CN112950099A - Comprehensive evaluation method for germanium, gallium, lithium and rare earth resources in coal - Google Patents
Comprehensive evaluation method for germanium, gallium, lithium and rare earth resources in coal Download PDFInfo
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- 239000003245 coal Substances 0.000 title claims abstract description 459
- 238000011156 evaluation Methods 0.000 title claims abstract description 146
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 title claims abstract description 94
- 229910052733 gallium Inorganic materials 0.000 title claims abstract description 94
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 93
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 93
- 229910052732 germanium Inorganic materials 0.000 title claims abstract description 92
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 title claims abstract description 92
- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 92
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 74
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 64
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- 235000010755 mineral Nutrition 0.000 claims abstract description 64
- 238000005070 sampling Methods 0.000 claims abstract description 51
- 230000002159 abnormal effect Effects 0.000 claims abstract description 44
- 229910052751 metal Inorganic materials 0.000 claims abstract description 26
- 239000002184 metal Substances 0.000 claims abstract description 25
- 238000005065 mining Methods 0.000 claims abstract description 20
- 238000012360 testing method Methods 0.000 claims abstract description 11
- 238000001514 detection method Methods 0.000 claims abstract description 4
- 235000013619 trace mineral Nutrition 0.000 claims abstract description 4
- 239000011573 trace mineral Substances 0.000 claims abstract description 4
- 238000009933 burial Methods 0.000 claims description 30
- 238000011161 development Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 10
- 150000002739 metals Chemical class 0.000 claims description 5
- 239000003415 peat Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 238000013480 data collection Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000001095 inductively coupled plasma mass spectrometry Methods 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
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- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The invention relates to a comprehensive evaluation method of germanium, gallium, lithium and rare earth resources in coal, which comprises the evaluation of geological conditions and grade conditions of the resources in coal, and the exploitation and utilization values of the resources are determined according to the evaluation. The comprehensive evaluation method comprises an abnormal area delineating stage and a resource evaluation stage, wherein the abnormal area delineating stage comprises the following steps: according to the pre-acquired basic geological data of the coal mining area, delineating a coal series mineral enrichment area; collecting a sample from the enrichment area, and detecting trace elements of the sample; determining the range of an evaluation area according to the detection result data and the predetermined evaluation standard of each resource; and determining the range of the abnormal area according to the predetermined metal enrichment standard of the sampling point in the evaluation area. The resource evaluation phase comprises the following steps: collecting a sample from the abnormal area, and testing the sample; and comparing the test result data with the evaluation standards of the predetermined working degree, geological conditions and mineral conditions, and evaluating the resources of germanium, gallium, lithium and rare earth in the coal mine.
Description
Technical Field
The invention belongs to the technical field of strategic mineral resource evaluation and utilization in coal, and particularly relates to a comprehensive evaluation method for germanium, gallium, lithium and rare earth resources in coal.
Background
With the rapid development of the world economy, the demand of people for high and new technologies and sophisticated products is increasingly tense. The use of critical metals such as germanium, gallium, lithium, rare earths, etc. plays a crucial role for the innovation of products and technology. Coal is used as organic rock and mineral products with reducibility and adsorption performance, strategic key metal elements such as gallium, lithium, germanium, rare earth and the like can be enriched under specific geological conditions, and the coal can be enriched into mineral ores, and is an important novel ore deposit type. The distribution characteristics, occurrence rules, causes, material sources and the like of germanium, gallium, lithium and rare earth in coal are studied to different degrees by predecessors, but the knowledge of the distribution characteristics, occurrence rules, causes, material sources and the like as resource research is insufficient.
In recent years, the exploration of three rare metal mineral resources such as germanium, gallium, lithium, rare earth and the like in coal seams is greatly progressed, the connotation of the term of coal resources is filled, the extension of the term of coal resources is expanded, and the prospect of comprehensive development and utilization of coal-based mineral resources is shown. However, due to the restrictions of historical conditions and the current exploration and evaluation methods, the exploration projects of coal and its associated mineral resources cannot be comprehensively explored and evaluated, so that the national strategic type key mineral resources in the coal are wasted greatly. Therefore, a comprehensive assessment method of key mineral resources in coal is urgently needed to guide comprehensive exploration work of coal-bearing rock series mineral resources.
Disclosure of Invention
Aiming at the problems, the invention provides a comprehensive evaluation method of germanium, gallium, lithium and rare earth resources in coal, which provides geological data for further development of strategic metal resources in coal and provides geological basis for reasonably protecting resources such as symbiotic and associated germanium, gallium, lithium, rare earth and the like in development of coal resources. Meanwhile, the guarantee capability of strategic mineral products in China is enhanced, the reasonable development and utilization degree of metal mineral resources in coal is improved, and the conversion of coal from single fuel to fuel and industrial raw materials is promoted.
The comprehensive evaluation method comprises an abnormal area delineating stage and a resource evaluation stage,
the abnormal region delineation stage comprises: according to the pre-acquired basic geological data of the coal mining area, delineating a coal series mineral enrichment area;
collecting a sample from the enrichment area, and detecting trace elements of the sample;
determining the range of an evaluation area according to the detection result data and the predetermined evaluation standard of germanium, gallium, lithium and rare earth;
determining the range of the abnormal area according to the predetermined metal enrichment standard of the sampling point in the evaluation area;
the resource evaluation phase comprises the following steps: collecting a sample from the abnormal area, and testing the sample;
and comparing the test result data with the evaluation standards of the predetermined working degree, geological conditions and mineral conditions, and evaluating the resources of germanium, gallium, lithium and rare earth in the coal mine.
Optionally, the basic geological data of the coal mining area may be obtained through data collection and arrangement. The method can collect and analyze the exploration and research results of the coal mine resources in the region and the adjacent region while developing the investigation and evaluation of the coal mine resource, and obtain the distribution characteristic data of the coal mine resources, so that the occurrence conditions of coal beds, coal systems and the coal mine resources can be roughly known, and then the enrichment region can be preliminarily defined according to the distribution characteristic data of the coal mine resources. For example, the coal mine geological survey report is made according to DZ/T0215-2002 coal and peat geological survey specifications and the like.
Optionally, the evaluation criteria of germanium, gallium, lithium and rare earth are as follows: the method comprises the steps that germanium, gallium, lithium and rare earth elements in coal respectively reach respective predetermined boundary grade contents, wherein the boundary grade contents of the germanium, the gallium, the lithium and the rare earth are respectively 20 mug/g, 30 mug/g, 80 mug/g and 200 mug/g.
