201 results about "Seismology" patented technology

This invention relates to the field of seismic signal resolution enhancement technology, specifically to a seismic signal resolution enhancement method based on adaptive semi-cepstrum transform. The method first obtains the initial amplitude spectrum and phase spectrum of the signal through short-time Fourier transform; then, it introduces bias parameters to perform nonlinear mapping and non-negativity normalization on the initial amplitude spectrum to obtain a normalized amplitude spectrum; based on the normalized amplitude spectrum, it constructs a frequency characterization function and calculates the entropy value to quantify the spectral distribution characteristics; by scanning parameters within a preset range, it establishes the response relationship between the entropy value and the bias parameter, and uses the maximum distance criterion to determine the optimal bias parameter; finally, it substitutes the optimal bias parameter into the nonlinear mapping and normalization process to obtain the corresponding amplitude spectrum, and combines it with the phase spectrum to reconstruct a high-resolution seismic signal. This invention achieves automatic parameter optimization, effectively suppressing high-frequency artifacts while broadening the signal bandwidth, significantly improving the resolution of seismic data.

The utility model discloses a guide wave pole formula microseismic sensor of clear vibration receiving position, including microseismic sensor inner core, the outside of microseismic sensor inner core is wrapped with sensor upper casing, microseismic sensor inner core is connected with the inner core cable, the inner core cable extends outward along sensor upper casing, the outside of sensor upper casing, inner core cable is connected with nut gasket, nut and cable protection head in proper order, the bottom of sensor upper casing is provided with upper recess, this guide wave pole formula microseismic sensor still includes sensor lower casing, be provided with with upper recess cooperation work's lower recess on sensor lower casing, when sensor lower casing and sensor upper casing cooperate and connect after upper recess and lower recess form cylindrical space. The sensor uses guide wave pole installation, and simple operation is efficient, and through changing sensor design, realizes the surface contact of sensor and anchor rod, improves the quality of microseismic sensor acquisition signal.

The present application relates to the technical field of mine safety monitoring and geophysical exploration, in particular to a mine water disaster intelligent alarm system responding to multi-dimensional physical field parameter anomaly, comprising: a full-space data acquisition module: obtaining monitoring area observation data and calling background geological physical model; an ideal benchmark reconstruction module: constructing an ideal physical field benchmark under an anomaly-free state; a double-difference extraction module: calculating observation residuals of observation data relative to the benchmark and theoretical residuals of simulation responses relative to the benchmark; an inversion coupling verification module: driving the theoretical residuals to approximate the observation residuals and extracting parameter sensitivity characteristics; an intelligent alarm decision module: analyzing sensitivity characteristics and convergence state; determining as entity fluid anomaly characteristics to generate an alarm instruction; determining as non-target anomaly interference characteristics to execute signal suppression processing; the present application greatly reduces the false positive rate of mine water disaster detection.

The present application belongs to the technical field of data fusion, and particularly relates to a multi-source geophysical data fusion and intelligent interpretation method for engineering geological survey. The method comprises: obtaining multi-source geophysical data and engineering exposure data of an engineering geological survey area, and mapping to an engineering coordinate system to obtain observation data; generating a spatial evidence unit according to the effective detection range, abnormal response type and data quality of the observation data; back-projecting the spatial evidence unit to a three-dimensional grid to obtain a multi-attribute evidence field; generating a candidate geological body object according to the matching relationship between the multi-attribute evidence field and the geological body observation response mode; correcting the spatial boundary of the candidate geological body object based on evidence residuals, and generating a conflict state identifier according to the contradictory relationship between multi-source observation responses; determining a target geological model according to the corrected candidate geological body object and the conflict state identifier, and outputting a geological body interpretation result. The present application can improve the accuracy of geological body type identification, spatial boundary determination and risk interpretation.

