes. It provides a method for building a model for in-situ uranium leaching mines where there is no obvious spatial isolation between mining areas and the mining areas are continuously distributed in sheets. The uranium mine for building the model has several mining areas, which are continuously and closely arranged. There is neither detailed water level data nor a hydraulic influence-free area that can be determined based on the division of mining areas. During the unit flow analysis, the flow supply-reception relationship between each pair of pumping and injection holes in each flow unit is accurately calculated, and the flow rate of groundwater entering the flow field is calculated through the migration and diffusion of neutral solutes in the flow field. This serves as the basis for finally calculating the flow rate of each borehole that enables uniform leaching in the mining area and maintains the balance within the unit.

[0097] The present invention can be used in in-situ uranium leaching mines. During the in-situ uranium leaching process, through the numerical simulation of the uranium leaching flow field, unit flow analysis is carried out to more precisely regulate the pumping and injection fluid volumes, control the diffusion range of the leachate, improve production efficiency, and thus avoid pollution accidents.

[0098] The present invention provides a flow analysis system for an in-situ uranium leaching mining area, including:

[0099] A hydrodynamic model construction module for constructing a hydrodynamic model of the in-situ uranium leaching mining area;

[0100] A solute migration model construction module for constructing a solute migration model based on the hydrodynamic model;

[0101] A unit flow model construction module for constructing a unit flow model based on the solute migration model;

[0102] The pumping and injection flow rate determination module is used to determine the pumping and injection flow rates of each pumping and injection unit in the in-situ leaching uranium mining area by using the unit flow model.

[0103] Among them, the pumping and injection unit includes one injection hole and the four pumping holes closest to the injection hole.

[0104] The solute transport model construction module specifically includes:

[0105] The selected unit of the pumping and injection unit to be measured is used to select any pumping and injection unit in the in-situ leaching uranium mining area as the pumping and injection unit to be measured;

[0106] The initial solute transport model construction unit is used to construct the initial solute transport model of the pumping and injection unit to be measured based on the lithology parameters and hydrodynamic model of the pumping and injection unit to be measured;

[0107] The multi-tracer experiment unit is used to conduct a multi-tracer experiment on the pumping and injection unit to be measured;

[0108] The solute transport model determination unit is used to put virtual solutes into multiple injection holes of the initial solute transport model, and adjust the parameters of the initial solute transport model until the flow rate data output by the initial solute transport model is consistent with the results of the multi-tracer experiment, so as to obtain the solute transport model; the amount of virtual solute put into each injection hole is the same as the actual amount of actual solute put in the multi-tracer experiment; the parameters include the dispersion coefficient, distribution coefficient, adsorption coefficient, porosity, permeability and specific yield of the formation.

[0109] The unit flow model construction module specifically includes:

[0110] The lithology data acquisition unit is used to acquire the lithology data of all pumping and injection units in the in-situ leaching uranium mining area;

[0111] The unit flow model construction unit is used to construct a unit flow model based on the lithology data of all pumping and injection units in the in-situ leaching uranium mining area; the parameters of the unit flow model are the same as those of the solute transport model.

[0112] The pumping and injection flow rate determination module specifically includes:

[0113] The pumping and injection flow rate determination unit is used to put virtual solutes into the injection holes of all pumping and injection units in the unit flow model, and output the pumping and injection flow rates of each pumping and injection unit in the in-situ leaching uranium mining area.

[0114] The various embodiments in this specification are described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other. For the system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description in the method part.

[0115] In this article, specific examples are used to illustrate the principles and implementation modes of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation modes and application scopes. In summary, the content of this specification should not be construed as a limitation on the present invention.

