54 results about "Detonation velocity" patented technology

The invention discloses a method for rapidly judging the sensitization effect of an on-site mixed emulsion explosive. The method comprises the following steps: S1, a laboratory calibration stage: simulating an on-site sensitization process to prepare a calibrated explosive sample; the sampling device collects and calibrates explosive samples, the millimeter graduated scale is arranged above the sampling device, and the camera shoots and counts the number of bubbles; detecting the density and the detonation velocity, and establishing an incidence relation of bubble number-density-detonation velocity in the specified millimeter scale and a qualified range; s2, an on-site detection stage: calibrating a millimeter graduated scale, camera equipment and a sampling device which are consistent in specification in a laboratory; the sampling device collects an on-site explosive sample, the graduated scale is arranged above the sampling device, the camera shoots and counts the number of bubbles, and the sensitization quality is judged by comparing with a laboratory calibration association relationship. According to the invention, the problems of long detection period of a traditional laboratory, strong subjectivity of existing field detection and high requirement on professional level of detection personnel can be solved, and real-time, accurate and low-cost detection of field sensitization quality is realized.

The invention relates to the technical field of blasting, and discloses a rock mass longitudinal wave velocity inversion method based on blast hole detonation velocity measurement, which comprises the following steps: drilling a blast hole; explosive and a monitoring probe of monitoring equipment are arranged in the blast hole; detonating the explosive, monitoring and outputting a curve chart that the propagation distance of the detonation wave changes along with the propagation time through monitoring equipment, the longitudinal coordinate of the curve chart being the propagation distance of the detonation wave, and the horizontal coordinate of the curve chart being the propagation time of the detonation wave; according to the distribution condition of each rock stratum in the blast hole, the curve graph is divided into a plurality of curve segments, and each curve segment corresponds to the propagation process of detonation waves in the corresponding rock stratum; the slope of each curve section is calculated, and actually measured explosive detonation velocities of different rock stratums are obtained; and substituting the actually measured explosive detonation velocity into the theoretical formula of the explosive detonation velocity and the longitudinal wave velocity of the rock, and inverting the longitudinal wave velocity of the corresponding rock stratum. Through the inversion method provided by the invention, detonation wave monitoring and longitudinal wave velocity inversion of different rock stratums through which the blast hole passes can be completed through one-time blasting.

The utility model discloses a device for detecting the detonation velocity of on-site mixed emulsion explosive in a blast hole, and particularly relates to the technical field of explosive detonation velocity detection, the device comprises a first positioning ring and a second positioning ring, the two positioning rings with semi-ring structures are hinged through a rotating roller hinge and can be accurately positioned around the blast hole, a stable foundation is provided for explosive detonation velocity detection, and the explosive detonation velocity detection efficiency is improved. The first positioning ring is provided with a needle inlet hole, the second positioning ring is provided with a needle outlet hole, the axes of the two holes coincide, the aperture ratio of the two holes is three to one, a clear penetrating path is provided for a steel needle, and the detection precision is improved. A plurality of guide plates are encircled to form a cylindrical structure, so that the steel needle can be guided and subjected to posture control from different directions, the steel needle is ensured to advance along the axis, the device can adapt to steel needles with different diameters, the universality of the device is improved, the device is simple to mount and operate, and the assembly for measuring the detonation velocity of the emulsion explosive can be quickly completed.

This invention discloses a research and testing method for detonation velocity tubes, comprising the following steps: Step 1, point setting; Step 2, point connection; Step 3, influence determination; Step 4, numerical judgment. This invention, by improving the data reading points of the detonation velocity tube and reducing the difference in the sampling test system, comprehensively verifies the detonation velocity test and uses two or more data points to cross-reference the validity of the detonation velocity value. If the data from two points far from the detonating bomb are significantly greater than the values ​​from two adjacent points, the first set of values ​​can be considered significantly affected by the detonating bomb, and this set of data is invalid. If the difference between the values ​​from the second and third sets of data points is less than 200 m / s, it can be considered a valid detonation velocity. If the difference between two adjacent sets of data is large, it can be considered that the explosive stability is insufficient. This method is beneficial for fundamentally solving the evaluation of explosive raw material performance and simultaneously reducing the significant error brought by the detonation velocity of the detonator to the detonation velocity measurement, effectively evaluating the performance and stability of explosives.

