184results about "Seismic energy generation" patented technology

The invention discloses a monitoring system and method for determining an abnormal geologic body based on distributed optical fiber sound wave vibration, and relates to the technical field of distributed optical fiber sound wave detection.The monitoring system comprises a distributed optical fiber sensing unit, a signal excitation unit, a photoelectric demodulation unit, a signal processing and analyzing unit, a result recording and outputting unit and the like; the distributed optical fiber is used for continuously collecting stratum vibration response; the signal excitation unit applies controllable disturbance to a known reference position to induce a potential abnormal geologic body to generate an inactive excitation response signal; the photoelectric demodulation unit performs phase demodulation on backscattered light transmitted back by the optical fiber to form distributed vibration measurement data; and the signal processing and analyzing unit is used for filtering and denoising the data, establishing a quantitative mathematical model of a signal incident angle and signal intensity, solving an epicentral distance and an incident angle and calculating the spatial position of an abnormal geologic body by combining propagation attenuation correction and least square inversion, and is suitable for dangerous section identification and avoidance decision before mining and construction.

The invention belongs to the technical field of excitation detection, and provides a movable seismic source system carried by a deep mine heading machine and a positioning excitation detection method, which are characterized in that the excitation time delay of each seismic source unit in an array is accurately controlled by utilizing a controllable seismic source, so that the seismic source units form synchronous superposition in a specific direction, and the detection of an active source is realized; in the aspect of passive source detection, vibration generated when the jumbolter cuts surrounding rock is used as a vibration source, a pilot sensor installed near an anchor rod drill is used for recording an original vibration signal, namely cutting vibration, when the jumbolter works, and signals collected when the jumbolter works and signals collected by the pilot sensor are subjected to cross-correlation processing, so that the original vibration signal is obtained. And reconstructing a virtual seismic source, and then carrying out data processing and passive source imaging. And the active source detection result and the passive source detection result are combined to interpret the unfavorable geologic body, so that the detection of the position is realized, and the geological interpretation of the whole space of the mine can be realized.

The invention belongs to the technical field of source vehicle corollary equipment, and particularly relates to a drop hammer source anti-secondary excitation device, which comprises an anti-secondary excitation body, the anti-secondary excitation body comprises a controller and a mounting plate, the mounting plate is provided with a mounting hole, the mounting plate is fixedly mounted on a source vehicle, and the controller is connected with the controller. A clamping assembly used for clamping a drop hammer is installed on the installation plate, a sound sensor used for detecting sound is installed on the installation plate, through the sound sensor and a controller, the clamping assembly is triggered to clamp the drop hammer, signal interference caused by secondary excitation of the drop hammer is blocked, and the accuracy and reliability of exploration data acquisition are ensured. Meanwhile, the workload and difficulty of subsequent seismic wave signal processing are greatly reduced, and the blank in the prior art is filled.

The application provides a double-side opening cabin type negative pressure air gun source and a firing method thereof, and belongs to the field of marine seismic exploration.The application comprises two upper and lower symmetrical firing units on the basis of the existing negative pressure air gun source and the single-side negative pressure air gun source, the firing cabin is surrounded by the firing cabin housings of the two firing units, each firing unit comprises a pushing cabin and a returning cabin, the pushing cabin is in a high pressure state, the returning cabin is in a vacuum state, the differential pressure makes the firing unit realize the effect of rapid opening of the cabin, and the implosion energy can be fully released.In addition, the two firing units of the application are synchronously fired, the opening speed can be further improved, the stress during the opening process is uniform, and the shaking of the cabin body is reduced.The double-side opening cabin mode can improve the consistency of the wavelet and improve the quality of the seismic data.

The application belongs to the technical field of tunnel geological advanced prediction, and provides an electromagnetic controllable excitation device and method for longitudinal and transverse wave excitation of a deep-buried tunnel. The excitation device comprises a body, longitudinal and transverse wave excitation plates arranged on the body, and a rotating mechanism arranged on the body. The longitudinal and transverse wave excitation plates are perpendicular to each other, and the rotating mechanism is connected with a mechanical arm. The rotating mechanism is used to realize the operation switching of the longitudinal and transverse wave excitation plates at the same physical position, and longitudinal and transverse wave excitation is performed. The longitudinal and transverse wave excitation functions are integrated in a single excitation device, the structure is compact, and the device is suitable for operation requirements in a narrow space area in a tunnel. The rotating mechanism is used to realize 90-degree rapid switching, the detection efficiency is greatly improved, the physical positions of two times of excitation are completely consistent, and the data comparability is improved.

