190 results about "Rock structure" patented technology

The invention relates to the technical field of rock mechanics, and discloses a rock three-dimensional reconstruction method and system based on multi-source information fusion, and the method comprises the steps: obtaining and preprocessing data, carrying out the spatial feature learning of a fusion feature vector through a 3D-CNN network, and constructing a three-dimensional voxel model of rock microscopic damage; converting the fused image data into a point cloud model of the underground cavern surrounding rock structure by adopting a three-dimensional reconstruction algorithm based on point cloud, and constructing a digital twin framework of the underground cavern surrounding rock structure based on an implicit surface reconstruction algorithm; feature parameters output by the three-dimensional voxel model and the digital twinning framework are used as input, and the optimal supporting opportunity and supporting parameters are output through an LSTM-CNN fusion model; in the underground engineering construction process, surrounding rock deformation data are collected in real time, and a supporting scheme is adjusted in real time through a depth deterministic strategy gradient algorithm; according to the method, the scientificity and timeliness of support design under complex geological conditions can be improved.

The invention belongs to the technical field of compressed air energy storage facilities, and particularly discloses an underground gas storage chamber and a construction method thereof.The underground gas storage chamber comprises a surrounding rock structure and a gas storage structure, the surrounding rock structure is provided with a storage space, and the gas storage structure is located in the storage space; the structure comprises a primary support, a lining layer, a sealing layer, a sliding layer and a lining layer which are sequentially arranged from outside to inside, a pressure reduction layer is arranged in the lining layer, the lining layer is divided into a first lining layer and a second lining layer by the pressure reduction layer, and the pressure reduction layer is made of a deformable material. A traditional single-layer lining layer is replaced by the double-layer lining layer, the pressure reduction layer is arranged between the double-layer lining layer and the double-layer lining layer, and dynamic loads caused by fluctuation of internal pressure of the gas storage are relieved through telescopic deformation of the pressure reduction layer, so that the risk that the lining layers crack is reduced, the service life of the underground gas storage chamber is prolonged, the advantages of reducing pressure and improving heat transfer are achieved, and the service life of the underground gas storage chamber is prolonged. And requirements of design on geology are reduced, and popularization and application are facilitated.

The invention relates to the technical field of tunnel surrounding rock structure deformation measurement, and provides a tunnel surrounding rock structure deformation measurement system based on machine vision, a visual recording module performs multi-angle image recording on the position of a tunnel surrounding rock structure, and a data preprocessing module performs gray processing on the image transmitted by the visual recording module; the structure deformation analysis module obtains tunnel surrounding rock structure images under the safe condition, and compares and measures the characteristic value difference value of the two images according to the images transmitted by the data preprocessing module. The cross validation module verifies the analysis result of the multi-angle recorded image in the structural deformation analysis module, the early warning module performs early warning according to the verification result of the cross validation module, and the standby measurement module monitors the operation state of an industrial camera in the visual recording module in real time. When the industrial camera in the visual recording module cannot work, access is carried out; according to the invention, the requirements of real-time monitoring and accurate early warning of surrounding rock deformation in the tunnel operation process are met.

The invention provides a bedding structure rock finite element model reconstruction method based on a rock core digital image, and belongs to the technical field of digital rock cores, and the method comprises the following steps: S1, obtaining a gray level image of a rock sample; s2, calculating a transverse mean value of the analysis area to obtain a longitudinal gray level distribution curve; s3, applying moving average filtering and smooth filtering to obtain a smooth gray curve; s4, first-order difference is carried out on the smooth gray level curve, the position with the absolute difference value larger than a threshold value is taken as an initial stripe boundary candidate, and starting and stopping pixels, the width and the average gray level of each stripe are determined; s5, mapping each clustering label interval into a physical interval based on FEM grid partition; and S6, constructing a sample finite element model, and generating a reconstructed finite element model with real partition information. According to the method, the macrostructure features of the rock can be efficiently recognized and extracted by directly utilizing the pictures and combining gray profile analysis, and efficient and low-cost reconstruction of the finite element model of the bedding structure rock is achieved.

