Method and device for determining avoidance distance in coordinated mining of uranium-coal heterogeneous ore deposits

Abstract

The present invention provides a method and device for determining the avoidance distance for coordinated mining of uranium-coal heterogeneous symbiotic deposits. The method comprises: establishing a basic groundwater flow field model for the uranium-coal heterogeneous symbiotic deposit, a groundwater numerical model for coal mining, and a numerical model for coordinated uranium-coal mining; using the basic groundwater flow field model and the numerical model for coordinated uranium-coal mining to simulate and predict the groundwater flow field, respectively, to obtain a first groundwater isowater level map and a third groundwater isowater level map; determining the optimal avoidance orientation for coordinated mining of the uranium-coal heterogeneous symbiotic deposit based on the first and third groundwater isowater level maps and the numerical model for coal mining; and determining the optimal avoidance distance for coordinated mining of the uranium-coal heterogeneous symbiotic deposit based on the optimal avoidance orientation. The present invention enables simultaneous mining of uranium and coal resources in time without interfering with each other in space, providing a new method for coordinated mining of heterogeneous uranium-coal resources.

Description

Technical Field

[0001] The present invention relates to the technical field of uranium and coal mining, and in particular to a method and device for determining an avoidance distance for coordinated mining of a uranium-coal heterogeneous paragenetic deposit. Background Art

[0002] Currently, there is no precedent for co-mining uranium and coal. The mining of uranium and coal resources is mutually restrictive, and improper development and utilization can lead to a series of mining, safety, and environmental problems. Therefore, a method for determining the avoidance distance for coordinated mining of uranium-coal deposits is urgently needed. This method can ensure that uranium and coal resources maintain a safe distance during co-mining to ensure safety. Summary of the Invention

[0003] The embodiment of the present invention provides a method and device for determining an avoidance distance for coordinated mining of uranium-coal heterogeneous ore deposits, so as to solve the problem that there is no method for co-mining uranium and coal in uranium-coal heterogeneous ore deposits in the prior art.

[0004] In a first aspect, an embodiment of the present invention provides a method for determining an avoidance distance for coordinated mining of a uranium-coal heterogeneous ore deposit, comprising:

[0005] The basic model of groundwater flow field in uranium-coal heterogeneous ore deposits, the numerical model of groundwater in coal mining, and the numerical model of uranium-coal coordinated mining were established respectively;

[0006] The groundwater flow field basic model is used to simulate and predict the groundwater flow field, and a first groundwater isowater level map is obtained under the natural state; the uranium-coal coordinated mining numerical model is used to simulate the regional groundwater flow field during coal mining at different locations, and a third groundwater isowater level map is obtained for the simulated area;

[0007] determining an optimal avoidance orientation for coordinated mining of a uranium-coal allotropic ore deposit based on the first groundwater isowater level map, the third groundwater isowater level map, and the coal mining groundwater numerical model;

[0008] Based on the optimal avoidance orientation, a numerical model of uranium-coal coordinated mining was used to simulate the groundwater flow field during uranium mining at different preset distances to determine the optimal avoidance distance for coordinated mining of uranium-coal allogeneic paragenetic deposits.

[0009] In a possible implementation, the groundwater flow field basic model is:

[0010] ;

[0011] in, express The permeability coefficient of the direction, express The permeability coefficient of the direction, express The permeability coefficient of the direction, represents the water level of the aquifer, It indicates the volume of groundwater flowing out or inflowing from a unit volume of aquifer per unit time. represents the water storage coefficient, Indicates time;

[0012] The groundwater flow field basic model includes three types of boundaries, of which the first type of boundary is

[0013] , ;

[0014] in, represents the water level distribution on the boundary area, represents the initial water level distribution on the boundary area, Represents the boundary surface of a three-dimensional region;

[0015] The second type of boundary is ;

[0016] in, represents the permeability coefficient along the normal direction on the boundary surface, represents the unit vector of the normal outside the boundary, represents a known flow function on the boundary surface;

[0017] The third type of boundary is ;

[0018] in, represents the known hydraulic head function on the boundary.

[0019] In a possible implementation, the numerical model of uranium-coal coordinated mining is used to simulate the regional groundwater flow field during coal mining at different locations to obtain a third groundwater isowater level map of the simulated area, including:

[0020] Determine the maximum distance of the uranium mining area from the coal mine boundary;

[0021] Draw a circle with the uranium mining area as the center and the farthest distance as the radius;

[0022] The obtained circle is divided evenly to obtain a preset number of sectors with a central angle of N, each sector corresponding to a direction;

[0023] The regional groundwater flow field during coal mining at different orientations corresponding to the central angles is simulated to obtain the third groundwater isowater level map of the simulated area.

[0024] In one possible implementation, determining an optimal avoidance orientation for coordinated mining of a uranium-coal allotropic ore deposit based on the first groundwater isowater map, the third groundwater isowater map, and the coal mining groundwater numerical model includes:

[0025] Using the coal mining groundwater numerical model, simulate the regional groundwater flow field during coal mining at the orientation corresponding to the first central angle, and obtain a current groundwater isowater level map of the simulated area;

[0026] Comparing the current groundwater isolevel map with the first groundwater isolevel map to determine a first location where the water level in the uranium mining area drops the least;

[0027] Detect whether the central angle of the sector corresponding to the first orientation is the same as N;

[0028] If the central angle of the sector corresponding to the first orientation is different from N, the coal mining groundwater numerical model is used on both sides of the sector corresponding to the first orientation to simulate the regional groundwater flow field during coal mining at the orientation corresponding to the second central angle to obtain the current groundwater isowater level map of the simulation area, and jump to the step of "comparing the current groundwater isowater level map with the first groundwater isowater level map to determine the first orientation with the smallest water level drop in the uranium mining area" until the central angle of the sector corresponding to the first orientation is the same as N, then the first orientation determined in the current cycle is the optimal avoidance orientation for coordinated mining of uranium-coal allogeneic symbiotic deposits, and the second central angle is smaller than the first central angle.