Optionally, the metal enrichment standard of the sampling point in the evaluation area is as follows: the density of the sampling points is not less than 3 points/km2The key metal enrichment coefficient CC in coal>And 5, the grade content of at least 30% of sampling points meets the boundary grade content requirement of corresponding metals.
The enrichment coefficient CC is the ratio of the average value of the metal element content in the coal samples of all sampling points to the average value of the metal element content of the world coal, and the average values of the world coal of germanium, gallium, lithium and rare earth elements are respectively 2.6 [ mu ] g/g, 6 [ mu ] g/g, 14 [ mu ] g/g and 64.2 [ mu ] g/g.
Optionally, the comparing the test result data with the predetermined evaluation criteria of the working degree, the geological condition and the mineral condition to evaluate the resources of germanium, gallium, lithium and rare earth in the coal mine includes:
determining an evaluation standard of the working degree according to the predetermined classification of the density of the sampling points;
determining an evaluation standard of geological conditions according to a predetermined standard of coal resource quantity, a predetermined standard of coal seam thickness, a predetermined standard of coal seam stability and a predetermined standard of coal seam burial depth;
and determining the evaluation standard of mineral conditions according to the predetermined standard of the raw coal grade content and the standard of the raw coal grade change coefficient.
Optionally, the grading of the density of the sampling points comprises<3 points/km23-6 points/km2And is not less than 6 points/km2。
Optionally, the standard of the coal resource amount is as follows: dividing different types of coal mines into a well field, a mining area and a coal field; for different types of coal mines, the coal mines are divided into large, medium and small coal mines according to the quantity of coal resources;
optionally, the standard of the coal seam thickness is as follows: according to the thickness of the coal bed, the coal bed is divided into a thin coal bed, a thick coal bed, a medium coal bed and a thick coal bed, wherein the thickness of the thin coal bed is less than 1.3m, the thickness of the thick coal bed and the medium coal bed is 1.3-8.0m, and the thickness of the thick coal bed is more than or equal to 8.0 m.
Optionally, the standard of coal seam stability is: according to the second item of coal seam stability evaluation in item 7 of mine geological regulations, the coal seam is divided into an unstable coal seam, a more stable coal seam and a stable coal seam.
Optionally, the standard of the coal seam burial depth is as follows: referring to a scheme for dividing the coal bed burial depth grade in national coal resource potential evaluation, dividing the coal bed burial depth into three grades: the shallow coal layer is less than or equal to 600m, the medium coal layer is 600-1000m and the deep coal layer is more than 1000 m.
Optionally, the raw coal grade content standard is as follows: the raw coal grade contents of germanium, gallium, lithium and rare earth in the coal are graded according to respective boundary grade, lowest industrial grade and rich ore grade.
Optionally, the standard of the raw coal grade variation coefficient is as follows:
optionally, the raw coal grade content standard is as follows: grading the raw coal grade contents of germanium, gallium, lithium and rare earth in the coal according to respective boundary grade, lowest industrial grade and rich ore grade;
optionally, the standard of the raw coal grade variation coefficient is as follows:
the grade change coefficient of the germanium raw coal is divided into three stages: more than 180 percent, 180-80 percent and less than or equal to 80 percent;
the grade change coefficient of the gallium raw coal is divided into three stages: more than 80 percent, 80-30 percent and less than or equal to 30 percent;
the grade change coefficient of the lithium raw coal is divided into three stages: more than 180 percent, 180-80 percent and less than or equal to 80 percent;
the grade change coefficient of the rare earth raw coal is divided into three stages: more than 120 percent, 120-60 percent and less than or equal to 60 percent.
In the resource evaluation stage, a resource evaluation index system of germanium, gallium, lithium and rare earth in coal is established, wherein the resource evaluation index system comprises a condition level and an index level, and the condition level is a main factor for determining the comprehensive development availability of the germanium, gallium, lithium and rare earth in the coal and comprises working degree, geological conditions and mineral conditions; the index level is the basis of comprehensive evaluation of the influence degree and comprises seven indexes.
The working degree comprises indexes of sampling point density, the geological conditions comprise four indexes of coal resource quantity, coal seam thickness, coal seam stability and coal seam burial depth, and the mineral conditions comprise two indexes of germanium/gallium/lithium/rare earth content and grade change coefficient in coal.
In the resource evaluation stage, corresponding index preset values and weight values are respectively set for the seven indexes; actual data of seven indexes in the abnormal area are respectively compared with corresponding index preset values, corresponding numerical values are obtained according to comparison results, and the obtained numerical values are multiplied by weight values of the corresponding indexes to obtain evaluation values of the corresponding indexes;
adding the evaluation values of all indexes belonging to the same condition to obtain the evaluation value of the condition;
and the three conditions of the condition level are respectively provided with corresponding preset ranges, the abnormal areas are graded according to the fact that the evaluation values of different conditions respectively fall into the corresponding preset ranges, and corresponding development strategies are adopted according to the grades.
Optionally, the specific method for comparing the actual data of the seven indexes in the abnormal area with the corresponding index preset values respectively and taking the corresponding numerical values according to the comparison result includes: after the actual values of the seven indexes are compared with the preset values, when the values are taken, the preset values are used as horizontal coordinates and the boundary values of the value ranges are used as vertical coordinates in the determined value ranges, when the data are less than two groups, the data are complemented by 0, a fitting straight line is drawn, then the actual values are used as the horizontal coordinates and are substituted into the equation of the obtained fitting straight line, and the corresponding values are obtained through calculation; and when the value is [0.8,1.0), the value obtained by calculation is more than 1, and the value is 1.
Optionally, the working degree is provided with two preset ranges, namely (0,0.6) and [0.6, 1.0); the evaluation value of the working degree falls in the range of (0,0.6), which indicates that the working degree is poor, the sampling points are few, the obtained data representativeness of other six indexes is insufficient, and the sampling points are increased; the evaluation value of the degree of operation falls within the range of [0.6,1.0), indicating that the degree of operation is acceptable.
Optionally, the geological condition has three preset ranges, namely (0,0.6), (0.6, 0.8) and (0.8, 1.0); the evaluation value of the geological condition falls into the range of (0,0.6), which indicates that the geological condition of the coal mine is poor and the mining difficulty is high; the evaluation value of the geological condition falls in the range of [0.6,0.8), which indicates that the geological condition of the coal mine is moderate and the mining difficulty is moderate; the evaluation value of the geological conditions falls within the range of [0.8,1.0 ], which indicates that the geological conditions of the coal mine are better, the mining difficulty is lower, and the resource development of germanium/gallium/lithium/rare earth elements is facilitated.