The invention discloses a sampling device and method for detecting the oil content of oil sand ore based on hyperspectrum, and relates to the technical field of oil sand ore sampling. Comprising a mounting base, a drilling barrel and a drill bit, the mounting base, the drilling barrel and the drill bit are sequentially in threaded connection in the direction from top to bottom, the mounting base is rotationally connected with a connecting piece located in the drilling barrel, and the lower side of the connecting piece is in threaded connection with a middle barrel; a guide assembly for reducing the moving resistance of the oil sand sample is arranged on the connecting piece; the guide assembly comprises two inner half cylinders which are symmetrically distributed and a sample containing cylinder. An oil sand sample entering the space between the two inner half cylinders is gradually wrapped by the sample containing cylinder, and the oil sand sample is isolated from the inner half cylinders, so that the oil sand sample does not make direct contact with the inner half cylinders, friction resistance borne by the oil sand sample in the process of moving into the inner half cylinders is reduced, interference to the porosity of the oil sand sample and the rock structure is reduced, and the oil sand sample detection accuracy is improved. And the detection error of the oil content is reduced.

The present disclosure provides a method for evaluating a geological storage amount of carbon dioxide (CO2) in a fractured-vuggy carbonate reservoir, including: performing image identification on a three-dimensional scanned image of a rock sample to obtain identified rock information; inputting the identified rock information to a computational fluid dynamics-based numerical simulator for constructing a fractured-vuggy rock structure model, and obtaining geometric topological information of the rock sample based on the fractured-vuggy rock structure model; inputting relevant parameters of the rock sample and the geometric topological information to a multi-scale multi-phase flow numerical model for numerical simulation of multi-phase flow migration of CO2 in models of different scales and obtaining a multi-scale numerical simulation result; and calculating a multi-scale CO2 storage efficiency based on the multi-scale numerical simulation result. The present disclosure may effectively evaluate and predict the storage capability of CO2 in fractured-vuggy carbonate rock.

The invention discloses a Neper-DEM-based apparent crystal rock modeling and calculation method with a bedding structure, relates to the field of numerical calculation of a tunnel engineering technology, and solves the problem that a simulation and calculation method for apparent crystal rocks with transverse isotropy such as gneiss and granite gneiss is lacked in the prior art. The method comprises the following steps: constructing a polycrystal structure with crystal characteristics in Neper, and generating a geometric parameter text of crystal grains from the polycrystal structure; constructing a discrete element rock sample model in the DEM; performing a numerical simulation test on the discrete element rock sample model to obtain a stress-strain curve and a sample failure mode, wherein the numerical simulation is realized by adopting a Brazilian splitting test and a triaxial test; according to a numerical simulation result, discrete element sample calculation parameters are calibrated, and the effectiveness of the modeling and calculation method of the discrete element rock sample model is verified; according to the modeling method, construction and assignment of the crystal structure and the bedding structure are achieved at the same time, so that the rock structure is closer to a real rock structure.

The invention relates to a nanoscale grouting method for illite-smectite mixed layer surrounding rock, which is characterized by comprising the following steps of: S1, combined detection of a borehole television and a ground penetrating radar or a geological radar: carrying out rock mass structure detection in a manner of combining the borehole television and the ground penetrating radar or the geological radar, and obtaining a deformation rule of a roadway and surrounding rock in an area; s2, arranging grouting pipes and an exhaust pipe: arranging two long and short grouting pipes and one exhaust pipe in the grouting hole according to the deformation rule of the roadway and the surrounding rock in combination with numerical simulation of rock mass mechanics and the result of the numerical simulation; s3, grouting is conducted, specifically, grouting is conducted in a deep and shallow hole matching grouting mode; s4, secondary splitting grouting reinforcement is conducted, specifically, the mine illite-smectite mixed layer surrounding rock is reinforced through a secondary splitting grouting technology, the unfilled part in the primary grouting process is made up, and it is ensured that all gaps are filled with grout; and the illite smectite mixed layer surrounding rock can be grouted well.

