Method for planning and designing water conservancy project stockyard mining based on 3DE platform

Abstract

The present application relates to the field of water conservancy and hydropower engineering, in order to improve the quality and efficiency of the planning and design of the material field, provide a method for planning and designing the material field of the hydropower engineering based on 3DE platform, including: step 1, obtaining the three-dimensional terrain model of the material field area; Step 2, obtain the final mining platform elevation of the material field slope excavation; Step 3, create the sweep reference line of the material field slope excavation cutting surface at the final mining bottom elevation; Step 4, create the slope line based on the sweep reference line; Step 5, create the total model of the material field slope excavation based on the sweep reference line and the slope line. The above steps can improve the quality and efficiency of the planning and design of the material field.

Description

Technical Field

[0001] This invention relates to the field of water conservancy and hydropower engineering, and in particular to a method for planning and designing the mining of hydropower project material yards based on a 3DE platform. Background Technology

[0002] Currently, several large-scale water conservancy and hydropower projects are under construction or planned in the high mountain and canyon areas of southwest China, such as Shuangjiangkou, Rumei, Mardang, Yebatan, and Xulong. These water conservancy and hydropower projects are located in high mountains and canyons, with steep slopes on both sides of the riverbed, complex geological conditions, and significant differences in engineering. The mountain shapes in the high mountain and canyon areas are extremely irregular, making the overall three-dimensional modeling and planning design of the material yard slope excavation extremely difficult.

[0003] Existing technologies mainly use CATIA software or CIVIL 3D to model the overall three-dimensional model of the material yard excavation, but they have the following shortcomings:

[0004] The process of establishing the three-dimensional overall model of the material yard excavation was rather rough and not standardized. It relied on trial and error by human selection, which was highly subjective. The slopes and hillsides of the material yard were extremely irregular, which made it easy for errors to occur during the material yard modeling process, greatly affecting the design efficiency.

[0005] The three-dimensional overall model design of the material yard excavation is not accurate enough. In order to meet the engineering requirements, the planned mining volume is generally designed to be too large, which invisibly increases the project investment and land occupation.

[0006] The plan only achieved a rough estimate that the total amount of material excavation needed to meet the requirements. The material yard planning and mining design method was not systematic and complete enough. It was impossible to obtain important information such as the phased excavation elevation, phased excavation intensity, slope excavation descent rate, and slope support engineering volume, which made it difficult to meet the actual design and on-site construction needs of the project. Summary of the Invention

[0007] To improve the quality and efficiency of material yard mining planning and design, and to refine the design methodology, this application provides a method for planning and designing hydropower engineering material yard mining based on the 3DE platform.

[0008] The technical solution adopted by the present invention to solve the above problems is:

[0009] A method for planning and designing the mining of hydropower project material yards based on the 3DE platform, including:

[0010] Step 1: Obtain a 3D terrain model of the area where the material storage site is located;

[0011] Step 2: Obtain the final mining platform elevation of the material yard slope excavation;

[0012] Step 3: Create a sweeping baseline for the excavation and cutting surface of the material yard slope at the final bottom elevation;

[0013] Step 4: Create slope lines based on the sweep baseline;

[0014] Step 5: Create a general model of the material yard slope excavation based on the sweep baseline and slope line.

[0015] Further, step 4 specifically involves: using the outermost endpoint of the sweep baseline to create a surface perpendicular to the sweep baseline, and using this endpoint as the projection point to create a slope line.

[0016] To improve the accuracy of the model design and facilitate model adjustments, step 5, after establishing the overall model of the material yard slope excavation, also includes model adjustment.

[0017] Further, in step 3, the sweeping baseline is a three-segment line, which includes a first segmented line, a second segmented line, and a third segmented line connected in sequence. The intersection of the first segmented line and the second segmented line is the first inflection point. The parameters of the three-segment line are defined as a first position parameter, a second position parameter, a first rotation parameter, a second rotation parameter, a third rotation parameter, and a body shape parameter. The first position parameter and the second position parameter are used to determine the horizontal and vertical distances between the first inflection point and the reference point, respectively. The first rotation parameter is used to determine the angle between the first segmented line and the second segmented line. The second rotation parameter is used to determine the angle between the second segmented line and the third segmented line. The third rotation parameter is used to determine the angle between the first segmented line and the reference line that vertically passes through the reference point. The body shape parameter is used to determine the length of the second segmented line.

