35 results about "Fissure" patented technology

The invention discloses a rock mass structural plane parameter calculation method based on a drilling surrounding rock expansion map. The method comprises the steps that a deep learning semantic segmentation network is built to automatically recognize cracks in a drilling surrounding rock hole wall two-dimensional expansion map; processing the segmented fissure image of the pixel level, and eliminating miscellaneous points which interfere with subsequent operation and small fissures which do not influence the integrity of the surrounding rock; extracting a fracture skeleton line, and eliminating burrs on the skeleton line; for fractures with cross structures, adopting a fracture skeleton decoupling algorithm fusing topological connectivity and vector geometry criteria to adaptively separate the fractures; an implicit space mapping method based on a crack pixel sequence is adopted, non-modeling extraction of structural plane space geometric parameters in a borehole expansion diagram is achieved, and the structural plane space geometric parameters comprise the included angle between the structural plane trend and the hole axis and the structural plane dip angle. According to the method, the geometric features of the internal structural surface of the surrounding rock can be quantitatively represented, and the quantitative results are all within the allowable range of actual engineering errors.

The invention discloses a shield front karst fissure grouting plugging method based on feedforward identification and directional regulation and control, which comprises the steps of front geological information acquisition, target area identification, grouting path planning, parameter adaptive regulation and control, directional grouting execution and plugging effect feedback. Feature fusion processing of geometric features of the cavity region from a time domain to a frequency domain is realized, geological types and features of the cavity region are analyzed in combination with data, and remarkable reduction of cavity three-dimensional coordinate positioning errors and remarkable improvement of boundary recognition precision are realized; in the drilling process, the boundary of the cavity is sensed in real time, synchronous grouting and air exhaust are achieved through automatic deviation correction of the posture adjusting mechanism and the double-through-hole design, air pressure fluctuation in the cavity is controlled within a safe and stable range, and the risk of cavity collapse caused by air pressure changes is effectively prevented.

A method for quantitative description of a fault / fissure and a detection system thereof are provided, involving static and dynamic method and system for quantitative description. The present static method for quantitative description includes: according to spatial coordinate data of the fault / fissure, constructing a fissure ellipsoid that covers a spatial distribution scope of the fault / fissure; and characterizing the fault / fissure according to spatial geometric parameters of the fissure ellipsoid. And the present dynamic method for quantitative description includes: according to waveform parameters of elastic waves generated during rupture process, constructing a three-dimensional hypocenter ellipsoid that covers spatial radiation; and according to spatial geometric parameters of the ellipsoid, determining a hypocenter location, an energy level, and / or orientation of the fissure. The present application is more intuitive and simpler in quantitatively describing static geometric characteristics of the fissure and dynamic physical characteristics of the hypocenter.

The invention discloses a device and a method for evaluating the dynamic filtration performance of CO2-based fracturing fluid under high-temperature and high-pressure conditions. The evaluation device comprises a pressurizing system, a heating system, a circulating system, a core clamping system and a metering system which are connected in sequence. The process that CO2-based fracturing fluid is filtered from a crack to a stratum is simulated through the rock core clamping system, rock cores can be placed at the two ends of the simulated crack, and the filtration process of the CO2-based fracturing fluid under the conditions of different crack widths and crack wall surface roughness can be simulated by changing the positions of the rock cores at the two ends and the rock core end surface roughness.

This invention discloses a fissure grouting material, its preparation method, and its application, belonging to the technical field of radiation protection engineering materials. By mass, its raw materials include: 45-60 parts barite sand, 25-35 parts sulfoaluminate cement, 8-20 parts borax, 2-5 parts boron carbide powder, 1-5 parts nano-gadolinium oxide, 5-15 parts lithium slag powder, 3-8 parts barium sulfate whiskers, 3-8 parts polymer emulsion, 0.5-1.5 parts water-reducing agent, 0.1-0.5 parts stabilizer, and 18-25 parts water. This invention provides high-density gamma-ray shielding through barite sand, achieves all-round neutron protection through a quaternary composite neutron absorption system, enhances the material's toughness and shielding effect through barium sulfate whiskers, and ensures high fluidity and interfacial bonding strength of the grout through the polymer emulsion. This material is particularly suitable for sealing and shielding fissures in the surrounding rock of radioactive tunnels, possessing advantages such as excellent shielding effectiveness, good construction performance, high volume stability, and long-term durability.

