44 results about "Rock engineering" patented technology

The present disclosure relates to the technical field of stability control of surrounding rock of tunnelling, and provides an excavation compensation method for tunnelling in deep rock engineering, including: acquiring an engineering geological information of the tunnelling in deep rock engineering; determining an engineering hazard type based on the engineering geological information; determining an excavation compensation support strategy for the surrounding rock of the tunnelling in deep rock engineering based on the engineering hazard type; and performing a supplementary support control on the surrounding rock of the tunnelling in deep rock engineering based on the excavation compensation support strategy. Through the supplementary support strategy, the difference value between a radial stress of the surrounding rock of the tunnelling in deep rock engineering and an initial crustal stress can be reduced to within a preset approximate value range, further effectively preventing a stress concentration phenomenon occurred in a tangential stress.

The present application belongs to the field of rock burst risk assessment of deep rock engineering, and particularly relates to a quantitative evaluation method for rock burst tendency of surrounding rock under multiple disturbances, which comprises the following steps: obtaining the distribution depth of excavation damage zone through acoustic testing, and obtaining the average wave velocity of rock mass in the range of original rock zone; obtaining the geological strength index and disturbance factor through the average wave velocity; further obtaining the residual elastic energy of surrounding rock based on the geological strength index and disturbance factor, and evaluating the rock burst tendency of surrounding rock through the residual elastic energy of surrounding rock; the acoustic testing points of surrounding rock are unchanged, and the rock burst tendency of surrounding rock is evaluated after each excavation footage of the working face is completed, until the distribution characteristics of rock burst tendency no longer change obviously, which is taken as the long-term evaluation result of rock burst tendency of surrounding rock. The quantitative evaluation formula of rock burst tendency of surrounding rock considers the rock mass structure effect, which is reflected in the geological strength index, and considers the excavation disturbance effect, which is consistent with the actual situation of engineering construction process, and has strong practicability.

The invention relates to the technical field of boosting engineering, in particular to a compact booster station spatial layout method and system for a mountain wind power plant. The method comprises the following steps: acquiring topographic data of a booster station area; performing data preprocessing based on the topographic data of the booster station area, including abnormal point elimination and elevation normalization, to obtain to-be-processed station area information; according to the station area information to be processed, generating a step type platform mother shape; analyzing the slope stability based on the step type platform mother shape; determining the drainage smoothness degree according to the slope stability; determining a candidate site area according to the slope stability and the drainage smoothness degree; determining a booster station compaction scheme based on the candidate site area; establishing a cable trench route according to the booster station compaction scheme to obtain cable trench route data; calculating the earth-rock engineering quantity based on the cable trench routing data; and the foundation bearing capacity is checked based on the earthwork engineering quantity. The space utilization rate of the mountain wind power plant booster station is improved based on the boosting engineering technology.

The utility model belongs to the technical field of earth-rock engineering, and particularly discloses a reinforcing steel bar cutting device for earth-rock engineering construction, which comprises a device table, a conveyor is fixedly mounted on the device table, a rock wool cushion is arranged on one side of the conveyor, a positioning mechanism for stabilizing reinforcing steel bars is arranged on the conveyor, and the device table is fixedly mounted on the device table. A shifting frame is slidably connected to the inner side of the device table, a rotating shaft is rotatably connected to the inner surface of the shifting frame through a driving mechanism, and a blade is arranged at the end, close to the shifting frame, of the rotating shaft. According to the reinforcing steel bar cutting device for earth-rock engineering construction, the cutting protection mechanism is additionally arranged, an arc-shaped cover plate covers the periphery of the cutting portion of a reinforcing steel bar in the reinforcing steel bar cutting process, sparks and chippings generated in the cutting process are effectively shielded, and the risk that the sparks splash to damage nearby electrical equipment is greatly reduced through the design; the possibility that workers are scalded is avoided, meanwhile, the dust concentration in the air is reduced due to splashing of chippings, and the working environment is improved.