Optionally, the mineral conditions are set to four preset ranges, namely (0,0.4), [0.4,0.6), [0.6,0.8) and [0.8, 1.0); the evaluation value of mineral conditions falls within the range of (0,0.4), indicating that the resource potential of germanium/gallium/lithium/rare earth elements is not large; the evaluation value of mineral conditions falls within the range of [0.4,0.6), which indicates that germanium/gallium/lithium/rare earth elements are a mineral resource associated with coal in the region and is recommended to be developed in cooperation with the coal; the evaluation value of mineral conditions falls in the range of [0.6,0.8), which shows that the content and value of germanium/gallium/lithium/rare earth elements in the coal-fired product are focused; the evaluation value of mineral conditions falls within the range of [0.8,1.0), and it is recommended to arrange a survey work for germanium/gallium/lithium/rare earth element mineral resources in coal.
Optionally, for the raw coal grade content index, if the actual gallium/lithium/germanium/rare earth raw coal grade content is respectively less than the ninth preset value of 30 μ g/g, the 11 th preset value of 80 μ g/g, the 13 th preset value of 20 μ g/g and the 15 th preset value of 200 μ g/g, that is, respectively less than the respective boundary grade content, the value ranges of the raw coal grade content index and the raw coal grade content index are (0,0.6), at this time, it is directly determined that the resource potential of gallium/lithium/germanium/rare earth elements in the coal is not large, and the evaluation values of the working degree and the geological conditions do not need to be paid attention.
The comprehensive evaluation method provided by the invention designs the condition level and the subordinate index level thereof, builds an evaluation index system which is suitable for coal mine exploration and is beneficial to representing germanium, gallium, lithium and rare earth resources in coal, and realizes the comprehensive evaluation of the germanium, gallium, lithium and rare earth resources in coal. The working degree is the basis of the evaluation of the mineral deposits of germanium, gallium, lithium and rare earth in the coal, and the credibility of the evaluation result is increased along with the improvement of the working degree; the sampling point density can simply and visually reflect the working degree. The geological conditions are important conditions for measuring the development scale and the economic value of the coal mine, wherein the coal resource amount, the coal seam thickness and the coal seam stability are the primary factors for determining the comprehensive development and utilization scale of germanium, gallium, lithium and rare earth in the coal, and the coal seam burial depth is an important basis for determining the economic value of the mineral resources of germanium, gallium, lithium and rare earth in the coal and the mine construction. The mineral product condition is a main parameter for calculating the amount of the metal resources in the coal of the evaluation unit, and determines the economic value and the development benefit of the metal mineral products in the coal.
Detailed Description
The embodiment provides a comprehensive evaluation method for germanium, gallium, lithium and rare earth resources in coal, the comprehensive evaluation method for geological evaluation comprises an abnormal area delineating stage and a resource evaluation stage,
the abnormal region delineation stage comprises: according to the pre-acquired basic geological data of the coal mining area, delineating a coal series mineral enrichment area;
collecting a sample from the enrichment area, and detecting trace elements of the sample;
determining the range of an evaluation area according to the detection result data and the predetermined evaluation standard of germanium, gallium, lithium and rare earth;
determining the range of the abnormal area according to the predetermined metal enrichment standard of the sampling point in the evaluation area;
the resource evaluation phase comprises the following steps: collecting a sample from the abnormal area, and testing the sample;
and comparing the test result data with the evaluation standards of the predetermined working degree, geological conditions and mineral conditions, and evaluating the resources of germanium, gallium, lithium and rare earth in the coal mine.
Optionally, the basic geological data of the coal mining area may be obtained through data collection and arrangement. The method can collect and analyze the exploration and research results of the coal mine resources in the region and the adjacent region while developing the investigation and evaluation of the coal mine resource, and obtain the distribution characteristic data of the coal mine resources, so that the occurrence conditions of coal beds, coal systems and the coal mine resources can be roughly known, and then the enrichment region can be preliminarily defined according to the distribution characteristic data of the coal mine resources. For example, the coal mine geological survey report is made according to DZ/T0215-2002 coal and peat geological survey specifications and the like.
Optionally, the evaluation criteria of germanium, gallium, lithium and rare earth are as follows: the method comprises the steps that germanium, gallium, lithium and rare earth elements in coal respectively reach respective predetermined boundary grade contents, wherein the boundary grade contents of the germanium, the gallium, the lithium and the rare earth are respectively 20 mug/g, 30 mug/g, 80 mug/g and 200 mug/g.
Optionally, the metal enrichment standard of the sampling point in the evaluation area is as follows: density of sampling pointsDegree not less than 3 points/km2The key metal enrichment coefficient CC in coal>And 5, the grade content of at least 30% of sampling points meets the boundary grade content requirement of corresponding metals.
The enrichment coefficient CC is the ratio of the average value of the metal element content in the coal samples of all sampling points to the average value of the metal element content of the world coal, and the average values of the world coal of germanium, gallium, lithium and rare earth elements are respectively 2.6 [ mu ] g/g, 6 [ mu ] g/g, 14 [ mu ] g/g and 64.2 [ mu ] g/g.
In the resource evaluation stage of the comprehensive evaluation method, on the basis of determining the range of the abnormal area, the distribution, scale, grade and the like of the target common and associated metal resources can be roughly found out through the encrypted arrangement of sampling points and a small amount of necessary drilling and sampling work aiming at the metals in the coal, and resource evaluation grading and resource amount estimation are carried out according to the index data.
Optionally, the comparing the test result data with the predetermined evaluation criteria of the working degree, the geological condition and the mineral condition to evaluate the resources of germanium, gallium, lithium and rare earth in the coal mine includes:
determining an evaluation standard of the working degree according to the predetermined classification of the density of the sampling points;
determining an evaluation standard of geological conditions according to a predetermined standard of coal resource quantity, a predetermined standard of coal seam thickness, a predetermined standard of coal seam stability and a predetermined standard of coal seam burial depth;
and determining the evaluation standard of mineral conditions according to the predetermined standards of the raw coal grade content and the raw coal grade change coefficient.
Optionally, the grading of the density of the sampling points comprises<3 points/km23-6 points/km2And is not less than 6 points/km2。
Optionally, the standard of the coal resource amount is as follows: dividing different types of coal mines into a well field, a mining area and a coal field; for different types of coal mines, the coal mines are divided into large, medium and small coal mines according to the quantity of coal resources;
optionally, the standard of the coal seam thickness is as follows: according to the thickness of the coal bed, the coal bed is divided into a thin coal bed, a thick coal bed, a medium coal bed and a thick coal bed, wherein the thickness of the thin coal bed is less than 1.3m, the thickness of the thick coal bed and the medium coal bed is 1.3-8.0m, and the thickness of the thick coal bed is more than or equal to 8.0 m.
