17 results about "Shear zone" patented technology

The invention belongs to the field of geologic disaster prevention and control of geotechnical engineering, and provides a multi-scale numerical simulation method for a slope instability mechanism of a ductile shear zone, which comprises the following steps: acquiring physical and mechanical parameters of a rock-soil body material, and establishing a numerical model based on a particle flow discrete element method; a Johnson-Kendall-Robert contact model is adopted as a contact model between particles, the contact force between the particles is calculated, and meanwhile, a pressure interference parameter is defined to control the limit value of normal contact rigidity; performing dynamic modeling of the discrete element particle system based on a particle generator; static modeling of a discrete element particle system is carried out based on a Lagrange body continuous unit component; the acting force of discrete element particles is converted into equivalent grid node force through an equivalent node force conversion method, and surface attributes of all unit sets possibly involved in contact are defined in a solver.

The application provides a three-dimensional geological modeling method and system for ductile shear zone type gold exploration, and relates to the technical field of gold exploration modeling. The application extracts a plurality of alteration anomaly zones related to gold mineralization hydrothermal alteration by acquiring multispectral remote sensing data of an exploration area; superimposes the anomaly zones to identify a prospecting target area and acquire electrical parameter data such as apparent resistivity and apparent polarization rate; determines the structural geological distribution in combination with surface geological mapping, divides a prospecting unit in space superposition with the target area, sets the electrical parameter range to establish a three-dimensional prospecting unit framework; and obtains the three-dimensional distribution of electrical parameters and the geological unit boundary by jointly inverting the electrical parameters as measured data, the framework and the parameter range, generates a three-dimensional geological model reflecting the spatial distribution of the gold mineralization body, and can accurately depict the spatial distribution of the ductile shear zone type gold mineralization body, thereby supporting efficient exploration.

The application discloses a dangerous rock mass shear zone quality evaluation method based on machine vision, and relates to the technical field of dangerous rock mass monitoring and evaluation, and comprises the following steps: S1, arranging a high-resolution camera, adjusting the angle and focal length, regularly automatically collecting and transmitting image data to a server; S2, using a filter to denoise, adjusting the contrast and histogram equalization, and enhancing the image definition; S3, applying edge detection and feature point detection algorithms to extract key features and cover key areas; applying Canny edge detection and SIFT algorithms for feature extraction, using a convolutional neural network (CNN) for model training and cross-validation, real-time monitoring of shear zone changes and triggering of early warning, displaying analysis results through a heat map and other visualization tools and generating a standardized report, ensuring the standardization and consistency of the monitoring results, thereby improving the efficiency and accuracy of dangerous rock mass shear zone monitoring and effectively preventing geological disaster risks.

A method, system, device, and readable storage medium for predicting leading-edge bulging cracks are disclosed, relating to the field of geological disaster monitoring and early warning. Specifically, the method includes determining the active thrust of the landslide on the leading edge based on the landslide mass weight, sliding surface dip angle, seepage hydrodynamics, and additional thrust, wherein the additional thrust is generated by external dynamic disturbance. When the detected active thrust is not less than the passive earth pressure limit, the target vertical bulging displacement is determined based on horizontal shear displacement, maximum dilatation angle, geometric correction factor for shear zone thickness, hydraulic correction factor, initial effective stress, real-time effective stress, and dilatation angle stress sensitivity factor. The predicted leading-edge bulging crack result is determined based on the target vertical bulging displacement and the predicted vertical bulging displacement. This application can improve the accuracy and applicability of leading-edge bulging crack prediction.

A method for steady-state control of cutting state, implemented based on computer numerical control (CNC) machine tools or cutting lathes. The method comprises: fitting parameters of a stored energy evolution model of a workpiece material to be machined; discretizing primary shear zone into multiple infinitesimals along normal direction of main shear plane; introducing equivalent cutting edge model, inputting pre-used cutting parameters, calculating strain and strain rate of each infinitesimal and analyzing temperature of each infinitesimal; deducing and solving differential equation of each infinitesimal of stored energy to position of the primary shear zone by taking initial shear plane of the primary shear zone as model boundary; determining application values of cutting parameters according to solved results; and, controlling and adjusting the cutting tool in the actual cutting process to cut the workpiece material to be machined with the application values.

The invention provides a plastic particle crushing equipment operation state analysis method, which comprises the following steps: comparing an elastic recovery activation point with a discharge port particle size distribution curve peak value position, evaluating the influence degree of elastic recovery on particle size change, and identifying a particle size thickening trend in combination with a particle compression deformation state in a shearing area; when the particle size thickening trend continuously rises and the gap shrinkage reaches a warning interval, extracting the recovery feature and the resilience force of particle deformation resilience in the shearing area, and identifying a critical threshold value of particle deformation resilience escape from the shearing area; the cutter rotating speed and the feeding rate are adjusted through the compensated shearing force, the blade displacement sensing assembly is calibrated circularly according to the surface temperature change of the main shaft, and when the peak position and the peak width of a particle size distribution curve tend to converge, it is confirmed that particle size distribution reaches a stable state.