This invention relates to the fields of computational mechanics and rock engineering, and particularly to a numerical simulation method for end-anchored rock mass engineering based on DDDA (Digital Directed Amplification and Analysis). The method includes: constructing a circular element discontinuous deformation analysis numerical model according to actual engineering conditions; performing discontinuous deformation analysis numerical calculations; analyzing the calculation results of the unanchored model to preliminarily determine the anchoring scheme; performing discontinuous deformation analysis numerical calculations again; determining whether the model contains unstable blocks, adjusting the anchoring scheme, and repeating the aforementioned steps until the model stabilizes, thus completing the design of the rock mass engineering anchoring scheme. This invention establishes a numerical simulation method capable of accurately simulating the interaction between anchor bolts (anchor cables) and rock mass, and integrating anchoring scheme design, stability assessment, and dynamic parameter optimization functions. It achieves accurate prediction of the deformation and failure behavior of anchored rock mass and optimizes anchoring design, featuring high simulation accuracy and strong practicality.

The application provides a method and device for correlatively characterizing stress drop and micro cracks of granite joints under multiple working conditions, computer equipment and a readable storage medium, relates to the technical field of deep hard rock engineering mechanics and geological disaster warning, and the method comprises the following steps: constructing a Voronoi-GBM numerical model; constructing a multi-objective optimization function for optimizing multiple micro mechanical parameters; optimizing the micro mechanical parameters of the Voronoi-GBM numerical model based on the multi-objective optimization function; simulating the operation of multiple granite shear working conditions by using the optimized Voronoi-GBM numerical model; and taking the micro crack characteristic parameters as input samples and the macro stress drop characteristic parameters as output samples, and training a target correlation characterization model. The scheme can effectively mine the correlation characterization of stress drop and micro cracks of granite joints, and realize the prediction of macro stress drop behavior from the micro crack characteristics.

The invention discloses an instability failure simulation method for a soft and hard interbedding counter-tilt slope under a rainfall condition, and relates to the technical field of rock mechanics and rock engineering. The method comprises the following steps: constructing an FDEM numerical model of a target soft and hard interbed counter-dip slope; setting boundary conditions for the numerical model, and applying initial gravity until a stress balance state is reached; based on the numerical model of stress balance, rainfall simulation is executed; according to a rainfall simulation result, judging whether slope instability failure occurs or not; if the slope instability failure does not occur and the load increasing condition is met, executing gravity load increasing simulation until the slope instability failure occurs while the rainfall simulation is maintained; and according to the critical gravity load when the slope is unstable, determining the slope safety coefficient of the target soft and hard interbed counter-tilt slope under the rainfall condition. According to the invention, fine simulation of the whole deformation and instability process of the soft and hard interbedding counter-dip slope under the rainfall condition can be realized.

The invention discloses an earthwork engineering quantity calculation method and device based on a geologic model. The method comprises the steps of obtaining an initial geologic model corresponding to a project, designing an elevation surface and a partition boundary, and obtaining point cloud data obtained by project field scanning; generating a first geologic model; based on the design elevation surface and the partition boundary, performing partition processing on the first geologic model to form a partition geologic model, and determining an expected excavation geologic body of each partition; determining a current situation terrain surface based on the point cloud data, segmenting each expected excavation geologic body of each partition into an upper part and a lower part by using the current situation terrain surface, and performing grid repair on the grid corresponding to the excavated geologic body and the grids corresponding to the remaining geologic bodies when a second preset condition is met to obtain a repaired geologic model; and determining the earth-rock engineering quantity based on the repaired geologic model. According to the method, the efficiency and the accuracy of calculating the earthwork amount in civil engineering construction are improved.

A rock engineering structure support system employing mechanical fastening of adjacent mesh assemblies. A steel based support assembly that can be manufactured without field welding includes a plurality of crimped joints of different sizes and shapes for replacing welding to achieve connections between steel assemblies. Each crimped joint mechanically couples two or three steel members together, such as coupling a perimeter steel member of one steel assembly with a perimeter steel member of an adjacent steel assembly. Each crimped joint includes a body having two or more arcuate recessed surfaces each for receiving one steel member. In a first configuration of the crimped joint, a pair of spaced apart arms extend from the body and define an opening through which a steel member is passed and seated in the recessed surfaces. A deforming force is applied to the two arms to deform the body into a second configuration in which the arms abut or nearly abut at outer tips or ends.

