CN113240812B - A 3D modeling method for ultra-thin manganese ore bodies based on incremental simulation - Google Patents

Abstract

The method comprises the steps of firstly obtaining an upper boundary line and a lower boundary of an ultrathin manganese ore body, then constructing a projection plane according to the upper boundary line, projecting the ultrathin manganese ore body onto the projection plane and extracting the boundary range of the ultrathin manganese ore body on the projection plane; secondly, fitting and generating the bottom surface of the ultrathin manganese ore body model according to the lower boundary line and the boundary range; calculating the thickness increment of the ultrathin manganese ore body according to the upper boundary line and the lower boundary line; then fitting an increment surface of the ultrathin manganese ore body according to the thickness increment and the boundary range of the ultrathin manganese ore body; then projecting the bottom surface of the ultra-thin manganese ore body model onto the incremental surface of the ultra-thin manganese ore body to obtain the top surface of the ultra-thin manganese ore body model; and finally enclosing the bottom surface of the ultra-thin manganese ore body model and the top surface of the ultra-thin manganese ore body model to obtain the ultra-thin manganese ore body model. The problem that the top surface and the bottom surface are intersected or the bottom surface is arranged above the top surface cannot be caused between the top surface and the bottom surface in the ultrathin manganese ore body model obtained by the method.

Description

A 3D modeling method for ultra-thin manganese ore bodies based on incremental simulation

technical field

The invention designs and realizes a three-dimensional modeling method of an ultra-thin manganese ore body based on incremental simulation, which belongs to the field of geological three-dimensional visualization in geoscience information engineering.

Background technique

The 3D modeling and visualization of the deposit is based on surveying, mapping and geological data, and extracts the boundary data of the engineering area and 3D model data, such as surface data, stratigraphic data, lithofacies data, grade data, structural data, etc.; and then uses the surface data to establish digital elevation Model and digital terrain model, use stratigraphic data to establish spatial layers of various layers, use lithofacies data to establish spatial interfaces of various rock bodies, use grade data to establish spatial interfaces of various ore bodies, use structural data to establish various structural planes, and cut other related The process of cutting and arranging various curved surfaces using boundary data, generating surfaces from point and line data, and enclosing the surfaces into a three-dimensional virtual deposit geological model.

At present, the traditional 3D modeling method for 3D modeling of ultra-thin manganese ore bodies uses interpolation to fill in the data gaps between hard data such as drilling holes, exploration lines and profiles. The upper and lower bottom surfaces of the thin manganese ore body are interpolated, and then the three-dimensional model of the ultra-thin manganese ore body is obtained by using the upper and lower bottom surfaces and the enclosed boundary. Due to the closeness, the upper and lower surfaces of the ore body intersect due to interpolation, which leads to the fragmentation of the ultra-thin manganese ore body model, which makes it impossible to truly express the manganese ore body model established in the mining area. certain influence.

SUMMARY OF THE INVENTION

In order to solve the technical problems existing in the above-mentioned prior art, the present invention provides a three-dimensional modeling method of ultra-thin manganese ore body based on incremental simulation. The bottom surface is projected onto the incremental surface of the ultra-thin manganese ore body, so that the height of the top surface of the ultra-thin manganese ore body model in three-dimensional space is greater than the height of the bottom surface of the ultra-thin manganese ore body model; There is no problem of top and bottom intersecting or bottom above top.

The technical solution for realizing the object of the present invention is, a three-dimensional modeling method of ultra-thin manganese ore body based on incremental simulation, comprising the following steps:

(1) Obtain the ore body data of the ultra-thin manganese ore body, and the ore body data includes the upper boundary line and the lower boundary line of the ultra-thin manganese ore body;

(2) Constructing the projection surface according to the upper boundary line in the ore body data, and projecting the ultra-thin manganese ore body on the projection surface, and then extracting the boundary range of the ultra-thin manganese ore body on the projection surface;

(3) According to the lower boundary line in the ore body data and the boundary range of the ultra-thin manganese ore body on the projection surface, the bottom surface of the ultra-thin manganese ore body model is generated by fitting;

(4) Calculate the thickness increment of the ultra-thin manganese ore body according to the upper boundary line and the lower boundary line in the ore body data;

(5) Fitting the incremental surface of the ultra-thin manganese ore body according to the thickness increment of the ultra-thin manganese ore body and the boundary range of the ultra-thin manganese ore body on the projection plane;

(6) projecting the bottom surface of the ultra-thin manganese ore body model onto the incremental surface of the ultra-thin manganese ore body to obtain the top surface of the ultra-thin manganese ore body model;

(7) Enclosing the bottom surface of the ultra-thin manganese ore body model and the top surface of the ultra-thin manganese ore body model to obtain the ultra-thin manganese ore body model.