This utility model relates to the field of bridge seepage detection technology, and more particularly to a bridge seepage detection device, including a seepage detection component, an ultrasonic transmitting component, and a handheld component; the ultrasonic transmitting component is located at the rear end of the seepage detection component; the handheld component is located at the lower end of the seepage detection component. This utility model utilizes an ultrasonic generator to emit ultrasonic waves that pass through a second signal transmission protection panel and the ultrasonic coupling agent above it, reaching the bridge structure above the coupling agent. If there are seepage gaps within the bridge structure, the ultrasonic waves are reflected. The reflected ultrasonic waves pass through the first signal transmission protection panel and are detected by an ultrasonic signal receiver, which converts the ultrasonic signal into an electrical signal. The information processing module processes and analyzes the real-time monitored ultrasonic electrical signal to determine whether there is a seepage problem in the bridge in the detection area, thus improving the efficiency and accuracy of bridge seepage detection.

The application provides a microseismic monitoring system sensor network optimization method under a known wave velocity system, first, a control equation between a sensor and a microseismic / acoustic emission source is derived by utilizing a proportional relationship between a propagation distance and time, and a distance difference equation of the microseismic / acoustic emission source is established; second, an optimization function of a single source sensor network layout is constructed according to the distance difference equation and by utilizing fisher information and probability integration of the microseismic / acoustic emission source; then, a sensor network optimization function is constructed under the condition that the entire monitoring area and the probability of the occurrence of the source at different positions are considered; finally, the constructed sensor network optimization function is solved by using an improved coding framework. The method can eliminate the influence of the sensor network on the positioning accuracy and effectively identify the optimal sensor network layout.

A multivariate time series prediction method for microseismic events in coal mining, based on a dual-flow structure, is disclosed. The method comprises the following steps: Step 1) preprocessing the microseismic monitoring data; Step 2) processing the microseismic monitoring data along the variable dimension; Step 3) processing the microseismic monitoring data along the time dimension; and Step 4) concatenating the prediction results from the variable module and the time module to obtain the prediction result. This invention significantly improves prediction accuracy and provides a reliable basis for safety prediction in mining operations.

The application discloses a geophysical model construction system based on VI theory and relates to the technical field of geophysical data processing.The application establishes multiple geological identification layers according to the classification results of multiple source geological data, splits each geological identification layer into a rendering identification area, sets a unique identification tag according to the geological data and the space-time position of each rendering identification area, compares the rendering identification areas at the same space-time position, records the rendering identification areas as temporary anchor areas according to the comparison results, sequentially splices and fuses the rendering identification areas of the same geological data type and different geological data type according to the unique identification tag to obtain a geological physical area, sets a geological data change direction with the temporary anchor area as a data change reference direction, preferentially update the rendering identification area in the corresponding direction according to the geological data change direction, and splices each geological physical area to obtain a geophysical model.

This invention discloses a method and system for measuring the performance indicators of an acoustic logging transducer, belonging to the field of geophysical logging technology. The method derives an admittance circle measurement method using an equivalent lumped system of the transducer; an admittance circle measurement system is constructed based on this method; the electrical parameters of the transducer are measured using this system to obtain the transducer admittance curve and admittance circle diagram; and the transducer's performance indicators are calculated based on these diagrams. This invention provides more accurate measurement results and simplifies the operation of testing the admittance circle and performance indicators of the transducer.

The present application relates to the technical field of geophysical electromagnetic exploration data processing, and specifically discloses a kind of orthogonal digital phase-sensitive detection time-frequency electromagnetic complex response extraction method, automatically extracts base frequency and initial phase using transmitter stored time-stamped current data, constructs zero initial phase orthogonal reference signal, carries out two-way digital phase-sensitive detection to receiver full waveform sampling data, obtains in-phase component and quadrature component, so as to calculate the complex response amplitude and phase information of target frequency.The present application does not need analog phase-locked loop and artificial phase modulation process, can stably extract complex response parameters under strong interference and strong noise background, is especially suitable for array time-frequency electromagnetic receiver full waveform sampling data post-processing, without transmitting current waveform to each receiving node in real time, improves the flexibility and scalability of time-frequency electromagnetic system.

