A method for detecting hidden rich manganese carbonate ore

Abstract

The present application relates to the field of mineral resource exploration, and in particular to a method for detecting hidden manganese carbonate-rich ore, including: using remote sensing technology to delineate the surface manganese-containing strata; conducting ground tracing in the area where the manganese-containing strata are located to determine the manganese-rich ore section; using induced polarization mid-ladder technology to determine the location of the manganese carbonate-rich ore body hidden in the manganese-rich ore section; using well-ground induced polarization technology to trace the extension range information of the manganese carbonate-rich ore body. The present application provides geologists with a detection method that improves exploration efficiency and safety, thereby helping to reduce the length of time geologists work in harsh environments and improve the work safety of geologists. It helps to provide a practical method for in-depth search for hidden manganese carbonate-rich ore bodies, and provides a basis for subsequent comprehensive drilling deployment.

Description

Technical Field

[0001] The present application relates to the field of mineral resource exploration, and in particular to a method for detecting concealed rich manganese carbonate ore. Background Art

[0002] Surface minerals refer to minerals distributed on the surface of the earth, or generated underground and moved to the surface with the movement of the earth. Mineral resources are an important material basis for economic and social development. Among them, manganese ore plays an important role in metallurgy, chemical industry and various production fields of human beings, mainly in the form of manganese carbonate ore and manganese oxide ore.

[0003] Since my country's manganese carbonate mines are mainly small and medium-sized, with more poor mines and fewer rich mines, high-quality rich manganese carbonate mines have always been a hot spot for geological exploration and research in my country. With the continuous consumption of mineral resources by human society, the probability of surface mines being discovered is getting smaller and smaller. People's trend in finding mineral resources has shifted from finding surface mines to finding hidden mines. Compared with surface mines, the mineralization information related to hidden mines is difficult to obtain, which brings difficulties to finding minerals. In order to meet the needs of my country's economic construction for mineral resources, there is an increasing demand for geological surveys and mineral censuses in domestic areas. After decades of exploration and investigation and evidence collection, geologists have gradually obtained several areas where rich manganese carbonate mines may exist. For example, geologists carried out manganese ore exploration in the manganese ore-bearing area of ​​the Malkansu area in the West Kunlun Mountains. After a systematic investigation and study of the strata, rocks and related structures, a preliminary prediction was made for the favorable areas for prospecting.

[0004] The above-mentioned related technologies have certain limitations due to technical limitations, that is, they can only make a rough prediction of the direction of the manganese ore-bearing area, and cannot effectively explore the specific location and extension range of the hidden manganese carbonate-rich ore body. Therefore, the exploration efficiency of hidden mines needs to be improved. Summary of the invention

[0005] The purpose of this application is to provide geologists with a method for improving exploration efficiency and safety, and for effectively obtaining the extended range of the target of hidden manganese carbonate-rich ore bodies. The above invention purpose is achieved through the following technical solutions:

[0006] A method for detecting concealed rich manganese carbonate ore, comprising:

[0007] Remote sensing technology is used to delineate surface manganese-bearing strata;

[0008] Conducting surface tracing in the area where the manganese-bearing formation is located to determine the manganese-rich ore zone;

[0009] Using induced polarization mid-elevation technology to determine the location of the hidden manganese carbonate-rich ore body in the manganese-rich ore section;

[0010] The underground induced polarization technology is used to trace the extension range of the manganese carbonate-rich ore body.

[0011] By adopting the above scheme, the present application uses remote sensing technology to implement non-contact preliminary exploration in a preset work area to delineate the manganese-bearing strata on the surface. Then, the manganese-rich ore section is further determined in the manganese-bearing strata by ground tracing. Then, the identification information related to the manganese ore body is explored through the induced polarization ladder technology to determine the location of the hidden manganese carbonate-rich ore body. Then, the well-ground induced polarization technology is used to trace the extension of the manganese ore body at the location of the manganese carbonate-rich ore body, which helps to know the coverage of the manganese ore body. The present application provides geologists with a detection method that improves exploration efficiency and safety, provides a practical method for in-depth search of the specific location and expansion range of the hidden manganese carbonate-rich ore body, and provides a basis for subsequent comprehensive drilling deployment.

[0012] Furthermore, the specific steps of using remote sensing technology to delineate the surface manganese-containing strata include:

[0013] Using satellites as data information sources, obtain remote sensing images of the work area;

[0014] Processing and enhancing the remote sensing image;

[0015] When it is identified that the remote sensing image contains surface information and alteration information related to manganese-containing ore, the corresponding manganese-containing stratum is determined.