The invention discloses an analogue simulation method and system for micro fracture fissure filling of osteoporosis, and belongs to the technical field of medical data acquisition, and the method comprises the following steps: S1, obtaining medical image data of a bone area; s2, extracting a micro-fracture fissure area image from the medical image data based on an image segmentation technology; s3, generating a corresponding three-dimensional skeleton model through a three-dimensional modeling technology based on the micro-fracture fissure region image; s4, micro-fracture fissure filling simulation is conducted according to the three-dimensional skeleton model in combination with the attributes of filling materials, and the mechanical response of a micro-fracture fissure area is calculated; and S5, determining a micro-fracture fissure filling result according to the mechanical response of the micro-fracture fissure area. According to the scheme, the micro-fracture fissure area image is extracted, the three-dimensional skeleton model is constructed, micro-fracture fissure filling simulation and mechanical response analysis are carried out in combination with the attributes of the filling material, the mechanical response of the filling material in the micro-fracture fissure can be accurately simulated, and the reliability of osteoporosis micro-fracture fissure filling simulation is improved.

The application discloses an oval foramen automatic detection and fine segmentation method based on an anatomic landmark gravity field and a tubular topology enhancement, and specifically relates to the technical field of medical image processing. Firstly, the head CT or MRI image to be processed is subjected to multi-modal space alignment and adaptive contrast enhancement; subsequently, the image is input into an anatomic landmark gravity field network, macroscopic landmarks of a skull base are extracted, a spatial gravity field matrix is constructed, and the model attention is adaptively focused on a small oval foramen high probability area; then, a multi-view tubular structure enhancement encoder is used to extract features of a three-dimensional hole track of the oval foramen, and the interference of non-penetrating bone depressions is inhibited; finally, a three-dimensional penetrating topology constraint mechanism is introduced in the decoding stage, so that the generated three-dimensional model of the oval foramen has correct anatomic connectivity. The application can effectively solve the detection problem of the oval foramen caused by the large individual variation, the small volume and the easy confusion with surrounding holes and fissures, and significantly improves the preoperative planning accuracy of trigeminal neuralgia puncture and other surgeries.

The invention discloses a microcosmic observation device and method for blocking a single fracture by inducing calcium carbonate precipitation through microorganisms, and relates to the technical field of geotechnical engineering and environmental microorganisms, the observation device comprises a main body, the main body is provided with a fracture, and the two ends of the main body are further provided with a first overflow groove and a second overflow groove, inner cavities of the first overflow groove and the second overflow groove are communicated with the crack, the first overflow groove is provided with a water inlet, the second overflow groove is provided with a water outlet, and a plurality of through holes communicated with the crack are formed in one side of the main body and one side of the first overflow groove and used for obtaining crack parameters. According to the method, a microcamera is used for shooting the precipitation generation process of calcium carbonate induced by microorganisms in a rough single fracture, and the relevance research of a microcosmic precipitation mechanism and a macroscopic seepage characteristic in a small fracture is realized in combination with the electrical resistivity, potential difference and inlet and outlet water pressure of a solution in the fracture.

