A geological exploration method and device using local relative gravity deviation

Abstract

The present invention relates to a geological exploration method and apparatus utilizing local relative gravity deviation, belonging to the field of geological exploration technology. The method comprises: establishing a reference three-dimensional coordinate system using any point within the area to be monitored as a reference point, and determining the gravity direction of the reference point; obtaining the gravity deviation angle between the observation point and the reference point based on the gravity direction of the reference point, based on the reference three-dimensional coordinate system; determining gravity anomalies based on the relationship between the gravity deviation angle and a preset deviation threshold, and determining geological conditions based on the gravity anomalies. The present invention solves the technical problem in the prior art of using local gravity for deviation measurement, where gravity only has magnitude but no direction, which significantly restricts inversion in fields such as mineral exploration.

Description

Technical Field

[0001] The present invention relates to the field of gravity exploration technology, and in particular to an exploration method and device utilizing local relative gravity deviation. Background Art

[0002] Gravity is a very important parameter in geological exploration, reflecting the distribution of underground rock and soil in a local area, geological structural characteristics, etc. Mineral exploration, cultural relics protection, etc. are applied in local areas, and only the local gravitational acceleration needs to be obtained. Existing gravity acceleration measurement technology uses Newton's second law to obtain the measured value of gravity acceleration from the distance and time of free fall. Commonly used gravity measurement equipment, such as CG-5 and CG-6, can measure relative gravity. With technological advances, absolute gravity measurement equipment has gradually been put into use, such as cold atom quantum gravimeters and superconducting gravimeters, and the measurement accuracy has also been greatly improved.

[0003] Relative gravimeters offer high sensitivity and low noise, while absolute gravimeters offer high accuracy and require no regular calibration. However, the gravitational acceleration obtained from both relative and absolute gravity measurements is a scalar quantity, representing only the magnitude of the gravitational acceleration without direction. This limits their usefulness in gravity exploration and significantly restricts inversion in fields such as mineral exploration, severely impacting gravity interpretation.

[0004] Therefore, a new local gravity deviation measurement method is urgently needed to make up for the missing measurement of the direction of gravity acceleration and restore the gravity vector field to optimize the gravity analysis and inversion effects; and improve the efficiency of local gravity deviation measurement, thereby greatly improving the application scenarios of gravity exploration. Summary of the Invention

[0005] In view of this, it is necessary to provide an exploration method and device that utilizes local relative gravity deviation to solve the technical problem that when local gravity is used for deviation measurement in the existing technology, gravity only has magnitude but no direction, which greatly restricts inversion in fields such as mineral exploration.

[0006] In order to solve the above problems, the present invention provides a geological exploration method using local relative gravity deviation, comprising:

[0007] Take any point in the area to be monitored as the reference point, establish a reference three-dimensional coordinate system, and determine the gravity direction of the reference point;

[0008] Based on the reference three-dimensional coordinate system, according to the gravity direction of the reference point, the gravity deviation angle between the observation point and the reference point is obtained;

[0009] The gravity anomaly is determined based on the magnitude relationship between the gravity deviation angle and a preset deviation threshold, and the geological conditions are determined based on the gravity anomaly.

[0010] In a possible implementation, the reference point is the center point of the area to be detected;

[0011] The Z-axis direction of the reference three-dimensional coordinate system is opposite to the gravity direction of the reference point;

[0012] The X-axis direction of the reference three-dimensional coordinate system points to the east, and the Y-axis direction points to the south;

[0013] The XOY plane of the reference three-dimensional coordinate system is a meridian section at the location of the reference point.

[0014] In a possible implementation, obtaining the gravity deviation angle between the observation point and the reference point based on the reference three-dimensional coordinate system and the gravity direction of the reference point includes:

[0015] Taking the observation point as the coordinate origin, construct the observation three-dimensional coordinate system;

[0016] Based on the three-dimensional coordinate system, determine the initial gravity direction of the observation point;

[0017] According to the influence of longitude and latitude on the gravity direction of different points, the corrected gravity direction of the observation point relative to the reference coordinate system is determined;

[0018] The magnitude of the gravity deviation angle is determined based on the angle between the initial gravity direction of the observation point and the corrected gravity direction of the observation point.

