32 results about "Fracture face" patented technology

The invention relates to the technical field of tunnel detection, and discloses a laser tunnel section detector which comprises a supporting frame, a mounting table is arranged at the top of the supporting frame, a section detector is connected to the mounting table, an operator carries the section detector to the position, needing to be detected, of a tunnel section, then the section detector is started, and the section detector is started. When vibration generated by construction is transmitted to the position of the supporting frame and the supporting frame moves upwards under the influence of the vibration, the leveling assembly and / or the hydraulic assembly are / is driven to move, the vibration borne by the supporting frame is fully reduced through the hydraulic assembly and / or the leveling assembly, and the stability of the section detector during detection is guaranteed; the support frame is effectively prevented from being influenced by vibration generated by tunnel construction, so that the fracture surface detector vibrates, the contour line scanned by the fracture surface detector easily has large fluctuation, and the detection accuracy is ensured.

The application discloses a kind of based on microseismic crack face construction and seepage evaluation method, belong to geological analysis technical field.Use hydraulic fracturing to the detection area, the microseismic source position identification generated by rock mass rupture;Determine the best fitting crack plane from the clustered microseismic source position, extract the spatial orientation information of hydraulic fracturing induced crack;Reconstruct the spatial distribution range of hydraulic fracturing induced crack in the plane, obtain the induced crack geometry of limited scale;Discretize the geometry of induced crack face, construct a simplified hydraulic fracture plane at the perforation location and discretize, form the crack geometry set containing induced crack and hydraulic fracture;Embed the crack geometry set containing induced crack and hydraulic fracture into the rock geometry model, carry out reservoir seepage simulation under real working conditions, quantitative evaluation.It is simple in steps, convenient to use, and has good imaging effect.

The application belongs to the technical field of medical image processing, and particularly relates to a kind of bone fracture block automatic reduction methods based on medical image;Including: obtaining the three-dimensional medical image data and three-dimensional label data after fracture of the object to be processed, and pre-processing the three-dimensional medical image data after fracture;The three-dimensional medical image data after fracture is input into the fracture surface segmentation model trained, and the main bone surface area and fracture block surface area are obtained;Three-dimensional coordinates are extracted and main bone surface point cloud and fracture block surface point cloud are constructed;Iterative closest point registration is carried out on the two kinds, and the cumulative rigid body transformation parameter is obtained;The voxel coordinate set corresponding to the fracture block is determined, and the voxel coordinate set is subjected to spatial transformation using the cumulative rigid body transformation parameter, to obtain the three-dimensional label result after reduction;The application can simultaneously complete the problems of automatic identification of fracture section and automatic solution of fracture block reduction posture, improve the degree of automation, result stability and interpretability of fracture block reduction process.

The invention discloses a method and a device for removing a high-pressure casting pouring system. The method comprises the following steps: generating a preset fracture guide structure on one side of a product body in a connecting area of the product body and a pouring system; the high-pressure casting with the structure is moved along a first axis of movement and is engaged with the moving gating system in a predetermined position by means of a separation tool. Through the synergistic effect of continuous movement of the workpiece and meshing hindering of the separation tool, a composite separation force composed of a shearing force and a bending / drawing force is generated at the preset fracture guiding structure, and therefore the pouring system is separated accurately in a low-damage mode along a preset path. According to the method, through a two-step method of'preset guiding and dynamic composite force separation ', rough impact fracture is converted into a controllable and low-stress crack propagation process, the problems that a product body is prone to being damaged, the fracture surface quality is poor and the percent of pass is low in a traditional process are fundamentally solved, and the automation level and precision of removal operation and the product quality are remarkably improved.

The invention belongs to the field of tunnel blast hole layout, and provides a tunnel blast hole distribution determination method and system based on spatial constraint and while-drilling parameters. The tunnel blast hole distribution determination method comprises the following steps: determining while-drilling parameters according to the type of surrounding rock and the working range of drilling equipment, and further determining a Prjobi coefficient; the method comprises the following steps of: determining a punching type according to a Principh coefficient and parameters of a tunnel face, and then adaptively dividing the tunnel face into seven blast hole subareas, namely a slotting hole area, a slot expanding area, a blast hole pressing area, a blast hole lifting area, a bottom plate hole area, an inner ring hole area and a peripheral hole area; and under the constraint of the working range of the drilling equipment, a preset blasting condition is combined, the blast hole distribution rule of each subarea is calculated according to the row pitch and hole pitch combination, and a blast hole distribution scheme of each subarea is obtained. According to the method, the tunnel section form and the drilling equipment operation constraint can be fully combined, automatic laying of the tunnel blast holes is achieved, the obtained hole laying scheme is accurate, the constructability is high, and the blasting contour forming quality and the tunneling efficiency are effectively improved.

