CN114047559B - Method for determining uranium ore distribution area - Google Patents
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- CN114047559B CN114047559B CN202111275719.2A CN202111275719A CN114047559B CN 114047559 B CN114047559 B CN 114047559B CN 202111275719 A CN202111275719 A CN 202111275719A CN 114047559 B CN114047559 B CN 114047559B
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Abstract
The present application relates to testing or analysing materials by means of determining their chemical or physical properties, and in particular to a method of determining the distribution area of uranium ores, comprising: acquiring drilling data, a mineral layer and a mineral formation period of a target area; recovering the ore-forming period structure of the ore-forming layer according to the drilling data; defining a raised area, a slope area and a recessed area in a target area according to the thickness of the ore formation construction; acquiring seismic data of the raised area to invert the development history of the raised area according to the seismic data; defining and controlling a mineral protuberance zone in the protuberance zone according to the development history of the protuberance zone; the uranium deposit distribution region is determined in a ramp region surrounding the controlled deposit protuberance region. The method for determining the uranium deposit distribution areas provided by the embodiment of the application has higher accuracy.
Description
Technical Field
The application relates to the technical field of testing or analyzing materials by means of determining chemical or physical properties of the materials, in particular to a method for determining uranium ore distribution areas.
Background
Prediction of uranium ore distribution areas is generally based on current geological features, and ore control factors and prediction elements are determined to evaluate ore potential. However, in some regions undergoing multi-stage structural evolution, the structural background is relatively complex, the structural properties of different stages may be the same or opposite, and the present-day structural appearance is formed by multi-stage structural superposition and reconstruction, and is likely to have a large structural difference from the ore-forming stage, so that the deviation of the determined uranium ore distribution region from the actual uranium ore distribution region is large.
Disclosure of Invention
The present application has been made in view of the above problems, and has as its object to provide a method of determining uranium deposit distribution areas which overcomes or at least partially solves the above problems.
According to an embodiment of the present application, there is provided a method of determining uranium deposit distribution, including: acquiring drilling data, a mineral layer and a mineral formation period of a target area; recovering an ore formation period structure of the ore-forming horizon according to the drilling data; defining a raised area, a slope area and a recessed area in the target area according to the thickness of the ore formation period structure; acquiring seismic data of the bulge area to invert the development history of the bulge area according to the seismic data; defining a mine-controlling raised region in the raised region according to the development Shi Zaisuo of the raised region; a uranium deposit distribution region is determined in the ramp region around the controlled deposit protuberance region.
The method for determining the uranium deposit distribution areas according to the embodiment of the application has higher accuracy.
Drawings
Figure 1 is a flow chart of a method of determining uranium deposit distribution areas according to an embodiment of the present application;
FIG. 2 is a schematic view of a recovery of a mineral formation in accordance with an embodiment of the present application;
FIG. 3 is a schematic view of the calculation of the ablation amount according to an embodiment of the present application;
FIG. 4 is a schematic view of raised, recessed, and sloped regions according to an embodiment of the present application;
FIG. 5 is a schematic representation of a development history of a bulge region, in accordance with an embodiment of the present application;
fig. 6 is a schematic view of a uranium deposit distribution region according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present application. It will be apparent that the described embodiments are one embodiment, but not all embodiments, of the present application. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present application fall within the protection scope of the present application.
It is to be noted that unless otherwise defined, technical or scientific terms used herein should be taken in a general sense as understood by one of ordinary skill in the art to which the present application belongs. If, throughout, reference is made to "first," "second," etc., the description of "first," "second," etc., is used merely for distinguishing between similar objects and not for understanding as indicating or implying a relative importance, order, or implicitly indicating the number of technical features indicated, it being understood that the data of "first," "second," etc., may be interchanged where appropriate. If "and/or" is present throughout, it is meant to include three side-by-side schemes, for example, "A and/or B" including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously.
The embodiment of the application provides a method for determining uranium ore distribution areas, which comprises the following steps:
step S102: and acquiring drilling data, a mineral layer and a mineral formation period of the target area.
Step S104: and recovering the ore-forming period structure of the ore-forming layer position according to the drilling data.