The invention relates to the technical field of drilling methods for preventing drill hole dislocation, in particular to a grouting drilling device and a drilling method for preventing drill hole dislocation. According to the technical scheme, the device comprises a power station, a power head installed on the power station in a sliding mode, a connecting rod fixedly installed on the power head and detachably connected with a drill rod, and further comprises a supporting turnover component installed below the power station. The supporting and overturning part comprises a connecting block fixedly installed on the power station, a supporting plate rotationally installed on the connecting block and an overturning plate rotationally installed on the supporting plate, and a clamping assembly for fixing the bottom of the drill rod is installed on the overturning plate. According to the method, the orifice, the vertical section and the turning section can deform and adapt in the stable area, the horizontal section screen pipe can deform and adapt in the separation layer, a rock stratum shear zone causing casing pipe breakage is avoided to the maximum extent, grout overflowing and grout running accidents caused by casing pipe breakage are avoided, and the grouting process is more reliable.

The utility model discloses a hole-containing metal plate sample capable of realizing different stress states in the technical field of material performance testing, which comprises a plate body, two opposite sides of the plate body are provided with two notches which are centrosymmetric and penetrate through the thickness direction of a sample flat plate; the notches comprise two transverse notches which are oppositely arranged in parallel and point to the symmetric center, the ends, close to the symmetric center, of the two transverse notches are connected with two semicircular notches with opposite convex faces through fillets respectively, the two semicircular notches are vertically arranged, and the area between the two semicircular notches is a shearing area. A round hole penetrating through the plate body is formed in the center of the shearing area, the transverse distance between the circle centers of the two semicircular notches is the deflection distance d, the purpose of regulating and controlling the stress state of the metal plate sample is achieved by adjusting the deflection distance d, and the metal plate sample is suitable for macroscopic and microcosmic mechanical experiments.

The invention belongs to the crossing field of tectonic geology and isotope chronology, and particularly relates to a method for determining the deformation time limit of a ductile shear zone, which comprises the following steps: step 1, field geological survey and sample collection; step 2, sample preparation and microscopic structure research; step 3, apatite formation cause identification; step 4, micro-cell U-Pb dating test is carried out; and step 5, data processing and analysis. According to the method disclosed by the invention, the deformation age of the ductile shear zone in the granite body is rapidly and accurately obtained through apatite U-Pb micro-area analysis.

This invention relates to the field of marine geotechnical engineering technology, and provides a method and system for monitoring the shear state of calcareous sand based on acoustic emission centroid frequency. The method includes conducting a ring shear test on the calcareous sand to obtain the shear stress-shear displacement curve during the shearing process; attaching an acoustic emission sensor to the loading plate of the ring shear tester and using an acoustic emission monitoring system to collect acoustic emission signals during the shearing process; performing impact detection on the acoustic emission signals and extracting the waveforms of the impact signals; calculating the average centroid frequency of all impact waveforms within each preset time period; and based on the change in the average centroid frequency, analyzing the micromechanical mechanism of shearing in the calcareous sand and providing early warning of shear zone development and failure. This method can monitor the shear state of calcareous sand throughout the entire process and can be used for early warning of shear failure in calcareous sand foundations and other sandy soil materials in marine engineering.

This invention discloses a method for determining the rock failure surface during drilling, comprising the following steps: 1) simulating and determining the drilling force model, and determining the relationship between the components in the model; 2) calculating the maximum shear stress at which the rock structure undergoes plastic failure; 3) determining the shape of the failure surface and the maximum shear stress τ in the shear zone determined in step 2) according to the maximum shear stress criterion. max This is related to predicting the failure surface; 4) Based on the maximum shear stress criterion, the iterative method is used to solve the force acting on the cutting surface, and the function of the failure surface is determined by inputting the basic drilling parameters, quantitatively presenting the failure surface morphology. The method of this invention introduces the Michel solution of elastoplastic mechanics to solve the stress state of the rock shear zone during drilling, and derives a specific response function of rock properties to drilling parameters based on the stress characteristics of the drill bit; referring to the maximum shear stress criterion, the shear stress of the unit body is compared with the shear strength of the rock to determine whether the rock is broken.

The application discloses a kind of hidden order to dip rock slope grading collaborative anchoring prevention and control methods, it is related to the technical field of hidden order to dip rock slope grading collaborative anchoring prevention and control, comprising the following steps: obtaining the geological survey data of target slope, and generate the digital model of slope by multiple grid nodes;Strength reduction is carried out to the digital model of slope, simulates the process that target slope evolves from steady state to non-steady state, and obtains each grid node data in simulation process, and calculates the shear strain value of each grid node, generates initial slope stress field data.The application accurately tracks the dynamic evolution path of shear zone by strength reduction simulation and space-time sequence reconstruction, can accurately identify shear evolution characteristics, so as to effectively avoid the position of reinforcement and actual disaster domain misplacement, so as to effectively avoid the reinforcement failure caused by shear failure of slope, effectively improve the prevention and control effect.