[0029] In a possible implementation, the first central angle is 90°, and the second central angle is 1 / 2 of the first central angle.

[0030] In one possible implementation, based on the optimal avoidance orientation, a numerical model of uranium-coal coordinated mining is used to simulate groundwater flow fields during uranium mining at different preset distances to determine the optimal avoidance distance for coordinated mining of uranium-coal allotropic symbiotic deposits, including:

[0031] Draw concentric circles of the circle at the optimal avoidance position with a preset distance as the interval radius;

[0032] At the boundary of each concentric circle, a numerical model of uranium-coal coordinated mining was used to simulate the groundwater flow field during uranium mining at different preset distances to determine the optimal avoidance distance for coordinated mining of uranium-coal allogeneic paragenetic deposits.

[0033] In one possible implementation, the numerical model of uranium-coal coordinated mining is used to simulate the groundwater flow field during uranium mining at different preset distances at the boundary of each concentric circle to determine the optimal avoidance distance for coordinated mining of uranium-coal allogeneic paragenetic deposits, including:

[0034] At the boundary of each concentric circle, the numerical model of uranium-coal coordinated mining is used to simulate the groundwater flow field during uranium mining at different preset distances, and the corresponding fourth groundwater isolevel map is obtained;

[0035] The isowater level map closest to the limit groundwater level of uranium in situ leaching mining in the fourth groundwater isowater level map is used as the target isowater level map;

[0036] The radius of the concentric circles corresponding to the target isowater level map is used as the optimal avoidance distance for the coordinated mining of uranium-coal allogeneic paragenetic deposits.

[0037] In a second aspect, an embodiment of the present invention provides a device for determining an avoidance distance for coordinated mining of a uranium-coal heterogeneous ore deposit, comprising:

[0038] The model building module is used to establish the basic groundwater flow field model of uranium-coal heterogeneous ore deposits, the groundwater numerical model of coal mining, and the numerical model of uranium-coal coordinated mining;

[0039] A simulation module is used to simulate and predict the groundwater flow field using the basic groundwater flow field model to obtain a first groundwater isowater level map under natural conditions; and to simulate the regional groundwater flow field during coal mining at different locations using a numerical model for coordinated uranium-coal mining to obtain a third groundwater isowater level map of the simulated area;

[0040] a calculation module, configured to determine an optimal avoidance orientation for coordinated mining of a uranium-coal allogeneic paragenetic deposit based on the first groundwater isowater level map, the third groundwater isowater level map, and the coal mining groundwater numerical model;

[0041] The calculation module is also used to simulate the groundwater flow field during uranium mining at different preset distances based on the optimal avoidance direction using a uranium-coal coordinated mining numerical model to determine the optimal avoidance distance for coordinated mining of uranium-coal allogeneic paragenetic deposits.

[0042] In a third aspect, an embodiment of the present invention provides a terminal comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the method for determining the avoidance distance for coordinated mining of uranium-coal allogeneic coexisting deposits as described in the first aspect or any possible implementation of the first aspect are implemented.

[0043] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the method for determining the avoidance distance for coordinated mining of uranium-coal allogeneic coexisting deposits as described in the first aspect or any possible implementation of the first aspect.

[0044] An embodiment of the present invention provides a method and device for determining an avoidance distance for coordinated mining of a uranium-coal heterogeneous paragenetic deposit. The method comprises the following steps: establishing a basic groundwater flow field model for the uranium-coal heterogeneous paragenetic deposit, a groundwater numerical model for coal mining, and a numerical model for coordinated uranium-coal mining; using the basic groundwater flow field model to simulate and predict the groundwater flow field, and obtaining a first groundwater isowater level map under a natural state; using the numerical model for coordinated uranium-coal mining to simulate the regional groundwater flow field during coal mining at different locations, and obtaining a third groundwater isowater level map for the simulated area; determining an optimal avoidance orientation for coordinated mining of the uranium-coal heterogeneous paragenetic deposit based on the first and third groundwater isowater levels, and the numerical model for coal mining; and based on the optimal avoidance orientation, using the numerical model for coordinated uranium-coal mining to simulate the groundwater flow field during uranium mining at different preset distances, and determining an optimal avoidance distance for coordinated mining of the uranium-coal heterogeneous paragenetic deposit. This method enables simultaneous mining of uranium and coal resources in time without affecting each other in space, thereby providing a new method for coordinated mining of heterogeneous uranium-coal resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0046] Figure 1 This is a flowchart of a method for determining an avoidance distance for coordinated mining of a uranium-coal heterogeneous ore deposit provided by an embodiment of the present invention;

[0047] Figure 2 This is a 16-position schematic diagram provided by an embodiment of the present invention;

[0048] Figure 3 This is a flowchart for determining the optimal avoidance orientation for coordinated mining of uranium-coal heterogeneous ore deposits provided by an embodiment of the present invention;

[0049] Figure 4 is a schematic diagram of concentric circles provided by an embodiment of the present invention;

[0050] Figure 5 Schematic diagram of the structure of a device for determining an avoidance distance for coordinated mining of a uranium-coal heterogeneous symbiotic deposit provided by an embodiment of the present invention;

[0051] Figure 6 is a schematic diagram of a terminal provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0052] In the following description, specific details such as particular system structures and techniques are provided for purposes of illustration, not limitation, to facilitate a thorough understanding of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0053] In order to make the purpose, technical solutions and advantages of the present invention more clear, specific embodiments will be described below with reference to the accompanying drawings.

