518 results about "Sediment" patented technology

The invention discloses an indoor water tank sediment starting speed measurement system and method, and aims to solve the technical problem that data accuracy is affected due to the fact that a sensor disturbs a flow field in an existing measurement method. The core of the technical scheme is that the non-contact measurement characteristic of the PIV technology is applied to the whole process from flow field construction to data acquisition. The device is mainly composed of an imaging unit, a laser lighting unit, a movable sliding frame, a water flow adjusting unit and a buffer plate. Optical measurement is carried out through the imaging unit and the laser illumination unit, a physical sensor does not need to be arranged in a flow field, and interference of a measuring instrument on a water flow structure and a sediment starting process is fundamentally avoided. The movable sliding frame which is integrally designed integrates the functions of sediment laying, particle throwing and measuring, so that a test area can be quickly positioned; and the buffer plate and the water inlet and drainage adjusting unit are combined, so that a gradually-changed flow field from weak to strong can be accurately and stably simulated.

The invention relates to the technical field of hydraulic engineering safety monitoring, in particular to a safety monitoring method and system for a flood discharge and sand flushing service gate. The method comprises the steps that a super-strong permanent magnet sensor is installed on an underwater flood discharge and sand flushing service gate, and the magnetic attraction strength of the super-strong permanent magnet sensor is controlled according to real-time water flow; when the real-time water flow is larger than the preset water flow high threshold value, the magnetic attraction strength is enhanced; if the water flow is lower than the preset water flow high threshold value, the magnetic attraction strength is recovered to the standard magnetic attraction value; the ultra-strong permanent magnet sensor monitors vibration state data and dynamic stress data of each structure in the operation process of the underwater flood discharge and sand flushing service gate; obtaining a rigidity evaluation value and a dynamic stress safety evaluation value of the underwater flood discharge and sand flushing service gate; and performing evaluation in combination with the characteristic data in the operation process of the underwater flood discharge and sand flushing service gate to obtain the safety coefficient of the current underwater flood discharge and sand flushing service gate. The stability of the gate is dynamically enhanced, the magnetic attraction strength is matched with water flow impact in real time, and high-flow-speed loads are effectively resisted.

The invention provides a deep-sea rare earth deposit mine collecting car and an operation method thereof. According to the method, a double-S-shaped reciprocating collection path is planned through an intelligent controller on the basis of a mining vehicle carrying a multi-stage collection device and aiming at the characteristic that deep sea rare earth is enriched in a sheet and multi-layer mode. According to the difference between the depth and compactness of the sediments, three stages of cutter suction units are adopted for layered collection: the first stage is used for 0-2m surface soft sediments, and the rotating speed of a reamer is 200-400r / min; the second stage is used for 2-4m middle-layer compact sediments, and the rotating speed is 350-600r / min; the third stage is used for 4-10m deep high-strength sediment, and the rotating speed is 500-700r / min. The terrain, posture and pressure are monitored in real time during operation, the posture, speed and obstacle avoidance of the vehicle body are automatically adjusted, and stable collection is achieved. The method has the advantages of accurate layering, comprehensive coverage, small environmental disturbance and high reliability, and is suitable for efficient, safe and environment-friendly collection of deep sea rare earth deposits.

Provided is an environment-friendly mobile collecting box for decoration cutting dust. The mobile collecting box comprises a box body, wherein a water tank is fixedly mounted on one side of the bottomsurface of the inner wall of the box body, the bottom surface and the outer side of the water tank are fixedly connected to the inner wall of the box body separately, the inner side of the water tankis fixedly connected to one side of the box body, and openings are formed in the top surface and the other side of the box body; a first through hole is formed in the bottom of the inner side of theinner wall of the water tank, a switching valve is disposed in the first through hole, and a second through hole is formed in one side of the box body; the interior of the first through hole communicates with the interior of the second through hole, and the second through hole communicates with the interior of the box body; the top surface of the water tank is fixedly connected to one end of a hose, and the other end of the hose is arranged in the box body, and a floating plate is fixedly mounted on the periphery of the other end of the hose. Sediment in the box body can be pushed directly into the garbage bag through cooperative use of a mud box and a garbage bag, and the mud box can be taken and placed freely; after the mud box is taken out, a sealing cap of the garbage bag containing the sediment is removed, and after the garbage bag is replaced by a new garbage bag, the mud box is put back, and the sediment is not in contact with the mud box, and cleaning of the mud box by a user is not needed, so that time and labor are saved.

