294results about "Geological measurements" patented technology

This invention discloses a method for indicating the degree of pyrite development in carbonate reservoirs, belonging to the field of geological exploration technology. Its key features include the following steps: a) selecting sensitive parameters to distinguish pyrite development based on the well logging response characteristics of pyrite-developed strata; b) establishing trend lines for the variation of sensitive parameters in formations with no or low pyrite content using these sensitive parameters; c) constructing trend lines for the variation of sensitive parameters with pyrite content based on strata data from key wells with different pyrite contents; d) identifying pyrite-enriched strata in the wells to be identified based on the intersection indications of the sensitive parameters; e) evaluating the degree of pyrite development in the pyrite-enriched strata by assessing the degree of difference in the intersection of sensitive parameters. This invention achieves the identification of pyrite-enriched strata through resistivity and sonic transit time intersection, enabling rapid and accurate identification of the degree of pyrite development in carbonate reservoirs.

A sensor device (100) and a method (800) for assessing the effect of air flow on sensor data are provided. The sensor device receives sensor data S d a thermal sensor (130) for detecting the airflow (170) and audio data A generated from the airflow (170) d The system includes a microphone (150) for sensing the thermal sensor and a processor (200) coupled to the thermal sensor and the microphone, the processor obtaining sensed sensor data and sensed audio data, and determining at least one characteristic P of the air flow based on the obtained audio data. i and estimating at least one correlation criterion C between the sensor data and the audio data. c At least one characteristic P of the air flow to the sensor data based on i Impact level L f The method is configured to estimate

The application discloses a kind of evaporator inner plug testing equipment of accurate positioning, it is related to evaporator performance detection technical field, including test table, advancing support unit, test mark unit and sensing unit, wherein test table is used for signal control and reception, advancing support unit is used for the support travel of evaporator pipeline, test mark unit is used for testing whether the internal plug point of evaporator appears, sensing unit is used for detecting the viscosity of plug point plug, in the advancing process of advancing support unit in evaporator, whether the internal plug of evaporator appears is detected by test mark unit, while the plug point is marked, it is convenient for subsequent accurate positioning plug point, the viscosity of plug point plug that appears is detected by sensing unit, it is convenient for subsequent corresponding cleaning means, improve maintenance efficiency.

A method for preventing the burning of a slag-probing rod used in high-temperature metallurgical smelting equipment and the slag-probing rod, in which a high-temperature-resistant isolation layer is compounded on the surface of the base material of the slag-probing rod, and a material-modified layer is further coated on the surface of the high-temperature-resistant isolation layer to further enhance the heat-insulating effect of the isolation layer and prevent the burning of the slag-probing rod in the high-temperature metallurgical smelting liquid; the high-temperature-resistant isolation layer is a ceramic-based heat-insulating material layer, and a modified layer composed of rare earth material is coated on the outer surface of the ceramic-based heat-insulating material layer, the material properties of the outer surface of the ceramic-based heat-insulating material layer are modified by the rare earth material, a high-temperature-resistant isolation layer with better heat-insulating effect is formed, and when the slag-probing rod is inserted into the smelting metal liquid in the high-temperature metallurgical smelting equipment, the high-temperature-resistant isolation layer protects the base rod of the slag-probing rod from high temperature. The present application forms a heat-insulating isolation layer on the outer surface of the ceramic-based heat-insulating material layer by modifying with rare earth material, which can effectively reduce the temperature of the middle part of the slag-probing rod and prevent the burning of the slag-probing rod.

This utility model discloses a high-stability welding positioning mechanism and welding workstation for automotive sheet metal parts. It includes a first positioning frame, a second positioning frame, a welding positioning frame, a first positioning component, a second positioning component, a first pressing component, and a second pressing component. The first positioning component is used to press and fix the middle part of the first sheet metal part; the second positioning component is used to press and fix the second sheet metal part; the welding positioning frame supports the first and second welding parts; the first pressing component presses and fixes the first and second welding parts onto the welding positioning frame while simultaneously fixing the first sheet metal part; and the second pressing component presses and fixes the second sheet metal part to the bottom of the first sheet metal part while simultaneously pressing and fixing the second sheet metal part onto a second positioning table. This positioning mechanism achieves multiple fixations for the first and second sheet metal parts, preventing wobbling during welding and improving welding quality.