The invention discloses an annular sample for preparing an intergranular fracture, a heat treatment method of the annular sample, a preparation method of an intergranular fracture sample and the intergranular fracture sample, and relates to the technical field of materials, the inner diameter of the annular sample is D0, the width of the annular sample in the axial direction is h, and h / D0 is larger than or equal to 0.2 and smaller than or equal to 0.6. Through the short and thick annular sample, h is obviously smaller than D0, after knocking, a plane section can be obtained, the section is basically parallel to the axial direction of the sample, the along-crystal section can be shot by directly clamping the sample in the axial direction, the time cost for obtaining the along-crystal fracture is reduced, and the quality of the along-crystal fracture is improved. When h / D0 is smaller than 0.2, the problems that the radial length of a circular ring is too short, the effective sectional area of a fracture fragment is too small and the fracture shooting efficiency is low exist, and when h / D0 is larger than 0.6, the problems that the radial length of the circular ring is too long, the breaking operation is inconvenient and the fracture of the formed fragment is irregular exist. And shooting is inconvenient when the fracture is placed into a scanning electron microscope.

The invention discloses 15.8 grade ultrahigh strength delayed fracture resistant steel for fasteners and a manufacturing method of the 15.8 grade ultrahigh strength delayed fracture resistant steel. The 15.8 grade ultrahigh strength delayed fracture resistant steel comprises, by mass, 0.40%-0.50% of C, 0.15%-0.35% of Si, 0.50%-1.00% of Mn, smaller than or equal to 0.015% of P, smaller than or equal to 0.010% of S, 0.90%-1.20% of Cr, 0.10%-0.20% of Ni, 0.70%-0.90% of Mo, 0.20%-0.40% of V, 0.02%-0.08% of Nb, 0.010%-0.020% of Ti, 0.020%-0.040% of Al, 0.0040%-0.0080% of N and the balance Fe and inevitable impurity elements. The manufacturing process comprises the steps of converter smelting, LF refining, RH vacuum degassing, continuous casting, heating and cogging, flaw detection and coping, high-speed wire rolling, follow-up treatment and the like, a lower bainite structure is obtained after a wire rod is subjected to annealing, wire drawing, cold heading and isothermal quenching heat treatment, and the mechanical properties of the lower bainite structure are as follows: the tensile strength is 1500-1670 MPa, the yield strength is larger than or equal to 1200 MPa, the ductility is larger than or equal to 9%, and the percentage reduction of area is larger than or equal to 48%; and the material has excellent delayed fracture resistance, and is suitable for high-end fields such as aerospace, rail transit and the like.

The present invention discloses a fracture prediction method and system, including: performing fracture enhancement and interpretive processing on the three-dimensional seismic data of a target work area; preferably key attributes for fracture prediction, calculating attributes for the data volume obtained from the fracture enhancement and interpretive processing to obtain various attribute calculation results containing attribute value information of points at different positions; extracting various attribute values at fractures of different levels from the various attribute calculation results to form a sample matrix; determining determination rules for cross-sections of different levels according to the geological characteristics of the target work area and in combination with the various attribute calculation results, thereby forming a cross-section feature recognition library; constructing a fracture prediction model according to the sample matrix and the cross-section feature recognition library; obtaining the sample matrix of the area to be predicted, and using the fracture prediction model to perform fracture level prediction based on scale. The present invention solves the problem of multi-solution in manual interpretation of strike-slip cross-sections and the problem of uniqueness in fracture characterization of a single discontinuous attribute.