The invention discloses a roadway roof damage time prediction method and system, and belongs to the technical field of mine rock mechanics and safety engineering. Comprising the following steps: recognizing a roof rock stratum structure and lithology of each layer through drilling peeping, and drilling a representative rock sample; determining the crack initiation strength and peak strength of the rock sample through a uniaxial compression test; selecting a plurality of stress levels between the axial strain and the acoustic emission signal to carry out a creep test, synchronously monitoring the axial strain and the acoustic emission signal, and determining an accelerated creep starting moment as the damage time under the stress according to the abrupt change characteristics of the axial strain and the acoustic emission signal; establishing a stress-failure time relation model of each lithology; finally, selecting a corresponding model to predict the damage time of rocks at different layers of the roof according to the actual rock stratum structure and ground stress state of the roadway; according to the method, accurate and reliable time prediction of the progressive damage process of the roadway roof is realized.

The invention discloses a rock quality index calculation method, system and device and a medium, and the method comprises the steps: determining a three-dimensional point cloud in response to a rock mass quality index calculation request; determining three-dimensional point cloud reconstruction data based on the distance between the three-dimensional point cloud and the fitting plane, and generating a three-dimensional point cloud image based on the three-dimensional point cloud reconstruction data; segmenting a surrounding rock structural surface of the three-dimensional point cloud picture; constructing a first roadway surrounding rock three-dimensional body which does not contain a surrounding rock structural surface; determining a second area corresponding to the surrounding rock structural plane in the three-dimensional point cloud reconstruction data according to the first area of the surrounding rock structural plane in the three-dimensional point cloud picture, and fitting the three-dimensional point cloud reconstruction data of the second area to form a structural plane equation; segmenting the first roadway surrounding rock three-dimensional body for the first time according to a structural plane equation to obtain a second roadway surrounding rock three-dimensional body containing a surrounding rock structural plane; the second roadway surrounding rock three-dimensional body is subjected to second segmentation, the rock mass quality index is calculated according to the second segmentation result, and high efficiency and lossless measurement of the rock mass quality index can be achieved.

The invention discloses a full-space active and passive reinforced supporting method for a deep roadway, and relates to the technical field of deep roadway supporting. The method comprises the following steps: S1, obtaining a roadway surrounding rock structure, ground stress and surrounding rock physical and mechanical parameters; s2, determining the ranges of a broken area, a plastic area and an elastic area of the surrounding rock of the deep roadway; s3, variable-diameter pressure relief drill holes are constructed to reduce the surrounding rock stress; s4, an anchor net is supported, and concrete is sprayed to block the surface of the surrounding rock; s5, grouting reinforcement is conducted, and anchor rod cables are installed; s6, a full-space concrete filled steel tube support is erected; and S7, a roadway bottom plate is poured, and concrete spraying is conducted on the surface of the surrounding rock so that the support can be embedded. According to the surrounding rock control method, active bearing of the roadway surrounding rock and passive supporting of the full-space support can be effectively coordinated, the cooperative bearing capacity of the deep roadway can be improved, and safety and stability of the deep roadway are guaranteed.

The invention provides a shear creep test device and test method capable of controlling the water-containing state of a rock structural plane, the device comprises a direct shear apparatus, a soaking device, an inflation device and a shear box, the direct shear apparatus comprises a loading frame, a loading device and a sliding device; the shear box comprises an upper shear box and a lower shear box, the upper shear box is provided with a first notch, and the lower shear box is provided with a second notch; the structural plane-containing rock sample comprises a hanging wall rock, a footwall rock and a structural plane, the hanging wall rock is placed in the first notch, the footwall rock is placed in the second notch, the lower shear box is placed on the sliding device, the hanging wall rock and the upper shear box are placed on the footwall rock, and the structural planes of the hanging wall rock and the footwall rock are aligned and contacted; the soaking device is arranged on the lower shear box, and the inflating device is connected to the upper shear box; and the loading device applies a normal load to the upper shear box and applies a transverse load to the lower shear box. The device and the method can be applied to research on shear mechanical characteristics and shear creep characteristics of the rock structural surface in different water-containing states.