The application discloses a lithology prediction method and device in a target area, equipment, a medium and a product. The method comprises the following steps: acquiring seismic data in a target area, and seismic data and well logging data of known wells in a research area; training an initial well velocity curve prediction model according to the seismic data in the research area and the well logging data of the known wells, to obtain a target well velocity curve prediction model; determining a plurality of virtual well simulation velocity curves according to the seismic data in the target area; inputting the virtual well simulation velocity curves into the target well velocity curve prediction model, to obtain actual velocity curves of the virtual wells; and determining a lithology prediction result in the target area according to the actual velocity curves of the virtual wells and the seismic data in the target area based on an inversion algorithm. The technical scheme can improve the lithology prediction accuracy.

The application discloses a kind of based on sequence stratigraphy and seismic sedimentology's braided river channel reservoir fine characterization method, comprising the following steps: obtaining target area core, well logging and high-resolution three-dimensional seismic data;By analyzing the sedimentology mark and logging facies mark in the target area, to determine the sedimentary facies type and sedimentary microfacies division;Using lithology and well logging curve, using the theory of sedimentology, high-resolution sequence stratigraphy identifies sequence interface type and feature, and carries out high-resolution sequence stratigraphic sequence division;Division reservoir architecture interface;According to the internal structure of sedimentary system, sedimentary facies distribution, focus on high-frequency sequence and sedimentary body scale, generate the braided river channel reservoir fine characterization result of target area architecture unit.The present application effectively solves the deficiencies of prior art in reservoir fine description, boundary identification and parameter inversion, improves the efficiency and success rate of oil and gas reservoir development.

This application discloses an automatic optical axis number identification device and method for a light curtain sensor. The device includes a main controller; a detection signal line connected to the detection port of the main controller and connected to a first reference potential through a first resistor; multiple cascaded axis control modules; each axis control module includes a shift unit, the clock terminal of each shift unit is connected to the main controller, the signal input terminal of the first-stage axis control module is connected to the main controller, the signal output terminal of the preceding-stage axis control module is connected to the signal input terminal of the following-stage axis control module; only the signal output terminal of the last-stage axis control module is connected to the detection signal line through an identification element. The main controller sends a valid level signal to the first-stage axis control module and outputs shift clock pulses to propagate the signal step by step. The number of optical axes is determined based on the number of clock pulses when the level of the detection port flips. This application achieves automatic optical axis number identification through cascaded shifting and a final-stage feedback mechanism, eliminating the need for manual configuration and effectively improving production efficiency and product reliability.

This invention belongs to the technical field of body position detection devices and discloses a body position detection alarm device for patients under general anesthesia. It includes a support frame with a cloth pad on it, and a body position detection pad fixedly connected to the cloth pad. It also includes a self-detecting tensioning component located at the bottom of the support frame to improve the detection accuracy of the body position detection pad. The self-detecting tensioning component includes a motor fixedly connected to the bottom of the support frame. This invention uses a motor to drive a screw to rotate, causing a mouth-shaped sleeve and a roller to move. This allows for a rolling pressure self-check of the body position detection pad before use, promptly detecting damage or abnormal sensitivity and preventing detection failure. Simultaneously, as the mouth-shaped sleeve moves, the linked casters press down on the inclined plate, and the anti-dislodgement positioning component synchronously tensions the cloth pad and the body position detection pad, completely eliminating wrinkles and gaps, preventing displacement of the body position detection pad due to changes in body position, and improving the accuracy of body position detection for patients under general anesthesia.

The present application provides a kind of shale gas dessert evaluation method based on methane carbon isotope in tank top gas, the shale gas dessert evaluation method includes the following steps: (1) obtain the tank top gas sample of logging, measure the methane carbon isotope value in tank top gas sample by time period;(2) the data sequence of different time periods of methane carbon isotope value obtained in step (1) is curve fitting;(3) the curve obtained in step (2) is sequentially integrated and differentiated, form the model algorithm of the characteristics of shale reservoir storage and desorption gas volume;(4) according to the model algorithm obtained in step (3), the quality of shale gas reservoir is classified, and the dessert interval is divided out.The evaluation method provided by the present application solves the technical problem of shale gas reservoir site dessert identification under the condition of no geological coring and no geophysical logging, improves the shale gas dessert drilling rate and single well development efficiency, and clarifies the related technical principles and technical routes, reduces the exploration cost, and improves the customer acceptance.

