US-12618995-B2 - Finite element-based ore deposit drilling information processing and analysis method and device

US12618995B2US 12618995 B2US12618995 B2US 12618995B2US-12618995-B2

Abstract

A finite element-based ore deposit drilling information processing and analysis method and device are described herein. The information processing method includes: dividing finite elements based on related information of an exploration borehole, and constructing corresponding sectional finite element planes; and performing three-dimensional (3D) spatial co-position stacking on the sectional finite element planes, and constructing scanning analytic finite element profiles through spatial analysis. According to the method, geological borehole information can be visually analyzed and presented in a sectional and layered mode, and the method has excellent practical value and indicating significance for accurate delineation of prospecting target areas, accurate mining, dressing and smelting, and structural metallogenic research.

Inventors

Linglin ZHONG
Kanghui ZHONG
Qin QIN
Hongjie ZHANG
Zhao Yan
Haozhen HUANG
Yupeng CHANG

Assignees

CHENGDU UNIVERSITY OF TECHNOLOGY

Dates

Publication Date: 20260505
Application Date: 20221215
Priority Date: 20211223

Claims (9)

1 . A finite element-based ore deposit drilling information processing method, the method is performed by an ore deposit drilling information analysis device, comprising a storage medium and an arithmetic unit (ALU), wherein when the ALU executes program and/or structural data stored on the storage medium, the ALU is configured to perform following operations, comprising: obtaining borehole information, sampled sample information, and geological information corresponding to a borehole of a to-be-analyzed ore deposit, wherein the sampled sample information comprises position information and chemical analysis information of samples sampled through the borehole; based on three standard values of an associated grade, a cut-off grade, and an industrial grade specified in an industrial standard of mineral geological exploration specifications, performing grade classification of ore deposits corresponding to the samples at different positions according to the sampled sample information; according to the borehole information, the sampled sample information, and the geological information corresponding to the borehole, performing vertical section analysis of the to-be-analyzed ore deposit, wherein the vertical section analysis comprises: determining a vertical spacing of vertical sections and number of the vertical sections, calculating mineralization, hidden explosion, and alteration parameters of each of the sections, and classifying the calculated parameters; obtaining a horizontal plane projection map of exploration borehole control points in different vertical sections, and performing map zoning according to a control range of each exploration point to form a sectional finite element zoning map; according to results of the vertical section analysis, assigning different parameters to each finite element in the sectional finite element zoning map of different vertical sections to form a sectional finite element plane of each parameter; performing three-dimensional (3D) superposition on the sectional finite element plane of each parameter according to spatial positions, and during the superposition, combining parameters at a same position to obtain a 3D composite data graph; scanning and analyzing the 3D composite data graph on a vertical profile to obtain a corresponding finite element profile containing composite data; performing superposition analysis on the sectional finite element plane and/or the corresponding finite element profile; and determining a spatial correlation of multiple objects according to results of the superposition analysis, and delineating a potential metallogenic prospect zone in combination with a development trend of a mineralization grade, a hidden explosion grade, and an alteration grade, and a geological law to predict and evaluate a resource potential of surrounding and deep ore bodies of a mining area; wherein a process of obtaining the sectional finite element zoning map specifically comprises: in any vertical section, projecting the exploration borehole control points on the plane; performing finite extrapolation of outermost control points and connecting an envelope of an extrapolated circle to determine a boundary of the finite element zoning map; according to a principle of adjacent points sharing a same edge, dividing a boundary line of the finite elements along a midpoint between adjacent projects, and dividing the finite elements accordingly to form the sectional finite element zoning map; according to a regional geological structure, a degree of engineering deflection, and distribution of discontinuities, and in combination with a geological expert knowledge base, adjusting boundary division of the finite elements; and assigning the results of the vertical section analysis to each finite element class by class to form the sectional finite element plane of each parameter, wherein an extrapolated spacing is ½ of an average spacing of mining projects; wherein in the sectional finite element plane, data compositions at different points are as follows: for any point D m , if the point is located in the finite element, there is: D m ={X m ,Y m ,P,α p ,β p ,γ p . . . }; and if the point is located on a boundary of the finite element, there is: D m ={X m ,Y m ,H m ,B} wherein X m and Y m represent plane coordinates of the point, P represents the finite element that the point belongs to on the plane, α p , β p , γ p . . . represents various to-be-analyzed attributes to which the finite element is assigned, B represents a boundary point nature of the point, and H n represents an elevation of a section where the point is located; wherein a process of obtaining the finite element profile containing composite data specifically comprises: on each horizontal plane of the 3D composite data graph, arranging