[0019] In a possible implementation, obtaining the gravity deviation angle between the observation point and the reference point according to the gravity direction of the reference point based on the reference three-dimensional coordinate system further includes:

[0020] Project the initial gravity direction of the observation point onto the Z axis of the reference coordinate system to obtain the first projected gravity direction;

[0021] According to the first gravity projection direction, determine the projection angle of the gravity deviation angle on the xoy plane;

[0022] The deviation direction of the gravity deviation angle is determined according to the projection angle.

[0023] In a possible implementation, determining the gravity anomaly based on the magnitude relationship between the gravity deviation angle and a preset deviation threshold includes:

[0024] Determine the gravity anomaly at the observation point based on the relationship between the gravity deviation angle and the preset deviation threshold;

[0025] According to the deviation direction of the gravity deviation angle, the gravity deviation direction of the observation point is determined.

[0026] In a possible implementation, determining the gravity deviation of the observation point according to the relationship between the gravity deviation angle and a preset deviation threshold includes:

[0027] If the magnitude of the gravity deviation angle is equal to the preset deviation threshold, the projection angle is 0, and it is determined that the gravity accelerations of the observation point and the reference point are both in a normal state or in a similar abnormal state;

[0028] If the magnitude of the gravity deviation angle is not equal to the preset deviation threshold, it is determined that there is a deviation in the gravity acceleration between the observation point and the reference point.

[0029] In a possible implementation, determining geological conditions based on gravity anomalies includes:

[0030] If there is a deviation in the gravitational acceleration, it means there is an anomaly in the geology.

[0031] In a second aspect, the present invention further provides a geological exploration device utilizing local relative gravity deviation, comprising:

[0032] A reference determination module is used to establish a reference three-dimensional coordinate system with any point in the area to be monitored as a reference point, and to determine the gravity direction of the reference point;

[0033] The deviation angle determination module is used to obtain the gravity deviation angle between the observation point and the reference point based on the reference three-dimensional coordinate system and the gravity direction of the reference point;

[0034] The abnormality determination module is used to determine the gravity anomaly according to the magnitude relationship between the gravity deviation angle and a preset deviation threshold, and to determine the geological condition according to the gravity anomaly.

[0035] In a third aspect, the present invention further provides an electronic device, comprising: a processor and a memory;

[0036] The memory stores a computer-readable program executable by the processor;

[0037] When the processor executes the computer-readable program, the steps of the geological prospecting method using local relative gravity deviation are implemented.

[0038] In a fourth aspect, the present invention also provides a computer-readable storage medium, which stores one or more programs, and the one or more programs can be executed by one or more processors to implement the steps in the geological exploration method using local relative gravity deviation as described above.

[0039] The present invention has the following beneficial effects: first, a reference three-dimensional coordinate system is established using any point within the monitored area as a reference point, and the gravity direction of the reference point is determined. Using the reference three-dimensional coordinate system, the gravity deviation angle between the observation point and the reference point is obtained. Based on the relationship between the gravity deviation angle and a preset deviation threshold, the gravity anomaly is determined, and the geological conditions are determined based on the gravity anomaly. The present invention utilizes gravity angle deviation measurement to provide finer spatial resolution than traditional gravity magnitude measurements, enabling accurate discrimination of subtle gravity anomalies, particularly in complex terrain or high-noise environments. This method not only reflects the magnitude of the gravity anomaly at the observation point, but also its direction. This method is widely applicable in fields such as mineral resource exploration, archaeology, and geological surveys, and is particularly effective in searching for mineral deposits with large density differences (such as metal deposits and oil and gas reservoirs). The gravity deviation angle measurement method proposed in this invention features high measurement accuracy, low measurement cost, and strong stability, and is particularly efficient for measuring gravity anomalies in local areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A method flow chart of an embodiment of a geological exploration method using local relative gravity deviation provided by the present invention;