The invention discloses a quick tunneling surrounding rock drilling geophysical prospecting device and method for a weakly cemented rock stratum coal mine tunnel. The device comprises a tunneling machine, a drilling device, a while-drilling transient electromagnetic device, a while-drilling impact seismic source device, an equipment cable and a field host. The while-drilling transient electromagnetic device, the while-drilling impact seismic source device and the drill bit are sequentially connected, the while-drilling transient electromagnetic device is used for collecting data of electromagnetic detection, and the while-drilling impact seismic source device is used for exciting seismic waves; the on-site host is connected with the while-drilling transient electromagnetic device, the while-drilling impact seismic source device and the drill bit. According to the invention, drilling, seismic wave detection and transient electromagnetic detection are organically fused, real-time identification and dynamic analysis of a surrounding rock structure are realized, seamless connection of real-time exploration and construction, synchronous exploration and tunneling and integration of fused drilling geophysical prospecting data are realized; the method is especially suitable for geological detection requirements of weak cemented surrounding rock strata in coal mine tunnel excavation, and can effectively improve detection precision and operation efficiency under complex and weak surrounding rock conditions.

The invention relates to the technical field of underground roadway reinforcement, in particular to an underground roadway surrounding rock reinforcement grouting device and method. A reinforcing and grouting movement adjusting structure is slidably mounted on the reinforcing base; and a crack drilling reinforcement grouting structure for reinforcing and grouting surrounding rock of the roadway under the mine is assembled on the reinforcement grouting movement adjusting structure. The drilling and grouting integrated device has the advantages that efficient grouting is achieved, drilling and grouting are integrated, a drilling bidirectional motor drives a drilling rod to rotate for drilling operation, concrete grout is discharged into a surrounding rock crack hole from the outside of the drilling rod, efficient and continuous drilling and grouting operation is achieved, the construction efficiency is improved, reinforcing grouting is automatically triggered, and once cracks are monitored, the drilling and grouting integrated device can be used for drilling and grouting. According to the method, the surrounding rock structure can be repaired before being seriously damaged, the dangerous situation of roadway collapse caused by further expansion of cracks is effectively prevented, the safety of the roadway under the mine is greatly improved, and the life safety of underground operating personnel and the continuous proceeding of normal production activities are guaranteed.

Described herein are systems and techniques for improving the accuracy of computer models that determine properties of subterranean rock formations. Such systems and methods may perform multiple sets of calculations using data collected by different types of sensing devices that may be deployed in a wellbore. For example, a first set of inversions may be made on data collected by an electromagnetic (EM) sensing device and a second set of inversions may be made using EM data and data collected by a gamma ray (GR) sensing device. Such methods may be useful when making determinations regarding subterranean features that include laminated structures. For example, when rock structures include layers of sand and layers of shale.

The invention discloses a visual seepage test device and method for shear fracture of a rock structural surface under true triaxial. The visual seepage test device comprises a fixed base, a lower shear box, an upper shear box, a seepage water inlet pipe, a seepage water outlet pipe, a seepage water inlet shear head and a seepage water outlet shear head, the fixed base is connected with a normal loading block of a true triaxial testing machine through pin nails, the lower shear box is fixed on the fixed base, the upper shear box and the lower shear box are oppositely arranged, and the seepage water inlet shear head and the seepage water outlet shear head are respectively embedded into the lower shear box and the upper shear box to form a water injection cavity I and a water injection cavity II; after the lower shearing box and the upper shearing box are closed, a closed sample cavity for clamping a rock sample and a transparent block is formed, and meanwhile, the water injection cavity I and the water injection cavity II form a seepage cavity. According to the device and the method, the visual shear simulation of the rock mass structural surface under the multi-field coupling environment of true three-dimensional stress-high osmotic pressure-chemical corrosion and the like is realized.

The invention relates to the technical field of tunnel construction, in particular to a dust falling device and method based on machine vision, and the dust falling device comprises a surrounding rock structural surface intelligent recognition device, an anchoring assembly, a sliding rail assembly, an atomization assembly, a vision device, a dust concentration instrument, a four-in-one gas monitor, a phase Doppler particle analyzer and a control device. The anchoring assembly is detachably installed on the top wall of a tunnel, the sliding rail assembly is connected to the anchoring assembly, the sliding rail assembly is arranged in the axial direction of the tunnel, the atomization assembly is connected to the sliding rail assembly, the atomization assembly is connected to the sliding rail assembly, and the atomization assembly is connected to a tunnel water pipe. The intelligent recognition equipment for the surrounding rock structural plane is mounted at a position close to a tunnel face in a tunnel. The technical problems that in the prior art, tunnel blasting and dust falling equipment always operates independently, and effective coordination and intelligent control are lacked are solved.

