CN112033383A - Deep sea polymetallic nodule mining engineering geological environment monitoring system and method - Google Patents
Deep sea polymetallic nodule mining engineering geological environment monitoring system and method Download PDFInfo
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Abstract
The invention belongs to the technical field of deep sea marine environment monitoring, and relates to a deep sea polymetallic nodule mining engineering geological environment monitoring system and method. The system comprises a submarine sediment monitoring platform, a submarine submerged buoy, a sea surface control center and an acoustic communication device, wherein the submarine sediment monitoring platform and the submarine submerged buoy are connected with the sea surface control center through the acoustic communication device. The method comprises the steps of monitoring the thickness and the property of the sediment on the surface layer of the seabed in situ, analyzing the distribution rule of the resuspension migration of the disturbed sediment, and finding the point with the largest influence as the optimal monitoring position according to the superposition of the influence ranges of the long-term resuspension sediment, thereby realizing the high-efficiency monitoring. And (3) obtaining the migration and distribution rule of the resuspension sediments by combining the change of the sediments with the flow speed and direction of the bottom water, and comprehensively evaluating the geological environment influence of the deep-sea polymetallic nodule mining engineering by combining the living environment characteristics of benthos in the mining area on the basis.
Description
Technical Field
The invention belongs to the technical field of deep sea marine environment monitoring, and relates to a deep sea polymetallic nodule mining engineering geological environment monitoring system and method.
Background
People gradually turn their eyes to the sea as land resources are consumed. 70% of the earth's area is covered by oceans, 15% of which are covered by polymetallic nodules. Polymetallic nodules are present on the surface of subsea sediments at water depths exceeding 4500 meters. When the deep sea polymetallic nodule is mined, the nodule needs to be dug out from the surface of a sediment by a mining vehicle and is transported to a sea surface mining ship through a pipeline, and the sediment disturbance generated in the mining process can increase the concentration of solid suspended particles in a water body so as to generate direct or indirect influence on the marine environment, influence the biological activity and change the chemical composition of the water body, so that the monitoring of the engineering geological environment of a mining area is particularly important.
At present, the monitoring of the multi-metal nodule mining environment focuses on the monitoring of marine bioactivity and seawater chemical properties, in-situ monitoring aiming at the engineering geological environment influence in the multi-metal nodule mining process does not appear, the current environmental monitoring is mostly focused on the investigation of an ore area environment base line, and the monitoring aiming at the engineering geological environment change in the mining process is not carried out. In addition, in the ore collecting process, the mining vehicle is always in a motion state, the position of a disturbance source is constantly changed, the generated deposit disturbance is superposed, the flow speed and the direction of bottom water cannot be accurately measured through traditional subsurface buoy observation, the migration distribution rule of the resuspension deposit cannot be clearly captured, and how to efficiently capture the dynamic change of the resuspension deposit in the mining process is the problem to be solved at present. Therefore, an in-situ monitoring system for geological environment of deep sea polymetallic nodule mining engineering is urgently needed to be established, and the flow velocity and the property of bottom layer water at the bottom of the sea and the thickness change and the property of surface sediments at the sea are monitored through the organic combination of a sediment observation platform and a submarine subsurface buoy, so that the distribution and migration rule of resuspension sediments in the mining process and the geological environment change characteristics of mining area engineering are mastered, and the geological environment influence degree of the deep sea polymetallic nodule mining engineering is comprehensively evaluated.
Disclosure of Invention
The invention provides a novel monitoring system and a novel monitoring method aiming at the blank problem of the traditional in-situ monitoring technology aiming at the influence of engineering geological environment in the process of multi-metal nodule mining.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
a deep sea polymetallic nodule mining engineering geological environment influence monitoring system, the submarine sediment monitoring platform mainly includes submarine surface sediment monitoring, offshore bottom water flow speed monitoring and solid suspended particle concentration monitoring in the near submarine water body; the submarine subsurface buoy mainly carries out in-situ monitoring on temperature, salinity, pH value, turbidity and water flow rate; the communication device is mainly used for providing communication for the sediment observation platform and the submarine submerged buoy; the sea surface control center controls the use of the sediment monitoring platform and the equipment in the submarine submerged buoy on one hand, and analyzes the data monitored by each monitoring equipment on the other hand to obtain the migration distribution rule of the resuspension sediment, so that the monitoring station can be adjusted timely.