A supporting structure of a variable-section end of an underground cavity of a cross-fault fracture zone comprises the variable-section end with a large section changed into a small section suddenly, and further comprises an advanced small guide pipe, an embedded cover arch, a guide steel pipe and a pipe shed, the advanced small guide pipe is inserted into a soil body from the edge of the variable-section end, the embedded cover arch is of an arch-shaped structure formed by pouring concrete, and the guide steel pipe is connected with the pipe shed. The embedded cover arch is embedded in the variable section end, the guide steel pipe is arranged on the embedded cover arch, and the pipe shed is installed in a soil body through the guide steel pipe. The structure is applied to underground space with large fracture and transition of excavation from a large section to a small section to support construction, the embedded cover arch is arranged at the variable section end, the engineering problem that a traditional pipe shed grouting reinforcement end is unstable can be effectively solved, the reinforcement effect of the variable section end is effectively guaranteed, and the construction safety risk is reduced.

The present invention discloses a method and system for generating a connecting rod expansion profile. The method comprises: classifying historical expansion-fractured connecting rods based on the inner diameter of the connecting rod's big-end hole, the connecting rod's thickness, and the expansion-section area, and establishing a classification profile database containing material grades and heat treatment parameters; performing fracture mechanics analysis on the classification profile database, using a theoretical expansion profile as a reference plane, and employing a sphere envelope algorithm to fit the actual profile, outputting a set of fracture characteristic parameters; invoking the fracture characteristic parameter set and performing a dynamic fracture process simulation in combination with the material's fracture toughness value, generating an initial expansion-fracture profile surface containing randomly distributed protrusions and pits; and performing finite element contact analysis on the initial expansion-fracture profile surface, outputting an optimized expansion-fracture profile surface. Using embodiments of the present invention, accurate modeling and optimization of the expansion-section profile morphology can be achieved, ensuring the mechanical properties of the expansion section and improving the overall reliability of the connecting rod.

According to one embodiment, a fracture section image analysis device includes an acquisitor configured to acquire a first image including a fracture section of a component, and a processor configured to perform image analysis for the first image. The image analysis includes a first process and a second process. The first process includes deriving a plurality of fracture progress directions in the fracture section. One of the plurality of fracture progress directions corresponds to one of a plurality of positions included in the fracture section. The second process includes deriving a fracture origin position in the fracture section based on at least a part of the plurality of fracture progress directions.

The invention provides an image method tunnel surrounding rock monitoring and early warning system, which comprises a hardware acquisition layer, a data processing layer and a platform application layer, the hardware acquisition layer is composed of a high-definition image acquisition device, a data transmission device and an auxiliary device and is a data source basis of the system. The data processing layer is responsible for preprocessing, analyzing and modeling image data, and adopts a mixed architecture of edge end equipment calculation and cloud server calculation; the platform application layer provides a visual operation interface and diversified function services for a user, and supports access of a Web terminal, a mobile terminal and a local terminal. The system has the advantages that a sensor does not need to be installed on the surface of surrounding rock, interference to the stability of the surrounding rock is avoided, the system is particularly suitable for complex geological areas such as crushed zones and weak surrounding rock, a single camera can cover tens of square meters of areas, and tunnel full-section monitoring is achieved through cooperation of multiple devices; the deformation monitoring precision reaches the sub-pixel level, the crack width recognition precision reaches 0.05 mm, and the high-precision requirement of engineering monitoring is met.

The invention discloses a method for treating water burst of a fault fracture zone through long-distance directional drilling and pre-grouting of a working face in a tunnel, a directional drilling technology is adopted in the tunnel, a high-pressure grouting technology is combined, 4-8 directional drilling holes are uniformly arranged along the circle diameter of 1-3m outside the contour line of the section of the tunnel, and each directional drilling hole is formed at a certain opening angle; when directional drilling is constructed, the drilling track of the directional drilling is controlled to firstly pass through the deflecting section, then the directional drilling is converted into a horizontal section parallel to the axis of the tunnel, and the starting point of the horizontal section is located at the position 4-6 times of the diameter of the tunnel in front of the starting section of the fault fracture zone; the end point of the horizontal section is located at the position 4-6 times of the diameter of the tunnel behind a fault fracture zone end section, the one-time treatment length is 200-500 m, in the drilling construction process, high-pressure grouting work is conducted after holes are formed, a water plugging and reinforcing curtain with a certain thickness is formed on the periphery of the tunnel through grouting of all the drilled holes, and it is guaranteed that water burst disasters do not occur during tunnel tunneling.