The utility model belongs to the technical field of exploration, and provides a high-power electric spark source transmitting probe, which comprises a first electrode, a second electrode, a first insulating part, a second insulating part, a discharge ring and a locking part, the first insulating part is arranged in the first electrode; the second electrode sleeves the inner side of the first insulating part, and the first end of the second electrode extends to the outer side of the first electrode opening; the discharge ring sleeves the outer side of the first end of the second electrode; the second insulating part is clamped between the discharge ring and the first electrode; the locking piece is used for locking the discharge ring and the second insulating piece to the outlet of the first electrode, and the first electrode is filled with high-voltage insulating glue. After the emission probe discharges, quick-wear parts such as the discharge ring and the second insulating part can be disassembled by disassembling the locking part, and the second insulating part and the discharge ring can be quickly replaced. Meanwhile, the first electrode is filled with the high-voltage insulation paste, so that the stability of the second electrode can be improved, and the phenomena of current leakage and the like in the first electrode can be prevented.

The invention belongs to the field of earth exploration, and provides an urban underground collapse hidden danger area rapid detection system and method.The urban underground collapse hidden danger area rapid detection system comprises a miniature intelligent sensor array and a central processing unit, the miniature intelligent sensor array comprises a plurality of detection lines arranged side by side, and each detection line comprises a plurality of miniature intelligent sensors arranged at intervals; the adjacent micro intelligent sensors on the same detection line are connected through a towing cable; the distance between the adjacent micro intelligent sensors is adjustable; and the central processing unit is used for receiving the vibration data acquired by each miniature intelligent sensor, performing inversion on the vibration data by using a background noise surface wave imaging algorithm to obtain an underground transverse wave velocity structure model, and identifying a low-speed abnormal region as a collapse hidden danger region. According to the invention, efficient, accurate, wide-coverage and non-sensitive detection of urban underground collapse hidden dangers can be realized.

This invention relates to the field of earthquake loss assessment technology and discloses a method for assessing the functional loss of urban medical buildings that incorporates site characteristics of seismic zones. The method obtains seismic parameters for the target area, constructs an earthquake occurrence model based on the truncated G-R formula, and generates several simulated earthquake events using stochastic simulation. Based on the seismic design code response spectrum of the site where the medical building is located, natural seismic waves with similar spectral characteristics are selected from the earthquake database. The theoretical peak ground acceleration (PGA) at the medical building is calculated based on the simulated earthquake events, and the PGA is used to modulate the amplitude of the natural seismic waves to obtain the acceleration time history of the input seismic wave corresponding to each simulated earthquake event. The medical building is systematically divided, and a probabilistic seismic demand model and a probabilistic seismic vulnerability model are constructed. Combining repair costs and component importance coefficients, the overall functional loss assessment result of the medical building system is obtained. This invention improves the accuracy of the assessment results.

The invention belongs to the technical field of deep mineral resource development, and provides a rock mass catastrophe sound wave detection sensing method and system for deep solid resource mining, an observation system is arranged, a controllable seismic source is arranged in the middle of the observation system and used for exciting seismic waves, a sensor is arranged on a mining equipment tool bit and used for detecting a passive source, and a rock mass catastrophe sound wave detection sensing system is arranged in the middle of the observation system. The positions of the vibroseis and the sensor are adjustable, and a certain depth adjusting range is achieved; active detection is carried out on the underground medium by using the vibroseis; then carrying out passive source detection; the signals are processed by adopting a mutual drying method, the mutual influence among the sensors of the observation system is removed, and the data are enhanced by adopting a wave field superposition technology according to the signals processed by adopting the mutual drying method; and performing inversion processing on the enhanced signal data by adopting a reverse time migration imaging technology, and reconstructing an underground rock mass structure. The problem that rock catastrophe information cannot be obtained in time in a traditional method is solved.