Optionally, the standard of coal seam stability is: according to the second item of coal seam stability evaluation in item 7 of mine geological regulations, the coal seam is divided into an unstable coal seam, a more stable coal seam and a stable coal seam.
Optionally, the standard of the coal seam burial depth is as follows: referring to a scheme for dividing the coal bed burial depth grade in national coal resource potential evaluation, dividing the coal bed burial depth into three grades: the shallow coal layer is less than or equal to 600m, the medium coal layer is 600-1000m and the deep coal layer is more than 1000 m.
Optionally, the raw coal grade content standard is as follows: grading the raw coal grade contents of germanium, gallium, lithium and rare earth in the coal according to respective boundary grade, lowest industrial grade and rich ore grade;
optionally, the standard of the raw coal grade variation coefficient is as follows:
the grade change coefficient of the germanium raw coal is divided into three stages: more than 180 percent, 180-80 percent and less than or equal to 80 percent;
the grade change coefficient of the gallium raw coal is divided into three stages: more than 80 percent, 80-30 percent and less than or equal to 30 percent;
the grade change coefficient of the lithium raw coal is divided into three stages: more than 180 percent, 180-80 percent and less than or equal to 80 percent;
the grade change coefficient of the rare earth raw coal is divided into three stages: more than 120 percent, 120-60 percent and less than or equal to 60 percent.
In the resource evaluation stage, a resource evaluation index system of germanium, gallium, lithium and rare earth in coal is established, wherein the resource evaluation index system comprises a condition level and an index level, and the condition level is a main factor for determining the comprehensive development availability of the germanium, gallium, lithium and rare earth in the coal and comprises working degree, geological conditions and mineral conditions; the index level is the basis of comprehensive evaluation of the influence degree and comprises seven indexes.
The working degree comprises indexes of sampling point density, the geological conditions comprise four indexes of coal resource quantity, coal seam thickness, coal seam stability and coal seam burial depth, and the mineral conditions comprise two indexes of gallium/lithium/rare earth content in coal and grade change coefficient thereof.
In the resource evaluation stage, corresponding index preset values and weight values are respectively set for the seven indexes; actual data of seven indexes in the abnormal area are respectively compared with corresponding index preset values, corresponding numerical values are obtained according to comparison results, and the obtained numerical values are multiplied by weight values of the corresponding indexes to obtain evaluation values of the corresponding indexes;
adding the evaluation values of all indexes belonging to the same condition to obtain the evaluation value of the condition;
and the three conditions of the condition level are respectively provided with corresponding preset ranges, the abnormal areas are graded according to the fact that the evaluation values of different conditions respectively fall into the corresponding preset ranges, and corresponding development strategies are adopted according to the grades.
Optionally, as shown in table 1, the density of the sampling points is provided with a first preset value and a second preset value, and when the density of the actual sampling points in the abnormal area is smaller than the first preset value, the value range corresponding to the density index of the sampling points is (0, 0.6); when the density of the actual sampling points is not less than the first preset value and less than the second preset value, the value range corresponding to the density index of the sampling points is [0.6,0.8 ]; and when the density of the actual sampling point is not less than the second preset value, the value range corresponding to the density index of the sampling point is [0.8,1.0 ].
Optionally, the first preset value is 3 points/km2The second preset value is 6 points/km2。
Optionally, the weight value corresponding to the density of the sampling point is 1.
Optionally, the coal resource amount is provided with a third preset value and a fourth preset value, when the coal resource amount in the abnormal area is smaller than the third preset value, the coal mine is a small coal mine, and the value range corresponding to the coal resource amount index is (0, 0.6); when the coal resource amount of the abnormal area is not less than the third preset value and less than the fourth preset value, the coal mine is a medium-sized coal mine, and the value range corresponding to the coal resource amount index is [0.6,0.8 ]; and when the coal resource amount of the abnormal area is not less than the fourth preset value, the abnormal area is a large coal mine, and the value range corresponding to the coal resource amount index is [0.8,1.0 ].
Optionally, for the field, the third preset value is 0.5 × 108t, fourth preliminarySet to 1 × 108t。
Optionally, for a mining area, the third preset value is 2 × 108t, the fourth preset value is 5 × 108t。
Optionally, for the coal field, the third preset value is 10 × 108t, the fourth preset value is 50 × 108t。
Optionally, the weight value corresponding to the coal resource amount is 0.58.
And the estimation of the coal resource quantity of the abnormal area can obtain the coal resource quantity of the abnormal area according to the DZ/T0215-2002 coal and peat geological survey specification.
Optionally, the coal seam thickness is provided with a fifth preset value and a sixth preset value, when the actual coal seam thickness in the abnormal area is smaller than the fifth preset value, the coal seam is a thin coal seam, and the value range corresponding to the coal seam thickness index is (0, 0.6); when the actual coal seam thickness is not less than the fifth preset value and less than the sixth preset value, the coal seam is a thick coal seam and a medium coal seam, and the value range corresponding to the coal seam thickness index is [0.6,0.8 ]; and when the actual coal seam thickness is not less than the sixth preset value, the coal seam is a huge thick coal seam, and the value range corresponding to the coal seam thickness index is [0.8,1.0 ].
Optionally, the fifth preset value is 1.3m, and the sixth preset value is 8.0 m.
Optionally, the weight value corresponding to the coal seam thickness is 0.15.
Optionally, the actual coal seam thickness is an average value of the coal seam thicknesses of all sampling points, and the coal seam thickness is a coal seam true thickness.
Wherein M is the true thickness of the coal seam, L is the drilling pseudo thickness of the coal seam,
is the true tilt angle.
Optionally, the coal seam burial depth is provided with a seventh preset value and an eighth preset value, when the actual coal seam burial depth of the abnormal area is greater than the seventh preset value, the abnormal area is a deep coal seam, and the value range corresponding to the coal seam burial depth index is (0, 0.6); when the actual coal seam burial depth is not more than the seventh preset value and is more than the eighth preset value, the coal seam is a medium coal seam, and the value range corresponding to the coal seam burial depth index is [0.6,0.8 ]; and when the actual coal seam burial depth is not more than the eighth preset value, the coal seam is a shallow coal seam, and the value range corresponding to the coal seam burial depth index is [0.8,1.0 ].
Optionally, the seventh preset value is 1000m, and the eighth preset value is 600 m. The coal seam burial depth of 1200m is taken as a limit, and the corresponding value is 0.
Optionally, the weight value corresponding to the coal seam burial depth is 0.15.