The application discloses a lithology prediction method based on a segmented weighted Spearman algorithm and gradient integrated learning, and comprises the following steps: S1, collecting well logging curve data and performing pretreatment; S2, screening the well logging curve based on a segmented weighted Spearman algorithm; S3, constructing a lithology prediction model; S4, evaluating and optimizing the lithology prediction model; and S5, predicting the lithology of a whole well section.The application has the beneficial effect that key well logging curve features are screened through the segmented weighted Spearman algorithm, and three types of gradient algorithms are fused to construct a lithology prediction model, so that the mapping relationship between the well logging curve and the lithology is effectively depicted, the lithology recognition precision and the model generalization capability are significantly improved, and reliable support is provided for fine evaluation of the reservoir.

The application provides a method for grading the quality of altered rock mass of underground tunnels, and relates to the technical field of rock mass grading. The method comprises the following steps: obtaining the Q value of the rock mass through the Q system grading method; defining the first index corresponding to the alteration degree, the second index corresponding to the position relationship between the altered rock mass and the tunnel, and the third index corresponding to the groundwater outcrop condition; calculating the product of the first index, the second index, the third index and the Q value to obtain the corrected Q value; and grading the quality of the altered rock mass according to the corrected Q value. In this way, the alteration degree of the altered rock mass, the position relationship between the altered rock mass and the tunnel, and the influence of the groundwater on the altered rock mass are all taken into account, so that the grading of the altered rock mass according to the corrected Q value is more accurate, and the problem of deviation in the grading of the altered rock mass according to the existing Q system grading method is solved. The application is suitable for grading the quality of altered rock mass of underground tunnels.

The utility model relates to gearbox housing production technical field, and disclose a kind of hole position detection device for gearbox housing production, including conveying unit, it is characterized by: the surface of conveying unit is provided with detection unit.This kind of hole position detection device for gearbox housing production, without manual handling and alignment, from conveying to detection can be completed automatically, realize continuous operation, efficiency is significantly improved, adapt to batch production demand, when detecting different models shell, mould replacement operation is simple, without complex disassembly, strong adaptability, accurate in detection process Hole alignment, reduce misjudgment, conveying link has buffering protection, reduce shell knock damage risk, when detecting, component damage can also be avoided, overall can improve detection efficiency, reduce operation complexity, protect shell and component, reliable in use.

This invention discloses a method and system for predicting reservoir types, comprising: obtaining a cross-interpretation chart of sandstone and mudstone transverse and longitudinal wave impedances based on the lithological distribution information, P-wave impedance curves, and S-wave impedance curves of the target layer in the target well; constructing new elastic impedance curves for distinguishing sandstone and mudstone based on P-wave and S-wave characteristics using principal component analysis based on the sandstone and mudstone transverse and longitudinal wave impedances in the cross-interpretation chart; constructing a new three-dimensional elastic impedance data volume based on the new elastic impedance curves and the three-dimensional inversion data volume of transverse and longitudinal wave impedances; and predicting the reservoir type of the entire well section of the target well based on the new three-dimensional inversion data volume of elastic impedances. This invention can construct elastic impedance attributes more suitable for reservoir identification based on transverse and longitudinal wave impedances, and can realize reservoir interpretation using a single parameter, overcoming the problem of low sandstone identification accuracy under impedance overlap, and improving the accuracy and efficiency of sandstone reservoir identification.

Method for transmitting digital data between a bottom hole assembly and a surface assembly of a drilling rig, wherein at least one of the bottom hole assembly and the surface assembly comprises a transmitting transducer actuatable to generate acoustic waves propagating in a drilling fluid and the other of the bottom hole assembly and the surface assembly comprises a receiving transducer configured to detect acoustic waves, comprising the following steps : processing in sequence the data by means of convolutional coding, an interleaving operation and at least one spread spectrum modulation technique, obtaining a processed digital signal; - converting the processed digital signal into an analog signal; - actuating the transmitting transducer in such a way as to generate, in the drilling fluid, acoustic waves that correspond to the analogue signal; receiving the analog signal through the receiving transducer; converting the analog signal into a received digital signal; - processing in sequence the digital signal received by means of at least one demodulation technique, one "de- interleaving" operation and one convolutional decoding, obtaining the received data.

