220 results about "Deep sea mining" patented technology

The invention relates to the technical field of deep-sea mining, and discloses an extrusion rotary type deep-sea multi-metal nodule low-disturbance collecting device which comprises a set of skid mechanisms formed by all-terrain skid plates arranged side by side, all-terrain skid plates are connected with direction skid through steering pull rods, each skid mechanism is provided with a grating storage cabin, and the grating storage cabins are connected with the all-terrain skid plates through steering pull rods. The inlet end of each grid storage bin is connected with a grid pressing shovel installed on the skid mechanism through a rotary collecting head. According to the invention, the all-terrain skid plates are used as walking mechanisms, so that low-disturbance advancing can be realized on one hand when the multi-metal nodules are collected by walking, and on the other hand, the advancing direction and operation attitude can be adjusted in real time by the cooperation of the multiple groups of all-terrain skid plates, so as to meet different collection requirements of the multi-metal nodules; meanwhile, a combined structure of the grating pressing shovel, the rotary collection head and the grating storage cabin is taken as a core, so that the multi-metal nodule in a buried or semi-buried state can be shoveled up in a low-disturbance manner, and environment-friendly collection is realized.

The invention discloses a deep-sea mining area sediment plume dynamic monitoring system and a multi-module fusion analysis method thereof, and belongs to the technical field of deep-sea environment monitoring and ocean engineering. The system comprises a fixed monitoring unit and a movable monitoring unit, the fixed monitoring unit is composed of an in-situ optical and three-dimensional sonar observation base station, a sediment capturer array and a multi-parameter sensor array and is arranged in a mining area; and the mobile unit comprises an AUV (Autonomous Underwater Vehicle) carrying a multispectral laser radar and an ROV (Remote Operated Vehicle) carrying a binocular vision system and a micro sampler. According to the analysis method, a plume motion field is extracted through multi-source data fusion, dark channel defogging and a pyramid optical flow method, a physical-data dual-drive model is constructed to simulate the plume diffusion and settlement process, a three-dimensional dynamic thermodynamic diagram is generated in real time, and an intelligent early warning threshold value is set based on the diffusion radius and the settlement flux. According to the invention, plume multi-scale, high-precision, real-time and dynamic monitoring and evaluation are realized, and deep-sea mining operation optimization and environment compliance supervision are effectively supported.

The invention discloses a global cost optimization method based on deep-sea mining operation system safety. The method comprises the following steps: determining design parameters of each system based on global cost optimization and a coupling relationship between the systems; materials are selected based on light load-stability, a self-cleaning nozzle is carried, and a crawler walking system is optimized; a two-way hydraulic-pneumatic energy conversion mechanism is used for optimizing a buoyancy compensation system; a hybrid power efficiency optimization algorithm is adopted to optimize a water surface support system based on a safety burden mitigation technology; a planetary gear is used for amplifying torque, and an electrolyzed water trigger type release mechanism is adopted in the laying and recycling process, so that a laying and recycling system is optimized; based on the principle of low energy consumption, a three-axis IMU data fusion technology is applied, and a three-degree-of-freedom active-passive combined heave compensation system is optimized; the method can effectively solve the problem of high cost of deep-sea mining, realizes safety, burden reduction, cost reduction and benefit increase of a deep-sea mining system, and optimizes the global cost of deep-sea mining operation.

The invention discloses a relay bin device capable of intelligently detecting and adjusting the mineral height and a deep-sea mining system.The relay bin device comprises a relay bin, a height adjusting unit, a detecting unit and a self-cleaning unit, the height adjusting unit comprises a shell assembly, an air bag assembly and a piston assembly, the shell assembly is arranged in the relay bin, and the air bag assembly is arranged in the relay bin; the air bag assembly is arranged in the shell assembly, a high-pressure air chamber is formed in the air bag assembly, the movable end of the piston assembly extends into the high-pressure air chamber and is in sealed sliding connection with the high-pressure air chamber, and the movable end of the piston assembly can move up and down in the axial direction of the relay bin by inflating and deflating the high-pressure air chamber so as to adjust the height of mineral particles; the detection unit comprises a high-pressure waterproof radar and a high-pressure waterproof ultrasonic sensor, and the high-pressure waterproof radar and the high-pressure waterproof ultrasonic sensor are arranged on the two sides of a discharging port of the relay bin respectively; the cleaning end of the self-cleaning unit faces the high-pressure waterproof ultrasonic sensor and is used for cleaning the high-pressure waterproof ultrasonic sensor regularly.

