18 results about "Moraine" patented technology

The present invention discloses a method for identifying ancient glacial till based on nitrate trioxygen isotopes, comprising the following steps: performing a first crushing on an ancient sedimentary rock sample to obtain 60-mesh sample particles; ultrasonically cleaning and drying the sample particles with ultrapure water, and performing a second crushing to obtain a 200-300-mesh sample powder; extracting nitrate from the sample powder by soaking in ultrapure water to obtain a supernatant containing nitrate; first taking out V1 volume of supernatant from the supernatant containing nitrate, measuring the nitrate content in V1 volume of supernatant, and obtaining an optimal supernatant sampling volume V2 for testing the sample on a machine based on the nitrate content in V1 volume of supernatant; taking out V2 volume of supernatant from the remaining supernatant for testing on a machine, obtaining nitrate nitrogen and oxygen isotope data results of the sample to be tested, and then obtaining an ancient glacial till identification result. The present invention realizes the identification of ancient glacial till based on the non-mass effect of nitrate oxygen isotopes.

The present invention discloses a method and application for determining the hazard of a moraine lake outburst. The method calculates a moraine lake outburst susceptibility factor and its conversion value, a moraine lake outburst debris flow probability assessment factor and its conversion value, a moraine lake outburst probability factor for debris flow blocking the main river and its conversion value, and a moraine lake outburst probability factor for the main river's peak flow. Based on the conversion values, a comprehensive moraine lake outburst hazard assessment value is calculated and the moraine lake outburst hazard level is determined. This method addresses the characteristics of moraine lake outburst hazard and comprehensively considers multiple factors that influence the risk of a moraine lake outburst, including outburst floods, debris flows, blocking the main river, and floods caused by re-outburst. This improves the accuracy of the moraine lake outburst hazard assessment results and prioritizes the peak flow factor, which has the greatest impact on the hazard, making the hazard assessment results more reasonable and reliable.

The invention discloses a moraine lake outburst susceptibility judgment method and application, and belongs to the field of hydraulic engineering, and the method comprises the following steps: a, measuring basic parameters of a moraine embankment and a moraine lake, and estimating the volume of potential ice rock collapse or landslide mass entering the moraine lake and the surge wave height and surge wave velocity before the surge is spread to the moraine embankment; b, the water level rising height caused by surges is calculated; c, judging whether the water level of the moraine lake exceeds the downstream slope or the overflow channel after surging; d, calculating the shear stress of the surge on the downstream slope or the overflow channel; and e, judging the susceptibility grade of moraine lake outburst based on the judgment result of whether the water level exceeds or not and the shear stress. According to the method, coupling analysis is carried out on the volume of substances entering the lake, excited surge characteristics, dam structure parameters and water level changes for the first time, the limitation that qualitative evaluation is carried out only depending on a single factor or a few factors in the past is broken through, the accuracy of moraine lake outburst susceptibility judgment is greatly improved, and the applicability is enhanced.

The invention discloses a prevention and treatment method for moraine lake outburst caused by ice rock collapse or landslide and application of the prevention and treatment method, and belongs to the technical field of hydraulic engineering. The method comprises the following steps: S1, measuring the average pitch diameter particle size of a moraine dike downstream slope or a coarse particle armor layer of an overflow channel of the moraine lake, the surface height difference between the existing water level of the moraine lake at an overflow port inlet section and the coarse particle armor layer, the area of the moraine lake and the perimeter of the moraine lake; s2, calculating the rising height of the moraine lake water level after surging; s3, the relation between the water level of the moraine lake and the moraine dike or the overflow channel after surging is judged; s4, calculating the surge shear stress of the surge in the moraine dike downstream slope or the overflow channel; and S5, determining the moraine lake water level height needing to be reduced in moraine lake outburst prevention and control. According to the method, the key condition for causing moraine lake outburst is determined to be the water level after surging, so that moraine lake outburst can be effectively prevented and treated, and the method has a good prevention and treatment effect and applicability.