[0054] In an embodiment of the present invention, a method for determining the avoidance distance for the coordinated mining of uranium-coal heterogeneous symbiotic deposits is provided. First, a model for predicting the avoidance distance for the co-mining of uranium and coal is established, and a safe avoidance scheme is determined for the co-mining of uranium and coal resources. This ensures that the uranium and coal resources are mined simultaneously in time and do not affect each other in space, thereby providing a new method for the coordinated mining of heterogeneous uranium and coal resources.

[0055] Figure 1 A flowchart of a method for determining an avoidance distance for coordinated mining of a uranium-coal heterogeneous ore deposit provided by an embodiment of the present invention is described in detail as follows:

[0056] Step 101 : establishing a groundwater flow field basic model of a uranium-coal heterogeneous symbiotic deposit, a groundwater numerical model for coal mining, and a numerical model for uranium-coal coordinated mining.

[0057] A basic groundwater flow model for uranium-coal heterogeneous deposits was established. This involved solving the governing equations for the three-dimensional groundwater flow problem, which can characterize the structure, movement characteristics, and various infiltration elements of the groundwater system. A heterogeneous, spatially three-dimensional, and unstable groundwater flow system was used, and the well-defined problem of the following equation was selected for description:

[0058] ;

[0059] in, express The permeability coefficient of the direction, in m / s, express The permeability coefficient of the direction, in m / s, express The permeability coefficient of the direction, in m / s, Indicates the water level of the aquifer in m. Represents the source-sink term, which is the volume of groundwater flowing out or into the aquifer per unit volume per unit time, in units of , It represents the water storage coefficient. When the groundwater level in the aquifer decreases by one unit, the volume of water stored in the aquifer will be released from the unit volume of the aquifer due to the vertical compression of the aquifer and the elastic expansion of the groundwater. Indicates time.

[0060] The basic model of groundwater flow field includes three types of boundaries. The first type of boundary is the boundary condition of water level height, the second type of boundary is the boundary condition of flow perpendicular to the boundary surface, and the third type of boundary is the boundary head and the normal derivative of the head.

[0061] The first type of boundary is the boundary condition with known hydraulic head. The hydraulic head is given at all points on the boundary. There is no loss of hydraulic head when the boundary exchanges with groundwater. The boundary has an infinite recharge capacity for uranium in the aquifer. Its boundary equation is:

[0062] ,

[0063] in, represents the water level distribution on the boundary area, represents the initial water level distribution on the boundary area, Represents the boundary surface of a three-dimensional region;

[0064] The boundary between an aquifer and a river, lake, or ocean in direct contact may satisfy the first type of boundary condition when there is an adequate source of recharge.

[0065] The amount of water flowing into or out of the boundary per unit time with a known flux is a given boundary condition, that is, the flow perpendicular to the boundary surface is given, so the second type of boundary can be expressed as

[0066] ;

[0067] in, represents the permeability coefficient along the normal direction on the boundary surface, represents the unit vector of the normal outside the boundary, represents a known flow function on the boundary surface;

[0068] When solving actual groundwater problems, sometimes we encounter some first-class boundaries and some second-class boundaries, which become mixed boundary problems. The linear combination of is known, so the third type of boundary can be expressed as

[0069] ;

[0070] in, represents the known hydraulic head function on the boundary.

[0071] In one embodiment, based on the basic model of groundwater flow field, the drainage process during coal mine production is depicted to construct a numerical model of groundwater in coal mining. The depiction method is: setting the boundary of the unit where the coal mine goaf is located, and setting it year by year according to the progress of coal mining. For the goaf formed after mining in a certain year, its drainage elevation is the bottom elevation of the unit where it is located. For the section that has not been mined, no drainage boundary is set. Therefore, the groundwater flow state during coal mining is a dynamic non-stable flow. The calculation formula for the boundary of the unit where the coal mine goaf is located in the model is:

[0072]

[0073] in,

[0074] Indicates the water flow from the aquifer into the goaf, in m 3 / d; H Indicates the elevation of goaf drainage, in m; K represents the permeability coefficient, the unit is m / d; L Indicates the thickness of the aquifer in m; A Indicates the area of the cell where the boundary is located, in m 2 .

[0075] In one embodiment, based on the numerical model of groundwater in coal mining, the distribution of uranium ore bodies is depicted to construct a numerical model of uranium-coal coordinated mining. The depiction method can be: taking the uranium mining area as the center and the length as the center, Draw a circle with the radius of N, divide the obtained circle evenly, and obtain a preset number of sectors with a central angle of N, each sector corresponding to a direction. It is the maximum distance between the uranium mining area and the coal mine boundary.

[0076] Optionally, in this embodiment, the relative orientation to the uranium mining area can be divided into 16 orientations with a central angle of 22.5°, see Figure 2 The 16-position schematic diagram shown.

[0077] Step 102: Use the basic groundwater flow field model to simulate and predict the groundwater flow field to obtain a first groundwater isowater level map under the natural state; use the uranium-coal coordinated mining numerical model to simulate the regional groundwater flow field during coal mining at different locations to obtain a third groundwater isowater level map of the simulation area.

[0078] Optionally, the groundwater flow field basic model of uranium-coal allogeneic paragenetic deposits can be used to simulate and predict the groundwater flow field under natural conditions. Combined with the corresponding boundary conditions, the first groundwater isowater level map under natural conditions can be obtained.