A further improvement of the above technical solution is that step (1) further includes: using interface visualization technology to perform three-dimensional coordinate correction on the upper and lower boundary lines in the ore body data, and spread them in a three-dimensional space.

And the three-dimensional coordinate correction is specifically: project the left and right images to a common plane parallel to the baseline, and then shift the projected two images on the common plane, so that the polar lines of the projected two images are collinear.

And the construction of the projection surface in step (2) is as follows: copy the upper boundary line in the ore body data twice, and then move the copied upper boundary line to the north, south, or east and west, respectively, using ordinary The kriging interpolation method interpolates the two upper boundary lines after translation and the three upper boundary lines without translation to construct the projection surface.

And the bottom surface of the ultra-thin manganese ore body model in step (3) is obtained by using the triangulation method.

And the thickness increment in step (4) is specifically: the difference between the height value of the upper boundary line in the ore body data in the 3D coordinates and the height value of the lower boundary line in the ore body data in the 3D coordinates.

And the specific steps of fitting the incremental surface of the ultra-thin manganese ore body in step (5) are:

(5.1) Copy the boundary range of the ultra-thin manganese ore body on the projection surface, and set its height value in three-dimensional coordinates to 0;

(5.2) and draw the enclosing coil outside the boundary range, and set the height value of the enclosing coil in three-dimensional coordinates to a value less than 0;

(5.3) Interpolate the thickness increment of the ultra-thin manganese ore body, the boundary range in step (5.1), and the surrounding coil in step (5.2) according to ordinary kriging interpolation to construct the incremental surface of the ultra-thin manganese ore body.

It can be seen from the above technical solutions: (1) in the three-dimensional modeling method of the ultra-thin manganese ore body based on incremental simulation provided by the present invention, the range of the bottom surface of the ultra-thin manganese ore body model and the incremental surface of the ultra-thin manganese ore body are all determined by the ultra-thin manganese ore body. The boundary range of the manganese ore body on the projection surface is limited, and the top surface of the ultra-thin manganese ore body model is obtained by projecting the bottom surface of the ultra-thin manganese ore body model to the incremental surface of the ultra-thin manganese ore body, so the top surface of the ultra-thin manganese ore body model is obtained. The surface and the bottom surface of the ultra-thin manganese ore body model are in the same range, which avoids the problem of incompatibility between the range size and position between the top surface of the ultra-thin manganese ore body model and the bottom surface of the ultra-thin manganese ore body model;

(2) The top surface of the ultra-thin manganese ore body model is actually the sum of the bottom surface of the ultra-thin manganese ore body model and the incremental surface of the ultra-thin manganese ore body. The height of the top surface of the body model in three-dimensional space is greater than the height of the bottom surface of the ultra-thin manganese ore body model; therefore, in the obtained ultra-thin manganese ore body model, the top surface and the bottom surface will not intersect the top surface and the bottom surface or the bottom surface will not be on the top surface. above problem.

Description of drawings

1 is a schematic diagram of an ultra-thin manganese ore body projected onto a projection surface in an embodiment of the present invention;

2 is a schematic diagram of an upper boundary line and a lower boundary line of ore body data in an embodiment of the present invention;

Fig. 3 is the bottom surface schematic diagram of the ultra-thin manganese ore body model in the embodiment of the present invention;

Fig. 4 is the top surface schematic diagram of the ultra-thin manganese ore body model in the embodiment of the present invention;

5 is a schematic diagram of an ultra-thin manganese ore body model in an embodiment of the present invention.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and embodiments, and the content of the present invention is not limited to the following embodiments.

A three-dimensional modeling method of ultra-thin manganese ore body based on incremental simulation, comprising the following steps:

Obtain the ore body data of the ultra-thin manganese ore body. The ore body data includes the upper boundary line and the lower boundary line of the ultra-thin manganese ore body. The upper boundary line and the lower boundary line are not a single straight line on the plane position, but show the lower part of the ultra-thin manganese ore body or the lower boundary line. A series of lines at the upper spatial form position, through the upper and lower boundary lines, the approximate shape of the ultra-thin manganese ore body can be seen, but it cannot replace the role of the geological model.

Using interface visualization technology, the upper and lower boundary lines in the ore body data are corrected in 3D coordinates and distributed in the 3D space; the coordinate values of the upper and lower boundary lines in the 3D coordinates are obtained to facilitate the subsequent calculation of thickness increments.