[0018] Furthermore, in step 5, the model adjustment steps are as follows:

[0019] Step 51: While keeping other parameters of the sweep baseline unchanged, continuously adjust the position of the first inflection point until a suitable overall position is determined. The criteria for determining a suitable overall position are: the slope excavation model has no voids, no large isolation zones, and the slope excavation surface is continuous and smooth.

[0020] Step 52: Optimize and adjust the first position parameter, the second position parameter, the first rotation parameter, the second rotation parameter, the third rotation parameter, and the shape parameter until the overall model of the material yard slope excavation meets the design requirements, that is, the amount of usable material excavation is exactly equal to the amount of usable material required, so as to achieve the purpose of accurate design and determine the final sweep baseline.

[0021] To facilitate obtaining the total excavation volume, step 1, after obtaining the three-dimensional terrain model, further includes: establishing the boundary surface between useful materials and unused materials; step 5, after creating the overall model of the material yard slope excavation, further includes: dividing the overall model of the material yard slope excavation into a three-dimensional model with useful materials and a three-dimensional model without used materials according to the boundary surface between useful materials and unused materials.

[0022] To improve excavation accuracy, step 6 is also included: designing the material yard excavation based on step zoning.

[0023] Further, step 6 includes:

[0024] Step 61: Create n-layer step dividing planes W1, W2, W3, ..., W along the slope line of the material 3D model. n ;

[0025] Step 62: Use steps to divide planes W1, W2, ..., W n By segmenting the 3D model of the useful material, the excavation model entity is created, resulting in the useful material V1, V2, ..., V1 from the material yard excavation. n ;

[0026] Step 63: Determine if materials V1, V2, ..., V are used. n Does it meet the requirements?

[0027] Enter the required quantities of materials to be used directly in sequence: VX1, VX2, ..., VX n Calculate the matching rates V1 / VX1, V2 / VX2, ..., V in sequence between excavation intensity and the demand for direct utilization of usable materials. n / VX n ;

[0028] If the matching rates are V1 / VX1, V2 / VX2, ..., V n / VX n If all values ​​are greater than 1, then the usable material in each step of the material yard slope meets the strength requirements of the usable material;

[0029] If the matching rates are V1 / VX1, V2 / VX2, ..., V n / VX n If all values ​​cannot be greater than 1, the step height or the overall model of the material yard slope excavation needs to be continuously optimized and adjusted according to the excavation situation of the material yard until the strength requirements for the use of materials are met.

[0030] To facilitate phased control of the material yard excavation, step 7 is also included: calculating the phased excavation descent height H of the material yard. i .

[0031] Furthermore, the material yard was excavated in stages, with the height H decreasing. i The calculation method is as follows:

[0032] Step 71: Let A be the descent height of the slope excavation in the i-th stage of the material yard. i Based on A i Calculate the maximum excavation volume, A i This represents the difference between the initial estimated top elevation of the required excavation area and the estimated bottom elevation of the excavation area;

[0033] Step 72: Calculate the difference B between the target excavation volume and the maximum excavation volume. i According to the difference Bi Adjust the current excavation height and calculate the maximum excavation volume of the material yard under the new excavation height;

[0034] Step 73: Repeat step 72 until the calculated excavation volume meets the required strength of the material yard slope at the current stage.

[0035] The advantages of this invention compared to the prior art are:

[0036] 1. This application establishes a general model of the material yard slope excavation by designing a sweeping baseline and cutting the three-dimensional terrain model along the sweeping baseline using slope lines, thus realizing rapid three-dimensional modeling of the material yard.