[0016] By adopting the above scheme, the present application uses satellite remote sensing to obtain remote sensing images, and after processing and enhancing the remote sensing images, the surface information and alteration information in the remote sensing images are identified by computer. When the above information is related to manganese-containing ore, it is convenient to determine the scope of the manganese-containing strata based on the above identification results, and then determine the location of the manganese-rich ore section by ground tracing, which can narrow the operation scope for subsequent geophysical exploration and improve efficiency.

[0017] Furthermore, the ground tracing method includes adopting route geological survey or profile survey.

[0018] By adopting the above scheme, the diversity of ground pursuit implementation methods can be increased, which helps to ensure that ground pursuit can be effectively implemented.

[0019] Furthermore, before the use of the induced polarization ladder technology to determine the location of the hidden manganese carbonate-rich ore body in the manganese-rich ore section, the following steps are also included: using wide-area electromagnetic technology to obtain the depth extension and occurrence of the stratum containing the manganese-rich ore section.

[0020] By adopting the above scheme, wide-area induced polarization technology helps to collect the depth extension and occurrence of manganese-rich ore sections in manganese-bearing strata, which is used to further narrow the exploration scope.

[0021] Furthermore, the preparation steps before using the IP mid-elevator technology include:

[0022] Set up an induced polarization medium ladder transmitter and an induced polarization medium ladder receiver;

[0023] Performing performance verification on the IP medium ladder transmitter and the IP medium ladder receiver;

[0024] Determine the operating parameters for implementing the IP ladder.

[0025] By adopting the above scheme, the above preparation steps help to ensure that the data obtained subsequently is accurate and reliable and help to reduce errors.

[0026] Furthermore, the specific steps of using the induced polarization ladder technology to determine the location of the hidden manganese carbonate-rich ore body in the manganese-rich ore section include:

[0027] Multiple groups of electrodes are arranged at intervals in the manganese-rich ore section to conduct electricity;

[0028] Using an observation instrument to detect data on the electrode after power is supplied, and obtaining an apparent polarizability;

[0029] Based on the apparent resistivity calculation model, the apparent resistivity is calculated;

[0030] Information on the location of the manganese carbonate-rich ore body is obtained based on the apparent polarizability and the apparent resistivity.

[0031] By adopting the above scheme, the above method steps obtain the apparent polarizability through multiple sets of set measurements combined with data detection, and obtain the apparent resistivity in combination with model calculation, so that the information about the ladder in the induced polarization is more objective, which helps to prevent the occurrence of special circumstances that cause information distortion or non-compliance with conventional circumstances, and in turn serves as the basis for determining the location of the manganese carbonate-rich ore body.

[0032] Furthermore, the specific step of arranging multiple groups of electrodes at intervals in the manganese-rich ore section and applying electricity includes: using induced polarization technology to determine the positions of the electrodes in the manganese-rich ore section.

[0033] By adopting the above scheme, the above steps can accurately set the electrode within the range of the manganese carbonate-rich ore body according to the positive and negative excitation phenomena.

[0034] Furthermore, the apparent resistivity calculation model is:

[0035]

[0036] Among them, ΔU MN is the primary field voltage in the ladder information of the induced polarization; I is the power supply current of the ladder transmitter in the induced polarization; K is the device coefficient.

[0037] Furthermore, the calculation formula of the device coefficient is:

[0038]

[0039] Among them, A and B are power supply electrodes respectively, M and N are measurement points respectively, AM is the distance between A and M, AN is the distance between A and N, BM is the distance between B and M, and BN is the distance between B and N.

[0040] Furthermore, the specific steps of using the well-ground induced polarization technology to trace the extension range information of the manganese carbonate-rich ore body include:

[0041] Use borehole-ground induced polarization technology to collect polarization rate anomaly information;

[0042] Analyze the polarizability anomaly information: If the polarizability anomaly information presents an abnormal characteristic response from positive to negative, the extension direction of the manganese carbonate-rich ore body is determined.

[0043] By adopting the above scheme, the above steps utilize the characteristics of high-maturity organic matter in the manganese carbonate-rich ore body and metal sulfide in the stratum. The polarizability anomaly information obtained by the well-ground induced polarization technology will show an abnormal characteristic response from positive to negative. It can be inferred that it is a mineral-induced anomaly, and then the extension direction of the manganese carbonate-rich ore body is determined.

[0044] It helps to adopt the corresponding measurement method according to the actual situation on site, which is effective and fast.