The invention discloses a resource scheduling optimization method for a deep-sea mining comprehensive control system, relates to the technical field of deep-sea equipment automation and control, and fundamentally solves scheduling barriers caused by resource isomerism and task complexity in the deep-sea mining system by creating a virtual resource pool and an elastic task block. Attributes and states of various physical resources are packaged into a virtual resource pool with a unified service interface, so that a scheduling system does not need to pay attention to physical implementation details of the resources, the resources can be inquired, reserved and distributed only through a standardized interface, meanwhile, a macroscopic mining task is decomposed and defined as fine-grained elastic task blocks, and the resource utilization rate is improved. Each task block clearly declarates the required resource type, quantity and target position, the decoupling architecture enables the resource scheduling problem to be converted into the dynamic matching problem between the task blocks and the resource pools, and any task block can be quickly allocated to any resource pool with corresponding capability.

The invention discloses a novel multi-source disturbance quantity and multi-pump flow matching analysis method for a deep-sea mining vehicle. The method comprises the following steps that the lower limit value of the water diversion quantity at a collection head gap is set; determining the upper limit value of the flow of the mixture absorbed by the dredge pump; determining a lower limit value of the flow of the mixture absorbed by the primer pump; determining the lower limit value of the flow of the mixture absorbed by the dredge pump; determining the upper limit value of the flow of the mixture absorbed by the primer pump; according to a mass conservation method, the lower limit value of the water diversion amount at the gap of the collection head, the upper limit value and the lower limit value of the flow of the mixture absorbed by the dredge pump and the upper limit value and the lower limit value of the flow of the mixture absorbed by the water diversion pump, the water diversion amount at the gap of the collection head is drawn; and determining the flow range of the mixture absorbed by the dredge pump and the flow range of the mixture absorbed by the primer pump according to an envelope diagram of the flow of the mixture absorbed by the dredge pump and the flow range of the mixture absorbed by the primer pump. The defect that the pump flow matching performance of the mining vehicle is poor is overcome.

The invention relates to the technical field of composite armored cables, and discloses an intelligent sensing type photoelectric composite armored cable for deep-sea mining equipment, which comprises a cable core formed by twisting a plurality of power cable core conductors, an optical fiber communication unit, a medium conveying pipeline and an intelligent sensing unit, and an outer coating layer, tin-plated annealed copper wires and high-strength copper foil wires are arranged in a conductor of the power cable core, an insulation shielding layer is wrapped outside the conductor, the intelligent sensing unit integrates a plurality of optical fibers and optical fiber grating sensors, a loose structure is arranged outside the intelligent sensing unit, one intelligent sensing unit is used for monitoring strain distribution, the other intelligent sensing unit is used for monitoring temperature distribution, and other redundant optical fibers are used as redundant backups. A certain length of grid region interval is preset, distributed measurement along the length of the cable is realized, a sensing optical fiber in the intelligent sensing unit is connected to an optical fiber demodulator of a deck control room, a software system displays strain, temperature, vibration and form data of each point of the cable in real time, an alarm threshold value is set, and the structure is highly integrated and can adapt to a deepwater environment.

The invention provides a method of a deep-sea sediment particle sedimentation rate measuring device based on image processing. The method is used for accurately measuring terminal sedimentation velocities of non-spherical sediment particles with different particle sizes in a simulated deep-sea environment. A particle sedimentation track is dynamically captured through a high-precision image processing technology, and accurate measurement of the non-spherical particle sedimentation rate is realized by dynamically capturing the particle sedimentation track and combining morphological parameter correction and unsteady differential equation verification. According to the method, the limitation of the traditional spherical hypothesis is broken through, errors caused by form complexity are remarkably reduced, and high-reliability data support is provided for environment influence assessment of deep-sea mining activities.

