The main types of ore body boundary lines are:
First, the zero boundary line is the line connecting the thickness of the edge of the ore body or the point where the grade can be zero, that is, the line connecting the point of the ore body.
2. The boundary line of the recoverable boundary line, which is determined by the minimum recoverable thickness or the lowest recoverable grade or the lowest percentage of the meter. The ore body within this boundary is an industrial ore body.
Third, the ore type, grade boundary line, such as within the recoverable boundary, according to the type or grade defined by the ore type or grade.
4. The boundary of the reserve level, which is bounded by different reserves levels.
5. The inner boundary line, bounded by the direct connection of the ore body to the mine project;
6. The outer boundary line, the ore body boundary line delimited by a certain distance is extrapolated from the edge of the ore body. The outer boundary line is divided into the following two types: (1) finite extrapolation: the boundary line of the ore body connected to the edge ore project and the unexplored project; (2) the infinite extrapolation method: the edge sees the mine project, no more Engineering control, along the edge of the mine project to extrapolate the ore body boundary line bounded by a certain distance.
The methods for delineating ore bodies are:
1. Direct method When the zero point of the ore body or the base point of the exploitable boundary line has been exposed by the exploration and mining project, the boundary line of the ore body can be determined by the direct method.
2. The finite inference method is a method of determining the ore body boundary line between two projects in the edge section of the ore body along the strike or along the trend. When both projects see mines, one meets the requirements of industrial indicators, one does not meet the requirements of the index, and the boundary point of the boundary between the two projects can be obtained by interpolation or calculation. If a project sees mine and a project does not see mine, then the ore body In the case, according to practical experience, 1/4 or 1/2 or 2/3 of the distance between the two projects is extrapolated from the mine project.
3. The infinite inference method is close to the edge of the ore body. All the exploration and mining projects expose the ore body, but there is no engineering control outside the project. At this time, the deduction method for inferring a certain distance from the outer part of the ore body is called the infinite inference method. . The extrapolation distance should be inferred based on the ore-forming conditions of the deposit, the ore-controlling structure and the shape of the ore body.
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