Step S106: the elevated, sloped, and recessed regions are defined in the target area according to the thickness of the formation.
Step S108: seismic data of the mound area is acquired to invert a history of development of the mound area based on the seismic data.
Step S110: and defining and controlling the mineral protuberance zone in the protuberance zone according to the development history of the protuberance zone.
Step S112: the uranium deposit distribution region is determined in a ramp region surrounding the controlled deposit protuberance region.
In step S102, the target region may be a region having a uranium deposit distribution possibility obtained by a person skilled in the art through existing data analysis, for example, a certain region in a sedimentary basin obtained from existing geological data. The person skilled in the art may obtain, supplement, collect (e.g. additionally arranging boreholes in some areas to supplement data not available in existing boreholes) the desired geological data by taking into account existing geological data, such as the base geology of the target area, the logging, logging data of typical deposits and constructed boreholes, seismic data, etc. or alternatively, the person skilled in the art may obtain, supplement, etc. the desired geological data by field surveys. The borehole data may include various data that may be acquired by borehole detection, such as formation thickness, formation burial depth, sand distribution, etc., at the borehole, and the specific borehole data used will be described in relevant detail below and will not be repeated here. In combination with borehole data and other geological data, the mining horizon and mining period in the target area may be analyzed and acquired.
Ore-bearing horizons may refer to one or more strata in a target region where there may be more than one ore-bearing horizon, and the methods of determining uranium ore distribution regions described below are typically performed for one ore-bearing horizon, although it is understood that when there are multiple ore-bearing horizons, the uranium ore distribution regions in each ore-bearing horizon may be determined using the related methods described below for uranium ore distribution regions. Those skilled in the art may analyze the obtaining of the mining horizon in the target area according to related technologies in the art, for example, perform analysis of the ore control element according to related geological data to obtain the mining horizon, or obtain the horizon where the uranium ore is found to exist according to related mining records as the mining horizon, etc., which will not be described herein.
The term "mineral formation" refers to the period of primary mineral formation, and determination of the term "mineral formation" will be of great importance for analysis of the formation of the mineral formation, in particular for inversion of the development history of the rise region and determination of the controlled rise region, described hereinafter, and specific technical details will be described in the relevant sections hereinafter. The person skilled in the art can determine the ore formation period according to the data such as uranium-lead age, fracture distribution, and structural condition in the geological data, or can determine the ore formation age through sampling analysis (e.g. infrared spectrum analysis), and the like, which will not be described in detail herein.
In step S104, the formation of the mineralised horizon may be restored from the borehole data, which may include, as described above, base data of the roof burial depth, floor burial depth, sand thickness, etc. of each formation at the borehole, from which a formation back-stripping calculation may be performed to restore the formation to the formation, which may be achieved by, for example, compaction correction formulas, a specific implementation of which will be described in the relevant sections below. The recovery of the formation may also be performed by other suitable methods by those skilled in the art. In some embodiments, after formation back-stripping calculations are performed, calculations of the amount of erosion are also required to be able to accurately restore the formation to the mine-stage configuration.
In step S106, the bump area, the slope area, and the depression area may be defined in the target area according to the thickness of the mine-forming period structure, and it is understood that the mine-forming period structure is restored according to the relevant geological data in the target area, so that the restored mine-forming period structure is in a substantially corresponding relationship with the current structure in the target area, the bump, the depression, and the slope in the mine-forming period structure may be determined according to the restored mine-forming period structure, and the bump area, the depression area, and the slope area corresponding to the bump, the depression, and the slope are determined in the target area accordingly. Specifically, a depression refers to a location of relatively high thickness of the mine-forming formation (exhibiting a depression compared to the overall formation of the region), a bump refers to a location of relatively low thickness of the mine-forming formation (exhibiting a bump compared to the overall formation of the region), and a ramp refers to a location of thickness between the bump and the depression, and as a result of the formation thickness variation having some continuity, a ramp is typically present between the bump and the depression or between the two bumps. The slope between the bump and the pit is usually an ancient groundwater runoff area in the ore-forming period, which is beneficial to the development of infiltration oxidation and uranium mineralization, and has a high possibility of uranium ore distribution. It should be noted that, multiple raised areas, recessed areas or sloped areas may be distributed in a target area at the same time, and the methods performed in one raised area described in one or more embodiments below are equally applicable to other raised areas, and generally need to be performed in all raised areas at the same time, and relevant portions will not be repeated below.