The invention relates to the technical field of ocean resource development, in particular to a method for calculating vortex-induced vibration of a deep-sea mining riser under the action of internal waves. According to the method, velocity and acceleration distribution characteristics of a flow field are determined according to wave parameters such as amplitude and wavelength of ocean internal waves, and load input is provided for calculation of vortex-induced vibration of the deep-sea mining riser; the ocean internal wave flow field has remarkable particularity, is different from uniform flow and typical shear flow, and is unsteady non-uniform shear flow; based on the particularity of an ocean internal wave flow field, vortex-induced load distribution on a deep-sea mining riser under the action of a traditional wake flow vibrator model is obtained by improving the traditional wake flow vibrator model; according to the geometric nonlinear problem caused by the large slenderness ratio of the deep-sea mining super-long riser and the weak constraint characteristic of the deep-sea mining riser, the rigid body displacement and the elastic deformation of the riser are separately calculated by adopting a co-rotation coordinate method, so that the calculation efficiency is improved to meet the actual engineering requirements; the invention discloses a calculation method for vortex-induced vibration of a deep-sea mining riser under the action of ocean internal waves.

The invention relates to the technical field of deep-sea mining vehicle lightweight, and provides a deep-sea mining vehicle lightweight design method based on multidisciplinary optimization, which fully considers the complex relation of mutual coupling among multiple disciplines, and realizes lightweight, low energy consumption and high reliability of a deep-sea mining vehicle. Comprising the following steps: S100, establishing a simplified model of the deep-sea mining vehicle; s200, in consideration of structural mechanics and material science, materials with smaller mass are selected to carry out material optimization on the deep-sea mining vehicle under the condition that the structural strength is met; s300, structural mechanics and fluid mechanics are considered, the component size and the water resistance coefficient are reduced under the condition that the structural strength is met, and structural optimization is conducted on the deep-sea mining vehicle; and S400, the reliability of the obtained lightweight deep-sea mining vehicle is ensured.

The invention provides a deep-sea mining umbilical cable truncation model experiment device and method.The deep-sea mining umbilical cable truncation model experiment device is characterized in that motion control equipment is installed on the upper portion of a water tank, and the two ends of an umbilical cable model are fixedly connected with the motion control equipment and base position adjusting equipment in a one-to-one correspondence mode through hydrodynamic monitoring equipment; the configuration optical monitoring device is installed on the base position adjusting device, and the umbilical cable model is located in an ocean engineering pool. The motion control device is used for driving one end of the umbilical cable model to move. The hydrodynamic monitoring device is used for measuring the top tension and the bottom tension of the umbilical cable model. And optical monitoring equipment is configured to detect the overall displacement of the umbilical cable model. The base position adjusting device is used for adjusting the horizontal distance between the bottom end and the upper end of the umbilical cable model. The acquisition of the overall displacement and top and bottom tension of the umbilical cable model is facilitated, and data support is provided for deep-sea mining.

The invention provides a deep-sea mining hydraulic lifting pipeline concentration monitoring method and system, and belongs to the field of deep-sea mineral resource development and detection. According to the application, a transfer learning neural network model is constructed by adopting indoor model experiment data and a small amount of field measured data, and a full-closed-loop system from indoor laboratory pre-training to deep sea online accurate concentration measurement is formed by fusing a multi-scale convolutional network, a multi-head attention mechanism and a transfer learning algorithm; therefore, the purpose of remarkably improving the real-time monitoring precision is achieved. The deep-sea mining hydraulic lifting pipeline concentration monitoring system comprises a source domain data construction and model pre-training subsystem used for constructing a land source domain data set and generating pre-training model parameters. And the target domain data acquisition and online migration monitoring subsystem is used for acquiring deep sea target domain data and loading pre-training parameters to execute online monitoring.