The invention discloses an electromagnetic ejection seismic source for seismic exploration in a well and an excitation method, which can continuously excite seismic waves, realize flexible output of seismic wave frequency and energy level, meet the requirement of shallow exploration for high-frequency signals in the well and adapt to the requirement of middle and deep layers for low-frequency signals. The seismic source comprises a control system, a shell and an electromagnetic ejection system, the control system is arranged at the top of the shell, the electromagnetic ejection system is arranged in the shell, the electromagnetic ejection system is connected with the control system, and the control system is used for controlling the electromagnetic ejection system, so that the electromagnetic ejection system hammers the well wall from the two sides of the shell at the same time, and the same seismic waves are generated on the well walls on the two sides of the shell at the same time; the excitation method comprises the steps of setting parameters, charging the high-voltage capacitor bank, charging the coil to enable the catapult to move in an accelerated mode, powering off the coil after the catapult reaches a balance position, enabling the hammer body to hammer a well wall when the catapult moves to a limit position, powering on the coil to enable the catapult to move reversely to enable the hammer body to return to an initial position after hammering delay time is reached, and the like.

A method can include receiving seismic data of a subsurface region; performing an iterative full waveform inversion using at least a portion of the seismic data to generate a model of the subsurface region, where the performing includes, after one or more iterations of the full waveform inversion, automatically selecting one or more parts of the seismic data for inclusion in the at least a portion of the seismic data based on data classification using one or more quality attributes; and outputting the model of the subsurface region.

The invention relates to the technical field of oil-gas well exploration, in particular to an oil-gas well drill bit advanced detection method for unfavorable geology. According to the technical scheme, the method comprises the following steps of S1, installing a probe device, S2, exciting a detection signal while drilling, S3, receiving a reflection and scattering signal, S4, preprocessing an underground signal and extracting features, S5, compressing data and uploading the data in real time, S6, processing and imaging ground data, S7, interpreting geology and identifying risks, and S8, generating early warning and decision support. The advanced detection device has the beneficial effects that the advanced detection device is directly integrated on the drill bit, the drill bit is used as a part of a detection source or a sensor, drilling and detection are carried out at the same time, and early warning is sent to the drill bit before the drill bit encounters an unfavorable geologic body; therefore, precious time is won for adjusting drilling parameters, optimizing a well body track or starting a safety program, and the safety, efficiency and economic benefits of drilling are fundamentally improved.

A method is provided for statics correction of seismic data comprising a plurality of traces representing signals recorded by each of a plurality of seismic receivers disposed proximate to an area of Earth's subsurface to be evaluated. The signals are in response to one or more actuations of one or more seismic energy sources. The method includes identifying arrival times of refraction events in each of the plurality of traces. Long wavelength statics components and short wavelength statics components are separated from the arrival times. The separated long wavelength statics components are used as input to a refraction analysis to generate a velocity model of Earth's subsurface.

This invention belongs to the field of analog integrated circuit technology, specifically relating to a frequency adaptive circuit for downhole detection. This invention utilizes a closed-loop adaptive feedback mechanism, employing multiple excitation frequencies generated by a frequency generator to continuously match and adapt to the transducer's resonant frequency. When a set of excitation frequencies achieves the highest matching degree with the resonant frequency, the echo energy reaches its peak. The frequency generator is adaptively adjusted based on the excitation frequency corresponding to the maximum peak signal obtained during the detection phase, and this optimal excitation frequency is used to generate the excitation signal in subsequent operations, thus completing the adaptation between the excitation frequency and the resonant frequency. This invention effectively avoids the influence of downhole temperature and pressure changes on the transducer's resonant frequency, and combines high automation, good real-time performance, and high imaging quality.

