Strip-shaped iron building modeling iron ore deep prospecting method, system and equipment

Abstract

The invention discloses a strip-shaped iron building modeling iron ore deep prospecting method, system and equipment, and relates to the technical field of mineral products, and the method comprises the following steps: obtaining geological data of a research mining area; according to the geological data, determining the mineralization law of the strip-shaped iron building modeling iron ore in the research mining area; determining a target prospecting area in the research mining area based on the metallogenic law; performing aeromagnetic measurement and gravity measurement in the target prospecting area to obtain magnetic measurement data and gravity data; according to the magnetic measurement data and the gravity data, on the basis of the metallogenic law, determining gravity and magnetic homologous body distribution data in a target prospecting area; and directional drilling is conducted in the target prospecting area according to the gravity and magnetic homologous body distribution data, so that strip-shaped iron building modeling iron ore is explored in the research mining area. According to the method, technologies such as mineralization law summarization, aeromagnetic measurement, gravity measurement and directional drilling are combined for prospecting, and the efficiency of exploration work and the success rate of prospecting are improved.

Description

Technical Field

[0001] The present application relates to the field of mineral technology, and in particular to a method, system and equipment for deep prospecting of banded iron ore. Background Art

[0002] Banded Iron Formation (BIF) iron deposits were formed in the Cambrian greenstone belt, mainly in the Archean, and are located in a greenstone belt composed of metamorphic volcanic rocks and sedimentary rocks. Therefore, the deposits have obvious temporal and spatial distribution patterns and ore-bearing rock combination patterns. The iron ore bodies are strictly controlled by metamorphic strata, and the biotite hornblende schist and magnetite hornblende quartzite development intervals are favorable locations for mineralization. Due to the great burial depth of the deposits, weak surface information, and great difficulty in prospecting, it is necessary to effectively locate the BIF iron ore to solve the problem of the constraints of traditional mineral exploration technology. Summary of the invention

[0003] The purpose of this application is to provide a method, system and equipment for deep prospecting of banded iron ore, which can improve the efficiency of exploration work and the success rate of prospecting.

[0004] To achieve the above objectives, this application provides the following solutions: In a first aspect, the present application provides a method for deep prospecting of banded iron ore, comprising: Obtain geological data on the research mining area; Determine the metallogenic law of banded iron formation type iron ore in the research mining area based on the geological data; Determine the target prospecting area within the research mining area based on the mineralization law; Conducting aeromagnetic survey and gravity survey in the target prospecting area to obtain magnetic survey data and gravity data; According to the magnetic survey data and the gravity data, based on the metallogenic law, determine the distribution data of gravity and magnetic homologous bodies in the target prospecting area; Based on the gravity and magnetic homologue distribution data, directional drilling is carried out in the target prospecting area to explore banded iron ore in the research mining area.

[0005] In a second aspect, the present application provides a banded iron structure type iron ore deep prospecting system, comprising: The geological data acquisition module is used to obtain geological data of the research mining area; A metallogenic law determination module is used to determine the metallogenic law of banded iron ore in the research mining area based on the geological data; A target area determination module is used to determine a target prospecting area within the research mining area based on the mineralization law; A gravity and magnetic measurement module is used to perform aeromagnetic measurement and gravity measurement in the target prospecting area to obtain magnetic measurement data and gravity data; A homologous body determination module is used to determine the distribution data of gravity and magnetic homologous bodies in the target prospecting area based on the magnetic survey data and the gravity data and the mineralization law; The directional drilling module is used to carry out directional drilling in the target prospecting area according to the distribution data of the gravity and magnetic homologues, so as to explore the banded iron ore in the research mining area.

[0006] In a third aspect, the present application provides a computer device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the above-mentioned method for deep prospecting of banded iron ore.