The seabed surface sediment monitoring platform is integrated with a natural potential probe rod, an acoustic Doppler current profiler, a turbidimeter and an underwater camera, and is arranged at the top point of a mining vehicle ore collecting path of each mining block and the top point of a corner at the first turn on the mining vehicle ore collecting path. The high 1.8 meters of natural potential probe be fixed in the right side of retrieving the frame through the staple bolt, there is 10 centimetres high metal base cones the bottom, there is 20 centimetres high collection cabin at the top, there is the rings lower part at collection cabin top to have the recess of 2 centimetres height, the centre is the body of rod of electrode spacing 2 centimetres, electrode evenly distributed has a plurality ofly, the electrode be solid-state annular reference electrode (with the solid-state annular reference electrode material in application number 2019108263949 the same).
The monitoring equipment of the submarine submerged buoy mainly comprises an acoustic Doppler current profiler for downward monitoring and temperature and salinity sensors which are arranged from bottom to top at intervals of 10 meters, each monitoring equipment has an automatic storage function and can realize data transmission through a top acoustic communication device, the submarine submerged buoy is required to be arranged within 50 meters downstream of the background current velocity near the sediment monitoring platform, and the specific distance can be corrected and adjusted according to the field condition and the monitoring result. When the submarine subsurface buoy is laid for the first time, if the direction of the background water flow is the same as the direction of the ore collecting path of the mining vehicle, the submarine subsurface buoy is laid at a position which is perpendicular to the ore collecting path and is 1-meter away from the sediment monitoring position by about 200 meters; if the background water flow direction is opposite to the mining vehicle path, the submarine submerged buoy is required to be arranged in the position opposite to the ore collecting path and at an included angle of 135 degrees with the ore collecting path at the rear of the sediment monitoring platform by 300 meters. The actual distribution distance can be corrected and adjusted according to the field condition and the monitoring result. The monitoring content mainly comprises the in-situ monitoring of temperature, salinity, turbidity, water flow velocity and water flow direction.
The acoustic communication device comprises a deck unit, a relay buoy and an underwater acoustic transducer, wherein the relay buoy floats on the sea surface and supplies power to provide transfer service for acoustic remote communication through a solar panel, the underwater acoustic transducer floats at a position 100 meters away from the sea bed through a floating ball, and the lower part of the underwater acoustic transducer is connected to the sediment monitoring platform and the seabed submerged buoy through cables.
The system for monitoring the geological environment influence of the deep-sea polymetallic nodule mining engineering comprises a submarine sediment monitoring platform, a submarine submerged buoy, a sea surface control center and an acoustic communication device; the submarine sediment monitoring platform and the submarine submerged buoy are both connected with a sea surface control center through the acoustic communication device, floating balls are arranged on the top of the submarine observation platform and the top of the submarine submerged buoy to drive the acoustic transducer to float in water in order to reduce the influence of solid suspended particles in a water body on the acoustic communication effect, and the distance between the acoustic transducer and the bottom of a seabed is not less than 100 meters; the acoustic communication device is additionally provided with a relay buoy serving as an acoustic communication transfer station for ensuring the remote communication effect. And because of the movement of the mining vehicle and the change of the mining site, the communication cable type transmission mode is easy to be disturbed and is not suitable for the use of submarine mining, and the acoustic communication is influenced by the bottom resuspension sediment to reduce the communication effect, so the system of the invention utilizes the acoustic relay buoy mode to carry out communication, and the top of the submarine equipment utilizes a cable to suspend the acoustic transducer in the water body 100 meters away from the bottom, thereby passing through the resuspension sediment acoustic signal shielding area and realizing the communication function.
By monitoring the change of parameters such as the heavy sediment thickness, sediment property, bottom water property, bottom hydrodynamic force and the like of the sediment on the surface layer of the sea bottom in the process of mining the deep sea polymetallic nodule, the influence of the engineering geological environment of a mining area in the process of mining is analyzed, and the method mainly comprises the following steps:
1) the method comprises the steps of obtaining the thickness of heavy sediment and the change of the surface sediment properties (porosity and oxidation-reduction potential) along with mining time on different mining vehicle ore collecting paths in the multi-metal nodule mining process through in-situ monitoring;
2) the flow velocity and the direction of bottom water in a mining area are obtained through in-situ monitoring, and the concentration of solid suspended particles, the salinity of water and the temperature in water on different mining vehicle ore collecting paths change along with mining time;
3) and analyzing the migration distribution characteristics and rules of the resuspension sediments on the mining paths of different mining vehicles according to the monitoring data and by combining the flowing direction of the periodic ocean circulation flow near the seabed of the mining area. Therefore, the distribution positions of all monitoring parts in the geological environment influence monitoring system of the deep-sea polymetallic nodule mining engineering are adjusted, and a more efficient monitoring effect is expected to be achieved.