The invention provides a rapid evaluation method for shear strength of a rock structural plane under normal disturbance, and belongs to the technical field of geotechnical engineering and rock mechanics, the method comprises the following steps: S1, sample preparation and initial parameter acquisition; s2, normal disturbance direct shear test; s3, fitting test data and establishing an empirical model; and S4, rapidly evaluating the shear strength. According to the method, by introducing a normal disturbance stress parameter, an empirical calculation formula capable of rapidly predicting the shear strength after disturbance is established, and key parameters are provided for engineering design and stability analysis.

The invention discloses a high-capping-index and low-permeability single coal seam construction, pressing and explosion alternate permeability increasing method, which comprises the following steps of: performing pressure relief and permeability increasing on a coal seam through large-drill-diameter extraction, hole formation through a seam penetrating machine, and changing rock stratum structures of a coal seam top and a bottom plate through hydraulic fracturing so as to increase a gas diffusion channel, during large-drill-diameter extraction, drill holes are controlled to incline upwards by 20 m and incline downwards by 15 m respectively, the trend of the left contour line and the trend of the right contour line are controlled to be 15 m respectively, one group of drill holes are constructed at the interval of 5 m, and the drill hole construction diameter is phi 133 mm; hydraulic fracturing is carried out through the large-drill-diameter layer-penetrating drill holes to respectively fracture a top plate and a bottom plate of the coal seam, damage the rock stratum structure of the top plate and the bottom plate of the coal seam, change stress distribution of the coal seam and increase gas diffusion channels; after the outburst prevention measure layer-crossing construction in the large-drill-diameter area is carried out, fixed-point hole forming is carried out on a coal seeing section according to the actual coal seeing condition of the layer-crossing drilling holes at intervals of one group of construction layer-crossing hole forming drilling holes, and hole forming phi is 500 mm. According to the method, the gas extraction effect of the low-permeability coal seam can be greatly improved, and the probability of coal and gas outburst during tunneling is reduced.

The invention provides a tunnel surrounding rock section monitoring point determination method, system and device and a storage medium, and the method comprises the steps: obtaining tunnel design parameters, and constructing a tunnel surrounding rock structure model according to the design parameters; combining a plurality of excavation methods into a plurality of excavation schemes, and performing simulated excavation on the tunnel surrounding rock structure model by using each excavation scheme to obtain corresponding deformation of surrounding rock sections around the tunnel; according to the deformation amount of the surrounding rock section, deformation and failure characteristics of rock mass around the tunnel are estimated, and a monitoring point is determined; in the actual excavation process, a monitoring device is arranged at a monitoring point, and the surrounding rock section around the tunnel is monitored. According to the invention, the problems that the measurement error is high and the stability control and the monitoring early warning of the small-clear-distance overlapping tunnel are insufficient due to the fact that the arrangement position of the monitoring device can only be set according to the experience of a worker in the construction of the extremely-small-clear-distance overlapping tunnel in the prior art are solved.

The invention belongs to the technical field of rock physical simulation, and particularly relates to a rock structure surface roughness generation method based on power spectral density. A rock structure surface roughness generation method based on power spectral density comprises the following steps: establishing an initialized Fourier coefficient storage array, generating a Fourier matrix through basic calculation parameters, and generating surface data X by using inverse Fourier transform; sampling the obtained surface data, and calculating a joint roughness value JRC through different roughness parameters; establishing a target joint roughness value optimization function, and iteratively obtaining an optimal parameter solution under various characteristic parameter standards through global optimization and local optimization; and for the surface data obtained according to different target joint roughness, 3D printing is used for achieving generation of the surface with the specific roughness. According to the method, repeatable corresponding joint roughness surface generation under various roughness parameter evaluation standards of the rock surface is realized, and the natural rock joint surface can be simulated more accurately.

