CN111122383A - Open stope fine acceptance method based on ore type and grade division - Google Patents
Open stope fine acceptance method based on ore type and grade division Download PDFInfo
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Abstract
The invention aims to solve the problems in the existing open stope acceptance technology, provides an open stope fine acceptance method based on ore type and grade division, and belongs to the technical field of mine geology. The method includes the steps of accurately dividing an ore area of an open stope according to blast hole data of the open stope, dividing the ore area into ore areas of different types and different grades, and performing volume calculation and proportion test on the ore areas of different types and different grades respectively to determine the ore amount of the ore areas of different types and different grades. The invention can not only obtain the total ore amount of the ore blocks of the open stope, but also more importantly divide the ore amount more finely, so that the acceptance information is more meticulous, accurate and comprehensive than before, thereby providing a new technology and a method for accurately and comprehensively understanding the mining condition of the stope and improving the acceptance quality of the stope.
Description
Technical Field
The invention belongs to the technical field of mine geology, and particularly relates to an open stope fine acceptance method based on ore type and grade division.
Background
The stope acceptance measurement of the strip mine is the most frequent and most important work of the strip mine, the work is carried out on schedule every month, the work is closely related to the economic benefit of an enterprise, the basis is provided for the execution condition of the production plan of the strip mine inspection, and indispensable reliable data is provided for the arrangement and adjustment of the future production plan. Therefore, the method can quickly and accurately carry out the field acceptance measurement and the field data processing and draw the current situation chart of the stope, and becomes the primary task of the field acceptance of the open pit mine.
Traditional opencast stope acceptance is subject to improvement and advancement in the following areas:
(1) the method has the characteristics of subjectivity and experience, and sometimes has large errors, so that the boundary delineation of the ore body is not accurate enough, and the accurate calculation of the mineral acceptance amount is influenced.
(2) At present, the acceptance of stopes only considers the calculation of rock and ore quantity, namely, rock and ore in an ore area are divided into two categories of rock and ore, the volumes of the rock and the ore are respectively calculated and then multiplied by respective densities (specific gravity), so that the rock quantity and the ore quantity in the ore area are determined, the qualities of different grades (such as grade height and grade distribution) of the ore are not fully considered, the acceptance information is not comprehensive and accurate enough, and the comprehensive understanding of the mining condition of each stope is influenced.
Therefore, there is a need for further improvements in the acceptance methods of stopes.
Disclosure of Invention
The invention aims to provide an open stope fine acceptance method based on ore type and grade division, aiming at solving the problems in the existing open stope acceptance technology. The method includes the steps of accurately dividing an ore area of an open stope according to blast hole data of the open stope, dividing the ore area into ore areas of different types and different grades, and performing volume calculation and specific gravity (density) test on the ore areas of different types and different grades respectively to determine the ore amount of the ore areas of different types and different grades. The invention can not only obtain the total ore amount of the ore blocks of the open stope, but also more importantly divide the ore amount more finely, so that the acceptance information is more meticulous, accurate and comprehensive than before, thereby providing a new technology and a method for accurately and comprehensively understanding the mining condition of the stope and improving the acceptance quality of the stope.
The technical scheme of the invention is that an open stope fine acceptance method based on ore type and grade division comprises the following steps:
1) analyzing the components of the ore samples extracted from each blast hole of the open stope, and determining the ore type and grade of the ore sample corresponding to each blast hole;
2) finely dividing the ore area according to the ore types and the grades of the ore samples at each blast hole;
a. dividing the mining area into a hematite mining area and a magnetite mining area according to the ore type of the sample;
b. according to the grade range of the sample, dividing the hematite area and the magnetite area into a plurality of ore areas with different grades by utilizing grade isolines;
wherein, the grade contour is set as an integer value; if the grade test value of the blast hole is equal to the numerical value of a certain grade contour, the point is the position of the grade contour; if the grade test value of the blast hole is not equal to the value of any grade contour line, calculating the grade test values of two adjacent blast holes by adopting a distance weighted inverse ratio interpolation method, and determining the position of the grade contour line; drawing a corresponding grade contour line by using the grade test value of each blast hole, and finally obtaining all blast grade contour lines so as to determine ore areas with different grades;
3) determining the areas of ore areas with different grades in the hematite area and the magnetite area, then determining the heights of mining surfaces of the ore areas with corresponding grades, and further determining the volumes of the ore areas with different grades in the hematite area and the magnetite area;
4) according to the volumes of ore areas with different grades in the hematite area and the magnetite area and the densities (specific gravity) of ores with corresponding grades, the ore quantities of the ore areas with different grades in the hematite area and the magnetite area and the iron contents of the ore areas with different grades are further determined;
5) and determining the total ore quantity and the total iron content of the total ore area according to the ore quantities of the ore areas with different grades in the hematite area and the magnetite area and the iron contents of the ore areas with different grades.