a parallel vertical profile with a horizontal spacing of for zone line spatial discrimination analysis with the sectional finite element zoning map; when the vertical profile intersects a sectional plane of the sectional finite element zoning map, assigning an intersection point according to the combination of the parameters at the same position; based on boundary points assigned in the sectional finite element plane, dividing an intersection line of the vertical profile and the sectional plane, extending each boundary point on the intersection line by ½ upward or downward along the vertical profile, and performing horizontal sealing to create the finite elements on the profile; and based on attribute points on the intersection line assigned with (P, α p , β p , γ p ), assigning the profile finite element, and constructing the analytic finite element profile and a corresponding database for the analytic finite element profile.
2 . The information processing method according to claim 1 , wherein the borehole information comprises position coordinates, an elevation, an azimuth angle, a dip angle and a depth of the borehole; and/or, the sampled sample information comprises starting position coordinates of sampling, ending position coordinates of sampling, and chemical analysis items and chemical analysis result data of the samples; and/or, the geological information comprises a name of rock and ore corresponding to the borehole, geological description, an alteration type, and a hidden explosion and crushing degree.
3 . The information processing method according to claim 1 , wherein the grades comprise: grade A: greater than or equal to associated grade and less than cut-off grade; grade B: greater than or equal to cut-off grade and less than industrial grade; and grade C: greater than or equal to industrial grade.
4 . The information processing method according to claim 1 , wherein the vertical section analysis specifically comprises: setting a vertical spacing H of the section analysis; according to the borehole information, obtaining an elevation H(max) of a maximum opening and an elevation H(min) of a minimum final hole of the borehole, and determining a number of the sections [N]+1 in combination with the vertical spacing, wherein [ ] represents rounding, and N is calculated as follows: N = H ⁡ ( max ) - H ⁡ ( min ) H _ ; and according to the geological information corresponding to the borehole, calculating a mineralization thickness percentage parameter, a thickness percentage parameter of a hidden explosion section, and a thickness percentage parameter of an altered section of the boreholes in each vertical section with different grades, and classifying the percentage parameters into several levels from high to low, wherein the percentage parameters are calculated as follows: mineralization thickness percentage-(mineralization thickness in vertical section/thickness of sample section)×100%; thickness percentage of hidden explosion section-(length of hidden explosion section in vertical section/thickness of sample section)×100%; and thickness percentage of altered section-(length of altered section in vertical section/thickness of sample section)×100%.
5 . The information processing method according to claim 4 , wherein the vertical spacing H is 20-25 m; and/or, the levels comprise the following five levels: 100-80% for level I, 80-60% for level II, 60-40% for level III, 40-10% for level IV, and 10-0% for level V.
6 . An ore deposit drilling information analysis device, comprising a storage medium and an arithmetic unit (ALU), wherein the storage medium stores program and/or structural data for implementing the information processing method according to claim 1 .
7 . The ore deposit drilling information analysis device according to claim 6 , wherein the borehole information comprises position coordinates, an elevation, an azimuth angle, a dip angle and a depth of the borehole; and/or, the sampled sample information comprises starting position coordinates of sampling, ending position coordinates of sampling, and chemical analysis items and chemical analysis result data of the samples; and/or, the geological information comprises a name of rock and ore corresponding to the borehole, geological description, an alteration type, and a hidden explosion and crushing degree.
8 . The ore deposit drilling information analysis device according to claim 6 , wherein the grades comprise: grade A: greater than or equal to associated grade and less than cut-off grade; grade B: greater than or equal to cut-off grade and less than industrial grade; and grade C: greater than or equal to industrial grade.
9 . The ore deposit drilling information analysis device according to claim 6 , wherein the vertical section analysis specifically comprises: setting a vertical spacing H of the section analysis; according to the borehole information, obtaining an elevation H(max) of a maximum opening and an elevation H(min) of a minimum final hole of the borehole, and determining a number of the sections [N]+1 in combination with the vertical spacing H , wherein [ ]represents rounding, and N is calculated as follows: N = H ⁡ ( max ) - H ⁡ ( min ) H _ ; and according to the geological information corresponding to the borehole, calculating a mineralization thickness percentage parameter, a thickness percentage parameter of a hidden explosion section, and a thickness percentage parameter of an altered section of the boreholes in each vertical section with different grades, and classifying the percentage parameters into several levels from high to low, wherein the percentage parameters are calculated as follows: mineralization thickness percentage-(mineralization thickness in vertical section/thickness of sample section)×100%; thickness percentage of hidden explosion section-(length of hidden explosion section in vertical section/thickness of sample section)×100%; and thickness percentage of altered section=(length of altered section in vertical section/thickness of sample section)×100%.