Compared with the method for determining the uranium deposit distribution area according to the existing geological structure, which is commonly used in the art, the method provided by the embodiment of the application has the advantages that the structure of the ore forming period is restored, the uranium deposit distribution area is determined from the existing structure based on the restored ore forming period structure, and the change of the uranium deposit distribution area caused by the geological structure change after the ore forming period can be eliminated as much as possible, so that the accuracy is higher.
In step S108, seismic data for the mound may be acquired to invert a history of development of the mound based on the seismic data, and then in step S110, the mound may be defined and controlled in the mound based on the history of development of the mound. Those skilled in the art can acquire seismic data for the bump area from existing geological data, or can acquire seismic data by placing a seismic line in the bump area. After the seismic data is acquired, inversion can be performed on the development history of the bulge area according to the seismic data, and the inversion can be implemented by professional software in related technologies in the field, such as 2d mode, etc., and the person skilled in the art can select the inversion according to actual situations, which is not described herein.
The inventor of the application proposes that the development process of the bulge controls the formation of uranium ores in the ore-forming horizon and has the effect of modifying the uranium ores into ores, the formation times, the development stages, the denudation process and the overburden effect of the bulge can be obtained by inverting the development history of the bulge area, the processes are related to the ore-forming stage, and in combination with the related principles of uranium ore formation, ore control factors and the like, whether uranium ores develop around the bulge position can be accurately judged, and the disturbance of structural change after the ore-forming stage can be eliminated as far as possible, and when the fact that uranium ores possibly develop around a certain position of the bulge is judged, the position can be determined as the ore-controlling bulge area.
In step S112, a uranium deposit distribution region may be further determined in a slope region around the determined controlled deposit elevation region. As described above, the slope region is usually an archaic groundwater runoff region in the ore forming period, which is beneficial to the development of infiltration oxidation and uranium mineralization, and the ore control ridge region is closely related to the formation of uranium ore, so that the possibility that uranium ore distribution exists in the slope region around the ore control ridge region is high. In determining the uranium deposit distribution region, slope regions within a certain range around the mine control protrusion region may be determined as the uranium deposit distribution region, the uranium deposit distribution region may be determined in the surrounding slope regions in combination with specific configurations in the mine control protrusion region, and the uranium deposit distribution region may be determined in combination with geological data such as sand distribution data in the slope regions, which will be described in the relevant portions below. The person skilled in the art may also combine other methods of determining the uranium deposit distribution area in the field to further determine the uranium deposit distribution area in the slope region around the controlled-ore-lifting region, which is not particularly limited.
According to the method for determining the uranium deposit distribution area, provided by the embodiment of the application, not only is the ore formation structure of the ore formation layer in the whole target area recovered, but also the development history of the raised area determined by the ore formation structure is inverted, so that the influence of geological structure evolution after the ore formation on the uranium deposit distribution area is eliminated as much as possible, and the accuracy of the method for determining the uranium deposit distribution area is higher.
In some embodiments, in step S104, a compaction correction equation may be specifically used to determine a recovery thickness and/or recovery depth of the mineforming horizon and obtain an ablation amount of the mineforming horizon to determine a mineforming period configuration of the mineforming horizon from the recovery thickness and/or recovery depth and the ablation amount. As described above, after the recovery of the mine-forming structure, the division of the raised area, the recessed area, and the slope area is required according to the thickness of the mine-forming structure, and therefore, in this embodiment, the recovery is focused on the formation thickness of the mine-forming layer when the recovery of the mine-forming structure is performed.