The invention discloses a thermal-fluid-solid multi-field coupling numerical simulation method for moraine soil in an alpine region, which is characterized in that on the basis of a lattice Boltzmann method, a unified solution framework of a fluid seepage field and a temperature field is constructed, and synchronous calculation of fluid momentum transportation and heat transmission is realized through collision and migration processes of discrete distribution functions. An enthalpy value is introduced as an intermediate variable for describing a phase change process, and ice-water phase change is uniformly brought into an energy conservation framework, so that physical deviation caused by purely based on a temperature threshold criterion is avoided. Fluid seepage, heat transfer, ice-water phase change and solid particle movement behaviors can be uniformly described on the particle scale, and the limitation of solid boundary static assumption on phase change simulation precision in a traditional method is avoided. By introducing an equivalent melting size calculation mode based on average heat transfer, geometric evolution of ice particles in the melting process can be stably and effectively achieved, and a feasible implementation path is provided for phase change simulation under a complex particle system.

A numerical simulation method of a disaster chain from landslide and surge wave to glacier lake outburst, including: obtaining simulation data required by a numerical simulation algorithm based on a depth-averaged mixed flow model coupling a continuum mechanics algorithm with a mixed flow. The simulation data includes at least one of topographic data, location of landslide initiation, volume and depth information of the landslide initiation, coarse particles content and fine particles content in an initial stage of the landslide, a friction angle between the landslide and a bed, coarse particles content and fine particles content of the landslide in an erodible channel, water depth distribution of the glacier lake, a bed roughness coefficient of surge and flood evolution, coarse particles content and fine particles content in a moraine dam, and characteristic particle size of the coarse particles and the fine particles in the moraine dam.

The invention discloses a method for treating tailing pond leakage in a moraine topsoil area, and relates to the technical field of tail dam mine leakage drainage. The method comprises the steps that anti-leakage measures are taken on the earth surface of a water area of a pond area before the tailing pond is used; a tailing sand leakage prevention measure is adopted for the tailing dam body; the drainage shaft plugging mode is optimized to prevent leakage; recycling the percolation water; and dynamically monitoring water quality. The water seepage of the tailings pond reaches the standard, the environmental protection of the tailings pond and the safety of a dumping site are guaranteed, the leakage treatment of the tailings pond does not stop production, the seepage water is effectively collected and recycled, and water resources are saved.

A surface moraine glacier identification method based on multi-modal remote sensing data relates to the technical field of data processing, breaks through the bottleneck of traditional single optical remote sensing, and constructs a multi-dimensional feature space by introducing DEM and SAR data. Through the three-branch independent encoder, the network can autonomously learn terrain priori and geometric features, the ability of distinguishing surface moraine type glaciers is remarkably improved, and the method has obvious technical perspectiveness and practicability. According to the identification method, a two-stage cross-modal fusion strategy is innovatively introduced, and surface feature interaction is realized by preferentially injecting topographic constraints, so that the calculation complexity is reduced, and the physical rationality of fusion is ensured. Meanwhile, a cross selective state space model fusion mechanism is adopted, nonlinear semantic alignment between modes is achieved through cross reading and state space recursion, and deep dependency is efficiently captured with linear complexity. The identification method has remarkable advantages in the aspects of identification precision, calculation efficiency and applicability.

The invention discloses a dam turnover water depth calculation method for moraine lake surge, belongs to the technical field of disaster prevention and control, and can solve the problem that the dam turnover water depth cannot be accurately calculated in the prior art. The method comprises the steps that S1, a freeboard of the moraine lake is determined according to the water level height of the moraine lake and the dam crest height of a dam of the moraine lake; s2, determining the wave height and the wave velocity of the surge propagating to a preset position in front of the dam; s3, calculating a first ratio of the wave height to the freeboard, and calculating a second ratio of the kinetic energy of the wave velocity to the potential energy of the freeboard; and S4, the dam turning water depth of the surge is determined according to the first ratio, the second ratio and the freeboard. The method is used for calculating the dam turning water depth of moraine lake surges.