[0037] 2. Parametric design of the sweep baseline facilitates model adjustment; the sweep baseline adopts a three-segment line, which improves design quality and efficiency and reduces the error rate of material yard modeling.

[0038] 3. A method for matching the excavation intensity of the material yard with the steps is proposed, which ensures that the excavation intensity of the material yard meets the design requirements. The material yard excavation design based on the step zoning can obtain the total excavation volume, the total amount of useful material, and the total amount of unused material while meeting the design requirements, and also obtain the layered excavation intensity, thereby greatly improving the efficiency of material yard mining planning and design.

[0039] 4. It can quickly and automatically calculate the sequence of descent heights for excavation of material yard slopes based on actual material demand intensity, providing an important basis for engineering construction organization design. Attached Figure Description

[0040] Figure 1 A flowchart of a hydropower project material yard mining planning and design method based on the 3DE platform;

[0041] Figure 2 This is a schematic diagram of a 3D terrain model;

[0042] Figure 3 A 3D terrain model of a material yard with a boundary between material usage and non-material usage;

[0043] Figure 4 This is a schematic diagram of the sweep baseline;

[0044] Figure 5 This is a schematic diagram of the slope line;

[0045] Figure 6 This is a schematic diagram of the overall model for the excavation of the material yard slope;

[0046] Figure 7 This is a schematic diagram of the sweep baseline structure;

[0047] Figure 8 A schematic diagram of the stepped area;

[0048] Figure 9 This is the final 3D model of the material yard slope after excavation;

[0049] Attached Figures: 1. Material Used; 2. Material Not Used; 3. Sweep Baseline; 4. Slope Line; 5. Overall Model of Slope Excavation in the Material Yard; 6. Cutting Surface of the Slope in the Material Yard; 7. First Broken Line; 8. Second Broken Line; 9. Third Broken Line; 10. First Inflection Point; 11. Reference Point. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0051] like Figure 1 As shown, the planning and design method for hydropower engineering material yard mining based on the 3DE platform includes:

[0052] Step 1: Obtain a 3D terrain model of the area where the material storage site is located;

[0053] Step 2: Obtain the final mining platform elevation of the material yard slope excavation;

[0054] Step 3: Create a sweeping baseline for the excavation and cutting surface of the material yard slope at the final bottom elevation;

[0055] Step 4: Create slope lines based on the sweep baseline;

[0056] Step 5: Create a general model of the material yard slope excavation based on the sweep baseline and slope line.

[0057] Further, step 4 specifically involves: using the outermost endpoint of the sweep baseline to create a surface perpendicular to the sweep baseline, and using this endpoint as the projection point to create a slope line.

[0058] To improve the accuracy of the model design, step 5, after establishing the overall model of the material yard slope excavation, also includes model adjustment.

[0059] Further, in step 3, the sweeping baseline is a three-segment line, which includes a first segmented line, a second segmented line, and a third segmented line connected in sequence. The intersection of the first segmented line and the second segmented line is the first inflection point. The parameters of the three-segment line are defined as a first position parameter, a second position parameter, a first rotation parameter, a second rotation parameter, a third rotation parameter, and a body shape parameter. The first position parameter and the second position parameter are used to determine the horizontal and vertical distances between the first inflection point and the reference point, respectively. The first rotation parameter is used to determine the angle between the first segmented line and the second segmented line. The second rotation parameter is used to determine the angle between the second segmented line and the third segmented line. The third rotation parameter is used to determine the angle between the first segmented line and the reference line that vertically passes through the reference point. The body shape parameter is used to determine the length of the second segmented line.

[0060] Furthermore, in step 5, the model adjustment steps are as follows:

[0061] Step 51: With other parameters of the sweep baseline unchanged, continuously adjust the position of the first inflection point until a suitable overall position is determined. The criteria for determining a suitable overall position are: the slope excavation model has no voids, no large isolation zones, and the slope excavation surface is continuous and smooth.