[0079] Optionally, a numerical model of uranium-coal coordinated mining is used to simulate the regional groundwater flow field during coal mining at different locations, and obtain a third groundwater isowater level map of the simulation area, which may include:

[0080] Determine the maximum distance between the uranium mining area and the coal mine boundary; this maximum distance can be obtained by measurement;

[0081] Draw a circle with the uranium mining area as the center and the farthest distance as the radius;

[0082] The obtained circle is divided evenly to obtain a preset number of sectors with a central angle of N, each sector corresponding to a direction;

[0083] In this embodiment, if Figure 2 As shown, the central angle N can be 22.5°. It should be noted that the circle can also be divided into other parts, and the above is only an example.

[0084] The regional groundwater flow field during coal mining at different orientations corresponding to the central angles is simulated to obtain the third groundwater isowater level map of the simulated area.

[0085] Step 103 : determining the optimal avoidance direction for coordinated mining of the uranium-coal heterogeneous paragenetic deposit based on the first groundwater isowater level map, the third groundwater isowater level map, and the coal mining groundwater numerical model.

[0086] When determining the best avoidance direction for coordinated mining of uranium-coal heterogeneous ore deposits, Figure 2 Based on the 16-direction schematic diagram shown, the regional groundwater flow field during coal mining in different directions was simulated. After obtaining the third groundwater isowater level line diagram of the simulated area, the third groundwater isowater level line diagram was compared with the first groundwater isowater level line diagram, and the direction with the smallest water level drop was taken as the best avoidance direction. The water flow in this direction is small, and the impact on the simultaneous mining space of uranium and coal mines is minimal.

[0087] In one embodiment, see Figure 3 As shown, based on the first groundwater isowater level map, the third groundwater isowater level map and the groundwater numerical model for coal mining, the optimal avoidance orientation for coordinated mining of uranium-coal heterogeneous paragenetic deposits can be determined, which may include:

[0088] The numerical model of groundwater in coal mining is used to simulate the regional groundwater flow field during coal mining at the direction corresponding to the first central angle, and the current groundwater isolevel map of the simulated area is obtained.

[0089] Compare the current groundwater isolevel map with the first groundwater isolevel map to determine the first location where the water level in the uranium mining area drops the least;

[0090] Check whether the central angle of the sector corresponding to the first orientation is the same as N;

[0091] If the central angle of the sector corresponding to the first orientation is different from N, with the first orientation as the center, on both sides of the sector corresponding to the first orientation, the coal mining groundwater numerical model is used to simulate the regional groundwater flow field during coal mining at the orientation corresponding to the second central angle, and the current groundwater isolevel map of the simulation area is obtained. Jump to the step "compare the current groundwater isolevel map with the first groundwater isolevel map to determine the first orientation with the smallest water level drop in the uranium mining area" and execute until the central angle of the sector corresponding to the first orientation is the same as N. The first orientation determined in the current cycle is the optimal avoidance orientation for coordinated mining of uranium-coal allogeneic symbiotic deposits, and the second central angle is smaller than the first central angle.

[0092] In this embodiment, the central angle gradually decreases, with the first central angle being 90° and the second central angle being half of the first, thereby ultimately determining the most accurate avoidance orientation. The first central angle can be 90°. Simulating the regional groundwater flow field during coal mining in the four orientations of north, east, south, and west is performed. Once the first orientation is determined to be the one with the smallest water level drop in the uranium mining area, the regional groundwater flow field during coal mining is simulated in orientations corresponding to angles less than 90° on both sides of the sector corresponding to the first orientation. Ultimately, a 22.5° orientation is determined to be the optimal avoidance orientation for coordinated mining of uranium-coal allomorphic deposits.

[0093] An example is as follows: Using the coal mining groundwater numerical model, the regional groundwater flow field during coal mining at the direction corresponding to the central angle of 90° is simulated to obtain the groundwater isolevel map P1 of the simulated area;

[0094] Compare the groundwater isolevel map P1 with the first groundwater isolevel map to determine the first orientation where the water level in the uranium mining area drops the least, for example, the determined orientation is R1;

[0095] Then, with R1 as the center, the coal mining groundwater numerical model is used on both sides of the sector corresponding to R1 to simulate the regional groundwater flow field during coal mining at the direction corresponding to the central angle of 45°, and the groundwater isolevel map P2 of the simulated area is obtained;

[0096] Compare the groundwater isolevel map P2 with the first groundwater isolevel map to determine that the direction where the water level in the uranium mining area drops the least is R2;

[0097] The orientation is further refined. With R2 as the center, the coal mining groundwater numerical model is used on both sides of the sector corresponding to R2 to simulate the regional groundwater flow field during coal mining at the orientation corresponding to the central angle of 22.5°. The groundwater isolevel map P3 of the simulated area is obtained.

[0098] By comparing the groundwater isolevel map P3 with the first groundwater isolevel map, it is determined that the direction with the smallest water level drop in the uranium mining area is R3, which is the best avoidance direction.

[0099] Step 104 , based on the optimal avoidance orientation, a numerical model of uranium-coal coordinated mining is used to simulate the groundwater flow field during uranium mining at different preset distances to determine the optimal avoidance distance for coordinated mining of uranium-coal allotropic symbiotic deposits.

[0100] After determining the optimal avoidance orientation, the groundwater flow field is simulated at different positions on the optimal avoidance orientation based on the optimal avoidance orientation, thereby obtaining the optimal avoidance distance for coordinated mining of uranium-coal heterogeneous symbiotic deposits.