The application discloses a kind of fusion well logging data and multi-scale fracture identification method of wavelet transform, belong to oil and gas exploration and development geophysical well logging technical field.This method includes: obtaining the natural gamma, deep and shallow resistivity and acoustic travel time well logging curve of target formation;Curve is adaptively wavelet transformed, and multi-scale feature is extracted;Based on high-frequency component, the fracture response characteristic parameter set containing deep and shallow resistivity difference index, crack coefficient, relative acoustic travel time and natural gamma change rate is constructed;The parameter set is weighted and fused into preliminary fracture intensity parameter;The parameter is nonlinearly enhanced with Sigmoid function and moving average smoothing processing;Finally, the gradient of the smoothed parameter is calculated, and the fracture area is automatically divided by threshold determination and output quantitative evaluation result.The application effectively strengthens the high-frequency abnormal response of fracture, significantly improves the accuracy, stability and anti-interference ability of fracture identification using only conventional logging data.

The application discloses a plug-in type high waterproof proximity sensor, which comprises a first shell, a second shell arranged on the first shell, a probe and a circuit board arranged in the second shell, a first connecting piece arranged in the second shell and mounted on the circuit board, a filling glue layer filled in the second shell, a connecting head mounted at the tail end of the first shell, the second shell comprises a first main body section, a second main body section and a clamping section, the connecting head comprises a seat main body and a second connecting piece arranged in the seat main body, the seat main body comprises a butt joint part and a clamping part connected to one end of the butt joint part, the butt joint part is further provided with a plug-in hole and a clamping hole, the first connecting piece extends into the connecting head from the plug-in hole and is in contact with the second connecting piece, and the clamping section of the second shell is inserted into the clamping hole of the connecting head. The application seals the circuit board and the probe at the same time, guarantees the sealing effect of the first connecting piece and the second connecting piece, and guarantees the service life and the electrical connection performance of the first connecting piece and the second connecting piece.

The application discloses a method, device, equipment, medium and product for predicting fracture complexity of a tight gas reservoir section. The method comprises the following steps: determining a first fracture complexity index according to physical property parameters of cores of the tight gas reservoir section; determining an interlayer fracture mutual influence coefficient according to P-wave data of each layer in the tight gas reservoir section; and determining fracture complexity of the tight gas reservoir section according to the first fracture complexity index, the interlayer fracture mutual influence coefficient and the P-wave data of each layer in the tight gas reservoir section. The technical scheme can shorten the prediction period of the fracture complexity of the tight gas reservoir section, reduce the cost of predicting the fracture complexity of the tight gas reservoir section, and improve the accuracy of the predicted fracture complexity of the tight gas reservoir section.

This utility model discloses an indoor inspection and repair device for sliding hydraulic cylinders, belonging to the field of inspection technology. This utility model solves the problems of existing technologies that cannot effectively check for piston rod misalignment and burrs on the sliding hydraulic cylinder body before installation. This utility model includes a piston rod misalignment inspection mechanism and a sliding hydraulic cylinder burr detection mechanism. The first cylinder of the piston rod misalignment inspection mechanism has a first chamber for accommodating the piston head of the piston rod, and a through groove communicating with the first chamber. The shape and size of the through groove match the shape and size of the piston rod body. The second cylinder has a second chamber for accommodating the first cylinder body, and a groove communicating with the second chamber. The shape and size of the groove match the shape and size of the piston rod end. This utility model can effectively check for piston rod misalignment and burrs on the sliding hydraulic cylinder body indoors, significantly improving work efficiency.

This utility model discloses a standard part inspection device, including a leak-proof device. The leak-proof device consists of a cylinder, an upper pressure plate, a lower pressure plate, a connecting rod, a sensor, and a telescopic rod. The lower part of the upper pressure plate is fixedly connected to the connecting rod, and a through hole is provided on the upper pressure plate. The cylinder is installed above the upper pressure plate, and the telescopic shaft of the cylinder extends through the through hole to the lower part of the upper pressure plate. The lower pressure plate is connected below the telescopic shaft. A connecting block is fixedly connected to the lower pressure plate, and a telescopic rod is provided on the connecting block. A sensor is positioned at one end of the telescopic rod. This utility model achieves the detection function by setting a telescopic rod, which contacts the standard part. The proximity sensor detects the difference in displacement of the telescopic rod when the standard part is present and absent, thus avoiding the problem of frequent damage caused by direct contact between the sensor and the standard part. This leak-proof device achieves leak prevention by indirectly contacting the standard part with the sensor, reducing sensor damage.