[0007] According to the specific embodiments provided in this application, this application has the following technical effects: The present application provides a method, system and equipment for deep prospecting of banded iron ore structures. By analyzing and studying the metallogenic laws of banded iron ore structures in the mining area and combining gravity and magnetic joint inversion interpretation, the scope of prospecting is narrowed, the gravity and magnetic homologs are accurately delineated, the layout of drilling projects is guided, and the efficiency of exploration work and the success rate of prospecting are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0009] Figure 1 A schematic diagram of a process flow of a method for deep prospecting of banded iron ore structures provided in one embodiment of the present application.

[0010] Figure 2 A technical roadmap for a method for deep prospecting of banded iron ore structures is provided in accordance with one embodiment of the present application.

[0011] Figure 3 This is an aeromagnetic ΔT contour line plane diagram generated in one embodiment of the present application.

[0012] Figure 4 This is a plan view of the Bouguer gravity anomaly generated in one embodiment of the present application.

[0013] Figure 5 This is a residual gravity anomaly plan view generated in one embodiment of the present application.

[0014] Figure 6 This is a planar distribution diagram of gravity and magnetic isologous bodies generated in one embodiment of the present application.

[0015] Figure 7 This is a cross-section diagram of the gravity and magnetic forward geological model generated in one embodiment of the present application.

[0016] Figure 8 This is the geological and geophysical comprehensive profile of the 8th exploration line generated in one embodiment of the present application.

[0017] Fig. 9 This is a simplified geological profile of the 8th exploration line generated in one embodiment of the present application.

[0018] Fig.10 A schematic diagram of the functional modules of a banded iron structure type iron ore deep prospecting system provided in one embodiment of the present application. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0020] BIF type iron ore has obvious magnetic anomaly characteristics, and the overall physical properties are "strong magnetism, high density, low resistance, and high polarization". Generally speaking, this type of iron ore has certain gravity anomalies. By effectively extracting the residual gravity anomaly characteristics, the distribution state of the iron ore can be located, thereby achieving the purpose of guiding prospecting. In view of the characteristics of BIF type iron ore with deep burial depth and steep inclination, the screw drill tool inclination technology is used to cooperate with the directional instrument to control the direction of the wellbore axis, which can solve the problem of difficult control of the inclination of small-diameter boreholes in the deep part.

[0021] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0022] In an exemplary embodiment, Figure 1 and Figure 2 As shown, a method for deep prospecting of banded iron ore is provided, comprising the following steps 101 to 106.

[0023] Step 101, obtaining geological data of the research mining area.

[0024] In a specific application example, the geological data includes geological information, geophysical information, geochemical information, remote sensing information, mineral exploration information, scientific research information, etc. Among them, geological information includes natural geography, topography and geological conditions.

[0025] Step 102, determining the metallogenic law of banded iron formation type iron ore in the research mining area based on the geological data.

[0026] In a specific application example, the distribution of the ore-bearing strata in the region and the transformation of the ore-bearing strata by the later tectonic movement are comprehensively analyzed based on geological data, and the mineralization law of the research area is comprehensively studied. The existing geological data and previous research results in the research mining area are summarized and analyzed, the mineralization geological background characteristics of the research mining area are mastered, and the strata, magmatic rocks and regional structural characteristics in the research mining area are analyzed in detail. The mineralization laws of the research mining area are summarized and studied, providing a theoretical basis for the layout of geophysical survey work.

[0027] The mineralization laws include the laws of temporal and spatial distribution, stratigraphic control, mineral-bearing rock combination, structural control and geophysical anomaly.

[0028] 1) Temporal and spatial distribution law: BIF type iron ore is controlled by Neoarchean volcanic sedimentary strata, mainly in the metamorphic basement of Neoarchean Taishan Group and Jining Group. The zircon Rb-Sr isochron age of the ore-bearing strata is 2512Ma, and the mineralization age is Neoarchean. This set of strata is deeply metamorphic, with a relatively simple lithology, mainly gneiss and metamorphic granulite, and locally amphibolite and layered or lenticular magnetite quartzite.