The invention discloses a method and a system for evaluating the interface failure mode of a recycled asphalt mixture, and the method comprises the following steps: cutting the recycled asphalt mixture to prepare a test piece with a preset fracture path, drawing the test piece by using drawing test equipment, and recording a force-displacement curve, the method comprises the following steps of: calculating the overall total fracture strength or total fracture energy of a test piece, identifying various different microcosmic fracture modes existing on a drawing fracture surface, quantitatively calculating the percentage of the fracture area occupied by each mode and the total fracture surface area, and establishing and solving an equation set for describing the relationship between the total fracture performance and the contribution of each mode. And calculating to obtain the unit area breaking strength or breaking energy corresponding to each specific microcosmic damage mode. The method can accurately identify, quantify and analyze the contribution of different failure modes of the regenerated asphalt mixture interface, and provides an effective means for deeply understanding material performance, optimizing design and realizing high-valued application.

The utility model relates to a reinforcing structure for a fault fracture zone in front of a tunnel face, which relates to the technical field of tunnel construction and is used for solving the problems of unclear reinforcing target, unclear reinforcing range, large grouting amount and material waste in the traditional full-section reinforcing method. Comprising a pier-shaped reinforcing body, first grouting holes distributed in a matrix mode are formed in a tunnel face in front of a fault fracture zone, the first grouting holes conduct grouting to form the pier-shaped reinforcing body, one end of the pier-shaped reinforcing body in the tunneling direction is an inclined face, and an acute angle is formed between the end of the pier-shaped reinforcing body and the tunneling direction; a plurality of second grouting holes are formed in the pier-shaped reinforcing body, each second grouting hole goes deep into a hard rock stratum zone in the tunneling direction of the tunnel, and the anchor rods are fixedly installed in the second grouting holes through grouting.

The invention provides an automatic rock cutting depth measurement method, and relates to the technical field of depth measurement, and the method comprises the steps: obtaining a plurality of groups of fracture surface CT scanning images of a rock cut by abrasive water jet, constructing a three-dimensional digital rock core model and a three-dimensional kerf model, and obtaining a rock cutting depth according to a kerf side image; the method comprises the following steps: acquiring a pixel matrix of a kerf side image and a coordinate pixel set of a kerf area, scanning each column of the kerf side image, acquiring a vertical coordinate set of zero pixel points of each column and maximum and minimum vertical coordinate values of each column, constructing a corresponding proportion of the column with the most zero pixel points and the actual depth of the column, and calculating the actual depth of the kerf area; according to the method, the rock cutting depth can be automatically measured, and meanwhile, higher measurement precision can be obtained.

The present invention relates to the technical field of blasting excavation, and specifically to a segmented straight-hole cut blasting method, comprising drilling, charging and detonation at an excavation face. During drilling at the excavation face, the arrangement of cut holes comprises the following steps: S1, at the central position of a cut zone in a roadway cross-section, using a down-the-hole drill to drill a large-diameter center hole having a diameter of 100-120 mm and a depth of 4 m or more; S2, arranging four to six fracture-expansion holes around the large-diameter center hole, wherein the depth of each fracture-expansion hole is at least 4 m, the center distance between the fracture-expansion hole and the center hole is 0.5-1.0 m, and the axial direction of the fracture-expansion hole is consistent with that of the center hole; S3, arranging a row of fracturing holes between the fracture-expansion holes, wherein the depth of the fracturing holes is 0.5 times that of the fracture-expansion holes; and S4, arranging an additional row of auxiliary throwing holes with a spacing of 0.5 m below the lowest fracture-expansion hole, wherein the drilling direction of the auxiliary throwing holes is inclined towards the roof of a roadway and forms an included angle of less than 90 degrees with the roadway cross-section. The present invention can solve the problems of limited blasting depth and low efficiency during cut blasting, and has good market application prospects.