This application discloses a method for obtaining the detonation velocity and detonation pressure of energetic materials based on atomic-scale dynamics, relating to the field of materials science and technology. The method includes: acquiring an initial configuration file of the energetic material to be tested, and performing dynamic processing on the initial configuration file using a materials simulation model to generate a first training dataset; iteratively training the potential function using the first training dataset to obtain a structure file corresponding to each generation of training; sampling and screening the structure files, and calculating the accuracy adjustment parameters corresponding to the sampled and screened structure files using first-principles calculation software; adjusting the parameters of the materials simulation model using the accuracy adjustment parameters, and using the adjusted materials simulation model to generate a second training dataset from the structure files obtained from each generation of training and the first training dataset; and predicting the performance of the energetic material to be tested based on the potential function trained on the second training dataset. A general method for predicting material properties that balances accuracy and efficiency is proposed.

The application discloses on-site mixed emulsion explosive and application thereof in smooth blasting, and the on-site mixed emulsion explosive contains the following raw materials in parts by weight: 60-80 parts of ammonium nitrate, 5-10 parts of sodium nitrate, 12-18 parts of water, 6-7 parts of mixed oil phase, 0.4-0.9 parts of sensitizer, 0.2-0.5 parts of accelerator, 5-12 parts of calcium chloride and 4-8 parts of sodium sulfate; the method steps of the application of the on-site mixed emulsion explosive in the smooth blasting are as follows: S1, arrangement of auxiliary holes, slotting holes, caving holes and peripheral holes; S2, on-site filling of the on-site mixed emulsion explosive is sequentially carried out on the auxiliary holes, the slotting holes, the caving holes and the peripheral holes by an on-site mixing vehicle, and a blasting network is formed; and S3, blasting construction is carried out in a delay segmented detonation mode. In the on-site mixed emulsion explosive, the detonation velocity regulator is mixed more uniformly, more detonation gas can be generated, and the crack propagation effect of a blast hole is improved.

A munition has an explosive charge with direction explosive characteristics, such as a nonuniform detonation velocities. The explosive charge may have multiple portions of explosives with nonuniform characteristics, and / or may have portions with graded nonuniform characteristics. The explosive charge may be used to propel a material from the munition in a desired manner. For example the material may be fragments that are part of a fragmentation munition. Alternatively the material may be a layer of a material, such as a metal, that produces an explosively formed penetrator or shaped charge. The explosive charge may be configured to control the spread and / or direction of the material to be propelled from the munition.

The invention provides a method for determining the detonation speed of an explosive used for tunnel caving blasting by considering the influence of ground stress, and belongs to the technical field of blasting engineering and rock mass mechanics. Comprising the steps of obtaining rock mass mechanical parameters, blasting parameters and crustal stress data; establishing a stress analysis model based on ground stress and a blasting design drawing; establishing a crustal stress redistribution model caused by a cut cavity in the model, calculating radial pressure stress generated by crustal stress redistribution among the caving holes, and drawing a polar coordinate graph; establishing a collapse inter-hole explosion stress superposition model, and calculating circumferential tensile stress generated by explosion at the central points of the two holes; and based on the dynamic tensile strength and stress state of the rock, establishing a strength criterion for forming the inter-hole through crack, and deducing and solving the minimum explosive detonation speed required by the criterion. The blasting joint forming quality is effectively improved, back break is controlled, surrounding rock damage is reduced, and the safety, economical efficiency and reliability of blasting engineering are improved.

The invention discloses a stepped graded explosive filling method for roadway tunneling, which comprises the following steps: before blasting construction, according to the material parameter difference and the detonation velocity difference of adjacent charging sections in a stepped charging structure, measuring the reflection intensity and the energy transfer sequence of blast waves in blast holes one by one, and establishing an energy propagation trajectory diagram of each blast hole; and a boundary reflection response spectrogram is generated at the final position of the energy propagation trajectory. By constructing an energy propagation track and a coupling parameter scale chain and accurately regulating and controlling a charging structure and an energy release process, layered energy transfer and time sequence avoidance are realized, energy turn-back and advanced detonation are eliminated, vibration and overexcavation risks are remarkably reduced, the blasting efficiency, safety and construction controllability are improved, and a stable and adjustable energy balance closed loop is formed. According to the method, the tunneling crushing efficiency, the construction controllability and the field safety margin can be improved at the same time, and a quantifiable feedback basis is provided for closed-loop monitoring correction and engineering popularization.