Part a in fig. 2 shows the mine-forming period configuration recovered according to the recovered thickness and the amount of ablation, and part B shows the mine-forming period configuration recovered according to the recovered burial depth and the amount of ablation. It will be appreciated that the thickness of the in-mine formation can be determined directly from the recovery thickness and the ablation amount, while the thickness of the in-mine formation can be determined indirectly from the recovery depth and the ablation amount (e.g., the recovery depth can include the recovery depth of the bottom plate and the recovery depth of the top plate of the in-mine formation), with the difference that the in-mine formation determined using the recovery thickness and the ablation amount can better reflect the elevation, depression pattern of the in-mine formation itself, while the in-mine formation determined using the recovery depth and the ablation amount can reflect to some extent the overall formation morphology, depth, etc. of other horizons (e.g., one or more strata overlying the in-mine formation) other than the in-mine formation.
The compaction correction formula is commonly used as follows:
S=（Y 2 -Y 1 ）（1-Φ 0 e -CZ ）/（1-Φ 0 ）
s is the recovery thickness obtained by compaction correction; y is Y 2 Is the bottom depth of the stratum; y is Y 1 For formation top depths, as described above, Y may be included in the borehole data 1 And Y 2 。Φ 0 For the surface porosity, C is a compaction coefficient, the values of the C and the C are mainly related to lithology, sandstone uranium ores are mainly produced in land sedimentary basins, the lithology can be simply divided into sandstone and mudstone, and a person skilled in the art can obtain lithology data of a mineral formation layer according to drilling data, and then determine phi according to experience values of related parameters 0 And C, the recommended experience values of the relevant parameters can be seen in table 1;
table 1 list of different lithology calculation parameters
The restoration depth may be calculated in a similar manner to the restoration thickness calculation described above (e.g., by simply modifying the above equation), and will not be described in detail herein.
The purpose of calculating the ablation is to calculate the formation ablation thickness to complement the recovered thickness or recover the burial depth, and to remodel the original appearance of the elevated area. The calculation of the ablation amount may be performed by a well-known method in the art, such as apatite fission track method, specular reflection method, sonic time difference method, etc., and may be selected by those skilled in the art according to the actual situation, which is not particularly limited.
In the actual recovery into the mine formation, the recovery thickness and/or recovery burial depth described above may be performed for the data in each borehole in the target zone and added to the ablation volume. Thereafter, the restoration results in all the boreholes may be integrated to draw a contour map to obtain a recovery thickness-based mine-forming period structure as shown in part a and/or a recovery burial depth-based mine-forming period structure as shown in part B of fig. 2, and it is understood that although the contour map depicts a mine-forming period structure, data therein is calculated from the boreholes in the target area so that coordinates thereof actually correspond to the target area, whereby in the subsequent correlation step, determination of the ridge area, the pit area, and the slope area may be completed in the target area after the thickness of the mine-forming period structure is obtained from the data in the contour map.
In some embodiments, in calculating the ablation amount, the ablation area may first be determined from the seismic data or borehole data of the target area, and then the ablation amount in the ablation area may be determined using a sonic jet lag method based on the borehole data in the ablation area.
Degraded areas refer to areas that are formed by degradation as judged by existing formations in the target area, and one skilled in the art can determine whether degraded areas are present based on seismic data (e.g., cuts in a seismic profile) or borehole data (e.g., formation development in a borehole).
Fig. 3 shows a schematic diagram for determining the ablation amount by using the sonic jet lag method, two curves S1 and S2 shown in fig. 3 are sonic logging data based on drilling, and a porosity-depth relation equation is obtained by fitting by using plane projection software such as excel, grapher, wherein in an ablated region, the sonic logging data at an ablation point has a relatively obvious mutation, so that two different fitting curves, namely curves S1 and S2 in fig. 3, appear above and below the ablation point, and at this time, the ablation amount can be determined based on the difference value between the curves S1 and S2. The sonic jet lag method is used for determining the ablation quantity, and the existing drilling holes can be used for acquiring data, so that a certain cost is saved. In some embodiments, as described above, the ablation zone may also be determined by means of borehole data, so that calculating the ablation amount using sonic logging data in the borehole also better corresponds the ablation amount to the ablation zone. In these embodiments, if a borehole is in the ablation zone when the formation is restored to the mine, the restored thickness and/or restored burial depth obtained from the data at the borehole needs to be added to the ablation volume at the borehole.