The invention belongs to the technical field of tunnel geology advanced prediction, and provides an electromagnetic controllable excitation device and method for longitudinal and transverse wave excitation of a deep tunnel, a vibration exciter comprises a body, a longitudinal wave excitation plate and a transverse wave excitation plate which are arranged on the body, and a rotating mechanism arranged on the body; the longitudinal wave excitation plate and the transverse wave excitation plate are perpendicular to each other, and the rotating mechanism is connected with the mechanical arm. Operation switching of the longitudinal wave excitation plate and the transverse wave excitation plate at the same physical position is realized through the rotating mechanism, and excitation of longitudinal waves and transverse waves is carried out; the longitudinal wave excitation function and the transverse wave excitation function are integrated into a single vibration exciter, the structure is compact, the device meets the operation requirement of a narrow space area in a tunnel, 90-degree rapid switching is achieved through the rotating mechanism, the detection efficiency is greatly improved, it is ensured that physical positions of two times of excitation are completely consistent, and the data comparability is improved.

The application discloses a non-explosive seismic source device and a shock method for seismic exploration, relates to the technical fields of seismic exploration and blasting, and comprises a blasting cylinder, a top cover and a pipe plug, the pipe plug is arranged in the blasting cylinder, one end of the blasting cylinder is sealed, the other end is connected with the top cover through threads, and a gas-stopping pad, a sponge column and a gas generator are sequentially arranged in the blasting cylinder. The non-explosive seismic source device and the shock method for seismic exploration have the advantages of simple structure, easy material acquisition, no influence of the use environment, no harmful gas generation, no need of approval procedures, no need of a blasting operation certificate for an operator, easy operation after simple training, good coupling between the device and a stratum, use in complex terrain areas, use in water areas such as lakes and oceans, and high safety and good operability compared with a gas explosion seismic source.

The utility model discloses a semi-explosion type transverse wave source based on high-pressure gas explosion near-field waveform regulation and control, which comprises a cylindrical detonation tube, a gas chamber is arranged in the detonation tube, one side of the gas chamber is an arc-shaped surface, the central axis of the arc-shaped surface is consistent with that of the detonation tube, the other side of the gas chamber is an isolation surface, and the isolation surface is arranged on the detonation tube. A groove consistent with the detonation tube in the extending direction is formed in the side, close to the isolation face, of the tube wall of the detonation tube to form a waveform regulation and control chamber, an annular notch groove is formed in the side, close to the arc-shaped face, of the tube wall of the detonation tube, and sealing heads are arranged at the two ends of the detonation tube. The semi-explosive shear wave source realizes near-field waveform regulation and control on a high-pressure gas detonation pressure field through structural design, performs near-field waveform regulation and control on the pressure field generated by detonation through structural design of the detonation tube, enables the energy proportion of a generated shear wave signal to be amplified, is a brand-new shear wave source generation way, and can be applied to the field of high-pressure gas detonation. The system has the advantages of being strong in transverse wave signal, environmentally friendly, good in economical efficiency, good in field adaptability and the like.

The application discloses an automatic planning method and device for a walking route of a land controllable seismic source, and belongs to the field of physical exploration. The application introduces a TSP idea, and finally obtains a seismic source vehicle driving route which is short in path, less in barrier crossing, less in driving restriction, and in line with the driving operation habit of a driver through steps of constructing a map, setting relevant parameters and weight ratios, and solving the walking route of the land controllable seismic source by using a TNH combination algorithm. The application combines the advantages of a two-approximation algorithm, a Heuristic algorithm and an NSGA_II algorithm to propose the TNH combination algorithm for solving the walking route of the land controllable seismic source, so that the automatic planning of the walking route of the controllable seismic source is realized, the operation efficiency is accelerated, the accuracy of operation results is improved, the calculated route is more in line with the demand of field construction, and the exploration operation is further developed intelligently. The application is applied to the field of physical exploration to plan the walking route of the controllable seismic source.

To enable accurate correction of the internal time. [Solution] The data processing device 1 includes a temperature determination unit 181 that determines the seabed temperature at the location on the seabed where a measuring device is installed that creates measurement data of seismic waves associated with an internal time in which seismic waves were detected in response to vibration waves being emitted from the source of the earthquake; a temperature reduction unit 182 that lowers the temperature of an oscillator 41 built into a measuring device located outside of seawater to the seabed temperature; a rate measurement unit 183 that measures the aging rate, which is the rate of change in the frequency of the oscillator 41 over time, when the temperature of the oscillator 41 built into the measuring device located outside of seawater has reached the determined seabed temperature; and a correction unit 188 that corrects the internal time associated with the measurement data based on the aging rate after the measuring device installed on the seabed has created the measurement data.