4) And based on the monitoring result, the influence of the geological environment of the deep sea polymetallic nodule mining engineering is comprehensively evaluated by combining the living environment characteristics of benthos in the mining area.
The monitoring platform of the submarine sediments mainly comprises the monitoring of the thickness and the property of the submarine surface sediments, the monitoring of the speed and the direction of the water flow near the sea bottom and the monitoring of the concentration of solid suspended particles in the water body near the sea bottom; the submarine subsurface buoy mainly carries out in-situ monitoring on temperature, salinity, pH value, turbidity, water flow velocity and direction; the communication device is mainly used for providing communication for the sediment observation platform and the submarine submerged buoy; the sea surface control center controls the use of the sediment monitoring platform and each device in the submarine submerged buoy on one hand, and analyzes the data monitored by each monitoring device on the other hand to obtain the migration distribution rule of the resuspension sediment, so that the monitoring station can be adjusted timely.
Compared with the prior art, the invention has the advantages and positive effects that:
1. the invention aims at the engineering geological environment change in the deep sea polymetallic nodule exploitation process, and analyzes the distribution rule of the resuspension migration of disturbed sediment in the nodule exploitation process by in-situ monitoring the thickness and the property of the sediment on the surface layer of the sea bottom, the hydrodynamic force and the property of the bottom layer. According to the superposition of the influence ranges of the long-term resuspension sediments, the point with the largest influence on the resuspension sediments is found as the optimal monitoring position, and efficient monitoring is realized.
2. The communication is carried out by using an acoustic relay buoy mode, and the top of the submarine equipment suspends the acoustic transducer in the water body by using a cable 100 meters away from the bottom, so that the acoustic transducer passes through the acoustic signal shielding area of the resuspension sediment, and the communication function is realized.
3. The method is based on monitoring the most direct sediment with environmental influence generated by multi-metal nodule mining, combines the bottom water flow speed and direction to obtain the migration and distribution rule of the re-suspended sediment, and combines the living environment characteristics of benthos in the mining area on the basis, thereby realizing comprehensive evaluation on the geological environment influence of the deep sea multi-metal nodule mining engineering.
Drawings
FIG. 1 is a schematic perspective view of a geological environment monitoring system for deep sea polymetallic nodule mining engineering according to an embodiment of the invention;
FIG. 2 is a schematic diagram illustrating the three-dimensional distribution characteristics of the concentration of suspended solid particles in seawater on the ore collecting path of the mining vehicle during the mining process of deep sea polymetallic nodules according to the embodiment of the invention;
FIG. 3 is a top view of a sediment resuspension migration distribution feature at different angles of mining vehicle migration path and background flow rate during deep sea polymetallic nodule mining according to an embodiment of the present invention;
FIG. 4 is a technical route diagram of the deep-sea polymetallic nodule mining engineering geological environment influence monitoring method of the invention.
The figures are numbered: the system comprises a submarine sediment monitoring platform 1, an acoustic transducer 101, a submarine shallow marker 2, an acoustic transducer 201, an acoustic communication device 3, an acoustic communication relay buoy 301, a mining ship 4, a sea surface control center 401, a submarine mining vehicle 5, a conveying hose 6, a mineral transfer station 7, a pipeline lifting system 8, a background water flow direction 9 and a sediment resuspension distribution characteristic 10.
Detailed Description
In order that the above objects, features and advantages of the present invention may be more clearly understood, the present invention will be further described with reference to specific embodiments. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and thus the present invention is not limited to the specific embodiments of the present disclosure.
Example 1
Fig. 1 is a schematic diagram of an in-situ monitoring system for geological environmental impact of deep-sea polymetallic nodule mining engineering, which is used for monitoring dynamic changes of the engineering geological environmental impact generated in the deep-sea polymetallic nodule mining process, and mainly relates to changes of sediments and bottom water bodies.