[0029] 2) Ore-bearing rock combination rules: The ore-bearing strata have clear ore-bearing rock series, mainly (biotite) hornblende granulite, amphibolite, hornblende schist and magnetite quartzite. The ore-bearing structures are mainly banded magnetite quartzite, magnetite hornblende and hornblende magnetite quartzite.

[0030] 3) Structural control law: Ore body output is controlled by fold structure and fault structure. Fold structure is formed by strong compression of metamorphic rock series. They are mineralization structures after mineralization, which play a major role in controlling the occurrence form and distribution law of iron ore and have a significant control effect on the enrichment of iron ore; fault structure is a destructive structure after mineralization, which destroys the continuity of mineralization structure and ore body and indirectly controls the occurrence and distribution of iron ore body.

[0031] 4) Geophysical anomaly law: BIF type iron ore usually has a banded distribution feature. As for the iron ore deposit itself, its ores are mostly quartz magnetite, hornblende quartz magnetite and diopside quartz magnetite. The iron ore is more magnetic than its surrounding rock and has a larger density. The stronger the mineralization, the stronger the magnetism and the heavier the ore. Within the distribution range of the iron ore body, the magnetic anomaly intensity can reach 3000nT~6000nT. The magnetic anomaly characteristics are highly consistent with the iron ore body and can directly reflect the characteristics of the ore-bearing belt or ore body. Therefore, magnetic measurement and gravity measurement are important exploration methods for this type of iron ore.

[0032] Step 103, determining the target prospecting area within the research mining area based on the mineralization law.

[0033] In the subsequent steps 104 and 105 of the present application, the difference patterns of the magnetic characteristics of the ore body and the surrounding rock are first analyzed based on the physical property parameters of the rocks and ores to determine the difference patterns of the physical property characteristics. Then, based on the difference patterns of the physical property characteristics, drone aeromagnetic and gravity measurements are carried out in the target prospecting area, and the gravity and magnetic anomaly data are jointly compared and analyzed to infer the distribution of deep gravity and magnetic isologous bodies and guide the layout of prospecting projects.

[0034] The process of determining the law of physical property characteristic differences is as follows: collecting physical property parameter data of the target prospecting area and surrounding rocks and ores, collecting physical property analysis samples of various lithologies in the target prospecting area, and conducting statistical analysis on the collected and measured physical property parameters of rocks and ores, as shown in Tables 1 and 2.

[0035]

[0036] As shown in Table 1, the strong magnetic magnetite has strong magnetic induction and remanence, and the magnetic susceptibility κ varies in the range of 3000~20000 (10 -6 4πSI), the range of residual magnetic intensity Mr is 1000~15000 (10 -3 Therefore, when the iron ore body reaches a certain scale, it can cause strong local magnetic anomalies.

[0037]

[0038] As can be seen from Table 2, there are obvious differences in rock density between the Quaternary and its underlying rocks. The density of each rock layer (rock) can be divided into three categories: high, medium and low. The low-density rock layer is the Cenozoic, and its average density is less than 2.4kg / cm 3 Medium-density rocks (layers) are Mesozoic, Paleozoic, Proterozoic-Archean metamorphic rocks, and most intrusive rocks. Their average density is generally 2.6 kg / cm 3 ~2.8kg / cm 3; High-density rocks are magnetite quartzite and magnetite schist, and their average density is generally 3.4kg / cm 3 ~3.5kg / cm 3 , which has a large difference in density from other rocks and is prone to form obvious gravity anomalies.

[0039] Step 104, performing aeromagnetic survey and gravity survey in the target prospecting area to obtain magnetic survey data and gravity data.

[0040] In a specific application example, step 104 includes the following steps 41 and 42 .

[0041] Step 41, using a drone equipped with an aeromagnetic measurement system to perform aeromagnetic measurement in the target prospecting area to obtain magnetic measurement data.

