15 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 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 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 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 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 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 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.

The application discloses a hydraulic fracture face reproduction and combined proppant conductivity testing method, which comprises the following steps: preparing a cylindrical sample and a flow guide plate body from obtained downhole cores, pouring concrete outside the cylindrical sample to form a standard cubic sample, and performing a hydraulic fracturing experiment on the standard cubic sample; performing three-dimensional laser scanning on the fracture of the cylindrical sample to extract a hydraulic fracture face, and carving the upper flow guide plate fracture face or the lower flow guide plate fracture face according to the extracted hydraulic fracture face; installing the upper flow guide plate fracture face and the lower flow guide plate fracture face in a flow guide chamber to perform a flow guide test, and calculating a proppant embedding degree value and a proppant crushing rate according to the test result. The application extracts the fracture face after the hydraulic fracturing experiment through three-dimensional laser scanning, obtains a numerical fracture face, carves a plurality of groups of flow guide plates with the same hydraulic fracturing fracture face by using a carving machine, and can truly obtain the flow guide capacity and embedding degree of mixed proppants of different quality quartz sand and ceramsite in the well.