The three-dimensional coordinate correction method used in this embodiment is actually a stereoscopic image correction method in binocular stereo vision. The application process in this embodiment is: project the left and right images on a common plane parallel to the baseline, and then project the The latter two images are shifted on the common plane, so that the epipolar lines of the latter two images are collinear.

Referring to Figure 1, a projection surface is constructed according to the upper boundary line in the ore body data. The projection surface is the light-colored grid surface in Figure 1, and the ultra-thin manganese ore body is projected onto the projection surface, and then the ultra-thin manganese ore body is extracted on the projection surface. The boundary range on the surface, the boundary range is the area selected by the dark line in Figure 1; the specific process is to copy the upper boundary line in the ore body data twice, and then copy the upper boundary line to the north, Translate to the south or to the east and west, and in other embodiments, it can also be translated in other directions, as long as the two directions of the translation are opposite, use the ordinary kriging interpolation method to translate the two upper bounds after the translation. The three upper boundary lines of the line and the untranslated upper boundary line are interpolated to construct the projection surface.

Referring to Fig. 3, according to the lower boundary line in the ore body data and the boundary range of the ultra-thin manganese ore body on the projection surface, the bottom surface of the ultra-thin manganese ore body model is fitted and generated. In this embodiment, the triangulation method is used to generate and generate the ultra-thin manganese ore body model. the bottom surface; the specific steps are as follows:

(1) Discrete the underground boundary line into elevation control points in three-dimensional space;

(2) Construct a super triangle, including all elevation control points, and put it into the triangle linked list;

(3) Insert the elevation control points in the point set in turn, find the triangle whose circumcircle contains the insertion point in the triangle linked list, this triangle is the influence triangle of this point, delete the common side of the influence triangle, and make the insertion point the same as the influence triangle. All vertices are connected to complete the insertion of a point in the triangle linked list;

(4) Optimize the locally newly formed triangle according to the optimization criterion, and put the formed triangle into the triangle linked list;

(5) Execute the above step (3) in a loop until all the elevation control points are inserted, and the terrain surface is obtained;

(6) Remove the topographic surface outside the boundary range of the ultra-thin manganese ore body on the projection plane to obtain the bottom surface of the ultra-thin manganese ore body model.

Referring to Figure 2, the thickness increment of the ultra-thin manganese ore body is calculated according to the upper and lower boundary lines in the ore body data; the upper boundary line is the dark line segment in Figure 2, and the lower boundary line is the light-colored line segment in Figure 2. The thickness increment is the area between the dark and light colored line segments in Figure 2.

The thickness increment is essentially the difference between the height value of the upper boundary line in the ore body data in the 3D coordinates and the height value of the lower boundary line in the ore body data in the 3D coordinates.

According to the thickness increment of the ultra-thin manganese ore body and the boundary range of the ultra-thin manganese ore body on the projection plane, the incremental surface of the ultra-thin manganese ore body is fitted; the specific steps of fitting the incremental surface of the ultra-thin manganese ore body are as follows:

Copy the boundary range of the ultra-thin manganese ore body on the projection surface, and set its height value in 3D coordinates to 0;

And draw the enclosing coil outside the bounding range, and set the height value of the enclosing coil in three-dimensional coordinates to a value less than 0;

The increment surface of the ultra-thin manganese ore body is constructed by interpolating the thickness increment of the ultra-thin manganese ore body, the boundary range in the above step, and the enclosing coil in the above step according to ordinary kriging interpolation.

The surrounding coil with a negative height value indicates that the increment of manganese ore body beyond the boundary range does not exist, and the surrounding coil is used to control the boundary range of the incremental surface;

Although the boundary range of the incremental surface is defined by the surrounding coils with a negative height value, the surrounding coils are actually the coils outside the boundary range of the ultra-thin manganese ore body on the projection surface. The range of the measurement surface is limited by the boundary range of the ultra-thin manganese ore body on the projection surface.

Referring to Figure 4, the bottom surface of the ultra-thin manganese ore body model is projected onto the incremental surface of the ultra-thin manganese ore body to obtain the top surface of the ultra-thin manganese ore body model; thus the bottom surface of the ultra-thin manganese ore body model and the incremental surface of the ultra-thin manganese ore body are obtained. The range is limited by the boundary range of the ultra-thin manganese ore body on the projection surface, and the top surface of the ultra-thin manganese ore body model is obtained by projecting the bottom surface of the ultra-thin manganese ore body model to the incremental surface of the ultra-thin manganese ore body, so The top surface of the ultra-thin manganese ore body model and the bottom surface of the ultra-thin manganese ore body model are in the same range, which avoids the problem of incompatibility between the range size and position between the top surface of the ultra-thin manganese ore body model and the bottom surface of the ultra-thin manganese ore body model. .