The application relates to the technical field of sediment sampling, and discloses a river water environment treatment and improvement device, which comprises a fixing frame, the inside of the top end and the bottom end of the fixing frame is provided with a sliding rail, the inside of the sliding rail is provided with a sampling assembly for collecting sediment, the sampling assembly comprises a bottom support column, the bottom support column is in sliding connection with the sliding rail, the top of the bottom support column is fixed with a supporting rod, the top of the supporting rod is fixed with a sampling cylinder, the surfaces on the two sides of the sampling cylinder are fixed with connecting blocks, the river water environment treatment and improvement device can intercept garbage and sundries in the sediment in the water body through a filter screen, the probability of garbage entering the inside of the sampling cylinder is reduced, the water flow is limited through the conical pipe shape, the water body shunted by the filter screen can be recombined, a certain flow rate can be maintained to wrap the sediment and enter the inside of the sampling cylinder, the precision of sampling sediment is improved, and the efficiency of water environment treatment is effectively improved.

The application discloses an indoor water tank sediment starting speed measurement system and method, and aims at solving the technical problem of sensor disturbance to a flow field and influence on data accuracy in the prior art measurement method.The technical scheme core is that the non-contact measurement characteristics of the PIV technology are applied to the whole process from flow field construction to data acquisition.The device is mainly composed of an imaging unit, a laser illumination unit, a movable sliding frame, a water flow adjusting unit and a buffer plate.Optical measurement is performed through the imaging unit and the laser illumination unit, and physical sensors do not need to be arranged in the flow field, so that the interference of the measuring instrument on the water flow structure and the sediment starting process is fundamentally avoided.The integrated movable sliding frame integrates the sediment laying, particle throwing and measurement functions, and is convenient for quickly positioning a test area;in combination with the buffer plate and the water inlet and drainage adjusting unit, a gradually changing flow field from weak to strong can be accurately and stably simulated.

The invention discloses a method for non-intrusive detection of pipeline sediments through a sound wave array, and belongs to the technical field of sound wave detection. The invention discloses a method for non-intrusive detection of pipeline sediments by a sound wave array. The method comprises the following steps: step 1, mounting a plurality of sensor groups on a detected pipeline in sequence; 2, acquiring historical flow velocity data and historical sound velocity data of each detection point of the detected pipeline under the deposition-free working condition through a sensor group; and 3, monitoring the flow velocity data of each detection point in real time according to each sensor group, comparing the flow velocity data monitored in real time with historical flow velocity data, and judging the deposition state of each detection point. According to the invention, the sonic sensor arrays distributed along the circumferential direction and the axial direction of the pipeline are adopted, and synchronous, in-situ, non-intrusive and real-time high-precision measurement of the sediment thickness, the three-dimensional space distribution form and the medium flow velocity is realized on the premise that the operation of the pipeline is not interfered.

The invention relates to the technical field of water environment monitoring and water ecological protection, solves the technical problem that hydrology, water quality, vegetation and bottom mud monitoring are mutually dispersed and are difficult to correspond in the prior art, and particularly relates to a lakeside microenvironment composite monitoring pile and an ecological disturbance evaluation method. The composite monitoring piles sequentially comprise an overwater area, a variable water level zone monitoring area and an underwater area in the vertical direction, the bottoms of the composite monitoring piles are fixed to bottom mud, the multiple composite monitoring piles are arranged according to the water depth gradient of 0-20 cm, 20-50 cm and 50-100 cm, a hydrodynamic force disturbance index and a microenvironment response index are established by comparing base line and disturbance working condition monitoring results, a composite ecological disturbance index is established, and the water level zone monitoring area and the water level zone monitoring area are located in the bottom mud. The method is used for quantitatively evaluating lakeside disturbance intensity and engineering measure effects. According to the method, quantitative and graded evaluation of the ecological disturbance degree of the lakeside zone is realized, and a scientific basis is provided for lakeside zone revetment form optimization, ecological restoration measure arrangement and water function zone management.