The present invention provides a device for measuring the width of palpebral fissure, comprising: a measuring unit configured to accommodate and position the head of a person to be measured; a control unit configured to control the working state of the measuring unit; the measuring unit comprises a measuring cavity, a shooting module and a guide light module are arranged inside the measuring unit, wherein the guide light module guides the person to be measured to look at a preset direction; the shooting module comprises a parameter calibration step before acquiring the data to be processed, and the parameter calibration step is used to acquire the mapping relationship between a single pixel corresponding to the data to be processed and the actual size of the calibration object; the control unit controls the shooting module to shoot the face of the person to be measured to obtain the data to be processed; the control unit divides the data to be processed to obtain the pupil center coordinates and the upper eyelid contour coordinates; and compares the pupil center coordinates and the upper eyelid contour coordinates to obtain the palpebral fissure width measurement value. The device improves the convenience and accuracy of measuring the palpebral fissure width.

The invention provides a method for evaluating the improvement effect of the pressure bearing capacity of a stratum, and belongs to the technical field of oil and gas drilling, and the method comprises the following steps: S1, obtaining a fissure area reference value S < base > of a first original simulation core; s2, acquiring a fracture area test value S < test > of the second original simulated rock core after the plugging experiment; and S3, according to the fissure area reference value S < base > and the fissure area test value S < measurement >, calculating to obtain a fissure change rate ROC. According to the method, a real stratum is replaced by the self-made simulated rock core, the improvement effect of the plugging drilling fluid on the loading capacity of the simulated rock core is evaluated by comparing the fracture area change conditions of the internal cross section of the original simulated rock core before and after the plugging experiment, the method is simple, efficient and easy to operate, and the evaluation result is visual and reliable.

The invention discloses a tunnel construction crack water accurate detection method based on advanced parallel adit. During tunnel construction in a hard mountainous area, the geological environment in front of a main tunnel face is complex and changeable. The method comprises the steps that the position of a low-resistance area of a to-be-excavated area of a high-risk tunnel main hole is determined; the method comprises the following steps: respectively measuring multiple groups of fracture structural surfaces in exposed rock masses of an advanced parallel adit and a main tunnel face of a tunnel, and screening out dominant fracture structural surfaces from the multiple groups of fracture structural surfaces; comparing the occurrence information of the dominant fracture structural surfaces of the advance parallel adit and the tunnel main hole tunnel face, when the differences between the trends and the inclination angles of the dominant fracture structural surfaces of the advance parallel adit and the tunnel main hole tunnel face are smaller than acute angles, averaging the trends and the inclination angles, and taking the averaged trends and inclination angles as the occurrence information of the penetrating fracture structural surfaces; and the fracture water gushing position of the to-be-excavated area of the main tunnel is calculated. The problems that high-risk tunnel advanced parallel adit utilization is insufficient, and prediction of the fracture water gushing position of the to-be-excavated area of the main tunnel of the tunnel is inaccurate are solved.

The invention provides an underground cave depot fissure surrounding rock seepage control and grouting water stop method, and belongs to the technical field of underground water sealing cave depots. The method comprises the steps that a two-dimensional fissure network underground water mathematical model of a reservoir area underground water seepage field is established; simulating and calculating the water inflow in the construction period and the operation period; a linkage relation among hydrogeological conditions, grouting seepage control indexes and water inflow calculation is constructed, and the proportion of pre-grouting to post-grouting and a grouting area are designed; a three-dimensional geological comprehensive analysis platform is utilized to analyze an unfavorable geologic body and a permeable structure in advance and take targeted prevention and control measures in advance; the arrangement of pre-grouting drill holes is determined, and pre-grouting is conducted; after the primary pre-grouting drilling is finished and the slurry is finally set, an inspection hole is drilled, and the water seepage amount in the inspection hole is observed; the arrangement of post-grouting drill holes is determined, and post-grouting is carried out; and the post-grouting effect is verified. The system has the technical effects of reasonable design, high systematicness, high reliability, convenience in operation, low cost, wide application range and the like.