[0041] Figure 2 A schematic diagram of a reference coordinate system in the geological exploration method using local relative gravity deviation provided by the present invention;

[0042] Figure 3 A schematic diagram of the test point locations in the geological exploration method using local relative gravity deviation provided by the present invention;

[0043] Figure 4 In the geological exploration method using local relative gravity deviation provided by the present invention, the test point Establish the coordinate system after correcting the effects of longitude and latitude;

[0044] Figure 5 A schematic diagram of gravity deviation decomposition in the geological exploration method using local relative gravity deviation provided by the present invention;

[0045] Figure 6 1 is a schematic diagram of an embodiment of a geological exploration device utilizing local relative gravity deviation provided by the present invention;

[0046] Figure 7 It is a schematic diagram of the operating environment of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0047] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, and are not used to limit the scope of the present invention.

[0048] Existing gravity measurement parameters are all scalar quantities, representing only numerical values ​​but no direction. This makes them of limited use in gravity exploration and significantly restricts inversion in fields such as mineral exploration, severely impacting gravity interpretation. Therefore, a new measurement device and method is urgently needed to compensate for the lack of direction in gravity measurements and restore the gravity vector field, thereby improving gravity analysis and inversion, and significantly enhancing the application of gravity exploration.

[0049] A specific embodiment of the present invention discloses a geological exploration method using local relative gravity deviation, see Figure 1 ,include:

[0050] S101, taking any point in the area to be monitored as a reference point, establishing a reference three-dimensional coordinate system, and determining the gravity direction of the reference point;

[0051] S102, based on the reference three-dimensional coordinate system, according to the gravity direction of the reference point, obtaining the gravity deviation angle between the observation point and the reference point;

[0052] S103 : Determine the gravity anomaly according to the magnitude relationship between the gravity deviation angle and a preset deviation threshold, and determine the geological condition according to the gravity anomaly.

[0053] In this embodiment, a reference three-dimensional coordinate system is first established, using any point within the monitored area as a reference point. The gravity direction of the reference point is then determined. Using this reference three-dimensional coordinate system, the gravity deviation angle between the observation point and the reference point is then determined. Based on the relationship between the gravity deviation angle and a preset deviation threshold, the gravity anomaly is determined, and the geological conditions are determined based on the gravity anomaly. This invention utilizes gravity angle deviation measurement to provide finer spatial resolution than traditional gravity magnitude measurements, enabling accurate discrimination of subtle gravity anomalies, particularly in complex terrain or high-noise environments. This method not only reflects the magnitude of the gravity anomaly at the observation point, but also its direction. This method is widely applicable in fields such as mineral resource exploration, archaeology, and geological surveys, and is particularly effective in identifying mineral deposits with large density differences (such as metal deposits and oil and gas reservoirs). The gravity deviation angle measurement method proposed in this invention offers high measurement accuracy, low cost, and strong stability, and is particularly efficient for measuring gravity anomalies in localized areas.

[0054] It should be noted that the monitored area is any area requiring geological exploration or any area requiring gravity angular velocity calculation. A reference point is any point within the monitored area. By establishing a gravity direction reference within the target area (local area, monitored area), the gravity directions of all remaining points are compared with the reference point, and the effects of directional deviations due to differences in longitude and latitude are deducted. This yields the directional deviations of all points in the local area relative to the reference point, thus filling in the gaps in gravity measurements and enhancing the effectiveness of gravity exploration.

[0055] Furthermore, the direction of gravity is vertically downward (generally believed to point to the center of the earth), and the direction of gravity at each point is different due to the differences in longitude and latitude.