The invention discloses a sediment collection and supply integrated device for offshore wind turbine pile foundation scour prevention, which is arranged around the periphery of an offshore wind turbine single pile foundation, relates to the technical field of offshore wind power engineering, and comprises an annular sand collection unit, a sand storage unit, a sand unloading unit and a sand supply guide unit which are communicated from top to bottom; the annular sand collecting unit guides sediment in ocean current to be deposited and collected, the sand storage unit receives and stores the collected sediment, and the sand unloading unit can seal a bottom outlet of the sand storage unit in an opening and closing mode; the sand supplementing guide unit directionally guides the discharged silt to the scouring pit; the mechanical triggering unit and the elastic resetting unit are used for opening and resetting the sand unloading unit. Sediment carried by ocean current is utilized, through pure mechanical passive operation, integrated self-circulation of collection, storage, triggering, release and supply of the sediment is achieved, external energy is not needed, the self-adaptive adjusting capacity is achieved, and the construction and operation and maintenance cost is remarkably reduced.

The invention relates to the technical field of intelligent sampling, in particular to an unmanned aerial vehicle water sediment intelligent sampling method and system based on rotational flow sorting, and the method comprises the following steps: collecting disturbance trajectory and rotational flow data, identifying a stable inlet, screening an alignment interval, executing screen mesh alignment, and generating a sampling record. According to the method, stable section calibration is formed by superposing wind speed direction fluctuation and rectifying plate track change, the screening range is locked to an alignment interval in combination with multi-parameter mapping of the rotating speed and the particle density, and the sediment movement state is captured in a layered mode in a deposition layer through a screen; a whole-process sampling sequence is constructed by a collaborative time sequence of rectification action and screen operation, so that real water disturbance characteristics can be dynamically extracted, sediment movement rules can be matched, the sampling trigger response accuracy is improved, and the screening alignment precision under multi-factor coupling is enhanced; the target section is accurately captured under the interlaced interference of the airflow disturbance and the particle settling process, and the particle layered structure is stably kept.

The invention discloses a silty silt seabed critical start calculation method considering seabed liquefaction influence, and belongs to the technical field of silt dynamic simulation and calculation. The method comprises the following steps: firstly, acquiring wave parameters such as wave height, period and water depth, and calculating a characteristic Reynolds number based on a Stokes wave theory; in combination with field observation or indoor test data, the liquefaction grade is calculated through an empirical function, and the bed state is divided; then according to the liquefaction grade, the sediment erosion coefficient and the critical starting stress are corrected in an index form; and finally, correcting empirical coefficients by using field and indoor data, and constructing a regional correction coefficient table. The method can accurately reflect the influence of liquefaction on sediment starting, the accuracy of the calculation result is improved compared with that of a traditional method, the method can adapt to different sea area environments, operation is easy and convenient, and a reliable basis is provided for offshore engineering design and sediment movement prediction.

The invention discloses a salt mine sediment void petroleum and brine migration simulation and parameter optimization evaluation method, which comprises the following steps: obtaining physical characteristic parameters of salt mine sediment, petroleum and brine, the sediment parameters at least comprising void ratio and pore connectivity obtained through CT scanning; calculating an evaluation index based on a simulation result, and performing quantitative evaluation and feasibility screening on the migration process; if the optimal potential exists, parameter optimization and scheme iteration are further executed, and a simulation-evaluation-optimization closed loop is formed; and finally, checking the model through field test data. The method solves the problem that in the prior art, no means for simulating and evaluating the two-phase migration of the petroleum brine in the salt mine sediment gaps exist, the process can be quantitatively simulated, evaluated and optimized, and scientific, accurate and systematic technical support is provided for petroleum storage through the high-impurity salt mine sediment gaps.

The present invention relates to the technical field of sediment or sludge treatment of a water body, and provides a solidification material and a use thereof. The solidification material consists of the following components in percentage by mass: 30% of a sediment flocculant, 20% of a high-strength and high-water-resistant earth consolidator, 30%-40% of calcium bentonite, 5%-15% of a clay mineral, and 5% of an engineering admixture. When the solidification material is used in the sediment or sludge treatment of the water body, pollutants in sediments can be well immobilized, and as tested, no leaching of the pollutants occurs after immersion in the water body. Moreover, the usage amount of the solidification material is significantly reduced compared to that of a conventional solidification material, so that the impact on the storage capacity of the water body can be effectively reduced, and the construction cost is also saved.