In this embodiment, taking a deep-sea polymetallic nodule pipeline lifting type mining method as an example, mining units are firstly divided for polymetallic nodules in a mining area, then the polymetallic nodules of each mining unit are collected by a mining vehicle 5, the polymetallic nodules are conveyed to a mineral transfer station 7 through a hose 6 behind the mining vehicle 5, and finally the polymetallic nodules are lifted to a mining ship 4 by a pipeline lifting system 8. The main approach for generating engineering geological environment influence in the process is the process of collecting ores in a mining unit by the mining vehicle 5, and the disturbance is generated on sediments on the surface layer of the sea bottom, so that the concentration of solid suspended particles in a water body is increased, the solid suspended particles are diffused and generate sedimentation under the action of self weight and hydrodynamic force, and the engineering geological properties of the sediments generating the re-sedimentation are changed. Therefore, the change of the deposit property of the mining area is taken as an important monitoring object in the invention.
Aiming at a target monitoring object, dividing a deep sea polymetallic nodule mining engineering geological environment influence monitoring system into four parts as follows: the system comprises a submarine sediment monitoring platform 1, a submarine submerged buoy 2, a sea surface control center 401 and an acoustic communication device 3; the submarine sediment monitoring platform 1 and the submarine submerged buoy 2 are both connected with a sea surface control center 4 through an acoustic communication device 3, floating balls on the tops of the submarine observation platform 1 and the submarine submerged buoy 2 drive the acoustic transducers 101 and 201 to float in water in order to reduce the influence of solid suspended particles in a water body on an acoustic communication effect, the acoustic transducers 101 and 201 are connected with the submarine sediment monitoring platform 1 and the submarine submerged buoy 2 at the bottom through cables, and the length of the cables is not less than 100 meters, namely the distance between the acoustic transducers and the bottom of a seabed is not less than 100 meters. The acoustic communication device 3 adds the relay buoy 301 as an acoustic communication relay station to ensure the effect of long-distance communication. The floating 301 top of the relay buoy is a solar cell panel, the middle part is a floating ball, the bottom is connected to the acoustic transducer through a cable, the solar cell panel and the floating ball float on the sea surface, and the solar cell panel supplies power to the acoustic transducer in water so as to provide transfer service for acoustic remote communication. Meanwhile, the strength of the transit signal can be adjusted by dragging the position of the relay buoy.
Further, the seabed surface sediment monitoring platform 1 is integrated with a natural potential probe rod, an acoustic Doppler current profiler, a turbidimeter and an underwater camera, and the seabed surface sediment monitoring platform is arranged at the top of the ore collecting path of the mining vehicle 5 in the mining block and the inflection point of the first turning on the ore collecting path of the mining vehicle 5 during the first arrangement. The monitoring contents mainly comprise monitoring of seabed surface sediments, monitoring of offshore bottom water flow speed and monitoring of concentration of solid suspended particles in the seabed-near water body.
Furthermore, the monitoring equipment of the submarine subsurface buoy 2 mainly comprises an acoustic Doppler current profiler for downward monitoring, and 9 groups of sensors, namely, temperature and salinity sensors which are arranged every 10 meters from bottom to top; each monitoring device has an automatic storage function and can realize data transmission through the top acoustic communication device. In addition, when the submarine subsurface buoy is laid for the first time, if the direction of the background water flow is the same as the direction of the ore collecting path of the mining vehicle 5, the submarine subsurface buoy 2 is laid at a position which is perpendicular to the ore collecting path and is about 200 meters away from 1 sediment monitoring; if the background water flow direction is opposite to the 5 mining vehicle path, the seabed submerged buoy 2 is arranged in the position which is opposite to the ore collecting path and forms an included angle of 135 degrees with the ore collecting path at the rear of the sediment monitoring platform by 300 meters. The actual distribution distance can be corrected and adjusted according to the field condition and the monitoring result. The monitoring content mainly comprises the in-situ monitoring of temperature, salinity, turbidity, water flow velocity and water flow direction.
Further, the acoustic communication device 3 is mainly composed of 3 parts: the deck unit, the relay buoy and the acoustic transducer of the underwater connection monitoring device on the mining vessel. The system has the main function of providing data transmission for the sediment observation platform and the submarine submerged buoy receiving and sending commands. The top of an acoustic transducer of the underwater connection monitoring device is pulled by a floating ball, the lower part of the acoustic transducer is pulled by the floating ball, and the acoustic transducer is connected to the monitoring device through a communication armored cable, and in order to reduce the influence of solid suspended particles on the communication effect, the distance from the acoustic transducer to the seabed is about 100 meters. The sea surface is provided with a relay buoy, the lower part of the relay buoy is connected with the acoustic transducer through a communication armored cable, and the lowering depth of the transducer and the position of the relay buoy can be adjusted to achieve a better communication effect.