[0056] Furthermore, the reference point is the center point of the area to be inspected; the Z-axis of the reference three-dimensional coordinate system is opposite to the direction of gravity at the reference point; the X-axis of the reference three-dimensional coordinate system points east, and the Y-axis points south; and the XOY plane of the reference three-dimensional coordinate system is a meridian section at the location of the reference point. By establishing a reference coordinate system as described above, subsequent calculations of the deviation angle direction can be simplified.

[0057] It should be noted that, based on the reference three-dimensional coordinate system, the gravity deviation angle between the observation point and the reference point is obtained. In this embodiment, the gravity deviation angle is directly obtained by a gravity instrument.

[0058] Furthermore, in step S103, the preset deviation threshold is a user-defined angle parameter used to measure whether the gravity deviation value of the observation point represents a gravity anomaly. The preset deviation threshold can be 0° or any other angle.

[0059] In some embodiments, obtaining the gravity deviation angle between the observation point and the reference point based on the reference three-dimensional coordinate system includes:

[0060] Taking the observation point as the coordinate origin, construct the observation three-dimensional coordinate system;

[0061] Based on the three-dimensional coordinate system, determine the initial gravity direction of the observation point;

[0062] According to the influence of longitude and latitude on the gravity direction of different points, the corrected gravity direction of the observation point relative to the reference coordinate system is determined;

[0063] The magnitude of the gravity deviation angle is determined based on the angle between the initial gravity direction of the observation point and the corrected gravity direction of the observation point.

[0064] In this embodiment, any point in the local area is selected as the reference point, preferably the center point of the ground in the local area. The direction of gravity acceleration of the reference point is vertically downward, expressed as g, and a coordinate system is established with the point as the reference point, such as Figure 2 As shown, the Z-axis direction is opposite to the direction of the local gravitational acceleration g of the reference point, the X-axis points to the east, the Y-axis points to the south, and the XY plane is a tangent plane of the local meridian.

[0065] Furthermore, any ground observation point is selected in the local area , with observation points Create a coordinate system, such as Figure 3 As shown, Axis Direction and Correction Point relative to The direction of the gravity acceleration g after the deviation of gravity acceleration caused by longitude and latitude is opposite. The axis points east, The axis points south, and The plane is a section of the local meridian.

[0066] It should be noted that since the earth is a curved surface, different points on the surface correspond to different longitudes and latitudes, and the earth's gravity is toward the center of the earth. Therefore, under normal geological conditions, the direction of gravity at different points is also different. With reference point The deviation of gravity acceleration caused by longitude and latitude can be used to obtain the corrected gravity direction, such as Figure 4 As shown. Among them, the observation point without gravity anomaly The corrected gravity direction and The local gravitational acceleration has the same direction, g.

[0067] Furthermore, Figure 5 As shown, the observation point The actual acceleration due to gravity is , the actual acceleration due to gravity is and the corrected observation points Point relative to the base point The angle between the gravity acceleration g after the deviation of gravity acceleration caused by longitude and latitude is (gravity deviation angle), The angle of the observation point can reflect the Relative to the reference point Gravity deviation situation. exist The projection of the plane is , then the angle exist The projection of the plane is (Projection angle). The value range is [0,2 ), that is, the observation point At the reference point This coordinate system can be used in all directions of east, south, west and north. The size of indicates the magnitude of the gravity deviation. Indicates observation point Relative to a reference point The direction of gravity deviation.

[0068] pass The direction of the gravity deviation angle can be determined.

[0069] In some embodiments, determining the gravity anomaly based on the magnitude relationship between the gravity deviation angle and a preset deviation threshold includes:

[0070] Determine the gravity anomaly at the observation point based on the relationship between the gravity deviation angle and the preset deviation threshold;

[0071] According to the deviation direction of the gravity deviation angle, the gravity deviation direction of the observation point is determined.

[0072] In this embodiment, the preset deviation threshold is 0. If the size is 0, is also 0. Then the test point and The gravitational acceleration is completely matched, and the gravitational acceleration at the two points is normal or abnormal in the same direction.