The utility model belongs to the technical field of seismic exploration equipment, and provides a seismic source mechanism for seismic exploration, which comprises a bottom plate, and four corners of the bottom plate are provided with mounting holes penetrating along the vertical direction; the supporting legs are arranged in the four mounting holes in a sliding and penetrating mode, universal wheels are installed at the bottom ends of the supporting legs, and limiting holes are formed in the outer surfaces of the supporting legs; the two ends of the sleeve are each in threaded connection with one limiting rod; the limiting mechanism is installed on the bottom plate, the limiting rod is arranged on the limiting mechanism in a penetrating mode, and the limiting mechanism is used for limiting circumferential rotation of the limiting rod; the sleeve rotates to drive the two limiting rods to stretch into or retract out of the two oppositely-arranged limiting holes at the same time.

This invention provides a method, apparatus, and system for earthquake prediction based on repeated seismic signals, relating to the field of seismic surveying technology. It receives signals from at least two receiving sensors. The received signals are electrical signals corresponding to a second acoustic signal obtained after reflection from a first acoustic signal emitted towards a target geological fault by an excitation source. The system calculates the coma wave velocity of the signals to obtain the change in coma wave velocity over time. Based on the change in coma wave velocity over time, the time range corresponding to the seismic nucleation process in the target geological fault is determined. Since the excitation and reception of acoustic signals are easily implemented under both laboratory and field conditions, and are unaffected by the environment, the accuracy is high. This allows the coma wave velocity determined by the acoustic signals to accurately characterize the seismic nucleation process, and it is also easily implemented under field conditions.

Systems and techniques are provided for seismic acquisition operations. The displacements among activation positions of the seismic sources are random values or selected from a predefined list to accelerate progress to cover the area of interest. Regular or irregular perturbations (e.g., random values or selected from a predefined list) in a crossline direction are used for source line spacings and sail line move ups. The source line spacings are fixed or varied with respect to time during the seismic survey. The seismic sensors are spaced at regular or irregular intervals. Complete coverage are attained by performing interpolation techniques to the acquired seismic data. An image reconstruction from the collected seismic survey data, which are processed with compressive sensing techniques before the reconstruction, are generated based in part on an inversion technique or an imaging algorithm.

The invention belongs to the technical field of geological exploration, and particularly discloses a symmetrical excitation anti-explosion geological exploration system and method, and the method comprises the steps: receiving array multi-channel signals at two sides, and carrying out the time alignment correction of all channel signals, so as to eliminate the time delay; a multi-channel cross-correlation matrix between the left array and the right array is constructed based on the aligned signals, and matrix elements are obtained through integral cross-correlation operation of array channel signals on the two sides; performing low-rank decomposition on the cross-correlation matrix, and extracting the first k main components as public noise modes; carrying out inversion calculation on the contribution of each noise mode in each acquisition channel, and reconstructing a channel noise component; and subtracting the reconstructed noise component from the original signal, and outputting a purified geological reflection signal. The method does not need special hardware, can accurately suppress the homologous low-frequency noise of the tunnel, improves the signal-to-noise ratio of the signal and the geological imaging resolution, and is suitable for geological detection of closed spaces such as the tunnel.

The application provides a method and device for determining a quality parameter of a controllable source and a computer device, and belongs to the technical field of geophysical exploration. The method comprises the following steps: determining a first force signal and a second force signal, the first force signal being a time-domain force signal excited by the controllable source, and the second force signal being a frequency-domain force signal corresponding to the first force signal; segmenting the second force signal to obtain a plurality of sub-signals, the scanning bandwidth of each sub-signal being less than one time of the starting scanning frequency of the sub-signal; determining a target frequency band in the second force signal based on the effective scanning point number and the plurality of sub-signals, the target frequency band being a frequency band corresponding to a fundamental wave signal in the first force signal; performing time-domain conversion on the target frequency band in the second force signal to obtain the fundamental wave signal in the first force signal; and obtaining the quality parameter of the controllable source based on the first force signal and the fundamental wave signal, the quality parameter being used for determining the quality of the first force signal, and the accuracy of determining the quality of the force signal of the controllable source is improved.