Furthermore, the sea surface control center 4 controls the use of the individual devices in the sediment monitoring platform and the submarine subsurface buoy on the one hand, and analyzes the data monitored by each monitoring device on the other hand to obtain the migration distribution rule of the resuspension sediment, so that the monitoring station can be adjusted timely.
The migration and distribution law of sediment resuspension is shown in fig. 2, when a mining vehicle carries out ore collection operation on the seabed, the three-dimensional distribution characteristics of solid suspended particles generated by the sediment are disturbed in seawater, the sediment with large particles rises first and then falls rapidly after being disturbed, the sediment with small particles forms an atomized layer after being disturbed to float near the sea surface for a long time, and at the moment, the important objects to be monitored are the thickness of the large particles settled at different positions and the concentration and distribution characteristics of the small particles floating in the seawater. In order to reduce the monitoring cost and reduce the arrangement of monitoring points, but achieve better monitoring effect, the description is provided with reference to fig. 2. When the mining vehicle 5 carries out the mining operation in the mining area, when the background water flow direction of the ocean bottom layer water flow and the motion direction of the mining vehicle are on the same straight line, the speed of the background water flow is lower than 10 cm/s basically, and the migration speed of the mining vehicle is higher than 1 m/s basically, so that the mining vehicle disturbs the sediment to generate a more regular solid suspended particle concentration distribution state in the water body as shown in the uppermost graph in fig. 2. At the moment, the distribution of the sediment thickness, the seawater flow rate and turbidity profile at the sediment monitoring platform and the seawater flow rate and turbidity profile at the submarine submerged buoy can be obtained through the monitoring results of the submarine sediment monitoring platform 1 and the submarine submerged buoy 2, so that two profile data are obtained, and the data in the model can be corrected according to the concentration distribution curve shown in the model, so that the distribution rule of the sediment resuspension after disturbance can be obtained.
Furthermore, when the background water flow direction is not collinear with the direction of mining of the mining vehicle 5, the concentration distribution of the mining disturbance sediment in the body of water will have the results shown in the second and third graphs of fig. 2. The arrangement scheme is followed in the first arrangement of the submarine sediment monitoring platform and the submarine submerged buoy.
And finally, based on the monitoring system, the geological environment influence monitoring and comprehensive evaluation of the deep sea polymetallic nodule mining engineering are realized through the following steps.
1) In-situ monitoring is carried out through a sediment monitoring platform to obtain the thickness of the heavy sediment and the change of the surface sediment properties (porosity and oxidation-reduction potential) along with the mining time on different mining vehicle ore collecting paths in the multi-metal nodule mining process; the bottom water velocity and turbidity profile at that point, and the sediment motion image data.
2) The flow velocity and the direction of bottom water in a mining area are monitored in situ through a submarine subsurface buoy, and the concentration of solid suspended particles, the salinity and the temperature of water bodies in ore collecting paths of different mining vehicles change along with the mining time; the bottom water flow rate and turbidity profile at this point.
3) And analyzing the migration distribution characteristics and rules of the resuspension sediments on the mining paths of different mining vehicles by combining a sediment resuspension migration distribution characteristic model based on the flow direction and speed of the periodic ocean circulation near the seabed of the mining area according to the monitoring data. Therefore, the distribution positions of all monitoring parts in the deep-sea polymetallic nodule mining engineering geological environment influence monitoring system are adjusted in the whole mining system transportation process, and a more efficient monitoring effect is expected to be achieved.
4) And based on the monitoring result, the influence of the geological environment of the deep sea polymetallic nodule mining engineering is comprehensively evaluated by combining the living environment characteristics of benthos in the mining area.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes, without departing from the technical spirit of the present invention, and any simple modification, equivalent change and change made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the technical spirit of the present invention.
Claims (10)
1. A geological environment monitoring system for deep sea polymetallic nodule mining engineering is characterized by comprising
Monitoring platform of seabed sediment: the device is used for monitoring the thickness and the property of the sediment on the surface layer of the seabed, the speed and the direction of the water flow near the seabed and the concentration of solid suspended particles in the water body near the seabed;
submarine submerged buoy: the system is used for in-situ monitoring of temperature, salinity, Ph value, turbidity, water flow velocity and direction;
a communication device: communication is provided for the sediment observation platform and the submarine submerged buoy;
sea surface control center: the device is used for controlling the sediment monitoring platform and each device in the submarine submerged buoy, analyzing the monitoring data, obtaining the migration distribution rule of the resuspension sediment, and timely adjusting the monitoring station;
the submarine sediment monitoring platform and the submarine submerged buoy are connected with the sea surface control center through the acoustic communication device.