The application discloses a multi-source InSAR image building subsidence recognition method based on space-time feature fusion, and belongs to the field of synthetic aperture radar interferometry and building deformation monitoring. The method comprises the following steps: S1, obtaining radar line-of-sight deformation observation values at each structural line endpoint of a building; S2, constructing a joint adjustment function model with the three-dimensional displacement of the endpoint as a parameter; S3, introducing a structural line length invariable constraint as an adjustment strong condition; S4, iteratively adjusting and solving the optimal three-dimensional displacement solution of each endpoint; and S5, recognizing uneven subsidence according to the displacement vector difference of adjacent endpoints. The multi-source InSAR image building subsidence recognition method based on space-time feature fusion introduces the rigid geometric structure constraint of a building, reliably reverses one-dimensional observation of a radar line-of-sight into three-dimensional deformation of a building structure key point, and realizes fine recognition and quantitative analysis on uneven subsidence in the building.

This utility model relates to the field of seismic bracing technology and discloses an inclined fixed seismic bracing system, including a supporting top plate. A limiting sleeve is fixedly connected to the bottom of the supporting top plate. Limiting holes are provided on both the left and right sides of the limiting sleeve. A button is engaged inside each limiting hole. A return spring is fixedly connected to the inner wall of the button. A telescopic connecting rod is fixedly connected to the surface of the return spring. A connecting plate is fixedly connected to the bottom of the telescopic connecting rod. This inclined fixed seismic bracing system, through the coordinated arrangement of the supporting top plate, limiting sleeve, limiting holes, button, return spring, telescopic connecting rod, and connecting plate, allows the user to press the button to compress the return spring, causing the telescopic connecting rod to disengage from the single limiting hole and engage with the corresponding limiting hole for fixation. This serves to adjust the installation height of the inclined fixed seismic bracing system as needed.

To provide a base isolation device which is not subject to transportation restriction and capable of dealing with large deformation while supporting a superstructure and to provide a base isolation structure provided with the base isolation device.SOLUTION: A base isolation device 10 comprises: a slide bearing 18 which is installed in a base isolation layer 16 between a superstructure 12 and a substructure 14 and supports the superstructure 12; and a laminated rubber bearing 20 which is installed at a distance from the slide bearing 18 in a horizontal direction. The slide bearing 18 has: a slide section 22 which is installed on an upper face of the substructure 14; and a friction section 26 which is installed on a lower face of the superstructure 12 and capable of relatively sliding on a surface of the slide section 22. The slide section 22 is made up of a plurality of chips 22A connected to each other in a direction that the slide section 22 is extended.SELECTED DRAWING: Figure 1

This application belongs to the field of mine radiation protection and safety monitoring technology, specifically relating to a method and system for locating radon anomaly sources in mines based on causal graphs. The method includes: standardizing the original data matrix to obtain a feature matrix; obtaining a directed acyclic graph (DAG) based on the feature matrix; using the DAG and the set of parent nodes, constructing marginal distributions for the root node and conditional distribution estimators for the child nodes to obtain a global distribution estimator; calculating the intervention distribution of the feature subset based on the global distribution estimator; calculating the causal Shapley value based on the intervention distribution; retraining the anomaly prediction model after feature filtering to obtain the final anomaly source model; and inputting actual radon concentration time-series data into the final anomaly source model to obtain the anomaly source location. This application has the effect of accurately distinguishing anomaly sources at different locations and achieving globally convergent radon anomaly source location.

This invention discloses a microseismic location method and related equipment with residual time difference correction. The method includes: acquiring and preprocessing continuously recorded microseismic waveform data; selecting multiple microseismic events for diffraction stacking to obtain multiple location results; calculating travel time to perform dynamic time difference correction on the event waveform records, and stacking the microseismic event gathers to obtain multiple reference gathers; calculating the residual time difference of each trace of multiple microseismic events; arithmetically averaging the multiple residual time differences to obtain the final residual time difference; using the final residual time difference to perform residual time difference correction on all continuously recorded microseismic data, and performing diffraction stacking to obtain the final location result. This invention effectively improves the detection effect and location accuracy of low signal-to-noise ratio microseismic events by using cross-correlation to calculate the residual time difference, correcting the time difference of each data trace, and then performing diffraction stacking for location, thereby enhancing the effectiveness of ground microseismic monitoring.