[0101] In one embodiment, based on the optimal avoidance orientation, a numerical model for coordinated uranium-coal mining is used to simulate the groundwater flow field during uranium mining at different preset distances to determine the optimal avoidance distance for coordinated mining of uranium-coal paragenetic deposits, which may include:

[0102] Draw concentric circles with a preset distance as the radius at the optimal avoidance position;

[0103] At the boundary of each concentric circle, a numerical model of uranium-coal coordinated mining was used to simulate the groundwater flow field during uranium mining at different preset distances to determine the optimal avoidance distance for coordinated mining of uranium-coal allogeneic paragenetic deposits.

[0104] See also Figure 4 As shown in the concentric circle diagram, the preset distance can be set based on experience, for example, the preset distance can be 0.8 km, 1 km, 1.5 km, etc.

[0105] Optionally, at the boundary of each concentric circle, a numerical model of uranium-coal coordinated mining is used to simulate the groundwater flow field during uranium mining at different preset distances to determine the optimal avoidance distance for coordinated mining of uranium-coal paragenetic deposits, which may include:

[0106] At the boundary of each concentric circle, the numerical model of uranium-coal coordinated mining is used to simulate the groundwater flow field during uranium mining at different preset distances, and the corresponding fourth groundwater isolevel map is obtained;

[0107] The isowater level map closest to the limit groundwater level of uranium in situ leaching in the fourth groundwater isowater level map is used as the target isowater level map;

[0108] The radius of the concentric circle corresponding to the target isowater level map is taken as the optimal avoidance distance for the coordinated mining of uranium-coal paragenetic deposits.

[0109] The embodiment of the present invention respectively establishes a basic groundwater flow field model of a uranium-coal heterogeneous symbiotic deposit, a groundwater numerical model for coal mining, and a numerical model for coordinated uranium-coal mining; uses the basic groundwater flow field model to simulate and predict the groundwater flow field to obtain a first groundwater isowater level map under a natural state; uses the uranium-coal coordinated mining numerical model to simulate the regional groundwater flow field during coal mining at different locations to obtain a third groundwater isowater level map of the simulated area; determines the optimal avoidance orientation for coordinated mining of the uranium-coal heterogeneous symbiotic deposit based on the first groundwater isowater level map, the third groundwater isowater level map, and the groundwater numerical model for coal mining; based on the optimal avoidance orientation, uses the uranium-coal coordinated mining numerical model to simulate the groundwater flow field during uranium mining at different preset distances to determine the optimal avoidance distance for coordinated mining of the uranium-coal heterogeneous symbiotic deposit, thereby achieving simultaneous mining of uranium and coal resources in time without mutual interference in space, thereby providing a new method for coordinated mining of heterogeneous uranium-coal resources.

[0110] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0111] The following are device embodiments of the present invention. For details not fully described therein, reference may be made to the corresponding method embodiments described above.

[0112] Figure 5 A schematic diagram of the structure of a device for determining an avoidance distance for coordinated mining of a uranium-coal intergrowth deposit provided by an embodiment of the present invention is shown. For ease of illustration, only the portion relevant to the embodiment of the present invention is shown, which is described in detail as follows:

[0113] like Figure 5 As shown, the device 5 for determining the avoidance distance for coordinated mining of uranium-coal heterogeneous ore deposits includes: a model building module 51, a simulation module 52 and a calculation module 53.

[0114] A model building module 51 is used to respectively establish a groundwater flow field basic model of a uranium-coal heterogeneous paragenetic deposit, a groundwater numerical model for coal mining, and a numerical model for uranium-coal coordinated mining;

[0115] The simulation module 52 is used to simulate and predict the groundwater flow field using a basic groundwater flow field model to obtain a first groundwater isowater level map under natural conditions; and to simulate the regional groundwater flow field during coal mining at different locations using a numerical model for coordinated uranium-coal mining to obtain a third groundwater isowater level map of the simulated area.

[0116] A calculation module 53 is configured to determine an optimal avoidance orientation for coordinated mining of a uranium-coal heterogeneous symbiotic deposit based on the first groundwater isowater level map, the third groundwater isowater level map, and a groundwater numerical model for coal mining;

[0117] The calculation module 53 is also used to simulate the groundwater flow field during uranium mining at different preset distances based on the optimal avoidance direction and adopt the uranium-coal coordinated mining numerical model to determine the optimal avoidance distance for the coordinated mining of uranium-coal allogeneic paragenetic deposits.

[0118] In one possible implementation, the basic model of groundwater flow field is:

[0119] ;

[0120] in, express The permeability coefficient of the direction, express The permeability coefficient of the direction, express The permeability coefficient of the direction, represents the water level of the aquifer, It indicates the volume of groundwater flowing out or inflowing from a unit volume of aquifer per unit time. represents the water storage coefficient, Indicates time;

[0121] The basic model of groundwater flow field includes three types of boundaries, of which the first type of boundary is

[0122] , ;

[0123] in, represents the water level distribution on the boundary area, represents the initial water level distribution on the boundary area, Represents the boundary surface of a three-dimensional region;

[0124] The second type of boundary is ;

[0125] in, represents the permeability coefficient along the normal direction on the boundary surface, represents the unit vector of the normal outside the boundary, represents a known flow function on the boundary surface;

[0126] The third type of boundary is ;

[0127] in, represents the known hydraulic head function on the boundary.