Optionally, the actual coal seam burial depth is an average value of the coal seam burial depths of all sampling points, and the coal seam burial depth refers to a vertical distance between an original earth surface and a coal seam floor contour line.
Optionally, the coal seam stability is provided with three levels of unstable, relatively stable and stable ratings, and when the actual coal seam stability of the abnormal area is unstable, a value corresponding to a coal seam stability index is 0.6; when the actual coal seam stability is relatively stable, the value corresponding to the coal seam stability index is 0.8; when the actual coal seam stability is stable, the value corresponding to the coal seam stability index is 1.0.
Optionally, the weight value corresponding to the coal seam stability is 0.12.
Optionally, the actual coal seam stability is determined according to item 7 "assessment of coal seam stability" in mine geological regulations.
Specifically, in the evaluation of the coal seam stability, a thin coal seam (less than 1.3 m) takes a mining index Km as a main index, and a coal thickness variation coefficient gamma as an auxiliary index; the coal seam with medium thickness and above medium thickness takes the coal thickness variation coefficient gamma as a main index, and the mining index Km as an auxiliary index, and the following table is referred.
In the above table, Km = n'/n,
wherein n is the total number of the coal points (required to be uniformly distributed and representative) participating in coal thickness evaluation in the well field, and n' is the number of the coal points in which the coal thickness is greater than or equal to the mining thickness.
γ=S/mav×100%
Where Mi is the measured thickness of each sampling point, mavThe average coal thickness of a mine (or a subarea), n is the number of sampling points participating in evaluation, and S is the standard deviation of coal thickness variation.
Optionally, the raw coal grade content comprises four indexes of gallium raw coal grade content, lithium raw coal grade content, germanium raw coal grade content and rare earth raw coal grade content, and is used for evaluating the exploitation values of gallium, lithium, germanium and rare earth resources respectively. The weight value corresponding to the raw coal grade content is 0.65.
The grade content of the gallium raw coal is provided with a ninth preset value and a tenth preset value, and when the actual grade content of the gallium raw coal in the abnormal area is smaller than the ninth preset value, the value range corresponding to the grade content index of the gallium raw coal is (0, 0.6); when the actual gallium raw coal grade content is not less than the ninth preset value and less than the tenth preset value, the value range corresponding to the gallium raw coal grade content index is [0.6,0.8 ]; and when the actual gallium raw coal grade content is not less than the tenth preset value, the value range corresponding to the gallium raw coal grade content index is [0.8,1.0 ].
Optionally, the ninth preset value is 30 μ g/g, and the tenth preset value is 50 μ g/g.
The lithium raw coal grade content is provided with a 11 th preset value and a 12 th preset value, and when the actual lithium raw coal grade content in the abnormal area is smaller than the 11 th preset value, the value range corresponding to the lithium raw coal grade content index is (0, 0.6); when the actual lithium raw coal grade content is not less than the 11 th preset value and less than the 12 th preset value, the value range corresponding to the lithium raw coal grade content index is [0.6,0.8 ]; and when the actual lithium raw coal grade content is not less than the 12 th preset value, the value range corresponding to the lithium raw coal grade content index is [0.8,1.0 ].
Optionally, the 11 th preset value is 80 μ g/g, and the 12 th preset value is 120 μ g/g.
The grade content of the germanium raw coal is provided with a 13 th preset value and a 14 th preset value, and when the actual grade content of the germanium raw coal in the abnormal area is smaller than the 13 th preset value, the value range corresponding to the grade content index of the germanium raw coal is (0, 0.6); when the actual germanium raw coal grade content is not less than the 13 th preset value and less than the 14 th preset value, the value range corresponding to the germanium raw coal grade content index is [0.6,0.8 ]; and when the actual germanium raw coal grade content is not less than the 14 th preset value, the value range corresponding to the germanium raw coal grade content index is [0.8,1.0 ].
Optionally, the 13 th preset value is 20 μ g/g, and the 14 th preset value is 100 μ g/g.
The grade content of the rare earth raw coal is provided with a 15 th preset value and a 16 th preset value, and when the actual grade content of the rare earth raw coal in the abnormal area is smaller than the 15 th preset value, the value range corresponding to the grade content index of the rare earth raw coal is (0, 0.6); when the actual rare earth raw coal grade content is not less than the 15 th preset value and less than the 16 th preset value, the value range corresponding to the rare earth raw coal grade content index is [0.6,0.8 ]; when the actual rare earth raw coal grade content is not less than the 16 th preset value, the value range corresponding to the rare earth raw coal grade content index is [0.8,1.0 ].
Optionally, the 15 th preset value is 200 μ g/g, and the 16 th preset value is 300 μ g/g.
Optionally, the actual gallium raw coal grade content, the actual lithium raw coal grade content, the actual germanium raw coal grade content and the actual rare earth raw coal grade content are respectively an average value of gallium raw coal grade contents, an average value of lithium raw coal grade contents, an average value of germanium raw coal grade contents and an average value of rare earth raw coal grade contents of all sampling points.
And measuring the grade contents of gallium, lithium, germanium and rare earth raw coal in the coal sample of each sampling point by adopting ICP-MS (inductively coupled plasma-Mass Spectrometry).
Optionally, the raw coal grade change coefficient includes four indexes, namely a gallium raw coal grade change coefficient, a lithium raw coal grade change coefficient, a germanium raw coal grade change coefficient and a rare earth raw coal grade change coefficient, and is respectively used for evaluating the exploitation values of gallium, lithium, germanium and rare earth resources. The weight value corresponding to the raw coal grade change coefficient is 0.35.
The grade change coefficient of the gallium raw coal is provided with a 17 th preset value and a 18 th preset value, and when the actual grade change coefficient of the gallium raw coal in the abnormal area is greater than the 17 th preset value, the value range corresponding to the grade change coefficient index of the gallium raw coal is (0, 0.6); when the actual gallium raw coal grade change coefficient is not more than the 17 th preset value and is more than the 18 th preset value, the value range corresponding to the gallium raw coal grade change coefficient index is [0.6,0.8 ]; and when the actual gallium raw coal grade change coefficient is not more than the 18 th preset value, the value range corresponding to the gallium raw coal grade change coefficient index is [0.8,1.0 ].
Optionally, the 17 th preset value is 80%, and the 18 th preset value is 30%. The grade change coefficient of the gallium raw coal is 200% as a limit, and the corresponding value is 0.