The application discloses an experimental method and system for testing the dissolution degree of a fracture surface. A plurality of homologous core samples are obtained from the same geological unit and a standardized reaction surface is prepared; initial physical property parameters are obtained; at least two samples are placed in a closed reaction environment simulating reservoir temperature and pressure and fluid flow conditions for dynamic dissolution experiments; at a plurality of preset time nodes, the reacted samples are sequentially taken out for destructive testing under the premise of ensuring the continuity of the thermodynamic and hydrodynamic states of the reaction system, and morphology and mechanical property evolution data are obtained; meanwhile, the outflow is continuously collected according to the period to analyze the element content change; the initial physical property parameters, the time-series mechanical property evolution data and the time-series chemical element release data are integrated to establish a quantitative dynamic correlation model between the dissolution degree of the fracture surface and the mechanical property evolution. The application realizes high-fidelity comprehensive evaluation of the dissolution evolution law of the fracture surface, and provides key data support for the optimization of the fracturing process and the safety evaluation of CO2 storage.

The present application discloses a method for measuring residual stress inside building ceramics, which includes prefabricating scratches at the measurement position on the ceramic surface, causing the ceramic to undergo brittle fracture along the scratches, forming two fracture surfaces, and then optimizing the contour data. The cross-sectional contour data is converted into stress along the normal direction of the fracture surface through finite element modeling calculation. The present application prefabricates scratches at the measurement position on the ceramic surface, causing the ceramic to undergo brittle fracture along the scratches, forming two fracture surfaces. By measuring the elastic deformation of the fracture surface caused by stress release, and then through finite element numerical simulation, the elastic deformation is reversely calculated to obtain a two-dimensional residual stress distribution cloud map of the fracture surface. The method has high measurement accuracy and good spatial resolution, realizes full-thickness stress measurement of the ceramic, provides rich and accurate residual stress distribution information, and can provide effective data support for ceramic composition design improvement, production process planning improvement, and later ceramic product service life prediction.

The present invention discloses a method for establishing a connection between the dimple morphology of a metallic glass fracture surface and the distribution of flow units. The method mainly quantitatively characterizes and establishes a connection between the dimple morphology distribution of the metallic glass fracture surface and the distribution of flow units. The established relationship between the dimple morphology distribution of the fracture surface and the flow unit distribution will play a role in establishing the relationship between the macroscopic mechanical performance behavior and the microstructure of the metallic glass. The present invention first statistically calculates the dimple morphology distribution of the metallic glass fracture surface, characterizes the distribution of the flow units through the behavior of β relaxation, and compares the change in the σ value that characterizes the degree of discreteness of the dimple morphology distribution with the half-height width FWHM value that characterizes the distribution of the flow units, and obtains that the dimple morphology distribution of the metallic glass fracture surface and the flow unit distribution show a consistent change trend. The σ value that characterizes the dimple morphology distribution of the metallic glass according to the present invention is consistent with the change trend of the half-height width FWHM value that characterizes the distribution of the flow units, that is, the connection between the dimple morphology distribution of the metallic glass fracture surface and the flow unit distribution is established.

The invention belongs to the technical field of rock soil and tunnel engineering, and particularly discloses a tunnel face anchor rod design method based on a generalized logarithmic spiral failure model. According to the method, by introducing a friction weight coefficient, a generalized logarithmic helix failure model capable of continuously transitioning along with rock-soil mass cohesion and an internal friction angle is constructed; establishing a three-dimensional geometric model of a potential failure body in front of the tunnel face by combining a hemispherical collapse body, a dome rectangular bottom silo and a generalized logarithmic spiral slip body; and finally, traversing and solving the ultimate constraint force and the corresponding fracture depth of the tunnel face based on an overall moment balance equation, further providing an anchor rod reinforcement density calculation method, providing a tunnel face core soil fracture surface curve, and realizing the anchor rod length partition design with equal length of the upper half section and gradual change of the lower half section. According to the method, the defects that a traditional model is single in form, the spatial form of the loose area cannot be accurately represented, and anchor rod design depends on experience are overcome, and the theoretical property, accuracy and economical efficiency of supporting parameters are remarkably improved.

