An improved method of measuring solution volume in a residue leaching tank

Abstract

The application discloses an improved solution volume measurement method of a residue leaching tank, and comprises the following steps: obtaining the image of a research area by using remote sensing image or unmanned aerial vehicle shooting; registering the image of the research area by using a known measurement control point to obtain a registered image; circumscribing the solution and dry beach boundary control line or control point on the registered image; measuring the solution surface elevation of the residue leaching tank in the field to obtain measurement data, and assigning the elevation of the solution and dry beach boundary control line or control point by using the measurement data; selecting a measurement point, measuring the distance between the solution surface and the solid residue at the bottom of the solution in the residue leaching tank in the field, and calculating the solution bottom elevation of the measurement point; performing three-dimensional modeling of the solution in a three-dimensional software platform according to the solution and dry beach boundary control line or control point and the solution bottom elevation of the measurement point to obtain a three-dimensional model; and estimating the solution volume in the residue leaching tank according to the three-dimensional model. The application can greatly improve the estimation accuracy of the solution volume.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of reservoir capacity determination, and relates to an improved solution volume measurement method for a residue leaching reservoir. BACKGROUND

[0002] Congo (Kinshasa) is a global concentration area of stratabound copper-cobalt deposits. After the formation of copper-cobalt deposits in this area, different degrees of secondary oxidation enrichment are developed due to the influence of tectonism. Oxidized ore bodies have high economic development value due to large thickness, shallow burial and high grade. Oxidized copper-cobalt ore dressing and smelting processing usually adopts a hydrometallurgical process. After crushing and grinding, the oxidized ore enters the acid leaching process, the leaching solution enters the extraction and electrodeposition process, and the leaching residue is discharged into the residue leaching reservoir after countercurrent washing.

[0003] The residue leaching reservoir is an earth-rock dam with an inner laid anti-seepage PE film. Due to the influence of washing efficiency and other factors, the discharged leaching residue contains valuable metals to varying degrees. Most of these metals exist in the form of ions in the solution of the residue leaching reservoir. These metals can be recovered and utilized by making the solution re-enter the production system through the backwater of the residue leaching reservoir. In order to more accurately grasp the total amount of valuable metals, carry out metal balance management of the mining, dressing and smelting system, and scientifically and reasonably plan the backwater amount and carry out water balance management, it is necessary to regularly measure the volume of the solution in the residue leaching reservoir.

[0004] In 2018, an enterprise invented a solution volume measurement method for a residue leaching reservoir. The working principle of the method is that three measurement personnel (one person holds a ruler or measuring rope, one person uses a intercom to communicate with ground personnel, and one person controls the direction by rowing a rubber boat) ride a rubber boat, first measure the solution surface elevation as the reference surface for subsequent measurement, then measure the distance between the solution surface and the bottom of the solid leaching residue at a specific point by using a plumb line, and calculate the bottom surface elevation of the solution at the measurement point. The above measurement process is repeated to obtain a certain number of dispersed bottom surface elevation data of the solution (the basic point distance is set to 50m*50m), and on this basis, three-dimensional modeling is carried out to estimate the volume of the solution. The method can give an approximate solution volume. However, due to the limitation of measurement conditions, the rubber boat with three people cannot be measured in the water area close to the dry beach, otherwise it is easy to cause grounding or too much disturbance to affect the measurement result. In the past, the solution volume of the part that cannot directly measure the bottom surface elevation of the solution is estimated by extrapolation of 10m or 30m based on the known measurement data. Therefore, the method has obvious errors. SUMMARY

[0005] In view of the problems in the prior art, the application provides an improved solution volume measurement method for a residue leaching reservoir, which can greatly improve the accuracy of solution volume estimation.

[0006] Remote sensing or unmanned aerial photography image can provide the solution and dry beach boundary form. As long as the image accuracy meets the work requirements, the actual solution and dry beach boundary position can be accurately mastered after image registration. In the three-dimensional software platform, through the constraint of the solution and dry beach boundary form, the solution three-dimensional modeling and volume estimation accuracy can be greatly improved.

[0007] The application adopts the following technical solutions:

[0008] An improved solution volume measurement method of a residue leaching tank, characterized in that the method comprises the following steps:

[0009] (1) Remote sensing image or unmanned aerial photography is used to obtain the image of the research area; high-resolution remote sensing image is obtained, or the image of the research area is obtained through unmanned aerial photography.

[0010] (2) The image of the research area is registered by using the known measurement control point to obtain the registered image; image registration is performed in the three-dimensional software platform.

[0011] (3) The solution and dry beach boundary control line or control point is circled on the registered image.

[0012] (4) The solution surface elevation of the residue leaching tank is measured in the field to obtain measurement data, and the solution and dry beach boundary control line or control point is assigned an elevation by using the measurement data.

[0013] (5) Measurement points are selected, the distance between the solution surface and the solid residue at the bottom of the solution in the residue leaching tank is measured in the field according to a certain point distance, and the solution bottom elevation of the measurement point is calculated;

[0014] (6) In the three-dimensional software platform, the solution three-dimensional modeling is performed according to the solution and dry beach boundary control line or control point and the solution bottom elevation of the measurement point to obtain a three-dimensional model.

[0015] (7) The solution volume in the residue leaching tank is estimated according to the three-dimensional model.

[0016] Further, in step (5), the measurement points are selected according to a basic point distance of 50m*50m; the distance between the solution surface and the solid residue at the bottom of the solution in the residue leaching tank is measured in the field by using a plumb line to measure the distance between the solution surface and the solid residue at the bottom of the solution at the measurement point, and the solution bottom elevation of the measurement point is calculated, and the above measurement process is repeated to obtain a plurality of dispersed solution bottom elevation data.