The invention discloses a reservoir capacity prediction method considering underlying surface change conditions, and aims to solve the problems that the prediction value of an existing scheme is too large, deviation exists between the estimated reservoir capacity and the actual reservoir capacity, the functions of flood control, water supply, irrigation and the like of a reservoir are affected, and the economic benefits of the reservoir are directly affected. The method comprises the following steps: acquiring actually measured water and sediment series data of a reservoir in historical periods, analyzing the reservoir water and sediment change trend, determining reservoir runoff and reservoir sediment abrupt change points in combination with underlying surface factor changes, dividing different stages of reservoir sediment change, and calculating soil erosion amounts of drainage basins above the reservoir in different stages. And converting the reservoir sand amount in the early stage into the reservoir sand amount under the current underlying surface condition by using the conversion coefficient, estimating the reservoir sand amount in the planning level year or the design level year, and analyzing the reservoir capacity curve in the future. The reservoir capacity prediction method achieves the effects of more accurately predicting the reservoir capacity, exerting the reservoir function, improving the reservoir benefit and avoiding the waste of engineering investment.

The invention discloses a ballasting deviation rectifying construction device for a rectangular pipe gallery in a soft soil stratum and a design method of the ballasting deviation rectifying construction device. The construction device comprises a ballasting device, a lifting device, a horizontal hole digging device and a sediment discharging device. The ballasting device lowers the high position of the pipe gallery through a counterweight measure, the lifting device limits the low position of a pipe joint, the horizontal hole digging device digs soil bodies on the inclined high position and the low side of the pipe gallery, and the silt discharging device transfers and discharges the soil bodies, squeezed into the pipe gallery, on the inclined high position and the low side of the pipe gallery in the ballasting process. The design method comprises correction work of the inclined pipe gallery, ground work arrangement and design checking calculation of a horizontal directional drilling scheme, and has the advantages that the excavation volume is reduced, the construction period is shortened, the water leakage risk is avoided, the construction effect can be ensured to reach an expected target through comprehensive evaluation and careful arrangement of construction devices, and the construction efficiency is improved through a horizontal directional drilling machine. And accurate drilling operation can be carried out according to actual construction requirements.

The invention relates to a hole bottom sediment thickness adaptive direction measurement method for irregular hole shapes. The method comprises the following steps: acquiring hole wall images and vertical distance data in multiple directions; image preprocessing is carried out, hole wall feature points are extracted, three-dimensional coordinates are converted, a dynamic three-dimensional model is fitted, deformation grades are divided, and an inclination angle is determined; preferentially distributing detection points in a serious deformation area, calculating an optimal angle, monitoring by a gyroscope, correcting by an electromagnetic damper, adjusting by a servo motor, and ensuring that an included angle between a probe axis and a hole bottom tangent line is compliant; transmitting multi-frequency ultrasonic waves according to deformation grades, analyzing reflected signals through wavelet transformation, extracting sediment layering characteristics, and calculating the distance from a probe to a layering surface through speed correction; the reference distance is calculated based on the reference coordinates, the sediment total thickness and the dense layer thickness are finally obtained, and the measurement method which is adaptive to hole wall deformation, eliminates interference, dynamically adjusts detection parameters and is accurate in reference positioning can meet the high-precision requirement of engineering for sediment thickness and compactness quantification.

The invention belongs to the technical field of river and lake bottom mud treatment, and particularly relates to a bottom mud dehydration method and device which comprises a treatment tank, a feeding pipe and a liquid injection pipe are arranged at the top end of the treatment tank, and the bottom end of the treatment tank is open; the treatment tank is provided with a precipitation cylinder in sealed connection, the bottom surface of the precipitation cylinder is fixedly connected with a group of fixing plates, and the fixing plates are fixedly connected with the treatment tank through bolts; an auxiliary electromagnet attracts a first gear to enable the first gear to be meshed with a second gear, at the moment, a connecting rod can be controlled to rotate forwards, so that the second gear drives the first gear to rotate, a lead screw can rotate to control a connecting ring to move downwards, and when the connecting ring is in a moving state, an oxidizing agent can be discharged in muddy water in a layered mode; therefore, the sufficient mixing of the oxidant in the bottom mud is improved, and the reaction rate is increased.