[0045] In summary, the present application includes at least one of the following beneficial technical effects:

[0046] 1. This application uses remote sensing technology to implement non-contact preliminary exploration in a preset work area to delineate the manganese-bearing strata on the surface. Then, the manganese-rich ore section is further determined in the manganese-bearing strata by ground tracing. Then, the identification information related to the manganese ore body is explored by induced polarization mid-ladder technology to determine the location of the hidden manganese carbonate-rich ore body. Then, the well-ground induced polarization technology is used to trace the extension of the manganese ore body at the location of the manganese carbonate-rich manganese ore body, which helps to know the coverage of the manganese carbonate-rich ore body.

[0047] 2. This application provides geologists with a detection method that improves exploration efficiency and safety, thereby reducing the time geologists work in harsh environments and improving their work safety. It helps to provide a practical method for in-depth search of hidden manganese carbonate-rich ore bodies and provides a basis for subsequent comprehensive drilling deployment. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 This is a flow chart of the steps of a method for detecting hidden rich manganese carbonate ore in Example 1 of the present application.

[0049] Figure 2 This is a flowchart of the specific steps of using remote sensing technology to delineate surface manganese-containing strata as described in a method for detecting concealed rich manganese carbonate ore in Example 1 of the present application.

[0050] Figure 3 This is a flow chart of the preparation steps before using the induced polarization ladder technology in a method for detecting a concealed rich manganese carbonate ore in Example 1 of the present application.

[0051] Figure 4 This is a flowchart of the specific steps of using the induced polarization ladder technology to determine the location of the hidden manganese carbonate-rich ore body in the manganese-rich ore section in a hidden manganese carbonate-rich ore detection method in Example 1 of the present application.

[0052] Figure 5 This is a flow chart of the steps of a method for detecting hidden rich manganese carbonate ore in Example 2 of the present application. DETAILED DESCRIPTION

[0053] The following embodiments are combined with the attached Figure 1-Figure 5 This application is described in further detail.

[0054] Embodiment 1:

[0055] Reference Figure 1 , a method for detecting concealed rich manganese carbonate ore, comprising:

[0056] S1. Use remote sensing technology to delineate surface manganese-bearing strata.

[0057] S2. Conduct surface tracing in the area where the manganese-bearing strata are located to determine the manganese-rich ore section.

[0058] S3. Use induced polarization mid-elevation technology to determine the location of the hidden manganese carbonate-rich ore body in the manganese-rich ore section.

[0059] S4. Use underground induced polarization technology to trace the extension range of the manganese carbonate-rich ore body.

[0060] Specifically: This application uses remote sensing technology to implement non-contact preliminary exploration in a preset work area, which is conducive to reducing the length of time geologists work in harsh environments and improving the work safety of geologists. After the surface manganese-bearing strata are delineated, ground tracing is carried out in the area where the manganese-bearing strata are located. Ground tracing is to conduct field geological surveys along the area where the manganese-bearing strata are located, so as to accurately observe and investigate the geological body contours of the manganese-rich ore section, thereby determining the location of the manganese-rich ore section. Then, the induced polarization mid-ladder technology is used to explore the identification information related to the manganese ore body, so as to determine the location of the hidden manganese carbonate-rich ore body. The well-ground induced polarization technology is used to trace the extension of the manganese ore body at the location of the manganese carbonate-rich ore body, which helps to know the coverage of the hidden manganese carbonate-rich ore body. It provides a practical method for in-depth search of specific hidden manganese carbonate-rich ore bodies, and provides a basis for subsequent comprehensive drilling deployment.

[0061] As one implementation manner, step S1 specifically comprises:

[0062] As mineral-bearing strata are formed, corresponding chemical halos, surface information and alteration information will be formed on the surface as the ore body moves.

[0063] Reference Figure 2 Taking manganese-bearing strata as an example, this application uses remote sensing technology, that is, satellites as the basic data information source, to obtain remote sensing images of the working area such as the Malkansu area in the western Kunlun Mountains through satellite remote sensing. The remote sensing images at this time refer to the original remote sensing images. The imaging quality of the original remote sensing images does not meet the recognition requirements. Therefore, it is necessary to process and enhance the above remote sensing images, as follows:

[0064] The original remote sensing image related data is preprocessed by geometric correction, geographic registration, etc. to obtain the image data of each band with unified geographic coordinates and correction control points. Then, the characteristic values ​​of each band are statistically analyzed, and the three band combinations with relatively small correlation coefficients are obtained by comparison for color synthesis to obtain the basic remote sensing image.