In some embodiments, when seismic data is used to determine the ablation area, the cutting points in each seismic section may be determined according to the seismic data, and then the closed area formed by connecting the cutting points in each seismic section on a plane is determined as the ablation area. The method is mainly applicable to the situation that the top boundary of a target layer is regional and is not integrated (generally corresponding to a seismic reflection structure).
In some embodiments, when using borehole data to determine the ablation region, the mining horizon and development data of the formation overlying the mining horizon at each borehole may be obtained from the borehole data, and then the ablation region may be determined from the mining horizon and development data of the formation overlying the mining horizon. Specifically, the skylight part with the missing mineral-forming layer is a complete ablation area, and a wedge-shaped area with the partial ablation of the stratum is arranged between the complete ablation boundary of the mineral-forming layer and the complete ablation boundary of the overlying stratum, and the ablation area can be defined according to superposition of the complete ablation boundary and the complete ablation boundary of the mineral-forming layer. The use of borehole data to determine that the degraded area belongs to single point control is relatively low in accuracy, has the advantage of being able to be developed for the mineralised zone alone, and is relatively easy to obtain.
One skilled in the art may choose to restore one of the recovery thickness and the recovery depth to the mine-stage configuration according to the actual situation, or may choose to use both methods simultaneously and combine the results obtained by both methods to restore the mine-stage configuration, which is not particularly limited.
After the mine formation is restored according to the method described in the above embodiments, the definition of the raised areas, recessed areas, and sloped areas may begin.
In some embodiments, in determining the raised region, the recessed region, and the sloped region, a threshold value may be first determined based on an average thickness of the mine-forming formation, and then a region of the mine-forming formation having a thickness greater than or equal to the threshold value may be delineated as the recessed region; delineating an area of the ore-forming period structure having a thickness less than or equal to one-half of the threshold value as a raised area; the area between the raised and recessed areas is delineated as the sloped area.
Fig. 4 illustrates raised areas 41, recessed areas 42, and sloped areas 43 outlined in some embodiments, in particular fig. 4 is a thickness contour map drawn from the recovered mine-forming stage configuration. As described hereinabove, although the contour map depicts a formation of a formation, its coordinates correspond to the target area, i.e., its data represents the formation of an existing formation in the target area at the formation. As shown in fig. 4, due to the certain continuity of the formation thickness, the sloped region 43 is generally distributed between two raised regions 41 and recessed regions 42, or between two raised regions 41 or two recessed regions 42, i.e., the sloped region 43 is generally distributed around the raised regions 41. It should be noted that portions of the raised areas 41, recessed areas 42, and sloped areas 43 are shown by way of example only, and not by way of all.
In actual operation, one skilled in the art may choose to directly take the average thickness of the ore-forming structure as a threshold, determine the region of the ore-forming structure where the thickness X is greater than the average thickness (X >) as a concave region, the region of less than 1/2 (X </2) as a convex region, and the region between the two (/ 2 < X <) as a sloped region. In some embodiments, the average thickness of the ore formation may be treated by those skilled in the art to be used as a threshold, for example, the average thickness may be comprehensively considered with statistical values such as variance, mean square error, etc. to determine the threshold, so as to better highlight the raised area and the surrounding slope area when the value of the thickness of the ore formation is relatively average.
In some embodiments, the delineating the mine bulge region in the bulge region according to the developmental history of the bulge region may specifically include: determining the time of starting development of the bulge area and the development condition of the bulge area before the ore forming period and in the ore forming period according to the development history of the bulge area; the area of the bulge area meeting the following conditions is determined as a mineral control bulge area: the time to begin development sets after deposition of the mineral bearing layer, prior to the mineral formation phase, is structurally stable in the mineral formation phase and assumes a rising ablation state.
As described above, inversion-obtained ridge development history enables determination of the development condition of the ridge at each year, and according to the development principle of uranium ore, the inventors of the present application determined the ridge that starts development after deposition of the ore-bearing horizon (ore-bearing target layer), has been set before the ore-bearing period, and is stable in structure during the ore-bearing period, and that exhibits a state of ridge ablation as the controlled-ore ridge.