The invention provides a transparent soil preparation method for visually simulating and demonstrating the melting and seepage process of ice-rich moraine soil, and belongs to the technical field of geotechnical engineering visual model tests. The preparation method comprises the following steps: preparing quartz glass particles; preparing a mixed liquid from white oil and n-dodecane; preparing a mixed liquid frozen block; preparing test soil from the mixed liquid, quartz glass particles and fused quartz sand; laying a test soil layer; laying a mixed liquid frozen block layer; repeatedly and alternately paving the test soil and the mixed liquid frozen blocks until the total thickness meets the test requirement; freezing at low temperature to obtain the transparent soil. The quartz glass particles, the fused quartz sand, the mixed liquid and the mixed liquid frozen blocks are used for simulating coarse gravels, sandy soil, pore fluid, buried ice and other components in the moraine-rich soil respectively, the refractive indexes of all the components are matched, and the technical problem that the melting and seepage process in the moraine-rich soil is difficult to visualize is solved; the method is of great significance to reveal a moraine soil internal structure degradation mechanism under the freezing and thawing effect.

The invention discloses a glacier identification method and device, equipment and a storage medium. The glacier identification method comprises the following steps: extracting exposed glacier pixels and shadow region glacier pixels from a to-be-identified optical remote sensing image by adopting a threshold segmentation method; extracting associated features of the moraine covered glacier from the optical remote sensing image to be identified, the digital elevation model data and the thermal infrared remote sensing image of the glacier research area, and extracting moraine covered glacier pixels by adopting a classification model according to the associated features; and determining the glacier boundary in the optical remote sensing image to be identified according to the exposed glacier pixels, the shadow region glacier pixels and the moraine covered glacier pixels. Multi-source data such as an optical remote sensing image, digital elevation model data and a thermal infrared remote sensing image of a glacier research area are fused, so that topographic information in the digital elevation model data and temperature application of the thermal infrared remote sensing image can be used for performing information supplement on the optical remote sensing image in a complex mountain environment; and the glacier in the complex mountain environment can be accurately identified.

The application discloses a kind of preparation and application of dense fine particle moraine solidified material, belong to the field of glacial geological disaster prevention and control.The material is composed of A component, B component and active agent, A component includes water glass solution, sodium tetraborate;B component includes copper sulfate, phosphoric acid, silver chloride, hydrochloric acid;Active agent includes calcium hydroxide, potassium carbonate.Grasping when, A, B component is mixed before adding active agent to make solidified material, solidified material can be injected better, can be injected into weakly permeable stratum with permeability coefficient 10 ‑5 cm / s, its gel time can be adjusted, moraine grouting solidified body strength can reach 3-4MPa after, solve the technical problems that traditional cement solidified material cannot penetrate diffusion in moraine, poor curing effect and existing chemical solidified material is expensive, has toxicity, grouting solidification management of glacial debris flow, ice lake breach and other geological disasters has great engineering significance.

The invention provides a moraine soil residual strength testing device which comprises a sample shearing box, a shearing assembly, a temperature adjusting part and a simulation pipe group, and the sample shearing box comprises two box bodies which are stacked up and down. The shearing assembly comprises a pushing part and shear stress detection equipment, the pushing part is connected to one box body, the shear stress detection equipment is connected to the other box body, the simulation pipe group comprises a water storage barrel, a conveying pump, a seepage pipe, a water outlet pipe, a recycling barrel and weighing equipment, the conveying pump communicates the water storage barrel with one box body through the seepage pipe, and the water outlet pipe communicates the other box body with the recycling barrel. The test simulation of the synergistic effect of three fields of temperature, seepage and stress is realized, the complex environment of moraine soil in cold region engineering is accurately restored, and a reliable test platform is provided for exploring a multi-field coupling mechanism.