The application belongs to the technical field of microseismic signal processing, and in particular to a low signal-to-noise ratio microseismic signal denoising method and system. The method comprises the following steps: collecting multiple seismic time sequence signals; reconstructing the multiple seismic time sequence signals by using multivariate singular spectrum analysis to obtain reconstructed signals; splicing the reconstructed signals and the original multiple seismic time sequence signals to obtain a two-channel input data set; and inputting the two-channel input data set into a U-Net network for end-to-end recovery. The application significantly improves the recovery capability and phase preservation of weak seismic signals in an ultra-low signal-to-noise ratio environment.

This invention relates to the field of geological risk identification technology, specifically to a method, equipment, and system for geological risk monitoring and early warning that integrates multi-source data from mines. The invention constructs a polarity-consistent cumulative field curve by analyzing the radiation energy and polarity consistency of microseismic events, then identifies the transition interval between shear and tension by obtaining the continuously rising segment of the cumulative field curve. Corrected stress data is obtained by identifying and correcting isolated spikes and oscillations caused by blasting. Candidate intervals for relaxation inflection points are determined by detecting the continuously falling segments of the corrected stress data. By introducing a historical matching queue, the time delay characteristics between the transition interval and the candidate interval are analyzed, and causal matching is performed on the transition interval and the candidate interval based on the stress drop intensity to determine the risk probability of each mining cycle window. This invention can adaptively adapt to time delay drift, significantly reducing false alarms and missed alarms, identifying instability precursors earlier, and significantly improving the reliability and timeliness of geological risk early warning.

The present application provides a deep learning-based open-pit mine stope deep hollow area microseismic three-dimensional positioning method, and relates to the technical field of open-pit mine microseismic positioning. Based on the waveform data collected by the multi-channel sensor, the time difference matrix is constructed by calculating the arrival time difference of any two channels, and the precise regression of the source location and the time of origin is realized without relying on the complete velocity field, which significantly improves the positioning adaptability and reliability in the empty area environment. Further, the present application introduces a binary virtual mask mechanism, explicitly marks the channels that do not collect microseismic waveforms, and inputs the time difference matrix and the mask channel into the double-channel convolutional neural network with fusion inflation convolution, residual connection and lightweight multi-head self-attention mechanism, enhancing the model's ability to perceive missing information. Through a dynamic missing simulation training strategy, the model is constantly exposed to different missing patterns during the training stage, thereby having stronger generalization ability and robustness.

This utility model discloses a low-power, long-distance base station networking device for data transmission in geophysical exploration construction management. It includes a base station networking device and a server. The base station networking device consists of an antenna, a communication module, an MCU microcontroller, a 4G DTU module, a power supply module, and a battery. The antenna is connected to the communication module, and the communication module is connected to the MCU microcontroller. The MCU microcontroller wirelessly connects to the server via the 4G DTU module. Compared with existing technologies, this utility model solves the problem of data relay in geophysical exploration construction management. Based on the Si4432 communication module wireless relay method, it achieves low-power, long-distance data transmission. If a connection is established between the base station and the server, data is directly transmitted back to the server via the 4G module. If the connection between the base station and the server is interrupted, the base station forwards data packets to other corresponding base stations, which then transmit the data back to the server.