The invention relates to a detonation velocity measurement system and method, in particular to a system and method for measuring the detonation velocity of an explosive through an energy-type demodulation femtosecond fiber grating, and solves the technical problem that an existing method is difficult to realize precise positioning of an explosion wave surface and long-distance detonation velocity measurement. The system comprises a broadband laser, a circulator, a sensing grating string, a photoelectric detector and a control unit, the control unit is used for controlling the broadband laser to emit an optical signal, the optical signal is transmitted to the input end of the sensing grating string through the first terminal and the second terminal of the circulator and enters the third terminal through the second terminal after being reflected by the sensing grating string, and the third terminal transmits the optical signal to the input end of the photoelectric detector; the photoelectric detector converts reflected optical signals into analog electric signals in real time and sends the analog electric signals to the control unit, and the control unit is used for processing the analog electric signals to obtain the explosive detonation velocity. According to the method, the error of the arrival time point of the explosive shock wave of the explosive can be controlled within 1%.

The invention discloses an inner salt type high-energy density insensitive explosive and a preparation method thereof, 9-amino-2, 6-dinitro-bis [1, 2, 4] triazolo [1, 3, 5] triazine, namely ZDTT, is prepared, and the ZDTT has the performance advantages of high energy density and insensitivity and also has the advantage of simple synthesis process; zDTT has a unique inner salt type condensed ring structure and is insoluble in water and conventional organic solvents. The ZDTT actual measurement density is 1.881 g.cm <-3 >, the detonation velocity is 8757 m.s <-1 >, the detonation pressure is 31.7 GPa, the initial thermal decomposition temperature is 330 DEG C, the impact sensitivity is larger than 40 J, the friction sensitivity is larger than 360 N, and the high-energy-density insensitive explosive has huge application potential in the field of high-energy-density insensitive explosives.

The application discloses a laser loading energetic material detonation velocity rapid prediction method and system, and belongs to the field of energetic material detonation performance detection. The application uses a pulse laser to interact with an energetic material to generate a shock wave, uses a single-point APD detector to record and store voltage changes of the APD, obtains an attenuation signal of the shock wave when the shock wave passes through a detection light beam, extracts interval time between a pulse signal and different height attenuation peaks from the energetic material surface, fits a time-position relationship through a corrected point explosion model, obtains corresponding shock wave characteristic velocity, establishes a linear regression relationship with a macroscopic detonation velocity, and realizes rapid prediction of the energetic material detonation velocity. The application only needs 5-10 mg of a sample, realizes extraction of the shock wave velocity of the energetic material through a single-point detector, obtains the shock wave characteristic velocity, linearly fits the shock wave velocity and a known detonation velocity, and predicts the energetic material detonation velocity. The application can improve the research and development efficiency of the energetic material and reduce the research and development cost.

The invention discloses a hardened rock pavement blasting method, which comprises the following steps of: constructing a digital twin model through geological radar and three-dimensional laser scanning, and rehearsing a blasting effect and generating an initial parameter by utilizing an AI (artificial intelligence) algorithm; precise blasting is realized by adopting a sectional charging structure, and blasting vibration and dust diffusion are effectively controlled in combination with a 5G-TSN intelligent detonating network and a magnetorheological fluid shock insulation groove. Meanwhile, degradable dust suppression capsules are pre-embedded to suppress dust, modified emulsion explosives are adopted to reduce the detonation velocity, data are fed back to an AI system through three-dimensional point cloud scanning to be optimized, and the detonation efficiency and safety are improved.

The present invention discloses a method for preparing a CoCrNi medium entropy alloy and Q235B steel explosively welded composite plate. The CoCrNi medium entropy alloy plate is annealed, and then sand, anvil, Q235B hot-rolled steel plate, support column, medium entropy alloy plate, kraft paper, and explosive are laid in sequence from bottom to top on the explosion field. Then, the explosive is explosively welded to obtain a CoCrNi medium entropy alloy and Q235B steel explosively welded composite plate. The explosive has a detonation velocity of 2500-3000 m / s and a velocities of 18-22 mm. The present invention achieves metallurgical bonding of the CoCrNi medium entropy alloy and the Q235B steel plate. The resulting composite plate has an interface bonding rate greater than 99.2%, a yield strength greater than 420 MPa, a tensile strength greater than 500 MPa, an elongation after fracture greater than 35%, and an interface shear strength greater than 200 MPa. The present invention has a simple process and is suitable for industrial production.