[0042] Specifically, the drone is equipped with a GTK-R25E rubidium optical pump aeromagnetic measurement system for aeromagnetic measurement, which can eliminate the influence of dense interference from ground structures on ground magnetic measurement and obtain high-quality magnetic measurement data. Among them, the 1:25,000 drone aeromagnetic measurement point grid is arranged at 250m×50m, the survey line azimuth is 80°, the flight mode is terrain-simulating flight, the flight altitude is 100m, and it is adjusted according to the actual situation of the work area.

[0043] The data of the aeromagnetic measurement system is collected and recorded by the GSMP-25U (B) magnetometer. The original data includes time, total field value, position, attitude and other measurement data, which are transmitted to the computer through the wireless network and recorded in the form of files.

[0044] Step 42, using a relative gravity measurement method to establish a survey area base point joint measurement network in the target prospecting area, and using a gravimeter to measure gravity data in the target prospecting area.

[0045] Specifically, the relative gravity measurement method is adopted to establish a joint measurement network of base points in the survey area based on the gravity base point closest to the target prospecting area. The 1:25,000 gravity measurement network is arranged at 500m×250m, and the survey line orientation is 80°. According to the geographical location and traffic conditions of the target prospecting area, independent base points are set up, and joint measurement is carried out in a two-way round-trip observation mode. The observation of the measuring point starts and ends at the base point, and the "base-auxiliary-base" observation is carried out on the base point. The base point is read three times, with an interval of about 5 minutes. The difference between the two average readings before and after the base point does not exceed 0.010×10 -5 m / s 2 The closing time of the base point is strictly controlled according to the closing time determined by the dynamic test. Each measuring point is read twice, and the difference between the two adjacent readings is no more than 0.005×10 -5 m / s 2 The total accuracy of the Bouguer gravity anomaly is ±0.100×10 -5m / s 2 .

[0046] Step 105, according to the magnetic survey data and the gravity data, based on the mineralization law, determine the distribution data of gravity and magnetic isologous bodies in the target prospecting area.

[0047] In a specific application example, step 105 includes the following steps 51 to 53.

[0048] Step 51, determining the distribution data of magnetic geological bodies in the target prospecting area based on the magnetic survey data.

[0049] Specifically, the magnetic survey data is subjected to low-pass filtering and upward extension processing, and low-frequency magnetic anomalies generated by deep source structures and geological bodies are separated from the magnetic survey data. The low-frequency magnetic anomalies are magnetic anomalies with frequencies lower than a set threshold. The magnetic geological body distribution data is determined based on the low-frequency magnetic anomalies. The magnetic geological body distribution data includes the buried depth, distribution range, spatial distribution characteristics and main occurrence elements of the magnetic geological body.

[0050] By low-pass filtering and upward extension of the magnetic survey data, the high-frequency magnetic anomaly interference caused by shallow source materials and surface objects in the target prospecting area is suppressed, and the low-frequency magnetic anomalies caused by deep source structures and geological bodies are separated. The low-frequency magnetic anomalies are further processed using data such as magnetic △T polarization, upper and lower extension, magnetic vertical second-order number, magnetization intensity, and second-order derivative of magnetization intensity to lock in the burial depth, distribution range, spatial distribution characteristics and main occurrence elements of the magnetic geological body.