The mixing and homogenizing all-in-one machine comprises a stirring bin, a first stirring assembly and a second stirring assembly, the first stirring assembly is arranged at the bottom of the stirring bin; the second stirring assembly is arranged above the first stirring assembly; a circumferential outer diameter boundary formed by the tail end of the blade of the second stirring assembly in the rotating process is positioned in a circumferential inner diameter boundary formed by the rotation of the blade of the first stirring assembly, and a radial convection shearing area is formed between the circumferential outer diameter boundary and the circumferential inner diameter boundary. On one hand, materials can be sheared at high strength and fiberized quickly, and a stable circulation path is formed in the stirring bin; on the other hand, materials in a high-temperature shearing area can be rapidly cooled, heating of the materials is effectively inhibited, high-temperature damage of the materials is prevented, and residues at the bottom of the stirring bin are effectively removed.

The invention belongs to the field of in-situ nanomechanics testing, and provides a pressure-to-shear in-situ nanomechanics quantitative testing method, which comprises the following steps of: preparing a micron sheet from a sample by using a focused ion beam system, transferring and fixing the micron sheet at the top of a semicircular copper net, and processing a pressure-to-shear microstructure on the micron sheet, the microstructure comprises a push block, a sample shearing area 1, a sample shearing area 2 and a central empty slot area; the semicircular copper mesh is fixed on an in-situ nanomechanics compression sample table, a push block of the pressure-to-shear microstructure is pushed by a flat pressure head in a transmission electron microscope, the pressure-to-shear microstructure converts pressure stress into shear stress, and the failure behavior of a sample shear area under the action of the shear stress is observed in real time. According to the invention, a pressure-to-shear microstructure is designed, the pressure-to-shear microstructure is prepared by using a focused ion beam processing technology, and in-situ nanomechanical quantitative testing of the failure behavior of a material under the action of shear stress is realized by combining an in-situ nanocompression technology.

The present invention discloses a method, system, terminal, and medium for analyzing the internal shear zone of a composite sliding slope, relating to the technical field of rock mechanics analysis. The key points of the technical solution are: decomposing the composite sliding slope into a main sliding block and a blocking sliding block; considering the tangential stress and normal stress of the shear surface within the landslide body, establishing a first mechanical equilibrium model for the main sliding block and a second mechanical equilibrium model for the blocking sliding block based on the rigid body limit equilibrium method; combining the first and second mechanical equilibrium models to calculate the geometric parameter range of the internal shear surface of the composite sliding slope body under the limit equilibrium state; determining the correlation function between the geometric parameters of the internal shear surface and the safety factor of the composite sliding slope body based on the first and second mechanical equilibrium models; and determining the minimum safety factor based on the correlation function and the geometric parameter range. The present invention can determine the geometric parameters of the internal shear surface of the slope, thereby determining the minimum safety factor of the composite sliding slope body.

The invention discloses a rock variable-angle shearing device and an infiltration test device, and relates to the technical field of rock mechanics experiments.The rock variable-angle shearing device comprises a base, a beveling plate assembly, an infiltration test device, a mechanical test system, a seepage and crack observation system, and shear zone evolution and seepage dynamic visualization are achieved through a high-speed camera; correlation analysis with mechanical response is carried out; through the design of the rotating shaft and the sliding part, the shear angle is flexibly adjusted and accurately fixed, a seepage-mechanical coupling research platform is provided in combination with an infiltration test device, meanwhile, mechanical loading, seepage experiment and crack observation are deeply integrated, a multi-field coupling system is constructed, complex environment response is synchronously simulated, and the test efficiency is improved. And multi-dimensional data are captured by utilizing fluorescence development and high-speed photography, a water-force coupling instability mechanism is disclosed, and technical support is provided for disaster prevention and control.

This invention discloses a method and system for inverting test data from a tunnel dynamic model. The method includes: constructing a similar model of the target tunnel and placing it in a model box; applying a preset dynamic load to the bottom of the model box using a vibration table; acquiring first, second, and third data; and performing inversion calculations to obtain stress, strain, and / or displacement data of the tunnel lining during dynamic loading. This invention fundamentally eliminates the physical interference of sensors and their wiring on the model body. Linear shape sensing ribs can continuously capture the overall deformation surface of the lining, and intelligent particle groups can synchronously track the motion vector field of thousands of particles inside the surrounding rock. This allows for a complete revelation of continuous, full-domain dynamic processes such as structural buckling modes and soil shear zone evolution, resulting in an order-of-magnitude improvement in spatial coverage and information dimension of the acquired data.