Compared with the prior art, the invention has the advantages that:
1. according to the method, the distribution areas of magnetite and hematite and the distribution areas of different-grade ores in the mining area can be determined by finely dividing the open stope, so that the acceptance information of the stope is more detailed and comprehensive than the prior art, the mine is guided to determine the beneficiation method and the ore blending process, and the production efficiency and the benefit of the mine are improved.
2. According to the method, the total ore quantity and the iron content of the ore areas are determined by determining the ore quantities of the ore areas with different grades and the iron content of the ore areas with different grades, so that the acceptance quality is ensured, and a basis is provided for the execution condition of the production plan of strip mine inspection.
Drawings
Fig. 1, a precise division of the top surface of an open stope in example 1;
fig. 2, a precise sectional view of the surface stope mining ore body in the embodiment 1.
Detailed Description
Example 1
1. Ingredient determination
Analyzing the components of the ore samples extracted from each blast hole of the open stope, and determining the ore type and grade of the ore sample corresponding to each blast hole;
2. accurate zoning
Finely dividing the ore area according to the ore types and the grades of the ore samples at each blast hole; as shown in fig. 1, blast holes of an open stope are distributed in a grid shape, and a mining area is divided into a hematite mining area and a magnetite mining area according to the ore type of a sample;
then according to the grade range of the sample, dividing the hematite area and the magnetite area into a plurality of ore areas with different grades by utilizing grade isolines;
wherein, the grade contour is set as an integer value; if the grade test value of the blast hole is equal to the numerical value of a certain grade contour, the point is the position of the grade contour; if the grade test value of the blast hole is not equal to the value of any grade contour line, calculating the grade test values of two adjacent blast holes by adopting a distance weighted inverse ratio interpolation method, and determining the position of the grade contour line; drawing a corresponding grade contour line by using the grade test value of each blast hole, and finally obtaining all blast grade contour lines so as to determine ore areas with different grades; the ore area is divided into ore areas with different grades by determining isolines, the hematite area is divided into 3 areas (such as areas 1-3 in figure 2), the magnetite area is divided into 1 area (such as area 4 in figure 2), wherein the grade of the ore in the area 1 is g1, g1 is the average value of the grade isolines at two ends of the area, the grade of the ore in the area 2 is g2, g2 is the average value of the grade isolines at two ends of the area, the grade of the ore in the area 3 is g3, g3 is the average value of the grade isolines at two ends of the area, the grade of the ore in the area 4 is g4, and g4 is the average value of the grade isolines at two ends of the area.
3. Volume determination
Determining the areas of the ore areas with different grades, then determining the height of a mining surface, and further determining the volumes of the ore areas with different grades;
as shown in fig. 2, the areas of the ore zones of different grades are determined, wherein the area of zone 1 is S1, the area of zone 2 is S2, the area of zone 3 is S3, and the area of zone 4 is S4. After the height h of the extraction surface is determined, the volume of the individual regions is determined from V ═ sxh, the volume of region 1 being the volumeV1, region 2 volume V2, region 3 volume V3, and region 4 volume V4. Total volume V of hematite ore bodyRed blood in the stomachV1+ V2+ V3, total volume V of magnetite ore bodyMagnetic field＝V4。
4. Ore quantity determination
The density (specific gravity) of the ores of different grades is determined, and the ore amount of the ore areas of different grades and the iron content of the ore areas of different grades can be determined according to the volume of the ore areas of different grades and the density (specific gravity) of the ores of different grades.