[0065] Then, based on the geological information mapped by each band and the preset manganese ore-bearing geological conditions, band ratio, principal component analysis and HIS transformation (each letter of HIS refers to the three variables of hue, saturation and brightness) are carried out to obtain an enhanced remote sensing image.

[0066] Implementing the above steps helps to obtain remote sensing images with clear texture, rich colors, distinct layers and accurate accuracy, which facilitates the subsequent processing of remote sensing images.

[0067] Next, the present application uses a computer to identify and process remote sensing images to determine whether there is surface information and alteration information related to manganese-containing ores. Specifically, the surface information related to manganese-containing ores may involve the distribution of limestone, surface color tone, linear image features, annular image features, or layered image features, and the alteration information may involve alteration anomalies related to mineralization, such as iron staining anomalies, rhodochrosite anomalies, pyrolusite anomalies, or hydroxyl anomalies. When the computer identifies the presence of information such as limestone distribution and alteration anomalies in the remote sensing image, the corresponding area in the working area is determined as a manganese-containing stratum.

[0068] When remote sensing technology is used to delineate the surface manganese-bearing strata, ground tracing is carried out in the area where the manganese-bearing strata are located. The ground tracing method can be a route geological survey or a profile survey. The survey combines observation and research to obtain clues to manganese-rich mineralization, and then trenching is used to determine the manganese-rich ore section. The observation method of the route geological survey can be to track and search for special strata, contact boundaries and / or faults of manganese-bearing strata along the strike of the manganese-bearing strata. The observation method includes but is not limited to the use of manual field observation along the line and / or intelligent shooting equipment to record the ground conditions, which helps to improve the reliability of the records, and the intelligent shooting equipment can be equipped with a handheld fluorescence rapid analyzer to perform real-time geochemical rapid analysis of the ground conditions, which is convenient for geologists to conduct off-site observations. The above operations serve as an indicator for determining the location of the manganese-rich ore section.

[0069] Reference Figure 3 In this embodiment, before step S3, the following steps are included:

[0070] S301, set up IP middle ladder transmitter and IP middle ladder receiver. Specifically, the IP middle ladder transmitter model can be NT-30 transmitter, its output power is 30KW, output voltage is 50-1000V, output current is 0.2-43A, and the current stability is 0.1%-0.2%. The IP middle ladder receiver model can be WDJS-3 digital DC IP receiver.

[0071] S302, the performance of the IP transmitter and IP receiver is verified. Specifically, the IP transmitter and IP receiver are verified according to the specification requirements, such as using a standard time domain IP simulator with a signal source output voltage of 15mV, 100mV, 750mV, and 1000mV, so as to verify the performance of each instrument. This can ensure the stability of the performance of each instrument and ensure that the instrument can meet the needs of field exploration.

[0072] S303, determine the working parameters for implementing the electromagnetic ladder. The working parameters include power supply time and power-off delay. First, preliminarily set multiple working parameter options, and then select through experiments. Specifically, when the distance between the power supply electrodes, i.e., the distance between points AB, is the same as 1200m, the inflection point of the abnormal polarization rate is more obvious when the power supply time is 4s and the power-off delay is 100ms. This helps to facilitate the observation of abnormal polarization rate. Therefore, the working parameters are determined as a power supply time of 4s and a power-off delay of 100ms.

[0073] After completing the above verification settings, refer to Figure 4 , implement step S3, specifically including:

[0074] S31. Multiple groups of electrodes are arranged at intervals in the manganese-rich ore section to conduct electricity.

[0075] S32. Use observation instruments to detect data on multiple groups of electrodes after power is supplied, and obtain apparent polarizability.

[0076] S33. Based on the apparent resistivity calculation model, the apparent resistivity is calculated.

[0077] S34. Obtain information about the location of the manganese carbonate-rich ore body based on the apparent polarizability and the apparent resistivity.

[0078] After determining the setting position of the power supply electrode, multiple groups of electrodes are set at intervals, and the multiple groups of electrodes are energized by conductive wires, and the conductive wires are bare copper wires. The observation instrument is a 1000V megohmmeter. Before work every day, a 1000V megohmmeter is used to detect the insulation of the power supply electrode and the measuring wire to the ground. The test results show that the insulation resistance of the power supply wire to the ground is greater than 2MΩ / km, and the insulation resistance of the measuring wire to the ground is greater than 10MΩ / km. In this embodiment, the power supply current intensity is ≥5A, and the primary field potential difference is ≥10mV. In addition, in the process of power-on detection in the field, the apparent polarization rate obtained has mutation points, distortion points, and quality-questionable points. In order to make the detected data reliable and valid, it is necessary to perform arithmetic averaging on the apparent polarization rate data detected multiple times, and obtain the arithmetic mean value as the ladder recording data in the induced polarization, so that the recorded data is reliable and valid.