The utility model relates to the field of earth-rock engineering, and discloses a gravel screening device for earth-rock engineering construction, which comprises a box body, a disassembly and assembly component is arranged in the box body, a feeding mechanism is arranged at the rear end of the top of the box body, the feeding mechanism comprises a feeding hopper, the feeding hopper is fixedly arranged at the rear end of the top of the box body, and a discharging hopper is arranged at the rear end of the top of the box body. A fixed plate is fixedly installed on the front portion of the feeding hopper, a contraction groove is formed in the fixed plate, a baffle is movably installed at the position, penetrating through the bottom of the fixed plate and located in the contraction groove, of the fixed plate, and a plurality of guide rail grooves are formed in the front portion of the baffle; and a first screw rod is movably mounted at the top of the baffle plate and penetrates through the top of the fixed plate. Through sliding of a first screw rod and a baffle, the feeding amount of the gravel is convenient to adjust, and the situation that screening of the gravel at the upper end is affected due to thick gravel accumulation is prevented; through a clamping seat and a second screw rod, the sieve plate can be conveniently and quickly disassembled, assembled and cleaned, and sieve plates with different pore diameters can be replaced.

The utility model discloses an earth-rock engineering transport vehicle access registration system, which relates to the technical field of engineering control, and comprises a main control device which is respectively in signal connection with an exit registration device, an entrance registration device, a network module and a barrier gate device, and the exit registration device comprises an exit identification device and an exit snapshot device. The entrance registration device comprises an entrance identification device and an entrance snapshot device. According to the utility model, the exit snapshot device and the entrance snapshot device are arranged to photograph and record the appearance, cargo loading and the like when the vehicle enters and exits the parking lot, so that the vehicle information registration is more comprehensive; through signal connection between the master control device and the exit registration device, the entrance registration device and the barrier gate device, automatic identification of vehicle information and automatic control of the barrier gate are realized. When the vehicle arrives at the entrance and exit, the exit identification device and the entrance identification device can rapidly identify vehicle information and transmit the vehicle information to the master control device to control a barrier gate switch, so that the vehicle entrance and exit management efficiency and the authenticity and objectivity of the entrance and exit information are improved.

A layered structure roadway cement mortar physical model preparation method of rock-like material belongs to the field of rock mass mechanics and rock engineering, and steps are as follows: 1. According to the engineering site situation and the predicted size, a mold is made, and a preset roadway hole is drilled on the required unit plate in advance, and then combination is carried out; 2. The roadway model is made, and after the mold combination is completed, it is inserted along the opposite preset roadway hole, and the combined mold is prepared; 3. The combined mold is placed on the telescopic support device; 4. The inner wall of the mold and the outside of the roadway model are coated with release agent, and the rock-like material is poured layer by layer, the existence of layered joints is highlighted, and the surface is scraped after vibration and compaction; 5. Demoulding and curing, and the layered structure roadway cement mortar physical model is obtained. The preset roadway hole on the mold ensures the similarity between the poured physical model and the deep metal mine layered rock roadway; the model prepared by using cement mortar reduces the difficulty and cost of obtaining the layered rock.

The invention relates to the technical field of underground engineering safety, in particular to a rockburst prevention and control method for deep rock engineering, and the method comprises the steps: S1, collecting initial information; and S2, rock burst risk and position initial evaluation. And S3, excavation and energy reduction. And S4, re-evaluating the rockburst risk. And S5, releasing energy of the high-energy risk grade rockburst. And S6, energy absorption optimization design of the supporting system is carried out. Through a six-step systematic design process in the whole process, the change of rockburst prevention and control from experience judgment to quantification, process and systematization is realized; according to the method, key parameters needing to be collected and engineering measures needing to be taken in all stages are defined, and a quantitative calculation method for the rockburst grade, the energy grade and the supporting energy absorption capacity is provided.