[0128] In one possible implementation, the simulation module 52 uses a numerical model of uranium-coal coordinated mining to simulate the regional groundwater flow field during coal mining at different locations, and obtains a third groundwater isowater level map of the simulation area, which is used to:

[0129] Determine the maximum distance of the uranium mining area from the coal mine boundary;

[0130] Draw a circle with the uranium mining area as the center and the farthest distance as the radius;

[0131] The obtained circle is divided evenly to obtain a preset number of sectors with a central angle of N, each sector corresponding to a direction;

[0132] The regional groundwater flow field during coal mining at different orientations corresponding to the central angles is simulated to obtain the third groundwater isowater level map of the simulated area.

[0133] In one possible implementation, the calculation module 53 determines the optimal avoidance orientation for coordinated mining of uranium-coal allotropic symbiotic deposits based on the first groundwater isowater level map, the third groundwater isowater level map, and the coal mining groundwater numerical model, and is used to:

[0134] The numerical model of groundwater in coal mining is used to simulate the regional groundwater flow field during coal mining at the direction corresponding to the first central angle, and the current groundwater isolevel map of the simulated area is obtained.

[0135] Compare the current groundwater isolevel map with the first groundwater isolevel map to determine the first location where the water level in the uranium mining area drops the least;

[0136] Check whether the central angle of the sector corresponding to the first orientation is the same as N;

[0137] If the central angle of the sector corresponding to the first orientation is different from N, the coal mining groundwater numerical model is used on both sides of the sector corresponding to the first orientation to simulate the regional groundwater flow field during coal mining at the orientation corresponding to the second central angle to obtain the current groundwater isowater level map of the simulation area, and jump to the step "compare the current groundwater isowater level map with the first groundwater isowater level map to determine the first orientation with the smallest water level drop in the uranium mining area" until the central angle of the sector corresponding to the first orientation is the same as N. The first orientation determined in the current cycle is the optimal avoidance orientation for coordinated mining of uranium-coal allogeneic symbiotic deposits, and the second central angle is smaller than the first central angle.

[0138] In a possible implementation, the first central angle is 90°, and the second central angle is 1 / 2 of the first central angle.

[0139] In one possible implementation, the calculation module 53 simulates the groundwater flow field during uranium mining at different preset distances using a numerical model for coordinated uranium-coal mining based on the optimal avoidance orientation to determine the optimal avoidance distance for coordinated mining of uranium-coal paragenetic deposits. The calculation module 53 is used to:

[0140] Draw concentric circles with a preset distance as the radius at the optimal avoidance position;

[0141] At the boundary of each concentric circle, a numerical model of uranium-coal coordinated mining was used to simulate the groundwater flow field during uranium mining at different preset distances to determine the optimal avoidance distance for coordinated mining of uranium-coal allogeneic paragenetic deposits.

[0142] In one possible implementation, the calculation module 53 uses a numerical model of uranium-coal coordinated mining to simulate the groundwater flow field during uranium mining at different preset distances at the boundary of each concentric circle to determine the optimal avoidance distance for coordinated mining of uranium-coal paragenetic deposits, and is used to:

[0143] At the boundary of each concentric circle, the numerical model of uranium-coal coordinated mining is used to simulate the groundwater flow field during uranium mining at different preset distances, and the corresponding fourth groundwater isolevel map is obtained;

[0144] The isowater level map closest to the limit groundwater level of uranium in situ leaching in the fourth groundwater isowater level map is used as the target isowater level map;

[0145] The radius of the concentric circle corresponding to the target isowater level map is taken as the optimal avoidance distance for the coordinated mining of uranium-coal paragenetic deposits.

[0146] The above-mentioned device for determining the avoidance distance of coordinated mining of uranium-coal heterogeneous symbiotic deposits establishes the basic groundwater flow field model of uranium-coal heterogeneous symbiotic deposits, the groundwater numerical model of coal mining, and the uranium-coal coordinated mining numerical model through the model construction module; the simulation module uses the basic groundwater flow field model to simulate and predict the groundwater flow field, obtains the first groundwater isowater level line map under the natural state, and uses the uranium-coal coordinated mining numerical model to simulate the regional groundwater flow field during coal mining at different directions, and obtains the third groundwater isowater level line map of the simulation area. line map; based on the first groundwater isolevel line map, the third groundwater isolevel line map and the coal mining groundwater numerical model, the calculation module determines the optimal avoidance orientation for the coordinated mining of uranium-coal heterogeneous paragenetic deposits, and based on the optimal avoidance orientation, the uranium-coal coordinated mining numerical model is used to simulate the groundwater flow field during uranium mining at different preset distances, and determine the optimal avoidance distance for the coordinated mining of uranium-coal heterogeneous paragenetic deposits, thereby realizing the simultaneous mining of uranium and coal resources in time and without affecting each other in space, providing a new method for the coordinated mining of heterogeneous paragenetic uranium and coal resources.

[0147] Figure 6Schematic diagram of a terminal provided by an embodiment of the present invention. Figure 6 As shown, the terminal 6 of this embodiment includes: a processor 60, a memory 61, and a computer program 62 stored in the memory 61 and executable on the processor 60. When the processor 60 executes the computer program 62, the steps of the above-mentioned method for determining the avoidance distance for coordinated mining of uranium-coal heterogeneous paragenetic deposits are implemented, such as Figure 1 Alternatively, when the processor 60 executes the computer program 62, the functions of the modules / units in the above-mentioned device embodiments are realized, for example, Figure 6 The functions of each module / unit are shown.

[0148] Exemplarily, the computer program 62 may be divided into one or more modules / units, which are stored in the memory 61 and executed by the processor 60 to implement the present invention. The one or more modules / units may be a series of computer program instruction segments capable of implementing specific functions, which are used to describe the execution process of the computer program 62 in the terminal 6. For example, the computer program 62 may be divided into Figure 6 The modules / units shown.