The lithium raw coal grade change coefficient is provided with a 19 th preset value and a 20 th preset value, and when the actual lithium raw coal grade change coefficient in the abnormal area is greater than the 19 th preset value, the value range corresponding to the lithium raw coal grade change coefficient index is (0, 0.6); when the actual lithium raw coal grade change coefficient is not more than the 19 th preset value and is more than the 20 th preset value, the value range corresponding to the lithium raw coal grade change coefficient index is [0.6,0.8 ]; and when the actual lithium raw coal grade change coefficient is not more than the 20 th preset value, the value range corresponding to the lithium raw coal grade change coefficient index is [0.8,1.0 ].
Optionally, the 19 th preset value is 180%, and the 20 th preset value is 80%. The lithium raw coal grade change coefficient is 200% as a limit, and the corresponding value is 0.
The germanium raw coal grade change coefficient is provided with a 21 st preset value and a 22 nd preset value, and when the actual germanium raw coal grade change coefficient in the abnormal area is greater than the 21 st preset value, the value range corresponding to the germanium raw coal grade change coefficient index is (0, 0.6); when the actual germanium raw coal grade change coefficient is not more than the 21 st preset value and is more than the 22 nd preset value, the value range corresponding to the germanium raw coal grade change coefficient index is [0.6,0.8 ]; and when the actual germanium raw coal grade change coefficient is not more than the 22 th preset value, the value range corresponding to the germanium raw coal grade change coefficient index is [0.8,1.0 ].
Optionally, the 21 st preset value is 180%, and the 22 nd preset value is 80%. The grade change coefficient of the germanium raw coal is 200% as a limit, and the corresponding value is 0.
The grade change coefficient of the rare earth raw coal is provided with a 23 th preset value and a 24 th preset value, and when the actual grade change coefficient of the rare earth raw coal in the abnormal area is greater than the 23 th preset value, the value range corresponding to the grade change coefficient index of the rare earth raw coal is (0, 0.6); when the actual grade change coefficient of the rare earth raw coal is not more than the 23 th preset value and is more than the 24 th preset value, the value range corresponding to the grade change coefficient index of the rare earth raw coal is [0.6,0.8 ]; and when the actual rare earth raw coal grade change coefficient is not more than the 24 th preset value, the value range corresponding to the rare earth raw coal grade change coefficient index is [0.8,1.0 ].
Optionally, the 23 rd preset value is 120%, and the 24 th preset value is 60%. The grade change coefficient of the rare earth raw coal is 200% as a limit, and the corresponding value is 0.
Optionally, the grade change coefficient of the raw coal of germanium/gallium/lithium/rare earth is calculated as follows:
wherein the content of the first and second substances,
vc is the coefficient of grade change,
ccp is the mean square error of the grade, Ci is the grade value of each sampling point, and n is the number of sampling points.
Optionally, the specific method for comparing the actual data of the seven indexes in the abnormal area with the corresponding index preset values respectively and taking the corresponding numerical values according to the comparison result includes: after the actual values of the seven indexes are compared with the preset values, when the values are taken, the preset values are used as abscissa and the boundary values of the value taking range are used as ordinate in the determined value taking range; when the value is (0,0.6), and the data is less than two groups, complementing by 0, drawing a fitting straight line, taking the actual value as a horizontal coordinate to be substituted into an equation of the obtained fitting straight line, and calculating to obtain a corresponding value; and when the value is [0.8,1.0), the value obtained by calculation is more than 1, and the value is 1.
For example, for the index of sampling point density, the actual sampling point density is 2 points/km2Is less than the first preset value by 3 points/km2The value range is (0,0.6), 0 and 3 are abscissa, 0 and 0.6 are ordinate, that is, two points (0,0) and (3,0.6) are used to draw a fitted straight line, so as to obtain a straight line equation y =0.2x, then 2 is used as abscissa and is substituted into the equation, the corresponding value is calculated to be 0.4, and the value 0.4 is multiplied by the weight value 1 corresponding to the density of the sampling point, so as to obtain 0.4, that is, the evaluation value of the working degree.
As another example, for geological conditions, the actual amount of coal resources is 8000 × 104t, the value range is [0.6,0.8 ], a fitting straight line is drawn by two points of (5000,0.6) and (10000,0.8), and a straight line equation y =4 × 10 is obtained-5x +0.4, then taking 8000 as a horizontal coordinate into the equation, calculating to obtain a corresponding value of 0.72, and multiplying the value by a weight value of 0.58 of the coal resource amount to obtain 0.418, namely the evaluation value of the coal resource amount index;
the actual coal seam thickness is 11m, the value range is [0.8,1.0 ], a fitting straight line is drawn by two points of (0,0) and (8,0.8), a straight line equation y =0.1x is obtained, then 11 is taken as a horizontal coordinate and is introduced into the equation, the corresponding value is calculated to be 1.1 and is larger than the boundary value 1 of the value range, so the value is 1, and the value is multiplied by the weighted value of the coal seam thickness to be 0.15, and the value is 0.15, namely the evaluation value of the coal seam thickness index;
the actual coal seam buried depth is 1100m, the value range is (0,0.6), a fitting straight line is drawn by two points of (1200,0) and (1000,0.6), and a straight line equation y = -3 multiplied by 10 is obtained-3x +3.6, then, taking 1100 as a horizontal coordinate to be substituted into the equation, calculating to obtain a corresponding value of 0.3, and multiplying the value by a weighted value of the coal seam burial depth of 0.15 to obtain 0.045, namely an evaluation value of the coal seam burial depth index;
the actual coal seam stability is relatively stable, the value is 0.8, and the weight value multiplied by the coal seam stability is 0.12, so that 0.096 is obtained; the geological condition was evaluated as 0.418+0.15+0.045+0.096= 0.709.
For mineral conditions, the actual germanium raw coal grade content is 50 mug/g, the value range is [0.6,0.8 ], a fitting straight line is drawn by two points of (20,0.6) and (100,0.8), and a straight line equation y =2.5 × 10 is obtained-3x +0.55, then taking 50 as a horizontal coordinate into the equation, calculating to obtain a corresponding value of 0.675, and multiplying the value by the weight value of the raw coal grade content of 0.65 to obtain 0.439;
the actual germanium raw coal grade change coefficient is 60%, the value range is [0.8,1.0 ], a fitting straight line is drawn by two points of (80,0.6) and (0,1.0), and a straight line equation y = -5 multiplied by 10 is obtained-3x +1, then taking 60 as a horizontal coordinate to be introduced into the equation, calculating to obtain a corresponding value of 0.7, and multiplying the value by a weight value of the raw coal grade content of 0.35 to obtain 0.245; the evaluation value of the mineral condition was 0.439+0.245= 0.684.