Determining the density (specific gravity) rho of ore in different regions, wherein the ore density (specific gravity) of a region 1 is rho 1, rho 1 is the average value of the ore density sampled by each blast hole in the region, the ore density (specific gravity) of a region 2 is rho 2, rho 2 is the average value of the ore density sampled by each blast hole in the region, the ore density (specific gravity) of a region 3 is rho 3, rho 3 is the average value of the ore density sampled by each blast hole in the region, the ore density (specific gravity) of a region 4 is rho 4, and rho 4 is the average value of the ore density sampled by each blast hole in the region, and then determining the ore amount of each region according to Q ═ V × rho, wherein the ore amount of the region 1 is Q1, the ore amount of the region 2 is Q2, the ore amount of the region 3 is Q3, and the ore amount of the region 4 is Q4; the iron content in the different zones can also be determined.
5. According to the ore amount of the ore areas with different grades and the iron content of the ore areas with different grades, the total ore amount and the iron content of the ore areas can be determined.
The total ore quantity of the hematite ore body Q red-Q1 + Q2+ Q3, the total ore quantity of the magnetite ore body Q magnet-Q4, and the total ore quantity of the magnetite ore body Q magnet-Q red-Q magnet-Q1 + Q2+ Q3+ Q4 can be determined, so that the total ore quantity of the ore body mined in an open stope can be determined, and the total iron content in the mined ore body can also be determined.
The method leads the acceptance information of the stope to be more detailed and comprehensive than the prior art, guides the mine to determine the mineral separation method and the mineral preparation flow, improves the production efficiency and the benefit of the mine, lays a foundation for arranging and adjusting the future production plan, and provides indispensable reliable data.
Claims (2)
1. An open stope fine acceptance method based on ore type and grade division is characterized by comprising the following steps:
1) analyzing the components of the ore samples extracted from each blast hole of the open stope, and determining the ore type and grade of the ore sample corresponding to each blast hole;
2) finely dividing the ore area according to the ore types and the grades of the ore samples at each blast hole;
a. dividing the mining area into a hematite mining area and a magnetite mining area according to the ore type of the sample;
b. according to the grade range of the sample, dividing the hematite area and the magnetite area into a plurality of ore areas with different grades by utilizing grade isolines;
3) determining the areas of ore areas with different grades in the hematite area and the magnetite area, then determining the heights of mining surfaces of the ore areas with corresponding grades, and further determining the volumes of the ore areas with different grades in the hematite area and the magnetite area;
4) according to the volumes of ore areas with different grades in the hematite area and the magnetite area and the densities of ores with corresponding grades, the ore quantities of the ore areas with different grades in the hematite area and the magnetite area and the iron contents of the ore areas with different grades are further determined;
5) and determining the total ore quantity and the total iron content of the total ore area according to the ore quantities of the ore areas with different grades in the hematite area and the magnetite area and the iron contents of the ore areas with different grades.
2. The method for fine acceptance of an open stope based on ore type and grade division according to claim 1, wherein in step 2) b, the method for dividing into several ore sections of different grades by grade contour is as follows: setting the grade contour as an integer value; if the grade test value of the blast hole is equal to the numerical value of a certain grade contour, the point is the position of the grade contour; if the grade test value of the blast hole is not equal to the value of any grade contour line, calculating the grade test values of two adjacent blast holes by adopting a distance weighted inverse ratio interpolation method, and determining the position of the grade contour line; and drawing a corresponding grade contour line by using the grade test value of each blast hole, and finally obtaining all the blast grade contour lines, thereby determining ore areas with different grades.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113705916A (en) * | 2021-09-01 | 2021-11-26 | 东北大学 | Multi-source and multi-target ore blending method for iron ore of strip mine |
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