The invention relates to the technical field of tunnel engineering intelligent perception and surrounding rock grading, and discloses a mountain tunnel surrounding rock grade automatic identification method, system and device based on image-point cloud fusion, and a storage medium. The automatic mountain tunnel surrounding rock grade identification method based on image-point cloud fusion comprises the following steps of multi-source surrounding rock perception data acquisition, surrounding rock image apparent semantic feature extraction, surrounding rock point cloud geometric state feature extraction, surrounding rock evaluation unit construction and image-point cloud feature fusion, surrounding rock engineering state comprehensive evaluation and grade identification. And surrounding rock grade zoning and result output. According to the invention, through image-point cloud fusion, a continuous evaluation unit is constructed along the axial direction of the tunnel, and the surrounding rock grade is automatically identified and output; according to the method, the objectivity and consistency of surrounding rock grade identification are improved, continuous sensing and grading of surrounding rock states are realized, the real-time performance of acquiring surrounding rock grade information is improved, deep fusion and engineering output of multi-source information are realized, and the method has good engineering applicability.

The utility model discloses a dust fall device for earth-rock engineering construction, which comprises a moving seat and a water pipe, the top of the moving seat is fixedly connected with a water tank, the top of the water tank is provided with an adjusting component, and the top of the water tank is provided with a pick-and-place component. The adjusting part comprises a first rotating shaft connected with the top of the water tank, a first shifting plate fixedly connected with the outer side of the first rotating shaft, a rotating plate fixedly connected with the outer side of the first rotating shaft, a vertical plate fixedly connected with the top of the water tank and a first spring arranged between the vertical plate and the rotating plate; by arranging the moving seat, the water conveying pipe, the water tank, the adjusting part and the taking and placing part, the problems that although an existing dust falling device can spray dust on a construction site during use, the spraying range of a spraying pipe is limited during dust falling, the dust falling effect becomes low, meanwhile, the position of the spraying pipe is fixed, and the dust falling effect is poor are solved. And the device is inconvenient to take down to be held by a worker for spraying and dust falling, so that the practicability is reduced.

The utility model relates to the technical field of sand screening devices, and discloses a sand screening device for earth-rock engineering construction, which comprises a working table, a self-cleaning sand screening mechanism is arranged at the top of the working table, a supporting mechanism is arranged at the bottom of the working table, the self-cleaning sand screening mechanism comprises a supporting seat I and a supporting seat II, and the supporting seat I and the supporting seat II are arranged on the working table. The first supporting seat and the second supporting seat are both fixedly installed on the top of the workbench, and protruding seats are fixedly installed on the top of the first supporting seat and the top of the second supporting seat. Through the design of the belt pulley I, the rotating shaft can be driven by the transmission of an external belt to rotate, and through the design of the spring, the sand screening barrel can be continuously knocked by the rubber rod in the rotating process of the rotating shaft, particles blocked on the sand screening barrel are promoted to fall off, the automatic cleaning function is realized, the manpower consumption is reduced, and the working efficiency is improved. And through the design of the wear-resistant paint layer, the wear-resistant performance of the rubber rod can be improved, and the service life of the rubber rod is prolonged.

The invention discloses an earthwork filling quality detection device and method. A base of the device is provided with a walking mechanism used for realizing movement of the device in a detection site; the hydraulic drilling and sampling mechanism is mounted on the base, and the hydraulic drilling and sampling mechanism is used for drilling filled earth-rock engineering and collecting earth-rock samples; the sample collecting and weighing mechanism is used for receiving the earthwork sample and weighing the mass of the sample; the moisture content detection mechanism detects the moisture content of the sample; the control unit controls the operation of the hydraulic drilling and sampling mechanism, the sample collecting and weighing mechanism, the moisture content detection mechanism and the walking mechanism, and the control unit receives data transmitted by the sample collecting and weighing mechanism and the moisture content detection mechanism, calculates a compactness index and outputs a detection result. According to the invention, the problems of high labor intensity, low efficiency and inaccurate result caused by poor sample representativeness in the existing earth and stone filling compaction degree detection are solved.