Optionally, the working degree is provided with two preset ranges, namely (0,0.6) and [0.6, 1.0); the evaluation value of the working degree falls in the range of (0,0.6), which indicates that the working degree is poor, the sampling points are few, the obtained data representativeness of other six indexes is insufficient, and the sampling points are increased; the evaluation value of the degree of operation falls within the range of [0.6,1.0), indicating that the degree of operation is acceptable.
Optionally, the geological condition has three preset ranges, namely (0,0.6), (0.6, 0.8) and (0.8, 1.0); the evaluation value of the geological condition falls into the range of (0,0.6), which indicates that the geological condition of the coal mine is poor and the mining difficulty is high; the evaluation value of the geological condition falls in the range of [0.6,0.8), which indicates that the geological condition of the coal mine is moderate and the mining difficulty is moderate; the evaluation value of the geological conditions falls within the range of [0.8,1.0 ], which indicates that the geological conditions of the coal mine are better, the mining difficulty is lower, and the resource development of germanium/gallium/lithium/rare earth elements is facilitated.
Optionally, the mineral conditions are set to four preset ranges, namely (0,0.4), [0.4,0.6), [0.6,0.8) and [0.8, 1.0); the evaluation value of mineral conditions falls within the range of (0,0.4), indicating that the resource potential of germanium/gallium/lithium/rare earth elements is not large; the evaluation value of mineral conditions falls within the range of [0.4,0.6), which indicates that germanium/gallium/lithium/rare earth elements are a mineral resource associated with coal in the region and is recommended to be developed in cooperation with the coal; the evaluation value of mineral conditions falls in the range of [0.6,0.8), which shows that the content and value of germanium/gallium/lithium/rare earth elements in the coal-fired product are focused; the evaluation value of mineral conditions falls within the range of [0.8,1.0), and it is recommended to arrange a survey work for germanium/gallium/lithium/rare earth element mineral resources in coal.
Optionally, for the raw coal grade content index, if the actual gallium/lithium/germanium/rare earth raw coal grade content is respectively less than the ninth preset value of 30 μ g/g, the 11 th preset value of 80 μ g/g, the 13 th preset value of 20 μ g/g and the 15 th preset value of 200 μ g/g, that is, respectively less than the respective boundary grade content, the value ranges of the raw coal grade content index and the raw coal grade content index are (0,0.6), at this time, it is directly determined that the resource potential of gallium/lithium/germanium/rare earth elements in the coal is not large, and the evaluation values of the working degree and the geological conditions do not need to be paid attention.
In the above example, the evaluation value of the working degree is 0.4, which falls in the range of (0,0.6), and indicates that the working degree is poor, the sampling points are few, the obtained data of other six indexes has insufficient representativeness, and the sampling points are suggested to be increased; the evaluation value of the geological condition is 0.709 and falls into the range of [0.6,0.8), which indicates that the geological condition of the coal mine is moderate and the mining difficulty is moderate; the evaluation value of the mineral conditions was 0.684, and falls within the range of [0.6,0.8), indicating that the content and value of germanium element in the coal-fired product are of great concern.
For another example, for mineral conditions, the actual gallium raw coal grade content is 80 μ g/g, the value range is [0.8,1.0 ], a fitting straight line is drawn by two points (0,0) and (50,0.8) to obtain a straight line equation y =0.016x, then 80 is taken as a horizontal coordinate and is substituted into the equation to obtain 1.28 which is larger than 1.0, the corresponding value is 1.0, and the weight value is multiplied by 0.65 of the raw coal grade content to obtain 0.65;
the actual gallium raw coal grade change coefficient is 30%, the corresponding value is directly obtained to be 0.8, and the value is multiplied by the weight value of the raw coal grade content to be 0.35 to obtain 0.28; the evaluation value of mineral conditions was 0.65+0.28= 0.93.
In the above example, the evaluation value of the mineral conditions was 0.93, falling within the range of [0.8,1.0), suggesting that the exploration work for the mineral resources of gallium element in coal is arranged, with the potential to develop gallium alone.
For another example, for mineral conditions, the actual lithium raw coal grade content is 50 μ g/g, the value range is (0,0.6), a fitting straight line is drawn by two points of (0,0) and (80,0.6), so as to obtain a straight line equation y =0.0075x, then 50 is taken as a horizontal coordinate to be introduced into the equation, and the corresponding value is calculated to be 0.375, and is multiplied by the weight value of the raw coal grade content, so as to obtain 0.244;
the actual lithium raw coal grade change coefficient is 190%, the value range is (0,0.6), a fitting straight line is drawn by two points of (180,0.6) and (200,0), a straight line equation y = -0.03x +6 is obtained, then 190 is taken as a horizontal coordinate to be introduced into the equation, the corresponding value is calculated to be 0.3, and the value is multiplied by the weight value of the raw coal grade content to be 0.35, so that 0.105 is obtained; the evaluation value of the mineral conditions was 0.244+0.105= 0.349.
In the above example, the evaluation value of the mineral condition was 0.349, which falls within the range of (0,0.4), indicating that the resource potential of lithium element is not large. In the example, because the actual lithium raw coal grade content is less than 80 mug/g, namely less than the boundary grade content, the value range is (0,0.6), at this time, the resource potential of the lithium element in the coal is directly judged to be not large, and the evaluation values of the working degree and the geological conditions do not need to be paid attention again.
For another example, for mineral conditions, the actual rare earth raw coal grade content is 200 μ g/g, the value is directly 0.6, and the product is multiplied by the weight value of the raw coal grade content of 0.65 to obtain 0.39;
the actual rare earth raw coal grade change coefficient is 190%, the value range is (0,0.6), a fitting straight line is drawn by two points of (120,0.6) and (200,0), a straight line equation y = -0.0075x +1.5 is obtained, then 190 is taken as a horizontal coordinate to be introduced into the equation, the corresponding value is calculated to be 0.075, and the value is multiplied by the weight value of the raw coal grade content to be 0.35 to obtain 0.026; the evaluation value of the mineral conditions was 0.39+0.026= 0.416.
In the above example, the evaluation value of the mineral conditions was 0.416, falling within the range of [0.4,0.6), indicating that the rare earth element is a mineral resource associated with coal in the area, and it is suggested to be developed in cooperation with coal.
Claims (10)
1. A comprehensive evaluation method of germanium, gallium, lithium and rare earth resources in coal is characterized by comprising an abnormal area delineating stage and a resource evaluation stage,
the abnormal region delineation stage comprises: according to the pre-acquired basic geological data of the coal mining area, delineating a coal series mineral enrichment area;
collecting a sample from the enrichment area, and detecting trace elements of the sample;
determining the range of an evaluation area according to the detection result data and the predetermined evaluation standard of germanium, gallium, lithium and rare earth;
determining the range of the abnormal area according to the predetermined metal enrichment standard of the sampling point in the evaluation area;
the resource evaluation phase comprises the following steps: collecting a sample from the abnormal area, and testing the sample;
and comparing the test result data with the evaluation standards of the predetermined working degree, geological conditions and mineral conditions, and evaluating the resources of germanium, gallium, lithium and rare earth in the coal mine.