The present application relates to the technical fields of deep-sea mining, and particularly relates to a closed deep-sea mineral lifting system, which comprises a sea platform, the sea platform having a first mineral-water separation device and a high-pressure water pump in communication with each other; a circulating pipeline, one end of the circulating pipeline being in communication with the high-pressure water pump, and the other end of the circulating pipeline being in communication with the first mineral-water separation device; a water inlet assembly, the water inlet assembly being in communication with the circulating pipeline; a relay platform, the relay platform being capable of being suspended in seawater, and the relay platform being provided with a storage bin; a water pumping assembly, the water pumping assembly being in communication with the storage bin, and the water pumping assembly being used for discharging seawater in the storage bin into the sea; a mining assembly, the mining assembly being in communication with the storage bin; and a feeding assembly, the feeding assembly being arranged between the storage bin and the circulating pipeline, and the feeding assembly being in communication with the circulating pipeline, and the feeding assembly being used for injecting mineral slurry in the storage bin into the circulating pipeline. The present application can realize efficient lifting of minerals, and reduce the influence on the marine ecology.

The invention relates to the technical field of deep-sea mining equipment, in particular to a deep-sea mining vehicle with a plume prevention and control treatment function, the deep-sea mining vehicle comprises a vehicle main body, a shielding assembly, a cyclone separation assembly and an enrichment backfilling assembly, a crawler belt is arranged at the bottom of the vehicle main body, and a crushing mechanism is arranged at the front end of the vehicle main body; the shielding assembly comprises a front shielding plate, a side shielding plate and a rear shielding plate, the front shielding plate is arranged at the crushing mechanism, the side shielding plate is arranged on one side of the crawler belt, and the rear shielding plate is arranged at the tail end of the vehicle body; the cyclone separation assembly comprises an overflow pump, a flow guide pipeline, a cyclone front conveying pipeline, a first-stage cyclone, an inter-cyclone conveying pipeline and a second-stage cyclone, the overflow pump generates negative pressure to adsorb plume shielded by the shielding assembly, and the plume is conveyed to the cyclone front conveying pipeline through the flow guide pipeline; then, the gas flows through the first-stage cyclone for primary cyclone separation, and then flows through the second-stage cyclone for secondary cyclone separation through the conveying pipeline between the cyclones after separation.

Crushing and feeding equipment and deep-sea mining and transport system [Solution] The crushing and feeding device of the present invention includes a main body and a hydraulic motor, the main body having at least one roller inside, the roller fitted onto a corresponding roller shaft, the roller shaft rotatably connected to the main body, at least three identical disc blades spaced equally apart in the axial direction of the roller, each disc blade having at least one cutting edge, plugs provided on both the front and rear vertical surfaces of the main body, the plugs fitting into the gap from the roller to the vertical surface of the main body, and the power output shaft of the hydraulic motor connected to the roller shaft. The deep-sea mining and conveying system of the present invention includes a relay station, a mixed-flow pump, a lifting pipe, and a mother ship, the relay station including a supply barrel, a supply pipe, and the crushing and feeding device connected in order from top to bottom, the lower opening of the supply pipe connected to the lifting pipe.

The application discloses a deep-sea mining system bunker device with water inlet at the bottom, and relates to the field of deep-sea mining.The technical scheme of the application comprises a bunker room;the lower part of the inner wall of the bunker room is a conical surface structure with a large upper part and a small lower part;the top of the bunker room is vertically provided with a riser pipe, the lower end of the riser pipe extends to the inside of the bunker room, the upper end of the riser pipe extends to the upper part of the bunker room and is connected with a storage room;the top of the bunker room is provided with a feeding opening, the feeding opening is located at one side of the riser pipe, the feeding opening is connected with a feeding pipe, the feeding pipe is provided with a first valve and a second valve, and a storage space is arranged between the first valve and the second valve;the bottom of the bunker room is provided with a lower bunker opening corresponding to the riser pipe, the lower bunker opening is connected with a transition pipe, and the lower part of the transition pipe is connected with a water outlet and a water inlet.The application can conveniently add minerals into the bunker room, and the minerals will not flow out during the injection process, the lower part of the conical surface structure of the inner wall of the bunker room can make the mineral particles gather in the lower bunker opening, and the upward water flow can easily lift the mineral particles.

