CN-121810804-B - Method for calculating occurrence of hidden ore body at position of drilling ore

CN121810804BCN 121810804 BCN121810804 BCN 121810804BCN-121810804-B

Abstract

The invention is applicable to the technical field of geological detection, and provides a method for calculating the occurrence of a certain drilling site of a hidden ore body, which comprises the following steps of obtaining the space coordinates of a target drilling site and a plurality of adjacent drilling sites; the method comprises the steps of calculating a space distance and an azimuth angle, determining a weight function which adaptively changes along with the distance, generating a set of space coordinates of virtual points corresponding to adjacent drilling holes, sequentially connecting the virtual points into a polygonal curved surface, calculating horizontal projection areas of the curved surface, calculating vertical longitudinal projection areas of the curved surface in different directions, obtaining an inclination angle according to the ratio of the maximum vertical longitudinal projection area to the horizontal projection area, determining the direction corresponding to the maximum vertical longitudinal projection area and the opposite direction, and determining the tendency by comparing the elevation values of the virtual points closest to the two directions. According to the invention, virtual points are connected into the polygonal curved surface, and the morphological change of the ore body in the three-dimensional space is considered, so that the hidden ore body with complex morphology can be better adapted.

Inventors

HUANG TAIPING
HUANG YUE
Chuan Wentao
Zai Xi
XIA JIANFENG
ZHOU JIAN
Mi Yunchuan
DONG TAO
WANG LU
YANG SHUSHENG
WANG FENG
HU QINGHUA

Assignees

云南省地质调查院(云南省地质科学研究院)

Dates

Publication Date: 20260508
Application Date: 20260306

Claims (7)

1. A method of calculating the occurrence of a blind ore body at a borehole site, the method comprising the steps of: obtaining the space coordinates of the target drilling hole at the ore-seeing position , , ) And spatial coordinates of a plurality of adjacent boreholes at a mine site , , ) Subscript n denotes the nth adjacent borehole; calculating the space distance between the target drilling ore finding position and the nth adjacent drilling ore finding position And azimuth angle ; Determining a weight function that varies adaptively with distance Generating a group of space coordinates of virtual points corresponding to each adjacent drilling hole according to the weight function, and respectively weighting the plane position and elevation information of the adjacent drilling holes by the weight function, wherein the plane position weighting considers azimuth angles; Sequentially connecting and closing the virtual points to form a polygonal curved surface, calculating the horizontal projection area of the polygonal curved surface, and calculating the vertical projection areas of the polygonal curved surface in different directions within the range of 0-180 degrees; calculating the inclination angle of the blind ore body at the position of the target drilling visible ore by using an arctangent function according to the ratio of the maximum vertical projection area to the horizontal projection area; Determining a direction corresponding to the maximum vertical projection area and a direction opposite to the direction, and selecting a direction with a smaller elevation value as a tendency of the blind ore body at the target drilling ore-finding position by comparing elevation values of virtual points closest to the two directions; Inverting the theoretical elevation of each adjacent drilling ore-finding position according to the inclination angle and the inclination, comparing with the actual elevation, and if the residual error exceeds the limit, adjusting the parameters of the weight function until the residual error meets the condition; The formula for calculating the space distance and azimuth between the target drilling mineral position and the adjacent drilling mineral position is as follows: , , Representing the spatial distance between the target borehole site and the nth adjacent borehole site, Representing azimuth angles of the target drilling ore-seeing position and the nth adjacent drilling ore-seeing position; the weight function is = , And p is a distance attenuation constant, which is the confidence factor of the nth adjacent borehole, and N adjacent boreholes are all arranged.
2. The method of calculating the occurrence of a bearing at a borehole see location in a blind ore body according to claim 1, wherein the formula for determining the spatial coordinates of the virtual points is as follows: , , +( ) , Wherein, the Respectively representing the abscissa value, the ordinate value and the elevation value of the virtual point corresponding to the nth adjacent drilling hole.
3. The method for calculating the occurrence of a certain borehole in a blind ore body according to claim 2, wherein the formula for calculating the horizontal projection area of the polygonal curved surface is: S level 。
4. The method for calculating the occurrence of a certain borehole in a blind ore body according to claim 2, wherein the rotation of the virtual point is determined when calculating the vertical projection areas of the polygonal curved surface in different directions within the range of 0 ° to 180 ° Abscissa value after angle And longitudinal coordinate values : , , Wherein, the Respectively represent the rotation of the virtual point corresponding to the nth adjacent drilling hole An abscissa value and an ordinate value after the angle.
5. The method of calculating the occurrence of a certain borehole in a blind ore body according to claim 4, wherein the formula for calculating the vertical projection area of the polygonal curved surface is: S vertical 。
6. The method for calculating the occurrence of a certain borehole in a blind ore body according to claim 1, wherein the confidence factor of the adjacent borehole is obtained according to the complete rate of the inclinometry data, which is the ratio of the number of effective inclinometry points above the depth of the borehole in the visible ore, to the number required by the specification, and the coordinate measurement precision level, which is the precision score given according to the measurement technology.
7. The method for calculating the occurrence of a certain borehole in a blind ore body according to claim 1, wherein the step of inverting the theoretical elevation of each adjacent borehole in accordance with the inclination angle and the inclination comprises the steps of establishing a local geological plane equation of the depth of the observation of the certain borehole in terms of spatial coordinates , , ) The normal vector of the plane is determined by the inclination theta and the inclination alpha, and the theoretical elevation corresponding to the adjacent drilling points is obtained according to a plane equation.