[0149] The terminal 6 may include, but is not limited to, a processor 60 and a memory 61. Those skilled in the art will understand that Figure 6 It is only an example of terminal 6 and does not constitute a limitation on terminal 6. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the terminal may also include input and output devices, network access devices, buses, etc.

[0150] The processor 60 may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor.

[0151] The memory 61 can be an internal storage unit of the terminal 6, such as a hard drive or memory of the terminal 6. Alternatively, the memory 61 can be an external storage device of the terminal 6, such as a plug-in hard drive, a Smart Media Card (SMC), a Secure Digital (SD) card, a flash memory card, etc. Furthermore, the memory 61 can include both an internal storage unit of the terminal 6 and an external storage device. The memory 61 is used to store the computer program and other programs and data required by the terminal. The memory 61 can also be used to temporarily store data that has been output or is about to be output.

[0152] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0153] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0154] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present invention.

[0155] In the embodiments provided by the present invention, it should be understood that the disclosed devices / terminals and methods can be implemented in other ways. For example, the device / terminal embodiments described above are merely illustrative. For example, the division of the modules or units is merely a logical functional division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be through some interface, indirect coupling or communication connection of devices or units, and can be electrical, mechanical, or other forms.

[0156] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0157] In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0158] If the integrated module / unit is implemented as a software functional unit and sold or used as a standalone product, it can be stored in a computer-readable storage medium. Based on this understanding, the present invention can implement all or part of the process steps in the above-mentioned method embodiments by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When executed by a processor, the computer program can implement the steps of the above-mentioned method embodiments for determining the avoidance distance for coordinated mining of uranium-coal intergrowth deposits. The computer program includes computer program code, which can be in source code form, object code form, executable file, or some intermediate form. The computer-readable medium can include any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a mobile hard drive, a magnetic disk, an optical disk, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunications signal, and a software distribution medium.

[0159] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the scope of protection of the present invention.

Claims

1. A method for determining the avoidance distance for coordinated mining of uranium-coal heterogeneous ore deposits, characterized in that: include: A basic groundwater flow field model for uranium-coal paragenetic deposits, a groundwater numerical model for coal mining, and a numerical model for uranium-coal coordinated mining were established respectively; the basic groundwater flow field model is: Among them, K xx represents the permeability coefficient in the x direction, K yy represents the permeability coefficient in the y direction, K zz represents the permeability coefficient in the z direction, h represents the water level of the aquifer, ω represents the volume of groundwater flowing out or inflowing per unit volume of the aquifer per unit time, S s represents the water storage coefficient, and t represents the time; The groundwater flow field basic model includes three types of boundaries, of which the first type of boundary is h'(x,y,z,t)=h0(x,y,z,t), (x,y,z)∈s; Where h'(·) represents the water level distribution on the boundary area, H0(·) represents the initial water level distribution on the boundary area, and s represents the boundary surface of the three-dimensional region; The second type of boundary is Where k represents the permeability coefficient along the normal direction on the boundary surface, n represents the unit vector of the normal outside the boundary, and q(·) represents the known flow function on the boundary surface; The third type of boundary is Where h' represents the known hydraulic head function on the boundary; Using the groundwater flow field basic model to simulate and predict the groundwater flow field, and obtaining a first groundwater isowater level map under natural conditions; The numerical model of uranium-coal coordinated mining is used to simulate the regional groundwater flow field during coal mining at different locations, and obtain the third groundwater isowater level line map of the simulation area; including: Determining the maximum distance between the uranium mining area and the coal mine boundary; drawing a circle with the uranium mining area as the center and the maximum distance as the radius; dividing the obtained circle evenly to obtain a preset number of sectors with a central angle of N, each sector corresponding to an orientation; simulating the regional groundwater flow field during coal mining at orientations corresponding to different central angles to obtain a third groundwater isowater level map of the simulated area; Determining the optimal avoidance orientation for coordinated mining of uranium-coal allotropic symbiotic deposits based on the first groundwater isowater map, the third groundwater isowater map, and the coal mining groundwater numerical model; comprising: The coal mining groundwater numerical model is used to simulate the regional groundwater flow field during coal mining at the orientation corresponding to the first central angle, and a current groundwater isowater line map of the simulation area is obtained; the current groundwater isowater line map is compared with the first groundwater isowater line map to determine the first orientation at which the water level in the uranium mining area drops the least; whether the central angle of the sector corresponding to the first orientation is the same as N is detected; if the central angle of the sector corresponding to the first orientation is different from N, the coal mining groundwater isowater line map is used on both sides of the sector corresponding to the first orientation. The numerical model simulates the regional groundwater flow field during coal mining at the orientation corresponding to the second central angle to obtain a current groundwater isolevel map of the simulation area, and jumps to the step of "comparing the current groundwater isolevel map with the first groundwater isolevel map to determine the first orientation at which the water level in the uranium mining area drops the least." The process continues until the central angle of the sector corresponding to the first orientation is the same as N, whereupon the first orientation determined in the current cycle is determined as the optimal avoidance orientation for coordinated mining of uranium-coal allomorphic symbiotic deposits, and the second central angle is smaller than the first central angle. Based on the optimal avoidance orientation, a numerical model of uranium-coal coordinated mining is used to simulate the groundwater flow field during uranium mining at different preset distances to determine the optimal avoidance distance for coordinated mining of uranium-coal paragenetic deposits; including: Concentric circles of the circle are drawn at the optimal avoidance direction with a preset distance as the interval radius; on the boundary of each concentric circle, the groundwater flow field during uranium mining at different preset distances is simulated using the uranium-coal coordinated mining numerical model to obtain a corresponding fourth groundwater isowater level map; the isowater level map in the fourth groundwater isowater level map that is closest to the limit groundwater level for uranium in situ leaching mining is used as the target isowater level map; the radius of the concentric circle corresponding to the target isowater level map is used as the optimal avoidance distance for the coordinated mining of uranium-coal heterogeneous paragenetic deposits to determine the optimal avoidance distance for the coordinated mining of uranium-coal heterogeneous paragenetic deposits.