[0051] In this application, if Figure 3 As shown in the figure, the aeromagnetic △T contour line map is generated based on the magnetic survey data. Combined with the geological data, a local magnetic anomaly belt is enclosed by a 1200nT contour line. The long axis direction of the anomaly belt is NNE, the length of the anomaly belt is about 15km, and the width is about 8km. The magnetic anomaly morphology is regular, the curve is smooth, the anomaly intensity is high, the gradient of change is large, and there is an obvious negative magnetic anomaly on the north side, which has obvious mineral-induced anomaly characteristics. The positive magnetic anomaly area is composed of two anomalies in the south and north. The peak value of the magnetic anomaly in the south is 2900nT, and the peak value of the magnetic anomaly in the north is 3800nT. The north side of the positive anomaly area is accompanied by a negative magnetic anomaly caused by oblique magnetization. The ratio of the positive and negative amplitudes of the magnetic anomaly is relatively small, and the horizontal gradient between the positive and negative anomalies is relatively gentle. It is inferred that the deep magnetic geological body is generally distributed in a NNE belt in the same direction as the long axis of the anomaly. The gradient of change on the east side of the anomaly peak is large, and it is inferred that the mineral belt generally tends to the west.

[0052] Step 52, determining the high-density geological body distribution data in the target prospecting area based on the gravity data.

[0053] Specifically, the residual gravity anomaly is calculated based on the gravity data and the regional gravity field of the target prospecting area. The gravity data is processed with latitude, altitude, Bouguer and terrain correction, and then subtracted from the regional gravity field to calculate the residual gravity anomaly. Based on the residual gravity anomaly, the high-density geological body distribution data is determined. The high-density geological body distribution data includes the burial depth, distribution range and spatial distribution characteristics of the high-density geological body.

[0054] like Figure 4 As shown in the figure, a Bouguer gravity anomaly plane map is generated based on the gravity data. The Bouguer gravity anomaly is characterized by a gravity high with the main body in the north-northwest direction in the negative background, and the negative anomaly extends in the northeast direction. The positive and negative anomalies generally form a comma-shaped anomaly shape. The gravity amplitude is 5×10 -5 ~7×10 -5 m / s 2 .

[0055] like Figure 5 As shown in the figure, the residual gravity anomaly has a similar shape to the Bouguer gravity anomaly, and is generally manifested as the superposition of northeast and northwest gravity anomalies. It is inferred that the deep northwest-trending high-density geological body has been dislocated and twisted due to the later northwest-trending tectonic movement.

[0056] Step 53, according to the magnetic geological body distribution data and the high-density geological body distribution data, based on the mineralization law, determine the gravity and magnetic homologous body distribution data in the target prospecting area.

[0057] Specifically, the magnetic geological body distribution data and the high-density geological body distribution data are matched and compared, and combined with the mineralization law, the gravity and magnetic homologous body distribution data are determined. The gravity and magnetic homologous body distribution data includes the distribution area and preliminary morphology of the gravity and magnetic homologous body. The matching and comparison is to superimpose the two data and take the overlapping area.

[0058] By comparison Figure 3 and Figure 5 It is found that the range of positive aeromagnetic anomaly and residual gravity anomaly is roughly the same, the location of the anomaly area is roughly consistent, and the main peak position is very close. However, there are some differences in their shapes: the southwestern part of the magnetic anomaly is bulging and slightly shifting to the northwest, while the northeastern part of the gravity anomaly is bulging and slightly shifting to the southeast, and the width of the anomaly belt is slightly different.

[0059] like Figure 6 and Figure 7As shown in the figure, by matching and comparing the gravity and magnetic anomalies, the plane distribution map and cross-sectional map of gravity and magnetic homologous bodies are compiled. The magnetic geological body is actually offset to the side of the negative magnetic anomaly, and the offset is roughly equivalent to the burial depth, which is mainly caused by oblique magnetization. The high-density geological body is a flat "gourd-shaped" body, and the expanded body on the northeast side is the main body of the high-density body. Compared with the two geological bodies, the extra part of the southwestern end of the magnetic geological body is biased to the north; the extra part of the northeastern end of the high-density geological body is biased to the east, which is mainly caused by the uneven density distribution in the shallow layer. The gravity and magnetic homologous area is a distribution area of ​​high-density and strong magnetic geological bodies, and it is also an area where iron ore bodies are stored. It is an important target area for iron ore prospecting and prediction.