[0062] Step 52: Optimize and adjust the first position parameter, the second position parameter, the first rotation parameter, the second rotation parameter, the third rotation parameter, and the shape parameter until the overall model of the material yard slope excavation meets the design requirements, that is, the amount of usable material excavation is exactly equal to the amount of usable material required, so as to achieve the purpose of accurate design and determine the final sweep baseline.

[0063] To facilitate obtaining the total excavation volume, step 1, after obtaining the three-dimensional terrain model, further includes: establishing the boundary surface between useful materials and unused materials; step 5, after creating the overall model of the material yard slope excavation, further includes: dividing the overall model of the material yard slope excavation into a three-dimensional model with useful materials and a three-dimensional model without used materials according to the boundary surface between useful materials and unused materials.

[0064] To improve excavation accuracy, step 6 is also included: designing the material yard excavation based on step zoning.

[0065] Further, step 6 includes:

[0066] Step 61: Create n-layer step dividing planes W1, W2, W3, ..., W along the slope line of the material 3D model. n ;

[0067] Step 62: Use steps to divide planes W1, W2, ..., W n By segmenting the 3D model of the useful material, the excavation model entity is created, resulting in the useful material V1, V2, ..., V1 from the material yard excavation. n ;

[0068] Step 63: Determine if materials V1, V2, ..., V are used. n Does it meet the requirements?

[0069] Enter the required quantities of materials to be used directly in sequence: VX1, VX2, ..., VX n Calculate the matching rates V1 / VX1, V2 / VX2, ..., V in sequence between excavation intensity and the demand for direct utilization of usable materials. n / VX n ;

[0070] If the matching rates are V1 / VX1, V2 / VX2, ..., V n / VX n If all values ​​are greater than 1, then the usable material in each step of the material yard slope meets the strength requirements of the usable material;

[0071] If the matching rates are V1 / VX1, V2 / VX2, ..., V n / VX n If all values ​​cannot be greater than 1, the step height or the overall model of the material yard slope excavation needs to be continuously optimized and adjusted according to the excavation situation of the material yard until the strength requirements for the use of materials are met.

[0072] To facilitate phased control of the material yard excavation, step 7 is also included: calculating the phased excavation descent height H of the material yard. i .

[0073] Furthermore, the material yard was excavated in stages, with the height H decreasing. i The calculation method is as follows:

[0074] Step 71: Let A be the descent height of the slope excavation in the i-th stage of the material yard. i Based on A i Calculate the maximum excavation volume, A i This represents the difference between the initial estimated top elevation of the required excavation area and the estimated bottom elevation of the excavation area;

[0075] Step 72: Calculate the difference B between the target excavation volume and the maximum excavation volume. i According to the difference B i Adjust the current excavation height and calculate the maximum excavation volume of the material yard under the new excavation height;

[0076] Step 73: Repeat step 72 until the calculated excavation volume meets the required strength of the material yard slope at the current stage.

[0077] Example 1

[0078] A method for planning and designing the mining of hydropower project material yards based on the 3DE platform, including:

[0079] Step 1: Generate a 3D terrain model of the material storage area using terrain point clouds, such as... Figure 2 As shown; to facilitate the later acquisition of the total amount of usable and unusable materials, based on geological information such as borehole and occurrence data, and combined with the experience of geological professionals, a boundary surface between usable and unusable materials, as well as other geological interfaces, is established. Using the segmentation function of the 3DE platform, a three-dimensional terrain model of the material yard with the interface between usable material 1 and unusable material 2 is obtained, as shown. Figure 3 As shown.

[0080] Step 2: Taking into account factors such as river flood control, construction road layout, and river management lines, determine the final mining platform elevation H for the material yard slope excavation. Z .

[0081] Step 3: Create a sweeping baseline 3 for the excavation and cutting surface of the material yard slope at the final bottom elevation, such as... Figure 4 As shown; the sweeping baseline 3 is a trapezoid without a bottom base, and the length of the waist line of the trapezoid must exceed the area of ​​the three-dimensional mountain model to ensure that there are no errors in the model excavation and sweeping modeling process.