The utility model relates to the technical field of rock engineering experiments, and mainly discloses a rock compression-resistant end face flatness testing device, which comprises a leveling base, a vertical rod, a dial indicator and a sample clamp, leveling bolts are arranged at four corners of the base to establish an absolute horizontal reference plane, the vertical rod is vertically fixed on the base, and the sample clamp is connected with a fixed seat through a rotating rod. Clamping bolts which are uniformly distributed in the circumferential direction of the rotating rod are adaptive to fixation of test pieces with different sizes, the dial indicator is mounted on the sliding seat through a three-axis universal bracket, a ball is embedded at the tail end of a measuring head to reduce friction loss, a spring locking mechanism is arranged in the rotating rod, and the rotating rod is self-locked and positioned after being pressed and rotated; according to the utility model, the height difference interference of the test piece is eliminated through the reference surface separation design, the double-end-face rapid detection is realized by combining the overturning clamping mechanism, the problems of reference surface deviation, tedious operation and easy damage of the measuring head in the traditional method are solved, and the rock end face flatness detection precision and efficiency are obviously improved.

The utility model relates to the technical field of earth-rock engineering, and discloses an earth-rock engineering pay-off tool which comprises a base and a pay-off device, the pay-off device is arranged at the upper end of the base, mounting frames are fixedly connected to the periphery of the lower end of the base, wheel shafts are fixedly connected to one sides of the four mounting frames, and the wheel shafts are fixedly connected to the other sides of the mounting frames. The outer surfaces of the four wheel shafts are all sleeved with roller frames, one sides of the four roller frames are all rotationally connected with multiple sets of moving wheels, the periphery of the lower end of the base is all rotationally connected with first lead screws, the outer surfaces of the four first lead screws are all in threaded connection with movable rods, and one sides of the four mounting frames are all fixedly connected with sliding rods. When the device moves in an area with a complex terrain, the device can move on a rugged road surface more conveniently by releasing limitation of the roller carriers and utilizing the roller carriers and the moving wheels with larger wheel track, and the difficulty of carrying the device is reduced.

The application discloses a kind of based on ultrasonic wave attenuation characteristics pillar load quantitative inversion and safety diagnosis method, belong to rock engineering safety monitoring and nondestructive testing technical field.First, construct the rock sample with different fracture characteristics, carry out loading test under different load and obtain multi-band time domain signal, obtain the attenuation value under different load grade to construct the quantitative relationship model of different frequency band;Statistical pillar fracture characteristic parameters, obtain its attenuation value under each frequency band;Substitute into quantitative relationship model, carry out multi-band data fusion inversion, obtain the current equivalent load of pillar;Calculate safety factor, combined with the stability quantitative evaluation standard constructed, carry out quantitative diagnosis to target pillar stability.The application uses ultrasonic wave attenuation characteristics, improves diagnosis sensitivity and accuracy;Discard single frequency pulse, adopt sweep excitation technology can simultaneously identify the coupling mechanism of load action and fracture characteristics;Overcome the limitation of single factor, realize quantitative judgment.

The invention provides a reaming device for rock engineering investigation, and relates to the field of engineering investigation. The reaming device for rock engineering investigation comprises a placing plate, a reaming structure is arranged at the center of the upper end face of the placing plate, a collecting and processing structure is arranged on the upper end face, located on the front side of the reaming structure, of the placing plate, and supporting structures are arranged at the positions, close to the four opposite angles, of the center of the lower end face of the placing plate correspondingly. By arranging the collecting and processing structure, the front-back position of a first sliding block in a first sliding groove is controlled to be adjusted in the using process, so that the front-back position of a reaming structure can be adjusted, and in the using process, two connecting bandages are connected to the side wall of a protective sleeve under the bonding effect of two hook-and-loop fasteners; in addition, the telescopic length of the folding pipe can be adjusted according to the use condition, unified and centralized discharging treatment is conducted through the inclined conveying pipe, the situation of splashing generated in the construction process is reduced, and dust generated in the drilling process can be reduced through the arranged industrial dust collector.