[0060] The metamorphic basement of the Neoarchean Jining Group in the target prospecting area is covered by the Paleozoic and Cenozoic strata at a depth of 1,000 meters. The overall occurrence of the metamorphic basement is stable, with a general stratum strike of 330° to 360°, a westward inclination, and a general dip angle of 54° to 70°. According to the temporal and spatial distribution law of BIF-type iron ore, it is inferred that the occurrence of the ore body is consistent with that of the ore-bearing stratum.

[0061] like Figure 8 As shown, the 8th exploration line section in the gravity and magnetic homology area was further selected in the east-west direction. According to the Bouguer gravity anomaly curve, residual gravity anomaly curve, vertical magnetic anomaly curve, and vertical magnetic vertical second-order derivative curve on the section, combined with the stratigraphic geological conditions of the gravity and magnetic homology area, it is inferred that the gravity and magnetic homology body of the section is always a monocline layer with a steep dip of 60°~70° and a top buried depth of about 1000m. Drilling holes were constructed on the west side of the gravity and magnetic anomaly peak to verify its mineralization. Figure 8 In the equation, P stands for Permian, Q stands for Quaternary, C stands for Carboniferous, and O stands for Ordovician. Represents the Cambrian system.

[0062] Step 106, based on the gravity and magnetic homologue distribution data, directional drilling is performed in the target prospecting area to explore banded iron ore in the research mining area.

[0063] In a specific application example, when directional drilling is performed in the target prospecting area, the screw drill directional drilling technology is used to control the drilling trajectory.

[0064] Directional drilling projects arranged in accordance with the project spacing system are carried out to verify and reveal the specific distribution of the iron ore body on the profile, such as Fig. 9 As shown. BIF type iron ore has the characteristics of deep burial depth and steep inclination. The upper cap rock composed of mudstone, siltstone, shale and limestone is a strong inclined rock layer, and the borehole is prone to severe bending. According to the characteristics of this stratum structure, the screw drill directional drilling (deflection correction) technology is used to achieve precise control of the borehole trajectory and ensure that the borehole hits the target accurately. This screw drill directional drilling and drilling correction method greatly improves the exploration accuracy of deep hole directional drilling, shortens the exploration cycle, and improves the high-quality porosity.

[0065] Among them, the screw drill directional drilling technology uses an inclined drilling tool combination: Φ55mm rope coring drill rod + Φ60mm directional joint + Φ60mm screw drill tool + 0.5° bent outer tube + Φ73mm water diversion joint + Φ75mm inclined drill bit. The specific process is: lower the inclined drilling tool into the bottom of the hole, then lower the directional instrument from the hollow drill rod, measure the actual installation angle of the inclined tool, and then rotate the drill rod until it matches the set installation angle, mark the active drill rod, and keep the fixed direction each time the drill rod is added. During the inclined drilling, the curvature of the borehole is measured every 10m, and the installation angle and the degree of the bent outer tube in the drill tool combination are appropriately adjusted according to the measured inclination results.

[0066] In an exemplary embodiment, the above step 106 is repeated on multiple profiles, and drilling is performed to verify the ore body. During the drilling construction process, full consideration is given to the transformation and destructive effects of fold structures and fault structures on the ore body, especially the fault structure that destroys the ore-bearing structure and the continuity of the ore body, thereby achieving systematic control of the ore body of the ore deposit.

[0067] This application is based on the exploration technology of deep mineral exploration technology combination such as summary of mineralization laws, drone aeromagnetic measurement, gravity measurement, directional drilling verification, etc., and summarizes and refines a set of applicable, efficient and complete exploration technology system. According to the combined inversion interpretation of gravity and magnetism and the mineralization laws, the exploration scope is narrowed, the gravity and magnetic homologs are delineated, and the layout of drilling projects is guided. The drilling construction adopts screw drill directional drilling (correction) technology to achieve precise control of the drilling trajectory and ensure that the drilling accurately hits the target, which improves the efficiency of the exploration work and the success rate of mineral exploration and shortens the exploration cycle. It has the characteristics of wide coverage, high effectiveness and strong applicability, and effectively makes up for the shortcomings of traditional iron ore exploration technology such as unclear extension status of iron-containing structures, large deep control errors, and great destructive power to the ecological environment.