The invention relates to the technical field of deep-sea mining equipment, and provides a deep-sea mining equipment design system based on an improved genetic algorithm, which can improve the design efficiency and accuracy of deep-sea mining equipment, simplify the coupling strength between subjects, and improve the optimization efficiency while ensuring the accuracy. Comprising a data input layer, a subject decoupling layer, an optimization analysis layer, an intelligent solving layer and an operation interaction layer.

The present invention discloses an alternating step-by-step deep-sea mining system and method based on a clean energy platform, which relates to the field of deep-sea mining technology. The platform includes a main hull, a mining system, an anchoring system, and an electric propulsion device. A workshop is provided in the middle of the main hull. The mining system includes several mining vehicles, which are placed in the workshop. The anchoring system includes a winch, an anchor cable compartment, an anchor cable, and an anchor head. Winches are provided at the four corners of the top of the main hull. An anchor cable compartment is provided below each winch. One end of the anchor cable is connected to the winch, and the other end is connected to the anchor head. The electric propulsion device is provided at the front and rear ends of the bottom of the main hull. Compared with traditional deep-sea mining platforms, the anchoring system and electric propulsion device proposed in the present invention can make the platform advance in an alternating step-by-step manner through the cooperation of the two, and has better wind and wave resistance capabilities, while saving energy.

The invention provides a method for offshore smelting and processing of deep-sea nickel-cobalt-manganese polymetallic ore, and relates to the field of deep-sea mineral resource development. The method comprises the following steps: crushing, grinding and pulping the deep-sea nickel-cobalt-manganese polymetallic ore to obtain raw ore pulp; mixing the raw ore pulp with sulfuric acid to obtain a mixture, and carrying out high-pressure acid leaching with step-by-step heating on the mixture to obtain high-temperature and high-pressure acid leaching pulp; the high-temperature and high-pressure acid leaching ore pulp is subjected to step-by-step depressurization flash evaporation concentration, and concentrated ore pulp is obtained; carrying out solid-liquid separation on the concentrated ore pulp to obtain a leaching solution and leaching residues, precipitating nickel, cobalt and manganese in the leaching solution, and carrying out solid-liquid separation to obtain a nickel-cobalt-copper enrichment and a post-precipitation solution. According to the method, ore is subjected to rough smelting processing on the sea, only target components are recycled, enriched and transported back to the land for smelting, the transportation amount is reduced, most useless components are backfilled to the seabed after being cured, and the seabed after deep sea mining can be repaired easily.

The invention relates to the technical field of deep-sea mining, and discloses a deep-sea mining and carbon dioxide sequestration integrated system which comprises a floating platform provided with a low-temperature carbon dioxide gas storage tank and an ore storage box; the relay bin is used for storing substances; one end of the first conveying pipe is communicated with the low-temperature carbon dioxide storage tank, and the other end is communicated with the relay bin; one end of the second conveying pipe communicates with the ore storage box, and the other end communicates with the relay bin; the lifting pump is arranged on the second conveying pipe; the ore collecting device is used for collecting ore; one end of the conveying device communicates with the relay bin, the other end of the conveying device is detachably connected with the ore collecting device, and when the conveying device is connected with the ore collecting device, the conveying device is used for inputting the liquid carbon dioxide into the ore collecting device; and the carbon dioxide sealing and storing device communicates with the relay bin and is used for curing the carbon dioxide when the ore collecting device is connected with the conveying device. The system provided by the invention can meet various use requirements.