[0082] Step 4: Create slope line 4 based on sweep baseline 3; specifically, using the outermost endpoint of sweep baseline 3, create a surface perpendicular to sweep baseline 3, and use this endpoint as the projection point to create slope line 4. Slope line 4 can also be created at other locations along sweep baseline 3. Slope line 4 includes parameters such as slope ratio, step height, and walkway width; for example... Figure 5 As shown.

[0083] Step 5: Create the overall model 5 of the material yard slope excavation based on the swept baseline 3 and the slope line 4: Sweep the slope line 4 along the swept baseline 3 to form a swept surface, and merge it with the closed surface of the bottom swept baseline to form the material yard slope cutting surface 6. Using the material yard slope cutting surface 6, use the split command to divide the mountain model to obtain the overall model 5 of the material yard slope excavation. Figure 6 As shown.

[0084] Furthermore, by utilizing the boundary surface between useful and useless materials, the overall model of the material yard slope excavation can be divided using the segmentation command to obtain a three-dimensional model of useful materials and a three-dimensional model of useless materials. In turn, the total excavation volume of useful materials, the total excavation volume of useless materials, and the total excavation volume of the material yard can be obtained.

[0085] Example 2

[0086] Based on Example 1, in order to obtain a more accurate design model, step 5 also includes model adjustment after establishing the overall model of the material yard slope excavation.

[0087] To facilitate model adjustments, the sweep baseline is parametrically designed, such as... Figure 7As shown, the sweeping baseline is a three-segment line, which includes a first segmented line 7, a second segmented line 8, and a third segmented line 9 connected in sequence. The intersection of the first segmented line 7 and the second segmented line 8 is the first inflection point 10. The parameters defining the three-segment line include a first position parameter e, a second position parameter d, a first rotation parameter a, a second rotation parameter b, a third rotation parameter c, and a body shape parameter f. The first position parameter e and the second position parameter d are used to determine the horizontal and vertical distances between the first inflection point 10 and the reference point 11, respectively. The first rotation parameter a is used to determine the angle between the first segmented line 7 and the second segmented line 8. The second rotation parameter b is used to determine the angle between the second segmented line 8 and the third segmented line 9. The third rotation parameter c is used to determine the angle between the first segmented line 7 and the reference line that vertically passes through the reference point 11. The body shape parameter f is used to determine the length of the second segmented line 8.

[0088] The specific steps for model adjustment are as follows:

[0089] Step 51: With other parameters of the sweep baseline unchanged, continuously adjust the position of the first inflection point, that is, adjust the first position parameter e and the second position parameter d, until a suitable overall position is determined; the criteria for determining a suitable overall position are: the slope excavation model has no voids, no large isolation areas, and the slope excavation surface is continuous and smooth.

[0090] Step 52: Optimize and adjust the first position parameter e, the second position parameter d, the first rotation parameter a, the second rotation parameter b, the third rotation parameter c, and the shape parameter f until the overall model of the material yard slope excavation meets the design requirements, that is, the amount of usable material excavation is exactly equal to the amount of usable material required, thus achieving the purpose of accurate design, and determining the final sweep baseline. This embodiment does not limit the specific optimization and adjustment process; the dynamic parameter adjustment optimization process is shown in the table below:

[0091]

[0092] Example 3

[0093] To better meet the needs of the material yard excavation, in addition to embodiment 1 or 2, step 6 is included: designing the material yard excavation based on stepped zoning. In this embodiment, stepped zoning is achieved using slope lines and walkways, such as... Figure 8 As shown, specifically: Step 61, create n-layer step dividing planes W1, W2, W3, ... W along the highest slope line of the 3D model with material to the lowest slope line. n The steps can also be divided according to actual needs;

[0094] Step 62: Use steps to divide planes W1, W2, ..., W nBy segmenting the 3D model of the useful material, the excavation model entity is created, resulting in the useful material V1, V2, ..., V1 from the material yard excavation. n ;

[0095] Step 63: Determine if materials V1, V2, ..., V are used. n Whether the demand is met; this embodiment determines the demand based on the amount of material used, specifically:

[0096] Enter the required quantities of materials to be used directly in sequence: VX1, VX2, ..., VX n Calculate the matching rates V1 / VX1, V2 / VX2, ..., V in sequence between excavation intensity and the demand for direct utilization of usable materials. n / VX n ;

[0097] If the matching rates are V1 / VX1, V2 / VX2, ..., V n / VX n If all values ​​are greater than 1, then the usable material in each step of the material yard slope meets the strength requirements of the usable material;

[0098] If the matching rates are V1 / VX1, V2 / VX2, ..., V n / VX n If all values ​​cannot be greater than 1, the step height or the overall model of the material yard slope excavation needs to be continuously optimized and adjusted based on the excavation situation until the strength requirements for usable materials are met. The final 3D model of the material yard slope after excavation is then determined, as follows: Figure 9 As shown.

[0099] Furthermore, to facilitate the phased control of material yard excavation, step 7 is also included: calculating the phased excavation descent height H of the material yard. i .

[0100] Suppose we need to obtain the descent heights corresponding to k stages of excavation in the material yard. Starting from the known elevation of the material yard, we excavate downwards, and the descent heights are denoted as H1, H2, ..., H... k Based on the phased material demand intensity X1, X2, ..., X k Calculate the descent heights H1, H2, ..., H during the phased excavation of the material yard. k Specifically, for the slope demand intensity of the material yard in the i-th stage (1≤i≤k), the phased excavation lowering height H of the material yard is determined. i The calculation method is as follows:

[0101] Step 71: Let A be the descent height of the slope excavation in the i-th stage of the material yard. i Based on A i Calculate the maximum excavation volume, A i This represents the difference between the initial estimated top elevation of the required excavation area and the estimated bottom elevation of the excavation area;

[0102] Step 72: Calculate the difference B between the target excavation volume and the maximum excavation volume. i According to the difference B i The current excavation height is adjusted, and the maximum excavation volume of the material yard is calculated at the new excavation height. In this embodiment, when adjusting the current excavation height, A is increased or decreased. i Performed in a / 2 manner: when the difference B i If the value is less than 0, it means that too much has been dug, and the current excavation height needs to be reduced by A. i / 2; when the difference B i A value greater than 0 indicates that too little has been excavated, and the current excavation height needs to be increased by A. i / 2; The height adjustment amount can be set according to actual needs;

[0103] Step 73: Repeat step 72 until the calculated excavation volume meets the required strength of the material yard slope at the current stage.

[0104] Assuming that the phased demand intensity is met starting from the top, and the method in this paper is verified in 9 phases, the calculation table of the material yard slope excavation descent height based on the phased demand intensity of the actual material usage in this project is as follows:

[0105] Number of periods Installment demand Slope descent height 1 13927 43 2 17474 18 3 18461 11 4 14118 7 5 17519 7 6 17388 6 7 11971 6 8 19115 8 9 16879 6

Claims

1. A method for planning and designing the mining of hydropower project material yards based on the 3DE platform, characterized in that, include: Step 1: Obtain a 3D terrain model of the area where the material storage site is located; Step 2: Obtain the final mining platform elevation of the material yard slope excavation; Step 3: Create a sweeping baseline for the excavation and cutting surface of the material yard slope at the final mining platform elevation; The sweeping baseline is a three-segment line, comprising a first segmented line, a second segmented line, and a third segmented line connected sequentially. The intersection of the first segmented line and the second segmented line is the first inflection point. The parameters defining the three-segment line include a first position parameter, a second position parameter, a first rotation parameter, a second rotation parameter, a third rotation parameter, and a body shape parameter. The first position parameter and the second position parameter are used to determine the horizontal and vertical distances between the first inflection point and the reference point, respectively. The first rotation parameter is used to determine the angle between the first segmented line and the second segmented line. The second rotation parameter is used to determine the angle between the second segmented line and the third segmented line. The third rotation parameter is used to determine the angle between the first segmented line and the reference line that vertically passes through the reference point. The body shape parameter is used to determine the length of the second segmented line. Step 4: Create a slope line based on the sweep baseline; using the outermost endpoint of the sweep baseline, create a surface perpendicular to the sweep baseline, and use this endpoint as the projection point to create the slope line; Step 5: Create a general model of the material yard slope excavation based on the sweeping baseline and slope line: sweep the slope line along the sweeping baseline to form a sweeping surface, and use the sweeping surface to cut the three-dimensional terrain model to obtain the general model of the material yard slope excavation.