[0079] Then, based on the apparent resistivity calculation model, the apparent resistivity data is calculated. Specifically, as one of the implementation methods, the multiple groups of electrodes include power supply electrodes and measuring electrodes, and the device coefficient is calculated according to the positions of the power supply electrodes and measuring electrodes in the manganese-bearing rock system distribution area, and then the apparent resistivity data, i.e., ρ, is obtained according to the primary field voltage, power supply current, and device coefficient. s , the apparent resistivity calculation model is:

[0080]

[0081] Among them, ΔUMN is the primary field voltage in the ladder information of IP; I is the power supply current of the ladder transmitter in IP; K is the device coefficient. Specifically, the calculation formula of the device coefficient is:

[0082]

[0083] Among them, A and B are power supply electrodes, AB is the distance between power supply electrodes A and B, M and N are measuring electrodes, MN is the distance between measuring electrodes M and N, the distance of AB is greater than the distance of MN, and points M and N are located between A and B. That is, AM is the distance between A and M, AN is the distance between A and N, BM is the distance between B and M, and BN is the distance between B and N. The above A, B, C, and D are the four small poles of the outcrop.

[0084] Based on the apparent resistivity data, an apparent resistivity curve is generated and analyzed to obtain information about the location of the manganese carbonate-rich ore body.

[0085] The apparent resistivity curve is analyzed, and the numerical range of the apparent resistivity value is used to identify various types of rocks and minerals in the working area. Specifically, values ​​less than 1000ΩM are low resistance, 1000-3500ΩM are medium resistance, and greater than 4000ΩM are high resistance. High resistance mainly corresponds to granite; medium resistance mainly corresponds to tuff, andesite and fine-grained limestone; low resistance mainly corresponds to carbonaceous mudstone.

[0086] Furthermore, combined with the actual exploration situation, manganese carbonate-rich ore bodies are generally accompanied by the appearance of pyrite and mature organic matter. The location of low resistance obtained by induced polarization ladder means that the stratigraphic lithology here is carbonaceous mudstone rich in pyrite. Therefore, the above-mentioned electrical structural characteristics can be used as identification information about the location of manganese carbonate-rich ore bodies.

[0087] Considering the irregular distribution of manganese ore bodies in the spatial distribution area of ​​manganese-bearing rock series, the manganese-bearing ore section is only a rough prediction of the location of the manganese ore body. In order to accurately implement the induced polarization ladder in the spatial distribution area, it is necessary to determine the location of the power supply electrode. As one implementation method, the specific steps of setting multiple groups of power supply electrodes at intervals in the manganese-rich ore section include: S311, using the induced polarization method to determine the location of the power supply electrode in the manganese-rich ore section.

[0088] The implementation principle of the induced polarization method is: connect the power supply electrode A and the power supply electrode B to the power supply anode respectively. Among them, when the power supply electrode A is connected to the power supply anode, it is forward power supply, and when the power supply electrode B is connected to the power supply anode, it is reverse power supply. If there is no metal sulfide ore between the two power supply electrodes, such as there is a graphite ore with ordinary water as the medium between the two power supply electrodes, then the negative TV polarization rate is almost equal to the positive TV polarization rate, and the difference between the two is not obvious. If there is a metal sulfide such as pyrite between the two power supply electrodes, the difference between the negative TV polarization rate and the positive TV polarization rate is relatively obvious, that is, pyrite has a significant difference in forward polarization and reverse polarization. Pyrite and high content of organic matter are the basic characteristics of the presence of manganese carbonate-rich bodies. According to the above principle, the positions of the two power supply electrodes can be determined to be set within the range of the manganese-containing ore body, which is convenient for the subsequent induced polarization ladder to improve the degree of induced response.

[0089] After step S3, the method for detecting hidden manganese carbonate-rich ore of the present application further includes: S4, using well-ground induced polarization technology to trace the extension range information of the manganese carbonate-rich ore body. The specific steps include:

[0090] S41. Use well-ground induced polarization technology to collect polarization abnormality information;

[0091] S42. Analyze the polarizability anomaly information. If the polarizability anomaly information presents an abnormal characteristic response of changing from positive to negative, determine the extension direction of the manganese carbonate-rich ore body.