Description

Method for calculating occurrence of hidden ore body at position of drilling ore Technical Field The invention relates to the technical field of geological exploration, in particular to a method for calculating the occurrence of a position of a certain drilling ore-seeing position of a hidden ore body. Background In geological exploration, the occurrence data directly influences the understanding of the mineral form and the circle connection of the mineral bodies (when the hidden mineral bodies are circle connected, whether the thickness of the mineral bodies is larger than the recoverable thickness is calculated according to the occurrence of the positions of the visible mineral in the drilling holes, the boundary line between the mineral and the non-mineral is further determined), and influences the accuracy of resource quantity estimation and further exploration, and the current method for determining the occurrence of the hidden mineral bodies is mainly summarized as follows: 1. The axis angle method is to directly measure the axis angle in the drilling hole and then calculate the inclination angle according to the drilling hole inclination measurement data. The method is mainly suitable for the ore body controlled by the stratum and the ore body controlled by the structure. 2. And calculating the occurrence according to the spatial positions of the three drilling holes and the position of the ore finding. The method is mainly applicable to layered and lamellar ore bodies and ore bodies with controlled structure. 3. On the basis of the three-point surface method, adjacent drilling holes are combined into different triangles in a certain range, the respective occurrence is calculated respectively, and the average occurrence is calculated according to the occurrence. The method is mainly suitable for calculating layered and layered-like mineral layers, such as coal seams and the like, when the exploratory projects are more. 4. The profile method is to draw a profile, project the positions of the drilling hole and the ore to the profile, and measure the positions after the positions are connected by natural curves. The measuring device is suitable for most types of ore bodies, and the measured angle is the apparent dip angle. The method can intuitively measure the dip angle of the ore body at a certain position, but the dip angle is difficult to judge, the section method can measure the visual dip angle of the ore layer, but the dip angle and the true dip angle cannot be directly judged, and the three-point surface method is calculated by taking the ore body as a plane, can calculate the overall occurrence of the ore layer in a certain range, and when the occurrence of the ore layer at two sides of a drilling hole is different, the position of the ore layer in the drilling hole is just an inflection position. The averaging method reduces errors to some extent, but the calculation amount is also large. Accordingly, there is a need to provide a method for calculating the occurrence of a blind ore body at a point where a borehole is visible. Disclosure of Invention Aiming at the defects of the prior art, the invention aims to provide a method for calculating the occurrence of a certain drilling visible mine position of a hidden ore body so as to solve the problems in the prior art. The invention is realized in that a method for calculating the occurrence of a position of a visible mine of a certain borehole of a hidden ore body comprises the following steps: obtaining the space coordinates of the target drilling hole at the ore-seeing position ,,) And spatial coordinates of a plurality of adjacent boreholes at a mine site,,) Subscript n denotes the nth adjacent borehole; calculating the spatial distance between the target borehole mineral position and each adjacent borehole mineral position And azimuth angle; Determining a weight function that varies adaptively with distanceGenerating a group of space coordinates of virtual points corresponding to each adjacent drilling hole according to the weight function, wherein the weight function is used for weighting the plane position and elevation information of the adjacent drilling holes, and the plane position weighting considers azimuth angles; Sequentially connecting and closing the virtual points to form a polygonal curved surface, calculating the horizontal projection area of the polygonal curved surface, and calculating the vertical projection areas of the polygonal curved surface in different directions within the range of 0-180 degrees; calculating the inclination angle of the blind ore body at the position of the target drilling visible ore by using an arctangent function according to the ratio of the maximum vertical projection area to the horizontal projection area; Determining a direction corresponding to the maximum vertical projection area and a direction opposite to the direction, and selecting a direction with a smaller elevation value as a tendency