In some embodiments, referring still to fig. 4, a seismic line A-A ' may be disposed in the target area and seismic data at a section where the seismic line A-A ' is located may be acquired, as shown in fig. 4, where the seismic line A-A ' intersects one or more bump areas 41 in the target area, so that the seismic data of the bump areas 41 may be acquired more efficiently, and in some embodiments, if the bump areas 41 are distributed more widely or the area of the bump areas 41 is larger, a plurality of seismic lines may be disposed to perform measurement, which may be selected by those skilled in the art according to the actual situation, and this is not a specific limitation.
In some embodiments, fracture data in the bump may be obtained from the seismic data and the growth history of the bump may be inverted from the fracture data as the growth history of the bump is inverted from the seismic data. While the history of the inversion of the bump area from the profile of a seismic line is shown in fig. 5, it will be appreciated that when the seismic line crosses multiple bump areas, it must pass through some of the dimple areas and ramp areas, and when inversion is performed from the seismic data at the profile of the seismic line, the inversion results actually include the history of the seismic line passing through some of the dimple areas and ramp areas, and analysis software such as 2 dmeve can be used to obtain the above-described fig. 5.
The fracture data may include the spacing, nature, etc. of the fractures, and FIG. 5 shows the post-mine (post-mine overburden) development 51, the onset of mine development 52, the onset of development 53, and the mineral bearing formation development 54, respectively, acquired from the seismic data at the seismic lines A-A' of FIG. 4, wherein the black vertical lines in each graph are fractures, and the specific development of the elevated regions between the time nodes represented by each graph may be analyzed based on changes in fracture morphology.
After the controlled pore region is determined, referring to fig. 6, a uranium ore distribution region 61 may be defined in a slope region around the controlled pore region, which may refer to a slope region immediately adjacent to the controlled pore region, and may be a slope region nearest to the controlled pore region when the controlled pore region is not at the boundary of the elevated region (no immediately adjacent slope region). As described above, the slope region within a certain range around the controlled-ore raised region can be determined as the uranium ore distribution region 61.
In some embodiments, in determining the uranium deposit distribution region, the formation thickness distribution in the slope region around the controlled-ore-rising region may be first determined, and a transition region between a region where the formation thickness is relatively high and a region where the formation thickness is relatively low may be determined as the uranium deposit distribution region. Specifically, in this embodiment, the uranium ore distribution area is determined as a transition area of local convexity and concavity in the slope area, and a person skilled in the art may determine the criterion of these transition areas according to the actual situation, for example, if the thickness difference between the two areas (the area with relatively high formation thickness and the area with relatively low formation thickness) meets a certain condition, then the area between the two areas is determined as the transition area. In some embodiments, the sand distribution in the slope region around the controlled-ore-rising region may be further acquired, and the region in which the sand distribution exists in the transition region is later determined as the uranium ore distribution region. It will be appreciated that sandstone-type uranium ores are formed in sand bodies and, therefore, the accuracy of determining the uranium deposit distribution areas in combination with the sand body distribution is high.
In some embodiments, as described above, the history of development of the elevated regions also includes the development of elevated regions after the ore formation period, which will form a remodelling or overgrowth, altering ore body shape, burial depth, for example, the post-ore formation (post-ore overgrowth) development condition of fig. 5, fig. 51, shows the extended development of the elevated regions after the ore formation period. Based on the method, remodelling data and/or overburden data of the controlled-mine bulge area after the mine period can be analyzed according to the development history of the bulge area; and adjusting the uranium deposit distribution region according to the remodelling data and/or the overaction data. Adjusting the uranium deposit distribution region may include appropriately adjusting a range of the uranium deposit distribution, integrally moving a range of the uranium deposit distribution region, adjusting a depth range of the uranium deposit distribution region, and the like, and may be performed by a person skilled in the art according to the actually determined remodelling data and/or the override data, which will not be described herein.
In the description of the present specification, a particular feature, structure, material, or characteristic described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the various embodiments or examples described in this specification and the features of the various embodiments or examples may be combined by one skilled in the art without contradiction.