The application discloses a production method of an explosion-welded super-long chromium-molybdenum-vanadium hydrogen-resistant steel 12Cr2Mo1VR metal composite plate, which comprises the following steps: plate processing, plate arrangement, combined explosive frame arrangement, explosive and electronic detonator arrangement, plate withdrawal and explosion welding. According to the explosion welding explosive detonation wave movement law, different explosive detonation velocities are configured, the explosive arrangement mode is changed, the explosive detonation wave breakthrough phenomenon on the plate surface is eliminated, and the length limitation problem of the explosion-welded composite plate is effectively solved.

The application provides a TNBA cast explosive and a preparation method thereof, and belongs to the technical field of cast explosive preparation. The TNBA cast explosive is prepared according to the mass percentage of 50.6-55.2% of a liquid carrier, 4.4-4.8% of a fluxing agent and 40-45% of a solid filler. The TNBA cast explosive prepared by the application has the following advantages: the liquid carrier and the fluxing agent have high density, low volatility, low toxicity, low sensitivity and good formability, and no shrinkage hole and crack after pouring; the solid filler has the characteristics of high energy, low sensitivity, high density and high explosion heat; the raw material cost is low, the preparation process is simple, and the explosive can be produced on a large scale; compared with the existing explosives, the cast explosive has high oxygen balance, can generate more heat, has high density, detonation velocity, explosion heat and explosion pressure, and low impact sensitivity, and has higher performance than ordinary explosives.

The invention discloses an equivalent amplification-based underwater columnar charge numerical simulation method, which comprises the following steps of: selecting a small-diameter high-detonation-velocity explosive underwater columnar charge, and drawing an underwater shock wave P-v curve and a sparse wave P-v curve in an explosive product; obtaining a relational expression of the shock wave array surface particle velocity vx and the shock wave array surface pressure Px of the explosive-water interface through an intersection point of the two curves, and calculating a shock wave peak value of a cylindrical shock wave in water at a certain point to equivalently amplify the underwater columnar charge of the small-diameter high-detonation-velocity explosive into the large-diameter low-detonation-velocity columnar charge. And solving the detonation velocity D3 and the density rho3 of the large-diameter low-detonation-velocity columnar charge, and establishing an explosive detonation state equation so as to simulate the detonation state of the underwater columnar charge explosive. According to the method, the explosion state can be well described, the modeling effect is good, deformed grids are not generated, the calculation time can be greatly shortened, and the storage memory is saved.

The invention relates to a preparation method of a magnesium hydride powder emulsion explosive, and belongs to the technical field of emulsion explosives. The preparation method of the magnesium hydride powder emulsion explosive comprises the following steps: heating and mixing ammonium nitrate, sodium nitrate and deionized water to obtain a water-phase substance; and stirring and mixing the paraffin, the emulsifier and the assistant to obtain an oil-phase substance, putting the oil-phase substance into an emulsifying machine, slowly adding the water-phase substance for emulsifying, and slowly adding the high-energy sensitizer under a stirring condition to continuously stir to obtain the high-energy sensitizer. According to the prepared high-energy sensitizer, the energy density and the release efficiency are improved through synergism of all the components, the energy output strength during emulsion explosive explosion is enhanced, and the brisance is remarkably improved; the constructed efficient energy transfer network accelerates detonation wave propagation, energy loss can be effectively reduced, and the detonation velocity can be effectively improved.

The invention provides a method for predicting the thickness of a chemical reaction area of a composite explosive based on a machine learning model, and the method employs the machine learning model, and the input data of the machine learning model comprises the composition of a composite explosive formula, the charge density and the CJ detonation velocity; the output result of the machine learning model comprises the thickness of the chemical reaction area of the composite explosive. The machine learning model adopts a random forest model. The model parameters of the random forest model comprise the number of decision trees, the maximum feature number, the maximum depth of the decision trees and the minimum leaf node sample number. The machine learning model construction method is distinct in hierarchy and clear in process, can accurately predict the thicknesses of chemical reaction areas of various mixed explosives, and has wide applicability. The machine learning model involved in the invention is constructed based on a random forest model, shows good prediction performance and over-fitting resistance, has good noise immunity, and is insensitive to missing values of sample data.

The application discloses a high-energy heat-resistant energetic complex Li-ZDPT and a preparation method thereof. A novel high-energy heat-resistant explosive preparation method with simple preparation process, mild reaction condition and high yield is developed by taking 3,5-diamino-4-nitro pyrazole as a starting material, and a high-energy heat-resistant explosive Li-ZDPT with novel structure and excellent comprehensive performance is prepared. In addition to the characteristics of high energy and high heat stability, the Li-ZDPT also has the advantages of simple preparation method and high yield. The thermal decomposition temperature of the Li-ZDPT is as high as 436 DEG C, the theoretical detonation velocity is 8096 m / s ‑1 , the actual measured impact sensitivity is greater than 40 J, and the friction sensitivity is greater than 360 N. The excellent comprehensive performance of the Li-ZDPT makes it have great application potential in the field of high-energy heat-resistant explosives.