The present application belongs to the field of water resources development and prevention technology, and specifically relates to a test device and method for determining the direction of fissure dominant seepage, comprising a water injection system for injecting tracer solution into the fissure and a multi-directional conductivity monitoring system for obtaining the borehole, the water injection system comprising a tracer supply device and a borehole target depth water injection device, and the multi-directional conductivity monitoring system being used for real-time recording and display of the multi-directional groundwater tracer concentration in the borehole. The direction of fissure dominant flow at any depth is determined according to the vector synthesis of conductivity in different directions. The method is simple and easy to operate, has high operability, and can quickly and efficiently determine the direction of fissure dominant flow, thereby providing a theoretical basis and technical support for the fields of underground resource development and utilization, groundwater resource assessment and protection, environmental engineering, geological disaster prevention, and geothermal energy development.

This invention relates to the field of karst landform surveying technology, specifically providing a device for surveying the depth of underground cavities or fissures in karst landforms. The aim is to overcome the shortcomings of existing technologies and solve problems such as the pendant component easily getting stuck when falling into the fissure, and the device's adaptability to holes or fissures of different sizes or orientations. The invention comprises several main parts, including a support mechanism with a position adjustment mechanism, a measuring mechanism connected to the support mechanism, and a power mechanism connected to the measuring mechanism. The support mechanism and the position adjustment mechanism enable the device to adapt to holes or fissures of different sizes or orientations. The measuring mechanism uses a pendant component, which is lowered into the hole or fissure via a measuring rope. The power mechanism provides the power to wind and pull the measuring rope.

The invention belongs to the technical field of underground engineering, and discloses a tunnel fracture rock mass grouting diffusion radius and hole arrangement design method and system.The method comprises the steps that a tunnel fracture three-dimensional model is established within a grouting range, a fracture fitting surface is obtained according to the model, the circle center of the fracture fitting surface is obtained, the circle center is projected on a tunnel face, and fracture surface projection points are obtained; clustering and grouping all the fracture surface projection points, and establishing a minimum coverage circle of each clustering group to obtain the circle center coordinate and radius of the minimum coverage circle; in each minimum covering circle, the relation between the slurry diffusion radius and the grouting hole distribution positions and number is established; iterative optimization is conducted on the grout diffusion radius and the grouting hole distribution number, and the optimal grout diffusion radius and the optimal grouting hole distribution number are obtained. According to the method, subjectivity in a traditional design method is effectively reduced, scientificity and accuracy of a grouting scheme are improved, and therefore the grouting reinforcement effect and economic benefits are improved.

The invention discloses a deep stratum native fracture slurry filling pressure judgment device and a grouting pressure judgment method thereof.The deep stratum native fracture slurry filling pressure judgment device comprises a grouting hole formed in a foundation and further comprises grouting equipment arranged at the grouting hole and used for conducting grouting on the positions, with different depths, of the grouting hole; the multiple groups of detection holes are uniformly distributed around the grouting holes; the pressure judgment units are arranged in the detection holes and used for judging the grouting filling pressure, through arrangement of the detection holes and the pressure judgment units, the pressure judgment range can be more accurately reduced, and therefore the situation that the filling effect cannot be achieved due to the fact that the grouting pressure is too small is avoided; and grouting material waste caused by too high grouting pressure can be avoided, effective treatment is achieved, and cost is saved.

The invention discloses an accurate classification and identification and targeted grouting plugging method for drill hole fractures. The method comprises the following steps: selecting three hole groups in bedding drill holes or crossing drill holes; searching cracks in the target drill hole by using an endoscope and numbering the cracks; preliminarily identifying the through condition of the three-hole group by adopting a rough sorting detection assembly; a subdivision detection assembly is assembled in the target drill hole, the capsule hole packer B and the capsule hole packer C are made to plug the two sides of the ith crack, a detection cavity is formed, and subdivision identification is conducted on the crack type in the target drill hole; all fractures in the target drill hole are identified and recorded; a retreating mode is adopted, a discharging opening of a grouting pipe is accurately aligned with each through type crack based on the identification and recording result, and targeted grouting plugging operation is conducted; and after the cement mortar is dried, gas in the coal seam is extracted. According to the method, accurate classification identification and targeted plugging can be carried out on fractures, efficient gas extraction operation can be achieved, and the probability of safety accidents can be reduced.

