228 results about "Rock structure" patented technology

The application provides a method for evaluating stability of a tunnel surrounding rock considering creep characteristics of a structural plane, which includes the following steps: S1, discretizing a tunnel surrounding rock region, and constructing a numerical model of a tunnel-surrounding rock structure; S2, initializing the numerical model; S3, presetting a creep time, and obtaining a normal force of a structural plane node based on an initialized numerical model; S4, based on the normal force, obtaining an unbalanced force of a rock mass region element; and S5, judging the unbalanced force of the rock mass region element, and completing a stability evaluation of the tunnel surrounding rock.

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 discloses a rock pore three-dimensional reconstruction method and system based on an adaptive hierarchical cube algorithm, and a storage medium, relates to the technical field of rock structure measurement, and aims to solve the problems of low extraction execution efficiency, ambiguity and poor reconstruction precision of an existing moving cube algorithm. According to an image segmentation model based on RefineNet, the model adopts three 3 * 3 convolution cascading to replace 7 * 7 convolution, and a coordinate attention mechanism is introduced behind each block of an encoder to improve the segmentation precision and efficiency of a key area; dividing the cube into tetrahedrons by adopting a saddle point-adaptive layered downward subdivision method, solving intersection point coordinates and normal vectors, and constructing a triangular patch index; determining the contour surface shape penetrating through the cube by adopting a cube lookup table, and merging triangles of all tetrahedrons to form a complete contour surface; and creating a new triangular patch by using the vertex of the edge of the hole and the newly generated vertex, and repairing the hole to obtain the accurately reconstructed three-dimensional hole of the rock.

The invention records a roadway surrounding rock fracture morphology measurement method, which comprises the following steps of S1, installing a photogrammetry device in a roadway, and obtaining a continuous digital image of a roadway surrounding rock area to be measured; s2, carrying out image acquisition on the structural surface of the surrounding rock of the roadway to obtain a color original image, and converting the color original image into a grayscale image; s3, dividing the grayscale image into a plurality of local areas, establishing a grayscale histogram of the local areas, and equalizing the grayscale histogram of the local areas to form an enhanced grayscale image; s4, performing adaptive gamma correction on the enhanced grayscale image; s5, smoothing the enhanced grayscale image by using a median filter; s6, using a Sobel operator to carry out crack contour extraction on the enhanced grayscale image; and S7, calculating to obtain the real length, the real width and the crack inclination angle of the tunnel surrounding rock structural surface crack. According to the invention, safe, direct, efficient and accurate acquisition of the surrounding rock fracture image of the coal mine tunnel and rapid identification and extraction of surrounding rock fracture parameters can be realized.

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 discloses a surrounding rock structure deformation prediction system based on multi-source information characterization, relates to the field of geology, solves the problem of poor prediction effect of a surrounding rock structure deformation prediction system, and comprises a geological data module which is used for performing regional geological analysis on target surrounding rock and a plurality of sample monitoring surrounding rock to obtain surrounding rock geological data, the engineering data module is used for carrying out engineering quantity analysis on the target surrounding rock and the plurality of sample monitoring surrounding rocks according to the surrounding rock geological data to obtain surrounding rock engineering data, and the data analysis module is used for obtaining surrounding rock prediction analysis data by analyzing the surrounding rock engineering data and the surrounding rock geological data. And the deformation prediction module is used for establishing a surrounding rock deformation prediction model according to the surrounding rock prediction analysis data and performing deformation prediction on the target surrounding rock by using the surrounding rock deformation prediction model. The accuracy and pertinence of a surrounding rock structure deformation prediction result can be improved.

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 provides a coal rock impact tendency testing and evaluating method based on a dynamic strain gauge, which comprises the following steps: pretreating a coal rock structure standard test piece, performing a uniaxial compression test on the coal rock structure standard test piece, and acquiring a preset index test result of the coal rock structure standard test piece; constructing a model for evaluating the impact tendency of the coal rock structure based on a BP neural network algorithm; and taking the preset index test result as input, and obtaining the impact tendency grade of the to-be-tested coal rock structure test piece by using a BP neural network-based coal rock structure test piece impact tendency evaluation model. The invention further provides a coal rock impact tendency testing and evaluating system based on the dynamic strain gauge. According to the method, the accuracy and reliability of the impact tendency of the coal and rock mass are improved, the precision of the evaluation result is ensured, and the evaluation result of the impact tendency of the coal and rock mass is obtained more conveniently and efficiently.

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.

A computer-implemented method for determining first final values of a first geomechanical parameter of a first well in a first rock structure. The method comprises obtaining first input data from a database. The first input data is generated, at the first well, by at least one first tool module and comprises first well parameters of the first well. The method further comprises calculating first intermediate values of the first geomechanical parameter of the first well using a first porosity-based model and the first input data. First final values of the first geomechanical parameter of the first well are determined from the first intermediate values and the first input data using a first prediction model.

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 present invention provides a test method for studying the shear mechanical properties of rock structural surfaces in combination with photoelastic tests, based on a photoelastic test platform and a direct shear instrument, the direct shear instrument comprising a base unit, a loading unit, a data monitoring and acquisition unit, a control unit and a shear box. The test method comprises the following steps: 1. Adjusting the direct shear instrument and installing the sample; 2. Adjusting the position of the shear box and preparing for the test; 3. Presetting target parameters and selecting a loading mode; 4. Applying a load and collecting test images and data; 5. Returning the direct shear instrument to its original position after the test and saving the data; 6. Image and data analysis. The test method can observe the changes in the stress field and strain field of the sample during the test in real time according to the collected stress optical images, loads, displacements and other test data, combined with preset target parameter values, draw corresponding load-displacement curves, and analyze the influence of different loading conditions on the shear mechanical properties and deformation characteristics of the rock structural surface.

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 relates to the technical field of data processing, in particular to a geotechnical engineering data processing method and system based on cloud computing, and the method comprises the following steps: based on geological survey and field test data of a target area, receiving crack and cavity defect data of a rock stratum structure through a cloud server, and according to the length of a rock stratum crack and the size of a cavity, carrying out the cloud computing; and evaluating the rock stratum anomaly degree to obtain a rock stratum anomaly evaluation result. According to the method, through comprehensive processing of geological survey and field test data, potential geological risks can be rapidly identified, the overall risk of a target area is evaluated in combination with soil stability and rock stratum abnormal data, a scientific basis is provided for geotechnical engineering reinforcement decision, historical data comparative analysis is introduced, and the method has a good application prospect. The method optimizes the selection of the reinforcement method by analyzing the cost of the reinforcement mode, reduces the cost by predicting the material consumption, achieves the high efficiency and refinement of data processing, and improves the safety and economy of geotechnical engineering.

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.