Although embodiments of the present application have been shown and described above, it should be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives, and variations may be made to the above embodiments by those skilled in the art within the scope of the application.
Claims (8)
1. A method of determining uranium deposit distribution areas, comprising:
acquiring drilling data, a mineral layer and a mineral formation period of a target area;
recovering an ore formation period structure of the ore-forming horizon according to the drilling data;
defining a raised area, a slope area and a recessed area in the target area according to the thickness of the ore formation period structure;
acquiring seismic data of the bulge area to invert the development history of the bulge area according to the seismic data;
defining a mine-controlling raised region in the raised region according to the development Shi Zaisuo of the raised region;
determining a uranium deposit distribution region in the ramp region around the controlled deposit elevation region;
wherein delineating the mine-controlling raised region in the raised region according to the development Shi Zaisuo of the raised region comprises:
determining the time of starting development of the bulge area and the development condition of the bulge area before the ore forming period and in the ore forming period according to the development history of the bulge area;
determining the area meeting the following conditions in the raised area as a mineral control raised area: shaping after deposition of the mineral bearing layer position and before the mineral forming period, wherein the structure in the mineral forming period is stable and the mineral forming period is in a rising and denuded state;
wherein said determining a uranium deposit distribution region in said ramp region around said controlled deposit elevation region comprises:
determining a formation thickness profile in the sloped region surrounding the controlled elevation region;
determining a transition region between a region with relatively high stratum thickness and a region with relatively low stratum thickness as a uranium ore distribution region;
the determining a uranium deposit distribution region in the ramp region around the controlled deposit elevation region further includes:
acquiring sand body distribution in the slope area around the mine control protrusion area;
determining a region with sand distribution in the transition region as a uranium deposit distribution region;
determining remodelling data and/or overburden data of the controlled mining protuberance zone after a mining period according to the development history of the protuberance zone;
and adjusting the uranium ore distribution area according to the remodelling data and/or the overburden data.
2. The method of claim 1, wherein delineating raised, sloped, and recessed regions according to the thickness of the mine-forming period formation comprises:
determining a threshold value according to the average thickness of the ore formation;
delineating a region of the mine-forming period structure having a thickness greater than or equal to the threshold as the recessed region;
delineating an area of the mine-forming period formation having a thickness less than one-half of the threshold as the elevated area;
areas of the mine-forming period configuration having a thickness less than the threshold and greater than one-half of the threshold are delineated as the sloped region.
3. The method of claim 1, wherein the acquiring seismic data for the bump area comprises:
and setting a seismic line in the target area, and acquiring seismic data at a section where the seismic line is located, wherein the seismic line transversely cuts one or more raised areas in the target area.
4. The method of claim 3, wherein the inverting the developmental history of the mound zone from the seismic data comprises:
acquiring fracture data in the bulge area according to the seismic data;
inverting the development history of the elevated region based on the fracture data.
5. The method of claim 1, wherein recovering a mineral formation of the mineralized horizon from the borehole data comprises:
determining the recovery thickness and/or the recovery burial depth of the mining horizon by using a compaction correction formula according to the drilling data;
obtaining the erosion amount of the mineral-forming horizon;
and determining the ore formation period structure of the mining horizon according to the recovery thickness and/or recovery burial depth and the ablation amount.
6. The method of claim 5, wherein the obtaining the erosion amount of the mineralized horizon comprises:
determining an ablation zone from the seismic data or borehole data of the target zone;
based on the borehole data of the ablation zone, an amount of ablation in the ablation zone is determined using a sonic jet lag method.
7. The method of claim 6, wherein determining an ablation zone from the seismic data of the target zone comprises:
determining a cutting point in each seismic section according to the seismic data;
and determining a closed area formed by connecting the cutting points in the seismic sections on a plane as the ablation area.
8. The method of claim 6, wherein determining an ablation zone from borehole data for the target zone comprises:
acquiring a mineral-forming layer position at each drilling position and development data of a stratum covered by the mineral-forming layer position according to the drilling data;
and determining the denudation area according to the development data of the prospecting layer and the formation overlying the prospecting layer.
Priority Applications (1)
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