[0068] Based on the same inventive concept, the embodiment of the present application also provides a banded iron structure type iron ore deep prospecting system for implementing the banded iron structure type iron ore deep prospecting method involved above. The implementation scheme for solving the problem provided by the system is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more banded iron structure type iron ore deep prospecting system embodiments provided below can refer to the limitations of the banded iron structure type iron ore deep prospecting method above, and will not be repeated here.

[0069] In an exemplary embodiment, Fig.10 As shown, a deep prospecting system for banded iron ore is provided, comprising: a geological data acquisition module 201, a mineralization law determination module 202, a target area determination module 203, a gravity and magnetic measurement module 204, a homologous body determination module 205 and a directional drilling module 206.

[0070] The geological data acquisition module 201 is used to acquire geological data of the research mining area.

[0071] The metallogenic law determination module 202 is used to determine the metallogenic law of banded iron ore in the research mining area according to the geological data.

[0072] The target area determination module 203 is used to determine the target prospecting area within the research mining area based on the mineralization law.

[0073] The gravity and magnetic measurement module 204 is used to perform aeromagnetic measurement and gravity measurement in the target prospecting area to obtain magnetic measurement data and gravity data.

[0074] The homologous body determination module 205 is used to determine the distribution data of gravity and magnetic homologous bodies in the target prospecting area based on the magnetic survey data and the gravity data and the mineralization law.

[0075] The directional drilling module 206 is used to perform directional drilling in the target prospecting area according to the gravity and magnetic homologue distribution data, so as to explore the banded iron formation type iron ore in the research mining area.

[0076] In an exemplary embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps in the above-mentioned method embodiments when executing the computer program.

[0077] In an exemplary embodiment, a computer-readable storage medium is provided, storing a computer program, and when the computer program is executed by a processor, the steps in the above method embodiments are implemented.

[0078] In an exemplary embodiment, a computer program product is provided, including a computer program, and when the computer program is executed by a processor, the steps in the above method embodiments are implemented.

[0079] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0080] In this application, all actions to obtain signals, information or data are carried out in compliance with the relevant data protection laws and policies of the country where they are located and with the authorization given by the owner of the corresponding device.

[0081] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM may be in various forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM).

[0082] The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. The non-relational database may include a distributed database based on blockchain, etc., but is not limited thereto. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but is not limited thereto.

[0083] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0084] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core ideas of this application. At the same time, for those skilled in the art, according to the ideas of this application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. A method for deep prospecting of banded iron ore, characterized in that: The deep prospecting method for banded iron ore includes: Obtain geological data on the research mining area; Determine the metallogenic law of banded iron formation type iron ore in the research mining area based on the geological data; Determine the target prospecting area within the research mining area based on the mineralization law; Conducting aeromagnetic survey and gravity survey in the target prospecting area to obtain magnetic survey data and gravity data; According to the magnetic survey data and the gravity data, based on the metallogenic law, determine the distribution data of gravity and magnetic homologous bodies in the target prospecting area; Based on the gravity and magnetic homologue distribution data, directional drilling is carried out in the target prospecting area to explore banded iron ore in the research mining area.

2. The deep prospecting method for banded iron ore according to claim 1, characterized in that: The geological data include geological information, geophysical information, geochemical information, remote sensing information, mineral exploration information and scientific research information; the mineralization laws include temporal and spatial distribution laws, stratigraphic control laws, mineral-bearing rock combination laws, structural control laws and geophysical anomaly laws.