[0017] Further, the height of the solution in the residue leaching tank is 0.5m-6.9m.

[0018] Further, multiply the distance between the solution surface and the solid residue at the bottom of the solution by 5 to obtain the corrected solution bottom elevation of the measurement point; divide 5 to restore the solution depth when estimating the solution volume in the residue tank in step (7).

[0019] Further, the three-dimensional software platform in step (6) is Micromine or 3Dmine.

[0020] The beneficial technical effects of the present application: the fundamental problem of the prior art method is that the solution bottom surface of the near beach water area cannot be measured in the field. The present application can ensure the solution bottom surface of the area where field measurement cannot be performed, and can also obtain elevation information through accurate positioning or interpolation, so as to scientifically and accurately perform solution three-dimensional modeling and volume estimation. The present application method has the following advantages: (1) through high-resolution images, the boundary form of the solution and the beach is constrained with high precision; the distance from the artificial measurement point to the boundary of the solution and the beach is controlled by the actual point, avoiding errors caused by artificial extrapolation near the boundary of the solution and the beach. (2) Since the surface boundary control points of the solution are added, the three-dimensional form interpolation of the solution bottom surface near the boundary of the solution and the beach is more accurate. (3) The present application is simple to operate, has less human interference, is highly repeatable, and is easy to popularize. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The improved solution volume measurement flowchart of the residue tank of the present application;

[0022] Figure 2 The high-resolution remote sensing image obtained in Example 1;

[0023] Figure 3 The remote sensing image is registered with known control points in Example 1;

[0024] Figure 4 The process of connecting the solution and beach boundary control lines or control points using the registered remote sensing image in Example 1;

[0025] Figure 5 The planar and three-dimensional distribution of the solution and beach boundary control lines or control points after measuring and assigning elevations to the measurement points in Example 1;

[0026] Figure 6 The modeling process based on the measurement points, solution and beach boundary control lines or control points in Example 1;

[0027] Figure 7 The volume estimation result based on the solution three-dimensional model in Example 1. DETAILED DESCRIPTION

[0028] Figure 1The improved solution volume measurement flowchart of the residue leaching tank;

[0029] Example 1

[0030] High-resolution remote sensing images are acquired to obtain the image of the study area, see Figure 2 .

[0031] In the three-dimensional software platform, the image of the study area is registered by using the known measurement control points, and the picture coordinates are set as local coordinates, see Figure 3 .

[0032] In the three-dimensional software platform, the solution and dry beach boundary control lines or control points in the image are circled, see Figure 4 If the boundary line shown in the image is not clear, the image enhancement method can be used to highlight the key information.

[0033] The solution surface elevation is measured as the reference surface for subsequent measurement, and the measurement data is used to assign elevation to the solution and dry beach boundary control lines or control points, see Table 1, Figure 5 .

[0034] The solution bottom elevation is measured on site according to the basic point distance of 50m x 50m. The specific method is to measure the distance between the solution surface and the solution bottom solid residue at a specific point by using a plumb line, and then calculate the solution bottom elevation of the point. Repeat the above measurement process to obtain a certain number of dispersed solution bottom elevation data, see Table 2, Figure 5 . Since the solution water depth is relatively shallow, ranging from 0.5 to 6.9m, in order to facilitate display in the three-dimensional model, the measured depth is multiplied by 5 times to obtain the corrected solution bottom elevation. When calculating the solution volume subsequently, the solution depth is restored (divided by 5) to obtain the final solution volume.

[0035] In the three-dimensional software platform, the solution three-dimensional modeling is performed by using the solution and dry beach boundary control lines or control points and the solution bottom elevation measurement points, see Figure 6 .

[0036] The estimated solution volume is 1.88 million cubic meters, and the final solution volume after restoring the solution depth is 0.37 million cubic meters, see Figure 7 .

[0037] Table 1 Plane coordinates and elevations of solution and dry beach boundary control lines or control points in Example 1

[0038]

[0039]

[0040]

[0041] Table 2 Actual solution surface, bottom elevation data for Example 1

[0042]

[0043]

Claims

1. An improved method for measuring the volume of a leaching residue tank solution, characterized in that, The method includes the following steps: (1) Use remote sensing images or drones to acquire images of the study area; (2) Register the images of the study area using known measurement control points to obtain the registered images; (3) Delineate the control lines or control points at the boundary between the solution and the dry beach on the registered image; (4) Measure the elevation of the solution surface in the leaching residue tank on site, obtain the measurement data, and use the measurement data to assign elevations to the control lines or control points of the boundary between the solution and the dry beach. (5) Select measurement points according to the basic point spacing of 50m×50m; use a plumb line to measure the distance between the solution surface of the measurement point and the solid slag at the bottom of the solution, and calculate the bottom elevation of the solution at the measurement point. Repeat the above measurement process to obtain multiple scattered bottom elevation data of the solution. Multiply the bottom elevation of the solution at the measurement point by 5 to obtain the corrected bottom elevation of the solution at the measurement point. (6) In the three-dimensional software platform, the solution bottom surface elevation is modeled in three dimensions according to the control line or control point of the solution and the dry beach boundary control line or control point and the measurement point to obtain the three-dimensional model; (7) Estimate the volume of solution in the leaching slag tank based on the three-dimensional model. When estimating the volume of solution in the leaching slag tank, divide by 5 to restore the solution depth.

2. The improved method for measuring the volume of leaching residue solution in a leaching tank according to claim 1, characterized in that, The height of the solution in the leaching tank is 0.5m to 6.9m.

3. The improved method for measuring the volume of leaching residue solution in a leaching tank according to claim 1, characterized in that, In step (6), the 3D software platform is Micromine or 3Dmine.

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