The invention discloses a mine roof dynamic exposure time prediction method considering rock mass structural creep, and belongs to the technical field of mining safety, and the method specifically comprises the following steps: S1, carrying out rock mass structure measurement on a roof rock mass, and obtaining a rock mass integrity coefficient of the roof rock mass; s2, testing rock samples of roof rock masses with different burial depths are drilled on site, an indoor creep-fatigue interaction mechanical test is carried out on the testing rock samples, stress disturbance is applied in the indoor creep mechanical test, time corresponding to a creep stable stage and a creep unstable stage of the testing rock samples is determined, and a dynamic exposure time interval of the mine roof is preliminarily obtained; and S3, revising the initial mine roof dynamic exposure time interval according to the rock mass integrity coefficient to obtain predicted mine roof dynamic exposure time. The prediction precision is high, the prediction is shortened from the month level to the day level, and the mine roof management work can be conveniently guided.

The invention discloses a distributed rock stress real-time inversion method and system, and the method comprises the steps: discretizing a target region rock structure through a discontinuous structure stress field model, collecting parameters, and constructing a geological-physical constraint inversion frame; initial stress tensor distribution is obtained by applying a seismic source mechanism solution and a stress tensor linear inversion algorithm, and optimization is carried out in combination with a constraint framework; distributed rock stress parameters are introduced to establish a mapping relation to invert initial distribution, and real-time updating is achieved through continuous data collection and repeated processing. The system comprises a plurality of association units which respectively execute the functions of discrete acquisition, framework construction, inversion optimization and the like. According to the method and the system, the geological-physical constraint quantification accuracy is improved, the problem that a real-time updating mechanism is incomplete is solved, the accuracy, comprehensiveness and efficiency of inversion are improved, and reliable technical support is provided for geological engineering, disaster early warning and the like.

The invention discloses a high-temperature and high-pressure testing device for a rock test, and particularly relates to the technical field of rock testing, the high-temperature and high-pressure testing device comprises a shell, the inner surface of the shell is fixedly connected with a first partition plate and a second partition plate, and the upper end of the second partition plate is provided with a bagging assembly and a pushing steering assembly. According to the high-temperature and high-pressure testing device for the rock test, the bagging assembly is arranged, so that a rubber film bag can be tightly attached to the outer surface and the left end face of a cylindrical rock, and in a high-temperature and high-pressure test, the surface integrity and the structural stability of the cylindrical rock during the test can be maintained; the outer cylindrical surface seal can prevent scratch wear caused by friction and collision with test device components, the rock mechanical property and test result accuracy are guaranteed, the sealed end surface can prevent surface moisture evaporation and sun crack of porous or easily-weathered rocks due to environmental change, the rock structure is maintained to be stable, and the consistency of rock performance in the test process is guaranteed.

The present invention discloses a direct current electrical method for testing and evaluating the stability of underground tunnel support, including: before the tunnel is developed and supported, a plurality of measuring lines are evenly arranged around the tunnel to test the resistivity information of the original structure of the surrounding rock before support; drilling is performed on the area with abnormal resistivity of the surrounding rock to determine and identify its geological information such as cracks and water content; with the resistivity information of the original structure of the surrounding rock as the background, after the tunnel is supported, the resistivity information of the surrounding rock is regularly tested according to a preset cycle, and the resistivity gradient and resistivity change rate of the surrounding rock are calculated; based on the resistivity test and drilling results, the stability of the tunnel structure is evaluated. The technical solution of the present invention tests the resistivity of the tunnel by direct current electrical method to obtain the surrounding rock structure information, can identify the hidden geological defects of the tunnel surrounding rock, and then evaluate the stability of the surrounding rock, and has a good prediction ability for the possible tunnel disaster incubation process, thereby improving the accuracy of the tunnel stability evaluation.