A method for building a 3D model of a reservoir includes defining a pre-sedimentation model comprising a bottom surface comprising a plurality of cells, and iterating a plurality of deposition modelling steps, including simulating deposition of a layer of sediments on the bottom surface or a previously-deposited layer of sediment, each layer corresponding to a determined period of time of sedimentation and comprising a plurality of cells, and computing petrophysical parameters associated to at least a cell of the generated layer. Simulating deposition of a layer of sediments includes introducing a plurality of particles within the model, simulating transport of the particles comprising moving a particle from one cell to another or depositing the particle, and generating a layer comprising a plurality of cells, each cell associated to a thickness of deposited particles. The petrophysical parameters are computed from mineral elements and sizes of the particles deposited in each cell.

The application discloses a rubber dam dynamic boundary simulation method and system based on a two-dimensional water-sediment dynamics model, relates to the technical field of water conservancy engineering numerical simulation and scheduling, and comprises the following steps: defining the internal interface and the virtual dam top elevation of the rubber dam; deciding the target state based on multi-element water-sediment data; smoothly adjusting the dam top height; in the flux calculation of the finite volume method, first, rotating the state quantity to the local coordinate system, comparing the water level with the dam top elevation and correcting the state variable: when the water level is lower than the dam top, the normal velocity is forced to be zero to simulate water retaining, and when the water level is higher than the dam top, the effective water depth and the sediment discharge are calculated based on the dam top; after solving the one-dimensional Riemann problem, the global flux is obtained by inverse rotation. The application realizes the continuous and automatic simulation of the rubber dam state without changing the terrain, and solves the problems of mass non-conservation and numerical instability of the traditional method.

The invention provides a device and a method for testing a local scouring model below a pipeline. The device comprises an organic glass plate cuboid model box, a cover plate, a limiting plate, a rubber ring, the pipeline, a side baffle, a water tank A, a water tank B, a deposition tank, a balance, a computer and a camera. Through collaborative design of a limiting plate and a cover plate, water flow only acts on a contact interface between the lower portion of the pipeline and a soil layer, disturbance of an upper streaming vortex-induced effect is effectively avoided, and precise simulation of local scouring below the pipeline is achieved; a water flow pipe winding phenomenon, a sediment migration and deposition process and pit flushing time evolution are observed in real time by virtue of a camera, and an evolution process of initial micro-pit formation, pit body expansion, gap generation, gap extension and pit flushing form stability is completely captured in combination with quantitative weighing of a balance and a computer; and accurate test data and theoretical support are provided for the anti-scouring design of the pipeline foundation.

The present application relates to a kind of based on normal dredging judgment method of exogenous particle input influence, based on the establishment of different depth dredging simulation and the control group of un-dredging of target area sediment;After simulating dredging, the environmental and target pollutant release condition of new sludge-water interface under different dredging depths are observed, and the content of each target pollutant in sediment is obtained;While detecting the content of each pollutant in control group;Target area water is observed, and the particle in target area water is captured, and the content of each pollutant in particle and the monthly sediment flux of particle are obtained;The content of pollutant under different conditions is compared, and the influence of exogenous pollution input on the new sludge-water interface is observed by simulation, to judge the influence degree of exogenous pollution input on environmental dredging effect, and whether it needs to carry out normal multiple dredging, to provide more accurate technical guidance for the continuous control of endogenous after environmental dredging implementation, improve the economic and environmental benefits of environmental dredging.

The utility model belongs to the field of collecting devices, and particularly relates to a silt dam deposited sediment sample collecting device which comprises a fixing seat, an inserting rod is in contact with the bottom of the fixing seat, a support is fixedly connected to the top of the fixing seat, and graduated scales are arranged at the left end and the right end of the support respectively. The outer side of the support is slidably sleeved with two symmetrically-distributed sliding sleeves, the outer sides of the sliding sleeves are fixedly connected with supporting blocks, and the bottoms of the supporting blocks are fixedly connected with a plurality of evenly-distributed positioning rods. Through the design of the positioning rod, the whole structure of the device can be positioned, the insertion rod and the fixing seat structure can be inserted into sediment through the insertion rod, the insertion depth of the insertion rod can be adjusted through the cooperation of the graduated scale, and then the insertion rod and the fixing seat can be separated by pressing the pressing rod downwards. At the moment, the silt can enter the insertion rod, and the purpose of collecting the silt at different depths can be achieved.