The invention provides a method for applying a fractured rock slope fractured water head based on a finite difference method, and relates to the technical field of slope stability and geological disasters, and the method comprises the following steps: determining a slope calculation model according to geological data, setting the vertical direction of a slope as a Z direction, and carrying out grid division; the divided model is imported into FLAC3D software, and grid units are grouped; boundary conditions are set, parameters are assigned, self-weight stress balance calculation is carried out, and a result is stored; traversing grid nodes by using the stored calculation result file, and obtaining the maximum value and the minimum value of the elevation of each fracture through node coordinate values; the height of each fracture is calculated according to the maximum values and the minimum values, and the elevation range of water head application in each fracture is determined according to the set water head application height; and traversing all the grid nodes again, and judging whether the grid nodes are fracture grid nodes or not. The invention provides a simple and convenient method for analyzing the stability of the fractured rock slope in FLAC3D under the rainfall effect.

The present invention discloses a method for automatically locking the optimal sulcus segmentation threshold based on corrected images and identifying the sylvian fissure in combination with its anatomical location, belonging to the field of medical image processing technology. Based on threshold segmentation, this method extracts candidate regions based on the anatomical location of the sylvian fissure. The sylvian fissure is extracted within the corresponding anatomical region. For cases where lesions occupy the sylvian fissure, the abnormal side is fitted based on the sylvian fissure obtained from the normal side segmentation to obtain a sylvian fissure segmentation result for the entire brain. This method is applicable to CT plain scan (NCCT) and perfusion (CTP) images, and is suitable for batch, rapid, automated, and accurate identification of various brain shapes across multiple hospitals, multiple devices, and various brain shapes, and has important clinical significance.

The utility model relates to a sample structure capable of directly manufacturing a rock mass with a fissure surface, which belongs to the technical field of geotechnical engineering survey, and comprises a rock mass drilling device, the rock mass drilling device consists of a sampling drill bit, a first sleeve and a second sleeve, and a three-section mold assembly is arranged between the first sleeve and the second sleeve; the three-section mold assembly comprises a fixing ring and a three-section mold, the fixing ring is connected to the middle of the three-section mold in a sleeving mode, the two sides of the three-section mold are inserted into the inner side of the first sleeve and the inner side of the second sleeve respectively, and the two sides of the fixing ring are in threaded connection with the first sleeve and the second sleeve respectively. According to the sample structure capable of directly manufacturing the rock mass with the fissure surface, the rock sample does not need to be secondarily processed, the sample preparation is convenient and fast, the fissure surface almost similar to the natural state can be obtained, the state of the sample better conforms to the actual situation, meanwhile, water seepage holes can be added according to needs, and the obtained sample can also be used for a seepage test.

The invention discloses a treatment method for a karst tunnel located in an underground water vertical seepage zone and a seasonal variation zone. The treatment method comprises the following steps that firstly, field checking and treatment are conducted; step 2, karst characteristics and surface water seepage paths of disease sections; 3, extracting data features; 4, analyzing a fracture network topological structure; 5, systematic water interception and drainage measures of the drainage tunnel are taken; soil conductivity distribution data are obtained through a transient electromagnetic method, reflection coefficient data are detected through a geological radar method, a fracture-seepage characteristic spectrum is obtained through time synchronization alignment, and a quasi fracture-seepage characteristic matrix is generated for the fracture-seepage characteristic spectrum through a social range. Then the standardized fracture-seepage characteristic matrix is converted into a visible topological graph, and observation is facilitated; precise prevention and control of diseases are achieved by establishing a technical system of water detection, reason analysis, graded treatment and three-dimensional interception, and a three-level progressive technical path is constructed in the treatment stage.