This application relates to a method for determining remaining shot pairs, a method for determining the vacancy and occupancy of geophysical equipment, electronic equipment, and a method for rolling operation of geophysical equipment, relating to the field of seismic data acquisition technology in petroleum exploration. The method for determining remaining shot pairs includes: determining shot point data for all shot points to be excited in the scheme, geophone point data for all geophones in the scheme, and shot-geophone relationship data based on work area data and acquisition construction scheme; determining the shot pair values ​​of geophones falling within a preset acquisition construction template range based on the above data; and determining the remaining shot pairs of geophones based on the shot pair values ​​of the geophones and the information of shot points already excited within the acquisition construction template range obtained during construction. The method further includes: when the remaining shot pair value of a geophone within the acquisition construction template is 0, moving the geophone within the template to the preset position of the geophone in the next round of the construction scheme, and calculating the remaining shot pairs of the geophone.

The application provides a controllable source scanning method and device, electronic equipment and storage medium, and belongs to the technical field of seismic exploration. A first scanning signal is used to excite a plurality of different surfaces of a weight and a flat plate, and weight acceleration and flat plate acceleration on the plurality of different surfaces are obtained respectively; a phase difference between the weight acceleration and the flat plate acceleration is obtained, and sample resonance frequencies of different surfaces are obtained; sample scanning signals of different surfaces are determined according to the different sample resonance frequencies, and the sample scanning signals of different surfaces are stored; a second scanning signal is used to excite a weight and a flat plate of a target surface to collect a resonance frequency of the target surface; a target scanning signal corresponding to the resonance frequency is determined based on the resonance frequency of the target surface; and the target scanning signal is used to excite the weight and the flat plate of the target surface. The controllable source scanning method provided by the application can improve the accuracy of the signal received by the geophone.

The present disclosure provides a method and device for monitoring generation of coal mine vibration and its response to vibration wave, the device comprises a frame, a vibration triggering device, an surface building model, an surface monitoring system, and an underground monitoring system. The present disclosure can simulate the mechanical process and phenomenon of high-energy and strong vibrations triggered by the fracture of the high-level thick-hard rock layers.

The invention discloses a vibroseis excitation signal extraction method and device considering a near-surface coupling problem, electronic equipment and a medium. The method comprises the following steps: establishing a vibroseis coupling mass spring damping system which comprises a heavy hammer system, a floor system and a ground capturing system; the mass and acceleration of a heavy hammer and a bottom plate of the vibroseis vehicle are obtained respectively, and then coupling ground parameters are obtained; establishing a relational expression between the coupling ground speed and the coupling ground parameters according to the coupling mass spring damping system of the vibroseis; and calculating the coupling ground speed according to the sum of the weighted ground forces and the relational expression. According to the method, the coupling model of the bottom plate and the ground is incorporated into the mass spring damping system, and the newly constructed mass spring damping system is utilized to filter the reference scanning signal or the weighted sum ground force of the vibroseis, so that the vibroseis reference signal which is more in line with the actual input underground signal is obtained.

A data processing device 1 includes: a temperature identification unit 181 that identifies the seabed temperature at a position on a seabed where a measurement device is to be installed, the measurement device creating measurement data of seismic waves associated with an internal time at which the seismic waves were detected in response to vibration waves being emitted from a hypocenter; a temperature lowering unit 182 that sets the temperature of an oscillator 41 installed inside the measurement device present at a location other than in seawater to the seabed temperature; a rate measurement unit 183 that measures an aging rate, which is a rate of change over time in the frequency of the oscillator 41, in a state where the temperature of the oscillator 41 installed inside the measurement device present at the location other than in seawater has reached the identified seabed temperature; and a correction unit 188 that corrects the internal time associated with the measurement data on the basis of the aging rate after the measurement device installed on the seabed creates the measurement data.