3. The deep prospecting method for banded iron ore according to claim 1, characterized in that: Conduct aeromagnetic and gravity surveys in the target prospecting area to obtain magnetic and gravity data, including: Use a drone equipped with an aeromagnetic measurement system to conduct aeromagnetic measurement in the target prospecting area to obtain magnetic survey data; A relative gravity measurement method is used to establish a survey area base point joint measurement network in the target prospecting area, and a gravimeter is used to measure the gravity data in the target prospecting area.

4. The deep prospecting method for banded iron ore according to claim 1, characterized in that: According to the magnetic survey data and the gravity data, based on the metallogenic law, the distribution data of gravity and magnetic homologous bodies in the target prospecting area are determined, specifically including: Determine the distribution data of magnetic geological bodies in the target prospecting area according to the magnetic survey data; Determine the distribution data of high-density geological bodies in the target prospecting area based on the gravity data; According to the magnetic geological body distribution data and the high-density geological body distribution data, based on the mineralization law, the gravity and magnetic homologous body distribution data in the target prospecting area are determined.

5. The deep prospecting method for banded iron ore according to claim 4, characterized in that: According to the magnetic survey data, the distribution data of magnetic geological bodies in the target prospecting area is determined, specifically including: The magnetic survey data are subjected to low-pass filtering and upward extension processing to separate low-frequency magnetic anomalies generated by deep-source structures and geological bodies from the magnetic survey data; the low-frequency magnetic anomalies are magnetic anomalies with a frequency lower than a set threshold; The magnetic geological body distribution data is determined according to the low-frequency magnetic anomaly; the magnetic geological body distribution data includes the buried depth, distribution range, spatial distribution characteristics and main occurrence elements of the magnetic geological body.

6. The deep prospecting method for banded iron ore according to claim 4, characterized in that: According to the gravity data, the high-density geological body distribution data in the target prospecting area is determined, specifically including: Calculating residual gravity anomalies based on the gravity data and the regional gravity field of the target prospecting area; According to the residual gravity anomaly, high-density geological body distribution data are determined; the high-density geological body distribution data include the burial depth, distribution range and spatial distribution characteristics of the high-density geological body.

7. The deep prospecting method for banded iron ore according to claim 4, characterized in that: According to the magnetic geological body distribution data and the high-density geological body distribution data, based on the metallogenic law, the distribution data of gravity and magnetic homologous bodies in the target prospecting area are determined, specifically including: The magnetic geological body distribution data and the high-density geological body distribution data are matched and compared, and combined with the mineralization law, the gravity and magnetic isologous body distribution data are determined; the gravity and magnetic isologous body distribution data includes the distribution area and preliminary morphology of the gravity and magnetic isologous body.

8. The deep prospecting method for banded iron ore according to claim 1, characterized in that: When directional drilling is carried out in the target prospecting area, the screw drill directional drilling technology is used to control the drilling trajectory.

9. A banded iron structure type iron ore deep prospecting system, applied to the banded iron structure type iron ore deep prospecting method according to any one of claims 1 to 8, characterized in that: The banded iron structure type iron ore deep prospecting system comprises: The geological data acquisition module is used to obtain geological data of the research mining area; A metallogenic law determination module is used to determine the metallogenic law of banded iron ore in the research mining area based on the geological data; A target area determination module is used to determine a target prospecting area within the research mining area based on the mineralization law; A gravity and magnetic measurement module is used to perform aeromagnetic measurement and gravity measurement in the target prospecting area to obtain magnetic measurement data and gravity data; A homologous body determination module is used to determine the distribution data of gravity and magnetic homologous bodies in the target prospecting area based on the magnetic survey data and the gravity data and the mineralization law; The directional drilling module is used to carry out directional drilling in the target prospecting area according to the distribution data of the gravity and magnetic homologues, so as to explore the banded iron ore in the research mining area.

10. A computer device comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method for deep prospecting of banded iron ore of a structured iron ore according to any one of claims 1 to 8.

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