2. The hydropower engineering material yard mining planning and design method based on the 3DE platform according to claim 1, characterized in that, Step 5, after establishing the overall model of the material yard slope excavation, also includes model adjustment.

3. The hydropower engineering material yard mining planning and design method based on the 3DE platform according to claim 1, characterized in that, In step 5, the model adjustment steps are as follows: Step 51: With other parameters of the sweep baseline unchanged, continuously adjust the position of the first inflection point until a suitable overall position is determined; Step 52: Optimize and adjust the first position parameter, the second position parameter, the first rotation parameter, the second rotation parameter, the third rotation parameter, and the body shape parameter to determine the final sweep baseline.

4. The method for planning and designing the mining of hydropower project material yards based on the 3DE platform according to claim 1, characterized in that, Step 1, after obtaining the three-dimensional terrain model, also includes: establishing the boundary surface between useful materials and unused materials; Step 5, after creating the overall model of the material yard slope excavation, also includes: dividing the overall model of the material yard slope excavation into a three-dimensional model with useful materials and a three-dimensional model without used materials according to the boundary surface between useful materials and unused materials.

5. The hydropower engineering material yard mining planning and design method based on the 3DE platform according to claim 4, characterized in that, It also includes step 6, designing the material yard excavation based on step zoning.

6. The hydropower engineering material yard mining planning and design method based on the 3DE platform according to claim 5, characterized in that, Step 6 includes: Step 61: Create n-layer step dividing planes W1, W2, W3, ..., W along the slope line of the material 3D model. n ; Step 62: Use steps to divide planes W1, W2, ..., W n By segmenting the 3D model of the useful material, the excavation model entity is created, resulting in the useful material V1, V2, ..., V1 from the material yard excavation. n ; Step 63: Determine if materials V1, V2, ..., V are used. n Does it meet the requirements? Enter the required quantities of materials to be used directly in sequence: VX1, VX2, ..., VX n Calculate the matching rates between excavation intensity and the direct utilization demand of usable materials in sequence: V1 / VX1, V2 / VX2, ..., V n / VX n ; If the matching rates are V1 / VX1, V2 / VX2, ..., V n / VX n If all values ​​are greater than 1, then the usable material in each step of the material yard slope meets the strength requirements of the usable material; If the matching rates are V1 / VX1, V2 / VX2, ..., V n / VX n If all values ​​cannot be greater than 1, the step height or the overall model of the material yard slope excavation needs to be continuously optimized and adjusted according to the excavation situation of the material yard until the strength requirements for the use of materials are met.

7. The hydropower engineering material yard mining planning and design method based on the 3DE platform according to any one of claims 1-6, characterized in that, It also includes step 7, calculating the staged excavation descent height H of the material yard. i .

8. The hydropower engineering material yard mining planning and design method based on the 3DE platform according to claim 7, characterized in that, Phased excavation of the material yard, with a lowering height H i The calculation method is as follows: Step 71: Let A be the descent height of the slope excavation in the i-th stage of the material yard. i Based on A i Calculate the maximum excavation volume, A i This represents the difference between the initial estimated top elevation of the required excavation area and the estimated bottom elevation of the excavation area; Step 72: Calculate the difference B between the target excavation volume and the maximum excavation volume. i According to the difference B i Adjust the current excavation height and calculate the maximum excavation volume of the material yard under the new excavation height; Step 73: Repeat step 72 until the calculated excavation volume meets the required strength of the material yard slope at the current stage.

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