Referring to FIG. 5 , the bottom surface of the ultra-thin manganese ore body model and the top surface of the ultra-thin manganese ore body model are enclosed to obtain the ultra-thin manganese ore body model.

It can be seen from the above examples that the top surface of the ultra-thin manganese ore body model is actually the sum of the bottom surface of the ultra-thin manganese ore body model and the incremental surface of the ultra-thin manganese ore body. The height of the top surface of the ultra-thin manganese ore body model in three-dimensional space is greater than the height of the bottom surface of the ultra-thin manganese ore body model; therefore, in the obtained ultra-thin manganese ore body model, the top surface and the bottom surface do not produce top surface and bottom surface intersection or The bottom surface is above the top surface.

Claims (6)

1. an ultra-thin manganese ore body three-dimensional modeling method based on incremental simulation, is characterized in that comprising the following steps: (1) Obtain the ore body data of the ultra-thin manganese ore body, and the ore body data includes the upper and lower boundary lines of the ultra-thin manganese ore body; (2) Construct the projection surface according to the upper boundary line in the ore body data, and project the ultra-thin manganese ore body onto the projection surface, and then extract the boundary range of the ultra-thin manganese ore body on the projection surface; (3) According to the lower boundary line in the ore body data and the boundary range of the ultra-thin manganese ore body on the projection plane, the bottom surface of the ultra-thin manganese ore body model is generated by fitting; (4) Calculate the thickness increment of the ultra-thin manganese ore body according to the upper boundary line and the lower boundary line in the ore body data. The difference between the height values of the lower boundary line in the data in three-dimensional coordinates; (5) Fitting the incremental surface of the ultra-thin manganese ore body according to the thickness increment of the ultra-thin manganese ore body and the boundary range of the ultra-thin manganese ore body on the projection surface; (6) Project the bottom surface of the ultra-thin manganese ore body model to the incremental surface of the ultra-thin manganese ore body to obtain the top surface of the ultra-thin manganese ore body model; (7) The bottom surface of the ultra-thin manganese ore body model and the top surface of the ultra-thin manganese ore body model are enclosed to obtain the ultra-thin manganese ore body model. 2 . The three-dimensional modeling method for ultra-thin manganese ore body based on incremental simulation according to claim 1 , wherein the step (1) further comprises: using interface visualization technology to model the upper and lower edges of the ore body data. 3 . The boundary line is corrected in three-dimensional coordinates and spread in three-dimensional space. 3. The three-dimensional modeling method of the ultra-thin manganese ore body based on incremental simulation according to claim 2, wherein the three-dimensional coordinate correction is specifically: the left and right images are projected to the common plane parallel to the baseline, Then, the two projected images are displaced on the common plane, so that the epipolar lines of the projected two images are collinear. 4 . The three-dimensional modeling method for ultra-thin manganese ore body based on incremental simulation according to claim 1 , wherein the construction of the projection surface in the step (2) is: copying the upper boundary line in the ore body data. 5 . 2 copies, and then translate the copied upper boundary line to the north, south or east and west respectively, and use the ordinary kriging interpolation method to compare the translated upper boundary line and the untranslated upper boundary line. The 3 upper boundary lines are interpolated to construct the projection surface. 5 . The three-dimensional modeling method of the ultra-thin manganese ore body based on incremental simulation according to claim 1 , wherein: in the step (3), the bottom surface of the ultra-thin manganese ore body model is obtained by a triangulation method. 6 . 6 . The three-dimensional modeling method of the ultra-thin manganese ore body based on incremental simulation according to claim 2 , wherein the specific steps of fitting the incremental surface of the ultra-thin manganese ore body in the step (5) are: 6 . (5.1) Copy the boundary range of the ultra-thin manganese ore body on the projection surface, and set its height value in three-dimensional coordinates to 0; (5.2) and draw the enclosing coil outside the boundary range, and set the height value of the enclosing coil in three-dimensional coordinates to a value less than 0; (5.3) Interpolate the thickness increment of the ultra-thin manganese ore body, the boundary range in step (5.1), and the surrounding coil in step (5.2) according to ordinary kriging interpolation to construct the incremental surface of the ultra-thin manganese ore body.

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