This utility model discloses a circumferential initial positioning device for textile spindles, belonging to the field of textile spindles, including a base; a clamping and lifting assembly for clamping the textile spindle and causing it to rise and rotate simultaneously is installed on the base; an oil injection hole positioning mechanism is installed on the base for positioning the oil injection hole of the textile spindle clamped by the clamping and lifting assembly and detecting whether it is centered; the clamping and lifting assembly includes a lifting drive assembly, a lifting assembly, and a clamping and rotating assembly; the base and the lifting assembly are both connected to the lifting drive assembly; the base and the clamping and rotating assembly are both connected to the lifting assembly; the clamping and rotating assembly is connected to the base. Through the above method, this utility model can achieve automatic and precise positioning of the oil injection hole position through the oil injection hole positioning mechanism, facilitating subsequent oiling processes and saving manpower.

The invention belongs to the technical field of oil and gas field exploration and development, and discloses a fractured-vuggy reservoir ground stress prediction method and system based on discrete elements and finite elements. And taking the obtained boundary stress direction and size as boundary conditions, and combining with a pre-constructed fusion model to obtain the three-dimensional stress of the research area, thereby completing the fracture-vuggy reservoir crustal stress prediction process. The construction process of the fusion model comprises the steps that firstly, a discrete fracture network model and a geomechanical grid model are established, then the discrete fracture network model and the geomechanical grid model are fused, after fusion, three-dimensional heterogeneous parameters are given to the fusion model, and the construction process of the fusion model is completed. The method can accurately and efficiently simulate the three-dimensional distribution rule of the current stress field of the fracture-vug type reservoir, and is of great significance to oil-gas exploration and development.

The embodiment of the application provides a marine carbonate high-resolution sequence stratigraphic division method and device, and belongs to the technical field of geological exploration. The method comprises the following steps: obtaining logging data of a target well section, generating a first curve based on the logging data, the first curve being a curve for representing the rise and fall of the paleo-sea level of the target well section; obtaining stable isotope data of the target well section, correcting the first curve based on the stable isotope data, obtaining a second curve, and thus establishing a high-resolution sequence division scheme of a single well; obtaining a seismic profile of the target well section, determining a negative inflection point of the second curve, and calibrating the seismic profile based on different levels of the negative inflection point of the second curve, so as to determine a high-resolution sequence tracking scheme of the target well section; and the application can quickly and conveniently solve the problem of high-resolution sequence stratigraphic division and comparison.

This utility model relates to a special tool for ball-passing tests on boiler pipes, including a ball, a connecting rod, and a driving device. The bottom end of the connecting rod is connected to the ball, and the tail end of the connecting rod is connected to the driving device. The surface of the ball has a polished layer. This structure solves the problem of existing ball-passing tests using compressed air to blow a steel ball through the pipe, where the ball falls into a header and cannot be retrieved. Furthermore, when defects such as inward bulging of the weld seam inside the pipe prevent the ball-passing test from being performed, it is usually necessary to replace the pipe or re-weld where the steel ball cannot pass, a process that is time-consuming and costly.

This invention relates to the field of surface subsidence and deformation technology, and particularly to a method for predicting abnormal surface deformation responses under the coupling of faults and loose layers. This method solves the technical problem of accurately assessing the surface subsidence and deformation patterns caused by coal mining under different geological conditions in existing technologies. The technical solution includes: establishing a three-dimensional numerical model using a Mohr-Coulomb constitutive model and setting the fault zone thickness; establishing eight sets of control experimental models and using the controlled variable method to study the effects of fault dip angle and loose layer thickness; performing simulation calculations by excavating the working face in 13 steps, with each step having a spacing of 30m; and effectively revealing the characteristics of how increasing fault dip angle promotes an increase in the maximum surface subsidence value, and how increasing loose layer thickness leads to an increase in the subsidence value followed by stabilization. This method can effectively assess the abnormal response patterns of surface subsidence and deformation under complex geological conditions.

This invention discloses a bridge pot bearing and control system based on system conversion. A first bearing body and a second bearing body are stacked from top to bottom. The first bearing body has a first mounting plate, and an adjustment component is installed below the first mounting plate. The second bearing body has a second mounting plate, and a test component is installed on the second mounting plate. The test component connects with the adjustment component. While performing pressure testing, the test component, in conjunction with the adjustment component, enables the conversion between three states: fixed pot bearing, unidirectional movable pot bearing, and bidirectional movable pot bearing. This invention monitors the stress on the bearing in real time, calculates the bridge shear force based on the reaction force, and derives the bridge shear force amplification factor under dynamic loads, thus improving bridge design methods and making bridge design safer and more reliable. It can realize the functions of a fixed bearing, a unidirectional movable bearing, or a bidirectional movable bearing, and achieve mutual conversion between bearing types.