2. The method for determining the avoidance distance for coordinated mining of uranium-coal heterogeneous ore deposits according to claim 1 is characterized in that: The first central angle is 90°, and the second central angle is 1 / 2 of the first central angle.

3. A device for determining the avoidance distance for coordinated mining of uranium-coal heterogeneous ore deposits, characterized in that: include: The model building module is used to establish the basic groundwater flow field model of uranium-coal paragenetic deposits, the groundwater numerical model of coal mining, and the numerical model of uranium-coal coordinated mining; the basic groundwater flow field model is: Among them, K xx represents the permeability coefficient in the x direction, K yy represents the permeability coefficient in the y direction, K zz represents the permeability coefficient in the z direction, h represents the water level of the aquifer, ω represents the volume of groundwater flowing out or inflowing per unit volume of the aquifer per unit time, S s represents the water storage coefficient, and t represents the time; The groundwater flow field basic model includes three types of boundaries, of which the first type of boundary is h'(x,y,z,t)=h0(x,y,z,t), (x,y,z)∈s; Where h'(·) represents the water level distribution on the boundary area, H0(·) represents the initial water level distribution on the boundary area, and s represents the boundary surface of the three-dimensional region; The second type of boundary is Where k represents the permeability coefficient along the normal direction on the boundary surface, n represents the unit vector of the normal outside the boundary, and q(·) represents the known flow function on the boundary surface; The third type of boundary is Where h' represents the known hydraulic head function on the boundary; a simulation module for using the basic groundwater flow field model to simulate and predict the groundwater flow field, and obtaining a first groundwater isowater level map under a natural state; using a numerical model for coordinated uranium-coal mining to simulate the regional groundwater flow field during coal mining at different orientations, and obtaining a third groundwater isowater level map for the simulation area; a simulation module for determining the maximum distance between the uranium mining area and the coal mine boundary; drawing a circle with the uranium mining area as the center and the maximum distance as the radius; dividing the obtained circle evenly to obtain a preset number of sectors with a central angle of N, each sector corresponding to an orientation; simulating the regional groundwater flow field during coal mining at orientations corresponding to different central angles, and obtaining a third groundwater isowater level map for the simulation area; A calculation module is used to determine the optimal avoidance orientation for coordinated mining of uranium-coal heterogeneous symbiotic deposits based on the first groundwater isowater level map, the third groundwater isowater level map, and the coal mining groundwater numerical model; a calculation module is used to simulate the regional groundwater flow field during coal mining at the orientation corresponding to the first central angle using the coal mining groundwater numerical model to obtain a current groundwater isowater level map of the simulation area; the current groundwater isowater level map is compared with the first groundwater isowater level map to determine the first orientation at which the water level in the uranium mining area drops the least; detect whether the central angle of the sector corresponding to the first orientation is the same as N; if the central angle of the sector corresponding to the first orientation is the same as N, When the central angle of the sector is different from N, the groundwater numerical model for coal mining is used on both sides of the sector corresponding to the first orientation to simulate the regional groundwater flow field during coal mining at the orientation corresponding to the second central angle, respectively, to obtain a current groundwater isolevel map of the simulation area, and jump to the step of "comparing the current groundwater isolevel map with the first groundwater isolevel map to determine the first orientation at which the water level in the uranium mining area drops the least." The process continues until the central angle of the sector corresponding to the first orientation is the same as N, whereupon the first orientation determined in the current cycle is defined as the optimal avoidance orientation for coordinated mining of uranium-coal allomorphic symbiotic deposits, and the second central angle is smaller than the first central angle. The calculation module is also used to simulate the groundwater flow field during uranium mining at different preset distances based on the optimal avoidance orientation using the uranium-coal coordinated mining numerical model, and determine the optimal avoidance distance for the coordinated mining of uranium-coal heterogeneous symbiotic deposits; the calculation module is also used to draw concentric circles of the circle with the preset distance as the interval radius on the optimal avoidance orientation; on the boundary of each concentric circle, simulate the groundwater flow field during uranium mining at different preset distances using the uranium-coal coordinated mining numerical model, and obtain the corresponding fourth groundwater isowater level map; the isowater level map in the fourth groundwater isowater level map that is closest to the limit groundwater level of uranium in situ leaching mining is used as the target isowater level map; the radius of the concentric circle corresponding to the target isowater level map is used as the optimal avoidance distance for the coordinated mining of uranium-coal heterogeneous symbiotic deposits to determine the optimal avoidance distance for the coordinated mining of uranium-coal heterogeneous symbiotic deposits.

4. A terminal comprising a memory and a processor, wherein the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory, characterized in that: When the processor executes the computer program, the steps of the method for determining the avoidance distance for coordinated mining of uranium-coal heterogeneous coexisting deposits as described in claim 1 or 2 are implemented.

5. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the method for determining the avoidance distance for coordinated mining of uranium-coal heterogeneous coexisting deposits as described in claim 1 or 2 are implemented.

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