The application discloses a kind of based on flow pattern recognition's deep sea mining multiphase flow particle delivery prediction and regulation method, the method includes: by acquisition equipment periodic acquisition pressure in pipeline, flow, bubble or droplet volume fraction, solid particle volume fraction in different positions;According to pipe diameter and the gas-liquid ratio obtained by calculation, mixed flow velocity, call pre-built flow pattern division algorithm, distinguish bubble flow, slug flow, vortex, annular flow;Solve the gas-liquid discrete unit volume fraction of any diameter in different flow patterns;According to the gas-liquid discrete phase volume fraction, obtain the delivery speed of solid particles in multiphase flow;Whether the solid particle delivery speed obtained is judged to reach the best interval, according to the result control multiphase flow in pipeline flow pattern or gas-liquid ratio, to adjust the delivery speed of solid particles.The present application can improve the efficiency of seabed mineral exploitation, and avoid the dangerous flow pattern formed by unreasonable gas-liquid distribution ratio, efficiency and safety are taken into account.

The deep-sea mining system comprises a mining device, a mining ship, a transfer device and a transport ship, the mining device comprises a walking assembly, a crushing assembly, a spray head assembly and a collecting assembly, the crushing assembly, the spray head assembly and the collecting assembly are all arranged on the walking assembly, the walking assembly is used for walking in deep sea, and the collecting assembly is used for collecting the spray head assembly. The crushing assembly is used for crushing the seabed sediments, the spray head assembly is used for spraying the crushed seabed sediments so that the crushed seabed sediments can be flushed into the collecting assembly, the mining ship is used for collecting the seabed sediments, and the transferring device is connected with the collecting assembly and the mining ship. The transport ship is suitable for floating on the sea surface, the mining ship is matched with the transport ship, and the transport ship can move on the sea surface relative to the mining ship, so that the submarine sediments on the mining ship can be transported through the transport ship. The deep-sea mining system has the advantages of low cost, high mining efficiency and the like.

The invention discloses a multi-spiral synergistic coupling type mixer for deep-sea mining, and relates to the technical field of mixers, the multi-spiral synergistic coupling type mixer comprises: a housing having a feed inlet for feeding and a discharge outlet for discharging; the spiral cutting blade is rotationally arranged at the front part in the shell and is positioned at the feeding hole; the bionic tooth spiral sheet is rotationally arranged at the front part in the shell and is positioned at the feeding hole; and the bionic fin spiral sheet is connected to the end parts of the spiral cutting blade and the bionic tooth spiral sheet and is rotationally positioned at the rear part in the shell, so that the crushed materials are discharged through the discharge port. According to the invention, a three-spiral cooperative crushing structure with an equilateral triangle layout is adopted, the bionic tooth spiral sheets realize primary crushing through extrusion, the spiral cutting blades perform secondary fine crushing, and the graded crushing design ensures that minerals are fully crushed; and the retention time and the contact area of the materials in the cavity are increased through cooperative rotation of the three helixes, so that the crushed minerals are uniformly mixed with a conveying medium, and the subsequent separation and purification efficiency is improved.

The abrasive water jet spray head device for assisting deep-sea mining comprises a mixing cavity, an accelerating cavity, a developing cavity, a diffusing cavity, an abrasive inlet pipe, a rotational flow plate and a mixer, the mixer comprises a shell, a clockwise-rotating annular propeller, a counter-rotating annular propeller and a bipolar counter-rotating mechanism, and external high-pressure inflow water can directly enter the mixing cavity; abrasive materials can enter the mixing cavity through the abrasive material inlet pipe, the bipolar counter-rotating mechanism can drive the clockwise-rotating annular propeller and the counter-rotating annular propeller to rotate in different directions, the mixing degree of abrasive material water jet flow is improved, then the abrasive material water jet flow enters the accelerating cavity, the abrasive material water jet flow is accelerated through the gradually-shrinking structural design, and the crushing capacity is enhanced; after abrasive water jet enters the development cavity and the diffusion cavity, secondary mixing enhancement is achieved, meanwhile, four rotary outlets are formed through internal rotational flow plates, finally, four clusters of rotary jet can be sprayed out, and during mining operation, the abrasive water jet has excellent diffusion mixing performance and entrainment performance, and disturbance to the environment is reduced.