The application discloses a buried pipeline positioning geophysical prospecting method based on gas acoustic waves, and the method comprises the following steps: obtaining pipeline preset information of a to-be-detected operation area; generating a pipeline estimated path according to the pipeline preset information, and determining a corresponding target acoustic excitation mode through a preset excitation parameter library; generating a control instruction to inject a coded acoustic signal into the pipeline based on the target acoustic excitation mode, and synchronously obtaining response signal data collected by a sensor array moving along the pipeline estimated path; calculating and obtaining a planar trajectory of the pipeline in the ground through a beam forming algorithm based on the response signal data; obtaining the buried depth of the pipeline through a preset propagation attenuation model based on the coded acoustic signal and the response signal data; and outputting a pipeline detection result based on the planar trajectory of the pipeline in the ground and the buried depth of the pipeline. The application realizes high-precision and anti-interference pipeline detection by using the recognizability of coded acoustic waves and the spatial resolution capability of array beam forming.

This invention discloses an installation assembly for a fiber optic microseismic sensor for roof surrounding rock, relating to the field of microseismic monitoring technology in coal mines. Addressing the problems of poor coupling effect, easy loosening and detachment, signal attenuation, and low monitoring accuracy of existing fiber optic microseismic sensors, this invention includes a fiber optic microseismic sensor, a locking mechanism, and a grout injector. The sensor is initially fixed to the borehole top wall of the roof surrounding rock with an anchoring agent. The locking mechanism clamps the lower part of the sensor through a fixed sleeve with protrusions. The grout injector is located below the locking mechanism; its internal flow channel can inject cement grout into the upper borehole space, filling all gaps between the sensor, the fixed sleeve, and the borehole wall, achieving tight and effective coupling between the sensor and the surrounding rock. This invention can significantly improve the microseismic signal transmission efficiency and monitoring accuracy, prevent the sensor from loosening and detaching due to surrounding rock deformation and mining activities, meet the needs of long-term stable monitoring underground, and ensure the safety of coal mining.

This invention discloses a method for obtaining the quality factor based on stable trend frequency, comprising the following steps: S1 acquiring first arrival records, which include time-domain data and first arrival information; S2 lengthening the time-domain data and converting the lengthened time domain into a frequency domain to obtain the spectrum of the first arrival records; S3 extracting first frequency data from the spectrum and obtaining second frequency data based on the variation characteristics of the first frequency data; S4 calculating the quality factor Q value based on the second frequency data and the first arrival information. This invention also discloses a device, equipment, and medium for obtaining the quality factor based on stable trend frequency. This invention obtains a highly accurate Q value by lengthening the first arrival data, employing a stable trend frequency method, and optimizing the Q-value calculation algorithm. This method is not only applicable to obtaining Q values ​​from dual-well micrologging data but can also be extended to obtaining Q values ​​from seismic single-shot records.

The application provides a microseismic real-time monitoring method and device based on compressed sensing and 5G node collection, solves the problem that microseismic monitoring data is easy to be submerged in noise interference, and microseismic data collection equipment cannot transmit data in real time, or the transmitted data is uneven and incomplete. It comprises the following steps: collecting data, establishing a geological and geophysical model, simulating fracturing based on the parameters of the well to be fractured to demonstrate the parameters of the microseismic monitoring observation system; establishing an adaptive optimal learning dictionary to form a compressed sensing collection scheme; conducting a due diligence investigation of field obstacles and interference sources to form a compressed sensing active obstacle avoidance scheme; using a 5G node collection system to collect field data; applying compressed sensing data reconstruction technology to reconstruct the collected field data to form three-dimensional microseismic monitoring data; carrying out microseismic data processing and interpretation, and feeding back the microseismic analysis results to the fracturing site to realize real-time monitoring of the fracturing construction process.

This invention relates to the field of geophysical exploration technology, specifically to a multi-channel adaptive subtraction method and system for protecting target strata. The method includes optimized layer protection multi-channel adaptive subtraction processing after combining multi-channel layer protection models (masks). This method solves the problem that since multiple waves and primary waves in the original data do not completely satisfy the orthogonality condition, the effective signal is usually damaged during the adaptive subtraction process. It has the technical effect of effectively protecting the primary wave of the target strata and achieving a significant optimization and improvement in the matching subtraction results.