The application discloses a kind of rock mass seepage mass transfer simulation advantage path identification and extraction method of fusion fissure-matrix influence.First, the three-dimensional geometric characteristic parameters of fissure network are obtained, a random three-dimensional discrete fissure network model, i.e.the original model Full-DFN of fissure rock mass is generated.Second, the fissure network is structured modeling, the intersection of fissure surface and fissure is respectively abstracted as the two vertex sets of two-part graph, the mapping relationship between "fissure surface-line" is established;Further, the weighted calculation of fissure length, opening, permeability multi-parameter constraint, the advantage path in the process of seepage mass transfer is identified and extracted;Then, the simplified fissure rock mass submodel Sub-DFN is constructed.Finally, the fissure surface of Sub-DFN and Full-DFN is triangulated, the rock matrix is tetrahedral meshing, and the grid element is data conversion, the fissure-matrix rock mass submodel Sub-DFM and the fissure-matrix rock mass full model Full-DFM are obtained, and then seepage and mass transfer simulation analysis is carried out.

The invention provides a tunnel face joint fissure recognition method based on semi-supervised learning, and relates to the field of tunnel engineering.The tunnel face joint fissure recognition method comprises the steps that training images of tunnel face joint fissures are collected and marked, a first training set is constructed, and a second training set is constructed after the images are subjected to enhancement preprocessing; segmenting the second training set image by using a semantic segmentation model, obtaining a joint fissure space region, and performing multi-scale feature extraction; building a deep learning model introducing a semi-supervised learning framework, and training by using the feature map and the regional mask to obtain a prediction model; performing segmentation and feature extraction on a to-be-identified image, and inputting the image into the prediction model to obtain a region mask; skeletonization, connected domain analysis and multi-scale feature extraction are carried out based on the joint fissure mask prediction result, and the length and the inclination angle of the joint fissure are calculated to complete recognition.

The invention discloses a visual evaluation system and method for pulverized coal retention-proppant failure in a fracturing fissure, and the system comprises a transparent fracturing fissure model which comprises a transparent box body and a piston, a containing cavity is formed in the transparent box body, the piston is installed in the containing cavity, the piston divides the containing cavity into a first cavity and a second cavity, and the first cavity is communicated with the second cavity; the coal rock slice is fixedly connected to the piston, the second cavity is filled with proppant particles, and the first injection assembly is configured to inject liquid, solid and gas into the second cavity to form gas-liquid-solid mixed liquid; the second injection assembly is configured to inject liquid into the first cavity so as to push the piston to move towards the second cavity; the three-phase separator is communicated with the third port and is configured to perform gas-liquid separation on the gas-liquid-solid mixed liquid in the second chamber; and the at least two optical microscopes are arranged on at least two end face sides of the transparent fracturing crack model and are configured to be used for observing flow field characteristics and propping agent behaviors of at least two end faces of the transparent fracturing crack model.

The invention provides an experimental method and system for the influence of hydraulic fracturing fractures on coal and rock mass.The method comprises the steps that a plurality of fractured rock samples containing prefabricated fractures are prepared, fracture parameters of all the fractured rock samples are not completely the same, a complete rock sample is prepared as a control group, and the control group is used for determining the influence of hydraulic fracturing fractures on the coal and rock massability; the fracture parameters comprise at least one of the fracture number, the fracture half length, the fracture connectivity rate and the fracture inclination angle; the hob is driven to perform cutting rock breaking operation on the rock sample, and propulsive force data and torque data in the operation process are collected; based on the propulsive force data and the torque data, the influence rule of the fracture parameters on the coal rock mass cuttability is analyzed, and analysis includes calculation of at least one of the mean propulsive force, the mean torque and the rock breaking specific energy consumption. According to the invention, a set of experimental scheme capable of systematically and quantitatively researching the influence rule of single or composite fracture parameters on the coal rock mass cuttable property can be provided, and solid experimental data support and theoretical guidance are provided for accurate design and parameter optimization of an underground hydraulic fracturing weakening technology.