The application discloses a rock-concrete interface dynamic shearing testing device and a testing method thereof, and belongs to the field of rock mechanics and rock engineering. The device comprises a dynamic shearing loading mechanism, a seepage loading mechanism, and a data acquisition mechanism. The dynamic shearing loading mechanism comprises a power assembly, an incident rod, a transmission rod and a buffer device. The incident rod is movably sleeved with the incident sleeve at one end, and the incident sleeve and the transmission sleeve are respectively abutted with two sides of a sample to clamp the sample. The transmission rod is fixedly sleeved with the transmission sleeve at one end, and the transmission sleeve is provided with a cavity near one end of the sample. The water outlet end of the water injection assembly is connected with the transmission sleeve, water is applied to the end face of the sample near the transmission sleeve, the water inlet end of the water injection assembly is connected with the incident sleeve, and the water passing through the sample is recycled. The device can test the mechanical properties of the rock-concrete interface under the coupling conditions of confining pressure, seepage and dynamic shearing, so that the actual stress state of the interface under a complex environment can be simulated.

The application discloses a kind of based on image recognition's rock breaking operation monitoring method, it is related to rock engineering technical field, specifically including the following operating steps: S1, rock breaking real-time image acquisition, uses high-speed camera in sample free surface direction real-time shooting the destruction process of rock breaking device to several samples, collects real-time image in rock breaking process;S2, to the image handled in real time acquisition;S3, feature extraction is carried out to image;S4, identification model is constructed;S5, intelligent discrimination and early warning.The rock breaking operation monitoring method based on image recognition provided in the application is monitored and intelligently analyzed to rock breaking operation by image recognition technology, compared with the prior art of several sensors monitoring output set in detection area, can effectively improve operation safety and reduce maintenance cost, relative to the case of long time complicated data of prior art, the rock breaking operation monitoring method based on image recognition of the application is more rapid in processing efficiency.

The utility model provides a feeding device for earthwork engineering construction, which belongs to the field of engineering construction and comprises two groups of middle frames, a first rotating roller is bolted on one side of each middle frame, a belt is mounted on the outer side of each first rotating roller in a tensioning manner, and a conveying mechanism is fixedly arranged between the middle frames. By means of the arranged conveying mechanism, in the using process, an arranged auxiliary roller drives a belt to convey objects, when the belt works, the first wheel can be driven, two sets of limiting blocks can fix the first wheel, when the belt conveys materials, the belt can be attached to a second wheel and drive the second wheel to operate, and the two sets of limiting blocks can also fix the second wheel; the risk that materials slide to the side edge of the belt is effectively reduced, operation is efficient, the working efficiency of transportation is greatly improved, and use is convenient.

The invention belongs to the technical field of petroleum and natural gas geology and rock mechanics, and particularly relates to a quantitative evaluation method for crack complexity after compression damage. Compared with an existing method based on statistics and mainly evaluating from single factors (crack length, density, form, trend and the like), the method provided by the invention has the advantages that on the basis of an in-situ compression CT scanning experiment, the crack connectivity index and the crack fractal dimension of the post-compression plunger sample are calculated, and the weight coefficients of the two are respectively obtained by utilizing an entropy weight method; and comprehensively evaluating the crack complexity after pressure damage. According to the method, the fracture connectivity index and the fracture fractal dimension are fully considered, factors are comprehensively considered, the operability is high, and the result credibility is high. The method is not only suitable for exploitation effect evaluation of shale oil and tight oil reservoirs, but also can be applied to other types of oil reservoirs and rock engineering.

The application discloses a kind of based on ultrasonic wave attenuation characteristics pillar load quantitative inversion and safety diagnosis method, belong to rock engineering safety monitoring and nondestructive testing technical field.First, construct the rock sample with different fracture characteristics, carry out loading test under different load and obtain multi-band time domain signal, obtain the attenuation value under different load grade to construct the quantitative relationship model of different frequency band;Statistical pillar fracture characteristic parameters, obtain its attenuation value under each frequency band;Substitute into quantitative relationship model, carry out multi-band data fusion inversion, obtain the current equivalent load of pillar;Calculate safety factor, combined with the stability quantitative evaluation standard constructed, carry out quantitative diagnosis to target pillar stability.The application uses ultrasonic wave attenuation characteristics, improves diagnosis sensitivity and accuracy;Discard single frequency pulse, adopt sweep excitation technology can simultaneously identify the coupling mechanism of load action and fracture characteristics;Overcome the limitation of single factor, realize quantitative judgment.