The invention discloses a hydrate-containing sediment exploitation fluid-solid output prediction method. The method comprises the following steps: carrying out reservoir mud and sand particle stress analysis; based on the moment balance principle, a judgment criterion of reservoir sand falling and migration under the hydraulic condition is established, and a reservoir mud and sand particle migration mathematical model is established in combination with reservoir mud and sand particle mass conservation; constructing a multi-field coupling model of hydrate reservoir fluid-solid output; discretizing the multi-field coupling model by adopting an unstructured grid technology, and carrying out decoupling solution by adopting an alternating iteration method; and on the basis of decoupling solution result data, a nonlinear mapping relation from the characteristic parameters to the gas production rate and the sand production rate is established by utilizing a deep learning model, a fluid-solid output prediction model is established, and accurate prediction of the gas production rate and the sand production rate is realized on the basis of the fluid-solid output prediction model. According to the method, the interaction mechanism between the gas production behavior and the sand production behavior of the reservoir can be disclosed more accurately, so that the fluid-solid production rule of the hydrate reservoir can be predicted more accurately.

The invention relates to the technical field of near-well region reservoir development, and particularly discloses a method for evaluating the permeability of pilot production near-well region reservoirs by drilling and production working fluid invasion, which comprises the following steps: selecting shallow surface layer muddy silt sediment and fine silt of a target sea area as media, and preparing an overlying stratum core and multiple groups of parallel cores with different porosity and water saturation; putting the sample tube into a holder with a nuclear magnetic cavity, introducing methane gas to generate hydrate, and monitoring pressure and nuclear magnetic signals to obtain a hydrate reservoir core; reversely injecting cold water to test the permeability before liquid phase invasion; injecting a microbial solution and a nutritive salt solution for culture and reinforcement, testing permeability before and after reinforcement, and analyzing the influence; drilling fluid, well completion fluid, reservoir transformation working fluid, transformation working fluid carrying permeation enhancing materials and ethylene glycol mining fluid are injected under the same conditions to simulate invasion, nuclear magnetic signals are monitored, the permeability after invasion is tested, and the damage degree before and after reinforcement and the anti-invasion effect are compared.

The invention discloses an undisturbed soil bulk density measuring method and measuring device based on sediment characteristics, and the undisturbed soil bulk density measuring method comprises the following steps: sampling undisturbed soil, putting the undisturbed soil into a measuring bottle, and injecting water to a standard water level to obtain a water-soil mixed solution and stirring; the measuring bottle is placed in an NFC induction area on the soil bulk density measuring table, an NFC chip sticker at the bottom of the measuring bottle is inducted, the induction time serves as the sedimentation starting time of soil particles in the measuring bottle, and the sedimentation starting time of the soil particles is transmitted to a data terminal to be recorded; moving the measuring bottle to other places for standing until the soil particles are completely deposited at the bottom of the container; the measuring bottle is placed in the NFC sensing area again to sense the NFC chip patch, the sensing time serves as the settling ending time of the soil particles, the laser distance measuring sensor is controlled to be started through the controller, and the distance between the upper surface of the wet sediment and the laser distance measuring sensor and the distance between the bottom of the measuring bottle and the laser distance measuring sensor are measured respectively; and transmitting the acquired data to a data terminal to calculate the volume weight of the undisturbed soil.

The utility model relates to the technical field of sediment content detection, and discloses sampling equipment for detecting sediment content of a water transportation channel, which comprises two grab buckets, connecting blocks are fixedly connected to the tops of the two grab buckets, cover plates are rotatably connected to the tops of the grab buckets, mounting blocks are slidably connected to the tops of the two grab buckets, and the mounting blocks are fixedly connected to the tops of the two grab buckets. The grab bucket comprises a grab bucket body, the grab bucket body comprises two mounting blocks, the tops of the two mounting blocks are fixedly connected with connecting rods, the two connecting rods are internally provided with driving rods, the mounting blocks are internally provided with mounting assemblies, the grab bucket body is internally provided with a weight increasing assembly used for increasing weight, and the grab bucket body is internally provided with a plurality of fixing assemblies used for fixing the weight increasing assembly. According to the grab bucket, the working efficiency of replacing the grab bucket is improved through matched use of the mounting assembly and the reset assembly, and the weight of the grab bucket can be adjusted through a series of matched work of the weighting assembly and the fixing assembly.