2. The comprehensive evaluation method according to claim 1, wherein the evaluation criteria of germanium, gallium, lithium and rare earth are: the method comprises the steps that germanium, gallium, lithium and rare earth elements in coal respectively reach respective predetermined boundary grade contents, wherein the boundary grade contents of the germanium, the gallium, the lithium and the rare earth are respectively 20 mug/g, 30 mug/g, 80 mug/g and 200 mug/g.
3. The comprehensive evaluation method according to claim 1, wherein the metal enrichment criteria of the sampling points in the evaluation area are: the density of the sampling points is not less than 3 points/km2The key metal enrichment coefficient CC in coal>And 5, the grade content of at least 30% of sampling points meets the boundary grade content requirement of corresponding metals.
4. The comprehensive evaluation method of claim 1, wherein the evaluation of the resources of germanium, gallium, lithium and rare earth in the coal mine by comparing the test result data with the predetermined evaluation criteria of working degree, geological conditions and mineral conditions comprises the following steps:
determining an evaluation standard of the working degree according to the predetermined classification of the density of the sampling points;
determining an evaluation standard of geological conditions according to a predetermined standard of coal resource quantity, a predetermined standard of coal seam thickness, a predetermined standard of coal seam stability and a predetermined standard of coal seam burial depth;
and determining the evaluation standard of mineral conditions according to the predetermined standard of the raw coal grade content and the standard of the raw coal grade change coefficient.
5. The comprehensive assessment method according to claim 4, wherein said grading of the density of sample points comprises<3 points/km23-6 points/km2And is not less than 6 points/km2；
The standard of the coal resource amount is as follows: dividing different types of coal mines into a well field, a mining area and a coal field; for different types of coal mines, the coal mines are divided into large, medium and small coal mines according to the quantity of coal resources;
the standard of the coal seam thickness is as follows: according to the thickness of the coal bed, the coal bed is divided into a thin coal bed, a thick coal bed, a medium coal bed and a thick coal bed, wherein the thickness of the thin coal bed is less than 1.3m, the thickness of the thick coal bed and the medium coal bed is 1.3-8.0m, and the thickness of the thick coal bed is more than or equal to 8.0 m;
the standard of the coal seam stability is as follows: dividing the coal bed into an unstable coal bed, a more stable coal bed and a stable coal bed according to the second item 'evaluation of coal bed stability' in 'mine geological regulations';
the standard of the coal seam burial depth is as follows: referring to a scheme for dividing the coal bed burial depth grade in national coal resource potential evaluation, dividing the coal bed burial depth into three grades: the shallow coal layer is less than or equal to 600m, the medium coal layer is 600-1000m and the deep coal layer is more than 1000 m.
6. The comprehensive assessment method according to claim 5, wherein the raw coal grade content criteria are, optionally: grading the raw coal grade contents of germanium, gallium, lithium and rare earth in the coal according to respective boundary grade, lowest industrial grade and rich ore grade;
optionally, the standard of the raw coal grade variation coefficient is as follows:
the grade change coefficient of the germanium raw coal is divided into three stages: more than 180 percent, 180-80 percent and less than or equal to 80 percent;
the grade change coefficient of the gallium raw coal is divided into three stages: more than 80 percent, 80-30 percent and less than or equal to 30 percent;
the grade change coefficient of the lithium raw coal is divided into three stages: more than 180 percent, 180-80 percent and less than or equal to 80 percent;
the grade change coefficient of the rare earth raw coal is divided into three stages: more than 120 percent, 120-60 percent and less than or equal to 60 percent.
7. The comprehensive evaluation method according to claim 6, wherein the resource evaluation stage establishes a resource evaluation index system of germanium, gallium, lithium and rare earth in coal, the resource evaluation index system comprises a condition level and an index level, the condition level comprises a working degree, a geological condition and a mineral condition, and the index level comprises seven indexes;
the working degree comprises indexes of sampling point density, the geological conditions comprise four indexes of coal resource quantity, coal seam thickness, coal seam stability and coal seam burial depth, and the mineral conditions comprise two indexes of germanium/gallium/lithium/rare earth content and grade change coefficient in coal.
8. The comprehensive evaluation method according to claim 7, wherein the resource evaluation phase is provided with corresponding index preset values and weight values for the seven indexes respectively; actual data of seven indexes in the abnormal area are respectively compared with corresponding index preset values, corresponding numerical values are obtained according to comparison results, and the obtained numerical values are multiplied by weight values of the corresponding indexes to obtain evaluation values of the corresponding indexes;
adding the evaluation values of all indexes belonging to the same condition to obtain the evaluation value of the condition;
and the three conditions of the condition level are respectively provided with corresponding preset ranges, the abnormal areas are graded according to the fact that the evaluation values of different conditions respectively fall into the corresponding preset ranges, and corresponding development strategies are adopted according to the grades.
9. The comprehensive evaluation method according to claim 8, wherein after the actual data of the seven indexes are compared with preset values, when values are taken, the preset values are used as abscissa and the boundary values of the value ranges are used as ordinate in the determined value ranges, when the data are less than two groups, the data are complemented by 0, a fitting straight line is drawn, then the actual values are used as abscissa and are substituted into the equation of the obtained fitting straight line, and the corresponding values are obtained through calculation;
and when the value is [0.8,1.0), the value obtained by calculation is more than 1, and the value is 1.
10. The comprehensive evaluation method according to claim 9, wherein the working degree is provided with two preset ranges, namely (0,0.6) and [0.6, 1.0);
the geological condition is provided with three preset ranges, namely (0,0.6), [0.6,0.8) and [0.8, 1.0);
the mineral conditions are set to four preset ranges, namely (0,0.4), [0.4,0.6), [0.6,0.8) and [0.8, 1.0).
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| CN116681407A (en) * | 2023-07-20 | 2023-09-01 | 华夏天信物联科技有限公司 | Industrial Internet of things platform based on coal mining |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116681407A (en) * | 2023-07-20 | 2023-09-01 | 华夏天信物联科技有限公司 | Industrial Internet of things platform based on coal mining |
| CN116681407B (en) * | 2023-07-20 | 2023-10-20 | 华夏天信物联科技有限公司 | Industrial Internet of things platform based on coal mining |
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