The application discloses a proppant sanding experiment device and method considering crack surface roughness and filtration, and the experiment device comprises a fracturing fluid supply device and a crack simulation sanding device, the crack simulation sanding device comprises a titanium powder sintered plate, a rotary driving structure and a transparent crack A surface; the crack A surface is sealingly connected with one side of the titanium powder sintered plate, the crack A surface and the titanium powder sintered plate enclose a closed cavity as a visualized simulation crack for sanding experiment, the closed cavity is taken as a simulation crack, the two ends of the closed cavity along the horizontal direction are respectively provided with a liquid inlet and a liquid outlet, the fracturing fluid supply device is connected with the liquid inlet, the liquid inlet and the liquid outlet are both provided with valves, and the surface of the titanium powder sintered plate used for enclosing the closed cavity is arranged as a surface same as the rough surface form and roughness of a real crack. The application can more truly simulate the proppant sanding condition under the condition that the filtration exists in the formation crack.

The invention belongs to the field of retaining wall engineering, and particularly relates to a model test determination method for a potential fracture surface of a reinforced soil retaining wall, which comprises the following steps: erecting a reinforced concrete model box; reinforced soil is laid; geogrids are fully laid in the longitudinal direction, twist nails are arranged in the longitudinal direction of the geogrids at intervals, drainage blind pipes are fixed, the length from the twist nails to the rear wall is measured, and then plain fill is filled; carrying out a loading test on the top of the reinforced soil retaining wall, measuring the distance between each twist nail and the rear wall of the model box as well as the distance between the corresponding rib material mark point and the rear wall of the model box to obtain final positions, and subtracting the position changes of the twist nails and the corresponding rib material mark point to obtain the relative displacement of rib soil; and the twisted nails with the relative displacement peak value in each layer of reinforced soil in the side face of the reinforced soil retaining wall are marked, a smooth curve for connecting the twisted nails marked in each layer of reinforced soil is drawn, and the actual potential fracture face of the reinforced soil retaining wall can be obtained. The method does not need a large number of tests, is low in cost, simple and easy to implement, rapid and effective, and can reflect the reinforced soil retaining wall damage mechanism more truly.

The invention provides a device for simulating migration of nuclides in a multi-scale fracture system and a method for calculating migration parameters of the nuclides in the multi-scale fracture system. The device comprises an injection pump, a fracture system and an automatic collector which are hermetically connected through a silicone tube. The fracture system comprises a rock block and four thin plates, n equal-thickness sections are formed in the middle of the rock block to serve as fracture water flow channels, all the sections start from the same side face of the rock block and end at the opposite side face of the side face, n sections penetrating through the whole rock block are formed, and n is a positive integer. The four thin plates cover the four side faces of the rock block and are used for blocking cracks of the four side faces, the thin plates and the rock block are fixed through sealant, and a crack water flow channel is blocked into a closed space. The device can simulate the migration process of nuclides in multi-scale fracture systems such as a single fracture, a cross fracture and a fracture grid, thereby calculating the migration parameters of the nuclides in the multi-scale fracture systems, and clarifying the migration characteristics of the nuclides in a heterogeneous fracture channel.

The invention provides a method and a system for predicting dynamic load induced by buckling fracture of mining cantilever rock mass, and belongs to the technical field of cantilever rock mass dynamic load prediction. The method comprises the following steps: carrying out a buckling fracture test on a mining-induced non-uniform load-bearing cantilever rock mass to obtain elastic deformation energy of the cantilever rock mass when the cantilever rock mass is fractured under different load gradients; performing three-dimensional scanning on the fracture interface after the cantilever rock mass is fractured by using a three-dimensional scanning technology, and calculating the curvature of the fracture interface; establishing a function relationship between the section curvature and the elastic deformation energy according to different section curvatures and the corresponding fracture elastic deformation energy; on the basis of the function relation, the fracture elastic deformation energy is equivalent to a pair of power couples acting on the fixed end of the cantilever, and a calculation formula of the fracture dynamic load strength of the cantilever rock mass under different curvature conditions is deduced; and according to the calculation formula, the dynamic load strength generated by cantilever rock mass fracture is obtained by combining fracture curvatures corresponding to different load gradients. According to the scheme, the real dynamic response of rock mass fracture in the mining environment can be accurately reflected.