The utility model relates to the technical field of sediment sample collection, and discloses a practical device for collecting sediment samples of shallow rivers and lakes with the water depth of 10 meters, which comprises a fixed block and waterproof shells, a plurality of solar components are arranged on the outer side of the fixed block, and lifting components are arranged on the inner sides of the two waterproof shells. The bottom of one waterproof shell is fixedly connected with a hollow block, and a grabbing and clamping assembly is arranged at the bottom of the hollow block. The grabbing and clamping assembly comprises second electric push rods, the multiple second electric push rods are rotationally connected to the inner side of the hollow block, and the ends of the multiple second electric push rods are rotationally connected with connecting frames. According to the utility model, in the gripping assembly, the opening and closing of the connecting frame and the collecting hopper block can be accurately controlled through the electric push rod II, so that the collecting hopper block can be stably inserted into sediments and samples can be gripped. In the grabbing process, omission or loss of the samples can be effectively prevented through the closing mode of the collecting hopper block, and the integrity of the samples is guaranteed.

The invention belongs to the technical field of natural gas hydrate geological exploration and logging evaluation, and relates to a hydrate-containing sediment effective resistivity prediction and hydrate saturation inversion method based on a logic function form, and the method comprises the steps: obtaining rock physical basic data of a target reservoir or a to-be-tested sample; establishing an effective resistivity forward modeling model based on a logic function form; determining fixed parameters in the effective resistivity forward model and fitting parameters to be inverted according to geological features or experimental conditions of the target to be analyzed; an objective function is constructed, fitting parameters are optimized through an optimization algorithm, optimal model parameters are obtained, and a unary response equation of the effective resistivity about the hydrate saturation is established; and calculating the effective resistivity or hydrate saturation of the unmeasured points according to the determined response equation. According to the method, the description precision and prediction reliability of the resistivity response characteristics of the complex hydrate reservoir are remarkably improved, and a foundation is laid for reservoir saturation fine evaluation and efficient resource exploration and development.

The invention discloses a sediment-carrying water inrush material source layer identification method based on sedimentary environment attributes, and belongs to the technical field of coal mine water disaster prevention and control. The method comprises the following steps: firstly, collecting drilling core and logging data of an overlying stratum of a target coal seam, and extracting and quantifying sedimentary environment attributes such as a hydrodynamic condition, an oxidation-reduction environment and stratum sedimentary characteristics from the drilling core and logging data; the sedimentary microfacies are divided based on the attributes, and a corresponding relation model of sedimentary microfacies types and the bonding strength (weak, medium and strong) of the material source layer is established. And then, constructing a mining area sedimentary microfacies spatial distribution model, mapping the bonding strength relationship in the model, generating bonding strength three-dimensional distribution characteristics, and delineating different strength areas. And finally, comprehensively judging the silt and water inrush risk area in combination with the cementing strength distribution, the coal seam spacing and the development position of the water flowing fissure zone. According to the method, accurate and three-dimensional space identification of the erodible material source layer is realized from the deposition cause, and a scientific basis is provided for targeted prevention and treatment.

The invention discloses an automatic monitoring and cleaning system and method for distributed reservoir branch blocking door sand, and belongs to the technical field of water conservancy projects. The system comprises a distributed energy module, a water pumping and desilting module, a monitoring module, a gate dam regulation and control module and a control module. Energy is provided through photovoltaic and wind power generation, pumping and desilting are conducted through a pump station or a pump ship connected through a flexible pipeline, and a spiral spring or a spiral protrusion or other anti-blocking devices are arranged at a pump inlet. The monitoring module monitors the water level difference and the flow velocity in real time through a radar water level gauge and a flow measuring camera. The gate dam regulation and control module comprises an assembled water and sediment retaining dam, a double-layer gate system and a movable crane. The control module automatically controls directional scouring and gate opening and closing according to monitoring data. Automatic monitoring, accurate cleaning and hydraulic breaking of the blocking door sand are achieved, the dredging efficiency is effectively improved, and communication of main and branch reservoir capacities of a reservoir is guaranteed.