Description

CROSS REFERENCE TO RELATED APPLICATION This patent application claims the benefit and priority of Chinese Patent Application No. 202111586366.8, filed with the China National Intellectual Property Administration on Dec. 23, 2021, the disclosure of which is incorporated by reference herein in its entirety as part of the present application. TECHNICAL FIELD The present disclosure relates to the technical field of ore deposit drilling information analysis methods. BACKGROUND How to interpret and present ore deposit exploration information and guide the exploration, development and comprehensive utilization of ore resources is an important research content of ore deposit science. Compared with the basic geological survey, geochemical exploration, geophysical exploration, remote sensing, and prospecting projects carried out on the surface and shallow underground, the exploration borehole information can directly and objectively reflect geological information such as underground lithology, occurrence, structure, construction, mineralization, alteration, hidden explosion and crushing within the borehole range, providing direct, real and reliable data support for geological exploration. In addition, in recent years, with the development of analysis technology, the element analysis data of drilling core have been enriched. In the prior art, the drilling exploration data is processed and presented mainly through the geological profile and geochemical interpolation map of the exploration line, which usually follows the processing sequence of the single project borehole histogram, exploration line profile, and sectional plane. This method has the following obvious defects: (1) During construction of geological/geochemical profiles of exploration lines, due to the subjectivity of manual linking and the distortion or over fitting of interpolation methods, they often deviate from the geological reality. (2) The boundaries of different types of geological and geochemical maps are quite different, so it is often difficult to carry out spatial comprehensive matching analysis, and only rough superposition analysis can be carried out. (3) Due to the lack of vertical constraint between the two boreholes, the commonly used processing sequence of the profile has congenital errors, and the errors generated in the profile drawing phase will further accumulate during drawing of the plane, resulting in distortion. On the other hand, in recent years, researchers have gradually realized that the geological system, especially the system of magma, structure and fluid interaction, is an open, complex and fuzzy nonlinear system with self-organized criticality. In addition, endogenetic deposits, especially fluid related deposits, often form complex superposition of multiple systems from different geological historical periods. It is difficult to interpret it as a whole under the existing technical conditions. Both empirical inference and interpolation based on existing data are likely to be misleading. SUMMARY An objective of the present disclosure is to provide an improved ore deposit drilling information processing method and device, which can use computer technology to visually analyze and present sectional and layered geological borehole information. The processing method can solve the problem that it is difficult to perform comprehensive comparative analysis of multivariate geological information and geochemistry for the map results in the existing methods, and can further solve the problems of systematic errors caused by the lack of vertical constraints between boreholes, human factors having great influence on the delineation of geological body boundaries of exploration profiles, as well as the obvious interpolation distortion in the drawing of geochemical maps in the traditional method for obtaining the sectional plane through the exploration line profile. Technical solutions of the present disclosure are as follows: A finite element-based ore deposit drilling information processing method includes: obtaining borehole information, sampled sample information, and geological information corresponding to a borehole of a to-be-analyzed ore deposit, where the sampled sample information includes position information and chemical analysis information of samples sampled through the borehole; based on three standard values of an associated grade, a cut-off grade, and an industrial grade specified in an industrial standard of mineral geological exploration specifications, performing grade classification of ore deposits corresponding to the samples at different positions according to the sampled sample information;according to the borehole information, the sampled sample information, and the geological information corresponding to the borehole, performing vertical section analysis of the to-be-analyzed ore deposit, where the analysis includes: determining a spacing and number of vertical sections, calculating mineralization, hidden explosion,