[0073] If the angle If the size is not 0, then the test point and The gravitational acceleration does not match, and there is a deviation in the gravitational acceleration at the two points, which can be used to determine the reference point With test point Abnormal gravitational acceleration.

[0074] Furthermore, in local gravity measurement, the measurement reference points are selected within the local area. and multiple observation points 、 、 、 ······ , use the above method to measure the gravity deviation angle 、 、 、 ····· ,Thus, we can obtain the gravity anomaly conditions of multiple points in the local area.

[0075] Based on the above geological prospecting method using local relative gravity deviation, the embodiment of the present invention further provides a geological prospecting device using local relative gravity deviation, please refer to Figure 6 ,include:

[0076] A reference determination module 610 is used to establish a reference three-dimensional coordinate system using any point in the area to be monitored as a reference point, and to determine the gravity direction of the reference point;

[0077] The deviation angle determination module 620 is used to obtain the gravity deviation angle between the observation point and the reference point based on the reference three-dimensional coordinate system;

[0078] The abnormality determination module 630 is used to determine the gravity anomaly according to the magnitude relationship between the gravity deviation angle and a preset deviation threshold, and to determine the geological condition according to the gravity anomaly.

[0079] like Figure 7 As shown, based on the above-mentioned geological exploration method using local relative gravity deviation, the present invention also provides an electronic device, which can be a computing electronic device such as a mobile terminal, desktop computer, notebook, PDA, and server. The electronic device includes a processor 710, a memory 720, and a display 730. Figure 7 Only some of the components of the electronic device are shown, but it should be understood that it is not required to implement all of the shown components, and more or fewer components may be implemented instead.

[0080] In some embodiments, the memory 720 may be an internal storage unit of the electronic device, such as a hard drive or memory. In other embodiments, the memory 720 may also be an external storage device of the electronic device, such as a plug-in hard drive, a Smart Media Card (SMC), a Secure Digital (SD) card, a flash memory card, etc. Furthermore, the memory 720 may include both an internal storage unit and an external storage device. The memory 720 is used to store application software installed in the electronic device and various types of data, such as program code installed in the electronic device. The memory 720 may also be used to temporarily store data that has been output or is about to be output. In one embodiment, the memory 720 stores a geological exploration program 740 that utilizes local relative gravity deviation. This geological exploration program 740 that utilizes local relative gravity deviation can be executed by the processor 710, thereby implementing the geological exploration method utilizing local relative gravity deviation according to various embodiments of the present application.

[0081] In some embodiments, the processor 710 may be a central processing unit (CPU), a microprocessor, or other data processing chip, configured to execute program codes or process data stored in the memory 720, such as executing a geological exploration method utilizing local relative gravity deviation.

[0082] In some embodiments, the display 730 can be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, or an OLED (Organic Light-Emitting Diode) touchscreen. The display 730 is used to display information on the geological exploration electronic device utilizing local relative gravity deviation and to display a visual user interface. Components 710-730 of the electronic device communicate with each other via a system bus.

[0083] Those skilled in the art will appreciate that all or part of the process steps of the above-described embodiments can be implemented by instructing related hardware through a computer program, and the program can be stored in a computer-readable storage medium, such as a magnetic disk, an optical disk, a read-only memory, or a random access memory.

[0084] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed by the present invention should be covered by the scope of protection of the present invention.

Claims

1. A geological exploration method using local relative gravity deviation, characterized in that: include: Take any point in the area to be monitored as the reference point, establish a reference three-dimensional coordinate system, and determine the gravity direction of the reference point; Based on the reference three-dimensional coordinate system, according to the gravity direction of the reference point, the gravity deviation angle between the observation point and the reference point is obtained, including: constructing the observation three-dimensional coordinate system with the observation point as the coordinate origin; determining the initial gravity direction of the observation point based on the three-dimensional coordinate system; determining the corrected gravity direction of the observation point relative to the reference coordinate system according to the degree of influence of longitude and latitude on the gravity direction of different points; and determining the magnitude of the gravity deviation angle according to the angle between the initial gravity direction of the observation point and the corrected gravity direction of the observation point. The gravity anomaly is determined based on the magnitude relationship between the gravity deviation angle and a preset deviation threshold, and the geological conditions are determined based on the gravity anomaly.