The application discloses a kind of autonomous operation methods of deep-sea mining car, and mining car is equipped with sonar sensor, camera sensor and control unit.Through sonar, three-dimensional point cloud information of seabed operation area is obtained, and synchronous positioning and map construction are carried out in combination with vehicle pose, to form global point cloud map;Based on the map, cubic surface fitting is carried out on seabed topography, to generate continuous three-dimensional curved surface model;Through camera, seabed image is collected and sulfide target is identified, in combination with camera calibration parameter, vehicle real-time pose and curved surface model, two-dimensional target information is mapped to global coordinate system, to obtain target three-dimensional space position;Construct the grid map containing sulfide target distribution and operation state mark, generate target-oriented mining operation path, and control mining car to execute mining operation;After operation is completed, detection and identification are carried out again using sonar and camera, and operation completion state is updated.The application improves target positioning accuracy, path planning efficiency and autonomous operation ability in deep-sea mining.

The present application belongs to the technical field of deep-sea mining, and discloses an artificial nodule laying device and method for deep-sea mining, which is arranged on a mining robot and moves with the mining robot; the device comprises: a bearing main body connected to the mining robot, the bearing main body carrying a plurality of artificial nodules; an identification unit connected to the bearing main body, used for scanning a seabed area after mining to obtain coordinates and size parameters of a pit formed after mining; and a material moving mechanism connected to the bearing main body and in communication connection with the identification unit, the material moving mechanism being configured to transfer and drop the artificial nodules from the bearing main body into the pit, and the artificial nodules in the pit being capable of being converted into a natural-like multi-metallic nodule. The present application can not only repair damaged seabed topography formed by mining in real time, but also restore a natural nodule hard matrix habitat, so as to realize in-situ repair of seabed topography and long-term ecological compensation in the process of deep-sea mining.

The present application belongs to the technical field of deep-sea mining equipment, and provides a step-by-step seabed mining vehicle and a use method thereof. The mining vehicle comprises: a traveling unit having a first truss and a second truss that can slide relative to each other, for supporting and walking of the mining vehicle on the seabed; a mining unit arranged below the second truss, for collecting seabed minerals; a transfer unit connected to the mining unit at one end, for transferring seabed minerals; a temporary storage unit arranged above the second truss and connected to the other end of the transfer unit, for temporarily storing seabed minerals; and a motion control unit for providing power to the traveling unit, the mining unit and the transfer unit and controlling the operation thereof; wherein the first truss and the second truss can be alternately supported on the seabed, so as to realize step-by-step walking of the mining vehicle on the seabed through the relative sliding of the first truss and the second truss. Compared with a caterpillar-type seabed mining vehicle, the mining vehicle can walk on the seabed in a step-by-step manner, greatly reducing seabed disturbance and plume, and reducing the influence on the seabed environment.

The invention provides a divided-flow type deep-sea mining tail water discharge plume suppression device which comprises a suppression device shell, the suppression device shell comprises a three-way inlet pipeline and two outlet pipelines, one passage of the inlet pipeline serves as a device inlet, and the other two passages of the inlet pipeline are connected to the outlet pipelines respectively; the outlet pipeline is inclined towards the inner side; a bolt assembly used for being connected with a tail water discharging pipeline is installed on the inlet pipeline and serves as a passage opening of a device inlet. A fixed support is fixedly installed at an outlet of the outlet pipeline, a plurality of axial installation holes are formed in the fixed support, a flow guide cylindrical pipe is fixedly installed in each axial installation hole, and the multiple flow guide cylindrical pipes are installed in the outlet pipeline. According to the invention, the diffusion volume of the plume particles is 84.1% of that of the plume particles without the inhibition device, the diffusion area of the cross section is 89.4% of that of the plume particles without the inhibition device, and the diffusion of the plume can be effectively reduced.