[0092] The above steps utilize that the manganese carbonate-rich ore body has high-maturity organic matter, and the corresponding strata of the manganese carbonate-rich ore body have the characteristics of metal sulfide. The well-ground induced current technology is used at the manganese carbonate-rich ore body, and the result will show an abnormal characteristic response from positive to negative. This is because the cathode overvoltage of the carbonaceous material is greater than the anode overvoltage when reverse power is supplied.

[0093] Therefore, if the polarizability anomaly information is collected and analyzed, and the abnormal characteristic response from positive to negative is presented, the occurrence location of the manganese carbonate-rich ore body can be indicated, and then the extension direction of the manganese carbonate-rich ore body can be determined. This implementation can provide a basis for comprehensive drilling deployment, with strong reliability and significant effect.

[0094] Among them, the implementation of the well-ground induced polarization technology can include the following methods: placing the power supply electrode A in the well position, using the power supply electrode B as the remote pole position, and placing the measuring device on the ground. Fix the depth of the power supply electrode A in the well position, and arrange it along the profile measurement according to a certain measuring network on the ground, so as to realize the profile measurement type well-ground induced polarization measurement. The measuring network can be a grid or a radiation network. The principle of well-ground induced polarization is: place the power supply electrode A at a selected depth in the well, and place the power supply electrode B at "infinity" on the ground, and arrange the measuring electrode M and the measuring electrode N on the ground and measure along the measuring line. The power supply electrode A pole can use a brush electrode, and the power supply electrode B should be as far away from the well position as possible, and the connection line from the power supply electrode B to the well position should be perpendicular to the measuring line connected to the measuring electrode M and the measuring electrode N.

[0095] As another embodiment, the layout of the power supply electrode and the measuring electrode is changed in combination with the actual field conditions, such as whether the number of wells is sufficient, whether the spacing between wells is in accordance with the requirements, or whether the depth of the wells is in accordance with the requirements, so as to replace it with an induced polarization operation method that meets the field conditions, such as a well measurement method and / or a well-to-well measurement. Subsequently, it is only necessary to analyze the polarizability anomaly information obtained by the induced polarization operation, and if it is judged to present an abnormal characteristic response from positive to negative, the extension direction of the manganese carbonate-rich ore body is determined.

[0096] Embodiment 2:

[0097] Unlike Example 1, in Example 2, before using the induced polarization ladder technology to determine the location of the hidden manganese carbonate-rich ore body in the manganese-rich ore section, the following steps are also included: using wide-area electromagnetic technology to obtain the depth extension and occurrence of the stratum containing the manganese-rich ore section. Figure 5 The method for detecting hidden rich manganese carbonate ore of this embodiment includes:

[0098] S1. Use remote sensing technology to delineate surface manganese-bearing strata.

[0099] S2. Conduct surface tracing in the area where the manganese-bearing strata are located to determine the manganese-rich ore section.

[0100] S3. Use wide-area electromagnetic technology to obtain the depth extension and occurrence of the manganese-rich ore section.

[0101] S4. Use induced polarization mid-elevation technology to determine the location of the hidden manganese carbonate-rich ore body in the manganese-rich ore section.

[0102] S5. Use underground induced polarization technology to trace the extension range of the manganese carbonate-rich ore body.

[0103] Among them, the specific steps of using wide-area electromagnetic technology to obtain the depth extension and occurrence of the manganese-rich ore section include:

[0104] Deploy the field source. The specific steps of deploying the field source include:

[0105] Determine the location of the field source. The actual terrain, landforms, no interference sources such as high-voltage lines, and areas without human activities are taken into consideration. The field source orientation can be 350°-360°, for example, the orientation can be 353°. The distance between the power supply electrodes A and B in the field source position can be 1 km.

[0106] Lay out power supply electrodes. Specifically, use multiple pieces of aluminum foil, dig at least 30 electrode pits on each side, the pit depth can be 0.8m, and the distance between adjacent pits is not less than 2m. Pour salt water on the aluminum foil, and then compact the rammed earth to ensure good grounding and reduce the grounding resistance of the two power supply electrodes AB.

[0107] Deploy wide-area electromagnetic transceivers. The wide-area electromagnetic transceiver can include at least one wide-area electromagnetic transmitter and at least four wide-area electromagnetic receivers. Before installation, conduct transceiver distance tests, consistency tests, and polar distance tests on the wide-area electromagnetic transceiver. Ensure that all instruments perform well, and that calibration and consistency errors meet design and specification requirements, thereby ensuring that the collected information is reliable and effective.