The application discloses a method for adapting to multi-source collaborative geological survey and mineral resource potential evaluation in the Antarctic ice-covered area, and belongs to the technical field of polar geological exploration. In view of the technical problem of low imaging accuracy under the Antarctic ice, the application constructs a four-layer collaborative detection system of space-based, aviation, ground and under-ice; establishes a complete link of seismic full-wave field imaging, adopts reverse time migration (RTM) to realize high-resolution imaging of less than 5 m; establishes a complete reverse time migration imaging processing link, constructs a four-dimensional ice cover interference correction model, adopts a D-S evidence theory multi-source data fusion algorithm, and constructs a four-dimensional interference correction model of ice layer thickness, ice flow velocity, temperature gradient and moraine content; the D-S evidence theory multi-source fusion algorithm is adopted, a quantitative discrimination standard is established based on Vp / Vs, Poisson's ratio and anisotropy, and the target area prediction accuracy is greater than or equal to 85%. All parameters and formulas of the application are fully disclosed, and can be widely applied to the geological survey and mineral evaluation under the Antarctic ice.

The present application relates to the technical field of glacier information processing, and more particularly to a glacier moraine identification method based on multi-source remote sensing parameters, which comprises the following steps: performing radiation-atmosphere joint correction and geometric-reprojection on optical, thermal infrared, synthetic aperture radar and digital elevation data to generate physically consistent data; using a cross-modal visual conversion network and a symmetric neural operator to infer the ground surface temperature under the driving of shortwave albedo, downward radiation and turbulent flux, and obtaining the thickness-presence posterior through normalization flow; constructing an uncertainty field according to information entropy and variance, selecting representative pixel unmanned aerial radar samples by means of quantum annealing, fine-tuning the model through value backflow, and then diffusing the anisotropic graph to output the spatial continuous thickness field. The present application integrates daily weather forecasts to integrate future thickness according to the law of conservation of mass, and couples with the existence index to form a breaching risk grid, thereby realizing high-precision and iterative glacial moraine dam warning.

The invention provides a fracture analysis method and system applied to an SHPB impact test, and belongs to the technical field of SHPB tests.A shooting module is arranged in the pulse direction to obtain an impact image, and time history images of a frozen moraine soil sample at different impact rates are recorded; the method comprises the steps of performing resolution optimization on an impact image based on an image interpolation method to obtain a processed image, enhancing a difference region of a fracture in an undamaged sample based on a histogram equalization method, extracting features of the difference region, summarizing time-history features through a time-history image, inputting the time-history features into a target tracking model, and outputting a topological structure of the sample fracture. And quantifying to obtain the geometrical characteristics of the sample fragments.

The present invention discloses a resilient energy dissipation and protection device for preventing the impact of floating ice and surging waves on moraine dams during earthquake-triggered ice avalanches. The device comprises an energy dissipation device, a connecting plate, an anti-impact device, and a fixing column. The energy dissipation device is arranged on a horizontal surface in front of the dam body; the connecting plate is located between the energy dissipation assembly and the dam body and is hinged to the energy dissipation assembly; the anti-impact device is fixed to the dam body via a fixing column, and its bottom is hinged to the connecting plate; the fixing column is fixed to the dam body. Compared with the existing technology, the present invention provides step-by-step buffering and energy dissipation by providing corresponding energy dissipation devices for floating ice and surging waves. In conjunction with the anti-impact device, the dam body is protected, and a diverse protective structure is used to cope with different types of impacts, thereby improving the protective effect and the service life of the device.

The invention provides a glacier debris flow mechanical property sample preparation and test method, which comprises the following steps: preparing test moraine soil with similar particle content and proper particle size proportion through a parallel grading method, and fully mixing ice particles with the test moraine soil to prepare an ice-soil mixture of which the volume ice content accords with test setting; a series of monotonic triaxial tests are carried out on ice-soil mixtures with different volume ice contents and different environment temperatures under different confining pressures, and the influences of the ice contents and the environment temperatures on the stress-strain relation, the shear strength, the Young modulus, the secant modulus, the Poisson's ratio, the dilatancy angle, the friction angle and the cohesive force are determined. The obtained mechanical behavior results of the ice-soil mixture at different temperatures are helpful for explaining the interaction between ice and soil particles, and have important significance on disaster prevention and control of existing Sichuan and Tibet railways and future infrastructures.