The present application relates to the technical fields of modeling and adaptive correction of highland frozen rock dynamic response, and discloses a rock dynamic response simulation method and system for highland frozen rock, which is used to solve the deviation problem caused by directly extrapolating normal temperature continuous medium parameters to highland frozen rock engineering, and the method comprises the following steps: step one, constructing a digital rock model with real mesostructure through in-situ monitoring and CT scanning; step two, quantifying the dependence of frozen rock mechanical behavior on temperature and strain rate through systematic tests under multiple temperatures, multiple water contents and combined dynamic and static loads, and establishing a dynamic parameter database; step three, constructing a sequential thermal-mechanical coupling numerical model, dynamically updating the element material properties according to the instantaneous temperature, water content and strain rate state, and realizing high-fidelity simulation; step four, comparing the field monitoring data with the simulation results, starting the parameter optimization process based on the proxy model and inversion algorithm, and updating the verified and effective optimization results to the database to form a self-evolution closed loop.

The invention relates to the technical field of computational mechanics and rock mass engineering, in particular to a DDDA-based numerical simulation method for end anchoring rock mass engineering, which comprises the following steps: constructing a circular unit discontinuous deformation analysis numerical model according to actual engineering conditions; calculating a discontinuous deformation analysis numerical value; analyzing a calculation result of the non-anchoring model, and preliminarily determining an anchoring scheme; calculating a discontinuous deformation analysis numerical value; and judging whether the model has unstable blocks or not, adjusting the anchoring scheme, and circulating the previous steps until the model is stable, thereby completing the anchoring scheme design of rock mass engineering. The numerical simulation method which can accurately simulate interaction of the anchor rod (anchor cable) and the rock mass and integrates anchoring scheme design, stability evaluation and parameter dynamic optimization functions is established, accurate prediction of deformation and failure behaviors of the anchored rock mass and optimization of anchoring design are achieved, and the method has the advantages of being high in simulation precision and practicability.

The rock composite fracture simulation method based on energy level least square near field dynamics is disclosed, and relates to the technical field of rock engineering. The method comprises the following steps: applying a load to a numerical model of a rock to be measured; simulating the numerical model based on least square near field dynamics; determining whether the numerical model is damaged by using a mixed energy failure criterion, which is constructed in advance based on a type I fracture critical energy density and a type II fracture critical energy density; determining whether a current total load step reaches a preset total step number after the damage; if not, keeping the current load unchanged and continuing to apply the load to the numerical model until the current total load step reaches the preset total step number. By combining the real strain energy state of the near field dynamics key and the mixed energy failure criterion, the development process of the tensile, shear and mixed type cracks in the rock is accurately described. The prediction accuracy of the damage mode of the rock mass under the complex stress environment is significantly improved.

The invention relates to the field of rock engineering, and discloses a test device and a test method for representing the anti-dynamic water dispersion performance of a pouring type anchoring agent under multiple working conditions, the test device comprises a capped hole steel pipe, a filter screen groove, a constant flow pump, a water tank, a static mixer, an AB material box and a pressure pump, the capped hole steel pipe is composed of a hole double-layer steel pipe, a threaded pipe cap and a water stop screw, the threaded pipe cap is matched with the hole double-layer steel pipe, the water stop screw is matched with a hole of the hole double-layer steel pipe and used for adjusting the circulation state of the hole, and through the exquisite structural design of the capped hole steel pipe, the hole double-layer steel pipe, the threaded pipe cap and the water stop screw are cooperatively matched, and the circulation state of the hole is flexibly adjusted through the water stop screw; various common actual flowing water working conditions such as no flowing water on the hole wall-flowing water at the hole bottom, flowing water on the hole wall-no flowing water at the hole bottom, flowing water on the hole wall-flowing water at the hole bottom and the like in rock engineering can be accurately reproduced, so that a test environment is highly fit with a real application scene of a pouring type anchoring agent.