The application belongs to the technical field of underground engineering, and discloses a tunnel fissure rock mass grouting diffusion radius and hole arrangement design method and system, which comprises the following steps: a three-dimensional model of tunnel fissure is established within the grouting range, a fissure fitting surface is obtained according to the model, a center of the fissure fitting surface is obtained, the center is projected on the tunnel face to obtain a fissure surface projection point; all the fissure surface projection points are clustered and grouped, and a minimum covering circle of each cluster group is established to obtain the center coordinates and the radius of the minimum covering circle; the relationship between the slurry diffusion radius and the grouting hole position and quantity is established in each minimum covering circle; and the slurry diffusion radius and the grouting hole quantity are iteratively optimized to obtain the optimal slurry diffusion radius and the grouting hole quantity. The application effectively reduces the subjectivity in the traditional design method, improves the scientificity and accuracy of the grouting scheme, and thus improves the effect and economic benefit of grouting reinforcement.

The application provides a method for preventing fissure water from gushing in underground structure construction, comprising the following construction steps: S1, before the underground structure construction, using the geological radar technology to survey and identify potential fissures, so as to determine the accurate position, size of the fissure area and the physical properties of the soil; S2, according to the depth and density of the fissure area surveyed in the early stage, selecting the matching soil squeezing pile mechanical equipment to construct the soil squeezing pile in the fissure area; S3, in the fissure area, using the soil squeezing pile construction machinery to inject the soil layer by layer, and controlling the progress and construction speed of the soil squeezing pile. The application uses the extrusion pile as the means for preventing the fissure water from gushing, adjusts the construction parameters of the soil squeezing pile according to the survey data in the early stage through the adaptive extrusion mechanical equipment, realizes the accurate extrusion and compaction of the soil, forms the dense support layer, overcomes the shortcomings of the traditional method in adapting to the complex geological conditions, improves the bearing capacity of the soil, ensures the stability of the overall underground structure, and effectively prevents the potential fissure.

The present application provides a kind of rock mass mesoscopic fissure test method and system, including the surface image in the process of loading rock mass is collected, and the acoustic emission data set containing three-dimensional coordinates, time, energy, the surface discrete strain field is solved using digital image correlation method, and the strain concentration area is extracted by the second invariant of partial curvature and threshold value;With the surface principal strain of characteristic time as reference, the anisotropic space-time distance of acoustic emission event is calculated and clustered, and independent event cluster is divided, the strain concentration area is spatially paired with acoustic emission cluster, respectively calculate spatial form compliance, time evolution synchronization degree, with spatial form compliance is modulated by synchronization degree, and combined with the maximum principal strain value is conditionally weighted correction, obtain matching confidence, when confidence exceeds the discrimination threshold, determine that the paired object is real rock mass mesoscopic fissure, can realize fissure reliable identification by synchronously coupling surface deformation and internal damage.

The application discloses a kind of complex topography material two-dimensional circle unit model generation methods containing hole and fissure, comprising the following steps: based on Boolean operation, draw two-dimensional complex topography material model containing hole and fissure;Set circle unit parameter, generate initial circle unit in two-dimensional complex topography material model, obtain initial two-dimensional circle unit model;Based on circle unit non-continuous deformation analysis method, calculate circle unit displacement increment by enlarging circle unit, update circle unit position, repeat operation until the radius of all circle units reaches the preset radius range;Continuously calculate circle unit displacement increment and update circle unit position, obtain final two-dimensional circle unit model.The application can quickly generate specified circle unit packing density, the distribution form and range of circle unit radius, contain any hole and fissure, and have complex boundary high-quality two-dimensional circle unit model.The principle of the method of the application is simple, and the calculation is efficient, which can significantly reduce the numerical simulation modeling cost of circle unit.