This invention relates to a self-learning method and system for home environment regulation based on multimodal feedback and scene awareness. The method collects the user's physiological characteristics and body movement signals through non-contact sensing devices to identify the user's current activity scene. The system integrates the user's explicit intervention operations with implicit comfort feedback based on physiological stability, dynamically assigning fusion weights for explicit and implicit feedback according to the activity scene to generate target feedback labels. An online incremental learning algorithm is used to update the local environmental control model, and a privacy-preserving model aggregation is performed in the cloud through a federated learning mechanism. This invention solves the problems of traditional home control relying on single commands and lacking physiological feedback mechanisms, achieving intelligent closed-loop control that balances user privacy and personalized comfort.

The invention relates to the field of nuclear fuel element manufacturing, in particular to a material boat in-place sensor and a high-temperature continuous sintering furnace. According to the material boat in-place sensor, a spiral spring and a probe piston are arranged in a shell, one end of a contact probe is located in the shell, and the other end of the contact probe penetrates out of the shell; the probe piston slides in the shell and is in contact with the probe piston when sliding to the end part; a piston rod of the probe piston is sleeved with the spiral spring, the tail cover is screwed on the shell through threads, a through hole is formed in the center of the tail cover, and hole threads are arranged on the inner side of the through hole. The pre-tightening nut is assembled on a hole thread on one side of the tail cover, the depth of the pre-tightening nut is adjusted through the thread, and then the initial elastic force of the spiral spring is adjusted. The contact type sensor is assembled on a hole thread on the other side of the tail cover; after the contact probe is triggered, the contact probe moves towards the probe piston and contacts with the probe piston, the spiral spring is compressed, the probe piston is pushed towards the direction of the contact type sensor, and then the contact type sensor is started to generate a control signal. And the material boat in-place sensor is integrally sealed. The material boat in-place sensor is arranged outside the sintering furnace, the real position of the material boat in the sintering furnace can be directly measured, the problem of false triggering of non-contact detection caused by environment change in the furnace is avoided, online maintenance and setting can be conducted outside, and the reliability of long-period operation of the material boat in-place sensor is guaranteed.

The invention belongs to the technical field of oil and gas field exploration, and provides a target reservoir evaluation method and device, a storage medium and electronic equipment, and the method comprises the steps: obtaining a plurality of control factors affecting the reservoir development of a target reservoir, and generating a plurality of geological information planar graphs related to the plurality of control factors; performing gridding processing on any one geological information plane graph in the plurality of geological information plane graphs to obtain a plurality of geological information standardized plane graphs; performing data fusion processing on various geological data acquired from the geological information standardized planar graphs to generate a probability graph of target reservoir development; and generating a corresponding evaluation graph based on the probability graph, and evaluating the target reservoir based on the evaluation graph. Through the evaluation method, objective and accurate evaluation can be performed on the target reservoir based on the evaluation graph finally generated based on the probability graph.

This invention discloses an integrated early warning method and system for detecting and monitoring rockburst disasters, relating to the field of monitoring and early warning technology for dynamic disasters in mine safety and geotechnical engineering. The early warning method includes the following steps: actively acquiring three-dimensional distribution data of resistivity and wave velocity reflecting the rock mass structural field; performing spatial coupling analysis on resistivity anomaly areas and wave velocity anomaly areas to generate a static hazard zoning map; passively receiving acoustic emission, electromagnetic radiation, microseismic, and stress signals generated by rock mass fracturing, and simultaneously acquiring dynamic data reflecting the evolution of the stress field; spatiotemporally fusing the acquired actively detected structural field data with the passively monitored stress field data, and generating a spatiotemporal feature cloud map containing a comprehensive risk index through joint inversion; establishing a risk assessment model based on the dynamic evolution of the spatiotemporal feature cloud map, using multi-parameter spatiotemporal evolution characteristics as early warning criteria, comparing the acquired real-time dynamic evolution parameters with the early warning criteria, and performing graded early warning.