[0108] In addition, it is also necessary to control the parameters of the wide-area electromagnetic transceiver. The maximum supply voltage and current of the wide-area electromagnetic transmitter shall not exceed 80% of the rated value to ensure the stability and safety of the wide-area electromagnetic transceiver. The maximum voltage used in the wide-area electromagnetic is 900V and the maximum current is 40A.

[0109] After the field source is deployed, the wide-area electromagnetic technology is used to obtain the stratigraphic depth extension and occurrence of the manganese-rich ore section, which also includes the following steps: setting warning signs and isolation alarm devices outside the field source location. The isolation alarm device uses infrared sensors, thermal sensors, isolation alarm controllers, alarms and wireless communicators. An isolation line is provided outside the field source. The infrared sensors and thermal sensors are installed on the isolation line at intervals. When unrelated personnel and / or livestock cross the isolation line and enter the field source, the infrared sensor and / or thermal sensor senses the invading living body, generates an intrusion signal and sends it to the isolation alarm controller. The isolation alarm controller sends an alarm signal to the alarm based on the intrusion signal, so that the alarm sends an alarm message to the outside. The isolation alarm alarm sends the intrusion signal to the mobile terminal of the geologist through the wireless communicator to remind the geologist that there are other living bodies entering the field source, thereby realizing the reminder function. Specifically, the isolation alarm controller uses a single-chip microcomputer. The alarm uses a sound alarm such as a buzzer. This can help reduce the number of manual inspections by geologists and the time they stay in the work area. It can also help improve the accuracy of judging living intrusions and further improve the safety of implementing wide-area electromagnetic technology.

[0110] After setting warning signs and isolation alarm devices around the source location, using wide-area electromagnetic technology to obtain the depth extension and occurrence of the manganese-rich ore section also includes the following steps: laying out wide-area electromagnetic measuring points and wide-area electromagnetic electrodes. Specifically, this application lays out at least 4 wide-area electromagnetic profiles, which span the Permian and Carboniferous strata.

[0111] The use of wide-area electromagnetic technology to obtain the depth extension and occurrence of the manganese-rich ore section also includes the following steps: collecting wide-area electromagnetic observation data. Collecting wide-area electromagnetic observation data mainly refers to measuring an electromagnetic field component, specifically using a horizontal electric dipole field source. The specific implementation example is as follows:

[0112] The E-Ex electric field is used. To ensure sufficient signal-to-noise ratio, the electrode distance can be 40m, and non-polarized copper electrodes are used. This method can achieve good contact with the soil. Then, salt water is poured. Then, the grounding resistance is not greater than 5kΩ. In the high-resistance rock outcrop area, soil is placed around the electrode, and salt water is poured around the electrode to reduce the resistance. Then, salt water is poured around the electrode to reduce the resistance. Then, the electrode is buried 20-30cm in the soil to maintain good contact with the soil. Finally, the wide-area electromagnetic measurement points are distributed within a 30° angle sector on both sides of the perpendicular bisector of the two electrodes of the field source.

[0113] The use of wide-area electromagnetic technology to obtain the depth extension and occurrence of the manganese-rich ore section also includes the following steps: based on the wide-area electromagnetic observation data and the preset wide-area electromagnetic apparent resistivity definition model, the wide-area electromagnetic apparent resistivity is obtained.

[0114] Specifically, the apparent resistivity definition model of wide-area electromagnetics is:

[0115]

[0116] Among them, ρ s represents the apparent resistivity, Refers to EE χ The electromagnetic effect function of wide-area electromagnetic detection, in which i is a pure imaginary number, k refers to the wave number, and r is the transmitting and receiving distance. It is a coefficient related only to the pole distance, called the device coefficient for extracting apparent resistivity from wide-area electromagnetic sounding. dL refers to the length of the transmitting dipole source laid on the uniform earth surface. In addition, ΔV MN =E χ ·d MN ,E χ The measurement is obtained by measuring the potential difference between electrodes M and N. MN To measure the distance between electrodes M and N.

[0117] The use of wide-area electromagnetic technology to obtain the depth extension and occurrence of the stratum containing the manganese-rich ore section also includes the following steps: dividing the stratum according to the wide-area electromagnetic apparent resistivity, and obtaining the depth extension and occurrence of the stratum containing the manganese-rich ore section. Specifically, the stratum is divided according to the wide-area electromagnetic apparent resistivity characteristics. In the Carboniferous stratum, the top plate of the manganese-rich ore section has a high-resistance feature and the bottom plate has a low-resistance feature. The spatial distribution of the stratum where the manganese-rich ore section is located can be determined based on the above-mentioned identification. The spatial distribution can include the depth extension and occurrence of the stratum, which is convenient for further determining the location of the concealed manganese carbonate-rich ore body.