Claims

1. A flow analysis method for an in-situ leaching uranium mining area, characterized in that: The method comprises: Construct a hydrodynamic model of an in-situ leaching uranium mining area; Based on the hydrodynamic model, a solute migration model is constructed; Based on the solute migration model, construct a unit flow model; Determining the pumping flow rate of each pumping unit in the in-situ leaching uranium mining area by using the unit flow model; The solute migration model is constructed based on the hydrodynamic model, specifically comprising: Select any pumping unit in the in-situ leaching uranium mining area as the pumping unit to be tested; Based on the lithological parameters of the pumping unit to be tested and the hydrodynamic model, constructing an initial solute migration model of the pumping unit to be tested; Performing a multivariate tracing experiment on the pumping unit to be tested; Virtual solutes are introduced into multiple injection holes of the initial solute migration model, and the parameters of the initial solute migration model are adjusted until the flow data output by the initial solute migration model is consistent with the result of the multivariate tracer experiment, so as to obtain the solute migration model; the amount of the virtual solute introduced into each injection hole is the same as the actual amount of the actual solute introduced in the multivariate tracer experiment; the parameters include the diffusion coefficient, distribution coefficient, adsorption coefficient, porosity, permeability and water supply degree of the formation; The constructing of a unit flow model based on the solute migration model specifically includes: Obtaining lithological data of all pumping units in the in-situ leaching uranium mining area; A unit flow model is constructed based on the lithological data of all the pumping units in the in situ leaching uranium mining area; the parameters of the unit flow model are consistent with the parameters of the solute migration model; Determining the pumping flow rate of each pumping unit in the in situ leaching uranium mining area by using the unit flow model specifically includes: Virtual solutes are injected into the injection holes of all the pumping units in the unit flow model, and the pumping flow of each pumping unit in the in situ leaching uranium mining area is output.

2. The flow analysis method for in-situ leaching uranium mining area according to claim 1, characterized in that: The pumping unit includes an injection hole and four pumping holes closest to the injection hole.

3. A flow analysis system for an in-situ leaching uranium mining area, characterized in that: The system comprises: A hydrodynamic model building module is used to build a hydrodynamic model of an in-situ leaching uranium mining area; A solute migration model building module, used to build a solute migration model based on the hydrodynamic model; A unit flow model construction module, used to construct a unit flow model based on the solute migration model; A pumping flow rate determination module, used to determine the pumping flow rate of each pumping unit in the in-situ leaching uranium mining area by using the unit flow model; The solute migration model construction module specifically includes: A pumping unit selection unit to be tested is used to select any pumping unit in the in-situ leaching uranium mining area as the pumping unit to be tested; A solute migration initial model building unit, used to build the solute migration initial model of the pumping unit to be tested based on the lithological parameters of the pumping unit to be tested and the hydrodynamic model; A multivariate tracing experiment unit, used for performing a multivariate tracing experiment on the pumping unit to be tested; A solute migration model determination unit is used to place virtual solutes into multiple injection holes of the solute migration initial model, adjust the parameters of the solute migration initial model, until the flow data output by the solute migration initial model is consistent with the result of the multivariate tracer experiment, and obtain the solute migration model; the amount of the virtual solute placed in each injection hole is the same as the actual amount of the actual solute placed in the multivariate tracer experiment; the parameters include the diffusion coefficient, distribution coefficient, adsorption coefficient, porosity, permeability and water supply degree of the formation; The unit flow model construction module specifically includes: A lithology data acquisition unit, used to acquire lithology data of all pumping units in the in-situ leaching uranium mining area; A unit flow model construction unit is used to construct a unit flow model according to the lithological data of all the pumping units in the in situ leaching uranium mining area; the parameters of the unit flow model are consistent with the parameters of the solute migration model; The pumping flow rate determination module specifically includes: The pumping flow determination unit is used to inject virtual solutes into the injection holes of all the pumping units in the unit flow model, and output the pumping flow of each pumping unit in the in situ leaching uranium mining area.

4. The flow analysis system for in-situ leaching uranium mining area according to claim 3, characterized in that: The pumping unit includes an injection hole and four pumping holes closest to the injection hole.

Images