2. The geological prospecting method using local relative gravity deviation according to claim 1, characterized in that: The reference point is the center point of the area to be detected; The Z-axis direction of the reference three-dimensional coordinate system is opposite to the gravity direction of the reference point; The X-axis direction of the reference three-dimensional coordinate system points to the east, and the Y-axis direction points to the south; The XOY plane of the reference three-dimensional coordinate system is a meridian section at the location of the reference point.

3. The geological prospecting method using local relative gravity deviation according to claim 1, characterized in that: The method of obtaining the gravity deviation angle between the observation point and the reference point based on the reference three-dimensional coordinate system and the gravity direction of the reference point further includes: Project the initial gravity direction of the observation point onto the Z axis of the reference coordinate system to obtain the first projected gravity direction; According to the first gravity projection direction, determine the projection angle of the gravity deviation angle on the xoy plane; The deviation direction of the gravity deviation angle is determined according to the projection angle.

4. The geological prospecting method using local relative gravity deviation according to claim 3, characterized in that: The determining of the gravity anomaly according to the magnitude relationship between the gravity deviation angle and a preset deviation threshold value includes: Determine the gravity anomaly at the observation point based on the relationship between the gravity deviation angle and the preset deviation threshold; According to the deviation direction of the gravity deviation angle, the gravity deviation direction of the observation point is determined.

5. The geological prospecting method using local relative gravity deviation according to claim 4, characterized in that: The step of determining the gravity deviation of the observation point according to the relationship between the gravity deviation angle and a preset deviation threshold comprises: If the magnitude of the gravity deviation angle is equal to the preset deviation threshold, the projection angle is 0, and it is determined that the gravity accelerations of the observation point and the reference point are both in a normal state or in a similar abnormal state; If the magnitude of the gravity deviation angle is not equal to the preset deviation threshold, it is determined that there is a deviation in the gravity acceleration between the observation point and the reference point.

6. The geological prospecting method using local relative gravity deviation according to claim 5, characterized in that: Determining geological conditions based on gravity anomalies includes: If there is a deviation in the gravitational acceleration, it means there is an anomaly in the geology.

7. A geological exploration device utilizing local relative gravity deviation, characterized in that: include: A reference determination module is used to establish a reference three-dimensional coordinate system with any point in the area to be monitored as a reference point, and to determine the gravity direction of the reference point; The deviation angle determination module is used to obtain the gravity deviation angle between the observation point and the reference point based on the reference three-dimensional coordinate system and the gravity direction of the reference point, including: constructing the observation three-dimensional coordinate system with the observation point as the coordinate origin; determining the initial gravity direction of the observation point based on the three-dimensional coordinate system; determining the corrected gravity direction of the observation point relative to the reference coordinate system based on the degree of influence of longitude and latitude on the gravity direction of different points; and determining the magnitude of the gravity deviation angle based on the angle between the initial gravity direction of the observation point and the corrected gravity direction of the observation point. The abnormality determination module is used to determine the gravity anomaly according to the magnitude relationship between the gravity deviation angle and a preset deviation threshold, and to determine the geological condition according to the gravity anomaly.

8. An electronic device, characterized in that: include: processor and memory; The memory stores a computer-readable program executable by the processor; When the processor executes the computer-readable program, the steps of the geological exploration method using local relative gravity deviation as described in any one of claims 1 to 6 are implemented.

9. A computer-readable storage medium, characterized in that The computer-readable storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the steps in the geological exploration method using local relative gravity deviation as described in any one of claims 1-6.

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