[0118] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A method for detecting hidden rich manganese carbonate ore, characterized in that: include: Remote sensing technology is used to delineate surface manganese-bearing strata; Conducting surface tracing in the area where the manganese-bearing formation is located to determine the manganese-rich ore zone; Wide-area electromagnetic technology is used to obtain the depth extension and occurrence of the manganese-rich ore section; Using induced polarization mid-elevation technology to determine the location of the hidden manganese carbonate-rich ore body in the manganese-rich ore section; Using underground induced polarization technology to trace the extension range of the manganese carbonate-rich ore body; The specific steps of using wide-area electromagnetic technology to obtain the depth extension and occurrence of the stratum containing the manganese-rich ore section include: Lay out the field source and set up warning signs and isolation alarm devices outside the field source location; Determine the location of the field source; Laying out power supply electrodes; Deploy wide-area electromagnetic transceiver devices and perform parameter control on the wide-area electromagnetic transceiver devices; Deploy wide-area electromagnetic measuring points and wide-area electromagnetic electrodes; Collect wide-area electromagnetic observation data; Based on the wide-area electromagnetic observation data and the preset wide-area electromagnetic apparent resistivity definition model, the wide-area electromagnetic apparent resistivity is obtained; The strata are divided according to the wide-area electromagnetic apparent resistivity to obtain the depth extension and occurrence of the strata containing manganese-rich ore sections.

2. A method for detecting hidden rich manganese carbonate ore according to claim 1, characterized in that: The specific steps of using remote sensing technology to delineate the surface manganese-containing strata include: Acquire remote sensing images of the work area based on satellites as data information sources; process and enhance the remote sensing images; When it is identified that the remote sensing image contains surface information and alteration information related to manganese-containing ore, the corresponding manganese-containing stratum is determined.

3. A method for detecting hidden rich manganese carbonate ore according to claim 1, characterized in that: The ground tracing method includes using route geological survey clues or profile survey clues.

4. A method for detecting hidden rich manganese carbonate ore according to claim 1, characterized in that: The preparation steps before adopting the IP mid-elevator technology include: Set up an induced polarization medium ladder transmitter and an induced polarization medium ladder receiver; Performing performance verification on the IP medium ladder transmitter and the IP medium ladder receiver; Determine the operating parameters for implementing the IP ladder.

5. A method for detecting hidden rich manganese carbonate ore according to claim 4, characterized in that: The specific steps of using the induced polarization ladder technology to determine the location of the hidden manganese carbonate-rich ore body in the manganese-rich ore section include: Multiple groups of electrodes are arranged at intervals in the manganese-rich ore section to conduct electricity; Using an observation instrument to detect data on the electrode after power is supplied, and obtaining an apparent polarizability; Based on the apparent resistivity calculation model, the apparent resistivity is calculated; Information on the location of the manganese carbonate-rich ore body is obtained based on the apparent polarizability and the apparent resistivity.

6. A method for detecting hidden rich manganese carbonate ore according to claim 5, characterized in that: The specific step of arranging multiple groups of electrodes at intervals in the manganese-rich ore section to conduct electrification includes: using induced polarization technology to determine the positions of the electrodes in the manganese-rich ore section.

7. A method for detecting hidden rich manganese carbonate ore according to claim 5, characterized in that: The apparent resistivity calculation model is: Among them, ΔU MN is the primary field voltage in the ladder information of the induced polarization; I is the power supply current of the ladder transmitter in the induced polarization; K is the device coefficient.

8. A method for detecting hidden rich manganese carbonate ore according to claim 7, characterized in that: The calculation formula of the device coefficient is: Among them, A and B are power supply electrodes respectively, M and N are measurement points respectively, AM is the distance between A and M, AN is the distance between A and N, BM is the distance between B and M, and BN is the distance between B and N.

9. A method for detecting hidden rich manganese carbonate ore according to claim 1, characterized in that: The specific steps of using the well-ground induced polarization technology to trace the extension range information of the manganese carbonate-rich ore body include: Use borehole-ground induced polarization technology to collect polarization rate anomaly information; Analyze the polarizability anomaly information. If the polarizability anomaly information presents an abnormal characteristic response from positive to negative, the extension direction of the manganese carbonate-rich ore body is determined.

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