The invention relates to a monocular vision TBM tunnel surrounding rock fracture network three-dimensional reconstruction system, and the system is characterized in that an image collection module is used for collecting a surrounding rock surface two-dimensional image; the image preprocessing module is used for carrying out crack identification, binarization processing, hole adaptive filling and skeleton extraction on the image; the spatial analysis module is used for extracting depth information of each pixel point in the image through coordinate conversion in combination with the geometric hypothesis that the TBM tunnel section is a regular smooth cylinder and the internal reference and the external reference of the industrial camera array; the fracture dimension conversion module is used for performing intersection point identification and separation on the extracted skeleton pixel points, and converting the two-dimensional image of the surrounding rock surface into Poisson disk representation in a three-dimensional space; and the fracture network reconstruction module is used for aggregating the Poisson discs into a complete fracture surface and generating a TBM tunnel surrounding rock fracture network three-dimensional model. According to the method, high-precision tunnel surrounding rock fracture network three-dimensional reconstruction is realized, and the method is suitable for a dynamic working environment of continuous tunneling of a TBM (Tunnel Boring Machine).

The invention discloses a fracture sealing property quantitative evaluation method based on fault rock pore medium static balance, and the method comprises the steps: determining the internal structure of a fracture system, and starting from the analysis of the internal microstructure of the fracture system, dividing the internal structure of the fracture system; fault rock static equilibrium analysis is introduced into a Terzaghi model, a fracture vertical closing coefficient is defined according to fault rock section positive pressure, fault rock pore fluid pressure and fault rock compressive strength parameters, and the change rule of fracture sealing performance in the fracture evolution process is dynamically described; comprehensive fracture lateral sealing performance evaluation is carried out, the fault mudstone ratio SGR is calculated, and finally fracture sealing performance changes of different positions of the fracture are evaluated. According to the invention, the problem of low precision of an existing closure evaluation method for a complex fracture structure is solved.

The present invention provides a method for three-dimensional reconstruction and scale calibration of alloy fracture surfaces, which relates to the technical field of material microscopic characterization and analysis, and includes: processing a sample to obtain an experimental specimen; performing a thermo-mechanical coupling deformation experiment on the specimen to obtain a fracture surface sample; pasting the fracture surface sample on a sample stage and then fixing it in a scanning electron microscope; obtaining fracture surface sample images at different angles by tilting the sample stage, performing three-dimensional reconstruction to obtain a three-dimensional fracture surface model; selecting two marked points on the cross-section of the fracture surface sample, adjusting the height of the sample stage to continuously collect images of the two marked point regions, retaining the clearest image, and recording the three-dimensional coordinates of the sample stage at this time; calculating the distance between the two marked points according to the two sets of three-dimensional coordinates, and scaling the three-dimensional fracture surface model to complete scale calibration. The present invention solves the problem of lack of three-dimensional information during fracture surface analysis, and obtains a three-dimensional fracture surface model with complete features and accurate scale while taking efficiency into account, which can assist in analyzing the fracture process of alloy specimens.

The application discloses a method for reducing cost and increasing efficiency of a cutter of a cutter head of a shield construction in a composite stratum, and can effectively reduce cutter wear and damage probability, improve cutter use efficiency, reduce time consumed by a shield machine due to cutter replacement and stop of advancing, shorten a construction period, reduce construction cost, and further realize reduction of construction cost and improvement of construction efficiency of tunnel engineering construction. The application solves the problem of the conventional shield cutter head construction in the composite stratum with the upper soft and the lower hard, the fracture zone and the full-face hard rock cooperation, the serious cutter wear, the high damage rate and the influence on the construction period.

The invention belongs to the technical field of geological exploration, and particularly discloses a fracture plugging performance evaluation method based on multi-dimensional seismic information, electronic equipment and a storage medium. The method comprises the following steps: preprocessing seismic data; establishing a spatial structure model of target fracture based on the pre-processed seismic data, and sequentially solving a fracture activity intensity data body and a section inclination angle data body; respectively normalizing the two data volumes to obtain fracture activity intensity and section inclination angle probability volumes, respectively assigning values of the two probability volumes to a spatial structure model of the target fracture to obtain a fracture activity intensity probability model and a section inclination angle probability model, and performing product operation on the fracture activity intensity probability model and the section inclination angle probability model to obtain a plugging evaluation result based on the multi-dimensional seismic information. The method has good generalization performance and applicability in the aspect of basic data acquisition, other important parameters for fracture plugging performance evaluation can be comprehensively considered, and the plugging performance evaluation precision of key fractures such as storage control, reservoir control and circle control is improved.