The application provides a kind of deep thick ore body three-dimensional panel space arrangement mining monitoring device and method. First, the three-dimensional mining panel of deep thick ore body is deployed with multi-field collaborative monitoring system, including distributed mining stress monitoring system and independent microseismic monitoring array, and mining stress data and microseismic information in the whole process of panel mining are collected synchronously. Then, the mining stress data and microseismic information are matched in time synchronization and space reference, and the panel state data sequence synchronized with the mining time sequence is generated. Then, the stress concentration coefficient and microseismic activity index are calculated and generated from the state data sequence. According to the time sequence coupling evolution characteristics of the stress concentration coefficient and microseismic activity index, the local rock mass instability precursor of the three-dimensional panel is judged. The above scheme can realize the spatio-temporal integration of multi-source data, accurately capture the complex coupling characteristics, and improve the timeliness and reliability of rock mass instability warning.

This invention discloses a method for designing borehole pressure relief parameters based on fracture propagation characteristics, comprising the following steps: S1, selecting a coal sample from the target coal seam and processing it into a test specimen; S2, using a three-dimensional imaging system to scan and reconstruct the sample to obtain the original fracture distribution information of the sample before pressure relief; S3, under the condition of keeping the stress constant, drilling and pressure relief are performed on the sample using preset parameters; S4, during the borehole pressure relief process, using an acoustic emission system to collect the acoustic emission signal of the sample in real time during the pressure relief process to obtain the dynamic propagation information of the fractures inside the sample; S5, using a three-dimensional imaging system to scan and reconstruct the sample again to obtain the fracture distribution state of the sample after pressure relief; S6, based on the fracture distribution state before and after pressure relief, the acoustic emission signal, and the propagation characteristics of the fractures themselves, comprehensively analyzing and determining the fracture propagation mode of the sample under borehole pressure relief, and designing or optimizing the borehole pressure relief parameters based on the fracture propagation mode.

The application discloses a kind of mass geophysical prospecting data storage retrieval and drawing method in mobile terminal map under offline state, it includes: (1) mobile terminal geophysical prospecting data is stored using embedded relational database sqlite, and table is respectively built according to project, view level;(2) when map program runs, according to the level of map display, view range, project authority in lower level, retrieve, render data in the data table of corresponding level;In high level range, only render all line data that meet the conditions according to project authority;(3) when user carries out map zooming, moving operation each time, first retrieve operation of geophysical prospecting data is carried out, according to the result of retrieval, drawing is carried out in batch in different layers;(4) the default map range of first opening of map application is controlled.The application can bring very intuitive efficiency improvement to construction planning management, vehicle mobile navigation, efficient production organization of geophysical prospecting project, the prospect is very broad, and it has very important significance.

The seismic isolation device has a simple structure and can be made lightweight. [Solution] The seismic isolation plate 10 comprises a fixed plate 12 which has multiple rows of fixed ribs 12A formed on its top and is installed with its bottom surface in contact with the floor surface G, and a sliding plate 14 which has multiple rows of sliding ribs 14A formed on its bottom in a direction intersecting the fixed ribs 12A, and is placed with its bottom surface in contact with the upper surface of the fixed ribs 12A, and the object to be seismically isolated 20 is placed on the upper surface of the sliding ribs 14A.

The present invention provides a seismic isolation device capable of preventing buckling of a coil spring and obtaining a stable response even when earthquake motion of a design exceedance level acts. A seismic isolation device (1) according to the present invention is provided with: a coil spring (6) fixed to an upper structure (2) and a lower foundation (3); and a buckling prevention mechanism (5) provided with a support mechanism (10) and a sliding surface (13). The support mechanism (10) has one end fixed to the upper structure (2) or the lower foundation (3) and the other end provided with a sliding member (12). The sliding surface (13) is fixed to the lower foundation (3) or the upper structure (2), and is provided at a position facing the sliding member (12). The sliding member (12) is not in contact with the sliding surface (13) in a stationary state.