The application discloses a white granite type high-purity quartz purity prediction method and application thereof, and belongs to the technical field of rock purity prediction. The prediction method encodes and assigns one or more prediction parameters, such as main mica types, rock structures, rock structures, feldspar types, quartz types, solid inclusions, liquid inclusions, solid inclusion quantity, aluminum impurity element content grading, titanium and lithium element content grading, calcium and phosphorus element content grading, potassium and sodium element content grading and grain factor grading, and then predicts the quartz purity in the ore based on a random forest classifier prediction model or a support vector machine prediction model. The comparison between the actual measurement and the prediction result proves that the prediction method has accurate and reliable prediction results, realizes the replacement of manual detection by artificial intelligence prediction, greatly reduces the manpower and material resources, and provides an efficient and accurate prediction method for quartz purity prediction.

The present disclosure discloses a stress flow warning method and device, an electronic device and a storage medium for rock burst, and relates to the field of data processing technology. Compared with related technologies, the embodiments of the present application calculate stress flow, combine the situation when similar models are destroyed, and comprehensively analyze and derive a preset dynamic yield surface model of stress flow affecting coal rock mass. By simulating different coal rock structures, an experiment between stress flow and coal rock mass instability is obtained, and a rock burst warning threshold based on stress flow is set. Different warning thresholds exist for different structural conditions, thereby improving the prediction accuracy of rock burst.

The present invention relates to a hydrodynamic analysis method for a baffle-rockfill breakwater, comprising the following steps: developing a new structural type of a baffle-rockfill breakwater, that is, dumping rockfill on the back-wave side of the baffle, and fixing the two sides of the rockfill structure with fence plates; for the new baffle-rockfill breakwater structure, establishing a hydrodynamic analysis mathematical model of the baffle-rockfill breakwater based on potential flow theory, porous medium theory, and separation of variables method; using a matching characteristic function method, establishing a linear equation group based on the boundary conditions of fluid motion; and determining the undetermined coefficients in the velocity potential by solving the equation group. The baffle-rockfill breakwater proposed in the present invention is an environmentally friendly structure with the advantages of low transmission, small wave force, and prevention of scouring of the bottom of the dike. The theoretical analytical hydrodynamic analysis method of the baffle-rockfill breakwater provided by the present invention has an efficient calculation speed and can provide a scientific basis for the engineering design and optimization of the baffle-rockfill breakwater.

The invention discloses a preparation method and device of a salt rock-mudstone interface model sample. The preparation method comprises the following steps: pre-pressing and splicing a salt rock block body and a mudstone block body to form a sample assembly; placing the spliced sample assembly with the pre-compressive stress in a preset high-humidity air environment and / or a high-humidity-low-humidity circulating air environment, so that the surface of the salt rock block deliquesces to generate a saturated salt solution, and the saturated salt solution is filled in an interface gap between the salt rock block and the mudstone block; activating a gap self-healing mechanism of a salt rock block on one side of the interface to realize interface stitching, and preparing a salt rock-mudstone interface model sample matched with an actual rock structure; according to the application, the salt rock-mudstone interface can be simulated more truly, so that more accurate mechanical and permeability characteristic experimental data of the salt rock-mudstone interface can be obtained, and the evaluation precision of the long-term operation reliability of the underground layered salt rock-salt cavern energy storage system is improved.

The invention discloses a subsea tunnel surrounding rock full life cycle test method based on a supergravity geotechnical centrifuge technology, which comprises the following steps: firstly, constructing a model box, carrying out scale simulation on a subsea tunnel and a surrounding rock structure thereof, then putting the model box into a vacuum box for saturation treatment, finally taking the model box out of the vacuum box, putting the model box into a supergravity geotechnical centrifuge, and testing the whole life cycle of the subsea tunnel surrounding rock. And the super-gravity geotechnical centrifuge is started to rotate, and the strain sensor collects the dependent variable of the rock stratum near the tunnel reduced-scale pipeline in real time, so that the nonlinear elastic deformation of the rock stratum in the full life cycle in the running process of the train track simulation mechanism is observed. The model box is constructed to simulate the subsea tunnel and the surrounding rock structure thereof, test analysis is performed based on the supergravity geotechnical centrifugal technology, the evolution process of damage of the subsea tunnel and the surrounding rock structure thereof is remarkably accelerated, the experimental period is shortened, and the change condition of the whole life cycle is rapidly tested and determined.