2. The deep-sea polymetallic nodule mining engineering geological environment monitoring system of claim 1, wherein the submarine sediment monitoring platform and the top of the submarine submerged buoy are connected with underwater acoustic transducers through cables.
3. The deep sea polymetallic nodule mining engineering geological environment monitoring system of claim 2, characterized in that the acoustic communication device comprises a relay buoy serving as an acoustic communication transfer station, the floating top of the relay buoy is provided with a solar cell panel, the middle of the relay buoy is provided with a floating ball, the bottom of the relay buoy is connected to an underwater acoustic transducer through a cable, the underwater acoustic transducer floats at a position at least 100 meters away from the seabed through the floating ball, the solar cell panel and the floating ball float on the sea surface, and the solar cell panel is electrically connected to the underwater acoustic transducer.
4. The system for geological environment monitoring in deep sea polymetallic nodule mining engineering according to claim 1, wherein the seafloor surface sediment monitoring platform integrates a natural potential probe, an acoustic doppler profiler, a turbidimeter and an underwater camera and is disposed at the top of the mining vehicle collection path of each mining block and the top of the corner of the first turn on the mining vehicle collection path.
5. The deep sea polymetallic nodule mining engineering geological environment monitoring system of claim 1, wherein the subsea subsurface buoy comprises a downwardly monitored acoustic doppler flow profiler, a plurality of vertically distributed temperature and salinity sensors.
6. The deep sea polymetallic nodule mining engineering geological environment monitoring system of claim 5, wherein the vertical spacing between adjacent temperature and salinity sensors is 10 meters.
7. The system for monitoring geological environment of deep sea polymetallic nodule mining engineering according to claim 1, wherein the arrangement position of the submarine submerged buoy is determined according to the background water flow direction and the mining vehicle path: when the direction of the background water flow is the same as the direction of the ore collecting path of the mining vehicle, the submarine submerged buoy is arranged at a position which is perpendicular to the ore collecting path and is 200 meters away from the sediment monitoring; when the direction of the background water flow is opposite to the path of the mining truck, the submarine submerged buoy is arranged in the opposite direction of the ore collecting path and at the position behind the sediment monitoring platform and 300 meters away from the ore collecting path at an included angle of 135 degrees.
8. The geological environment monitoring method for deep sea polymetallic nodule mining engineering is characterized by that,
the method mainly comprises the following steps:
1) obtaining the thickness of the heavy sediment on the ore collecting path of the mining vehicle and the change of the sediment property along with the mining time in the process of mining the multi-metal nodule;
2) acquiring the flow velocity and direction of bottom water in a mining area, and the concentration of solid suspended particles in a water body, the salinity of the water body and the temperature of the mining vehicle on a mining collection path are changed along with mining time;
3) analyzing the migration distribution characteristics and rules of the resuspension sediments on the mining paths of different mining vehicles by combining the flowing direction of the periodic ocean circulation near the seabed of the mining area according to the monitoring data;
4) and based on the monitoring result, the influence of the geological environment of the deep sea polymetallic nodule mining engineering is comprehensively evaluated by combining the living environment characteristics of benthos in the mining area.
9. The method for monitoring the geological environment of the deep sea polymetallic nodule mining engineering according to claim 8, wherein the thickness, the properties, the bottom hydrodynamic force and the properties of the sediment on the seabed are monitored in situ, the distribution rule of the disturbed sediment resuspension migration in the nodule mining process is analyzed, and the point with the largest influence of the resuspended sediment is found as the optimal monitoring position according to the superposition of the influence ranges of the long-term resuspended sediment.
10. The method for monitoring the geological environment of the deep sea polymetallic nodule mining engineering according to claim 9, wherein the communication is carried out by means of an acoustic relay buoy.
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| CN113982590A (en) * | 2021-12-27 | 2022-01-28 | 中国海洋大学 | Buoyancy self-elevating type multi-metal nodule transmission system and method |
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| CN116087036A (en) * | 2023-02-14 | 2023-05-09 | 中国海洋大学 | Device for identifying images of sediment plume of deep sea mining and image analysis method |
| CN116087036B (en) * | 2023-02-14 | 2023-09-22 | 中国海洋大学 | Device for identifying images of sediment plume of deep sea mining and image analysis method |
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| CN117572430B (en) * | 2024-01-12 | 2024-05-10 | 自然资源部第二海洋研究所 | Mining plume redeposition thickness area detection device and method |
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