The application discloses a numerical simulation method and system for liquid oxygen rock breaking, and the numerical simulation method comprises the following steps: continuously measuring the detonation velocity and the blast pressure load of an energy storage tube on a liquid oxygen rock breaking site, obtaining the measured detonation velocity and the measured blast pressure load, and extracting key parameters from the measured blast pressure load; fitting an equivalent load curve by using a set mathematical model based on the key parameters; establishing a liquid oxygen rock breaking simulation model in a numerical simulation software; applying the equivalent load curve as input to the outer wall of the simulation energy storage tube, performing dynamic calculation to simulate rock blasting in a liquid oxygen environment, so as to obtain the liquid oxygen rock breaking effect and obtain a simulated detonation velocity; judging whether the equivalent load curve and the liquid oxygen rock breaking simulation model are reliable according to the simulated detonation velocity and the measured detonation velocity, and correcting the equivalent load curve or the liquid oxygen rock breaking simulation model if not. The application can solve the technical problems of numerical simulation difficulty and inaccurate prediction in the liquid oxygen rock breaking technology.

The utility model discloses an on-site mixed loading explosive detonation velocity measuring device which comprises a testing site, a testing hole is manually dug in the testing site, an installation plate is fixedly installed on the testing site through bolts, the installation plate corresponds to the testing hole in position, a fixing block is fixedly installed in the middle of the interior of the installation plate, and the fixing block is fixedly connected with the testing hole through bolts. And a detection sensor used for detecting the detonation velocity of the explosive is fixedly installed on the lower surface of the fixing block, an explosive charging barrel is arranged in the testing hole, and the explosive charging barrel is filled with gunpowder. According to the onsite mixed loading explosive detonation velocity measuring device, novel structural design is adopted, gunpowder is loaded into the explosive loading barrel, then the explosive loading barrel is placed into the testing hole, in the process, the connecting plate is extruded through the elastic effect of the connecting reed, so that the connecting plate is opened towards the left side and the right side, and the extruding roller at the top end of the connecting plate is used for extruding the inner wall of the testing hole to fix the explosive loading barrel; therefore, the medicine loading cylinder is fixed at a certain designated position in the test hole.

The application provides a kind of explosive performance simulation design method based on energy, safety and process, comprising: step one, the simulation model between the chemical composition of explosive formula and detonation velocity is established, that is, the energy performance simulation model of explosive formula;Step two, the simulation model between the sensitizing chemical group contained in explosive formula and impact sensitivity is established, that is, the safety performance simulation model of explosive formula;Step three, the simulation model between the average particle size of raw material in explosive formula and dynamic viscosity is established, that is, the process performance simulation model of explosive formula;Step four, on the basis of step one, step two and step three, the comprehensive performance characterization parameter is taken as the comprehensive processing result of explosive detonation velocity, explosive impact sensitivity and explosive dynamic viscosity, and the comprehensive performance simulation model of explosive formula is established.The simulation model construction method involved in the application has clear and distinct levels, the comprehensive performance characterization parameter is formed by linear weighting of detonation velocity, impact sensitivity and dynamic viscosity, so that the comprehensive performance of a group of explosive formulas with different component contents is analyzed and compared, and has a wide range of application.

The invention discloses a detonating positioning device suitable for pipe / pipe rod explosive cladding. The detonating positioning device comprises a detonating top cover and a positioning base. The detonating top cover is composed of three structural components including an outer charging guide cover, an energetic grain and an embedded charging platform, stable transition from top point detonating to bottom surface detonating is achieved through the geometrical characteristics of a funnel-shaped charging structure, and then uniform and synchronous detonating of annular charging is achieved. Furthermore, the difference of propagation paths is compensated by separately filling detonating explosives with different detonation velocities, so that the simultaneous detonation of the inner and outer main charges is realized. On the basis, the common problems that in the prior art, annular charge detonation synchronism is insufficient, and inner charge detonation and outer charge detonation are not matched can be solved. And the positioning base is provided with the positioning convex ring which is strictly matched with the size of the pipe part, so that the pipe can be fixed to keep a stable composite posture. On the basis, the detonation function and the positioning function are organically integrated through the integrated design, and the operation difficulty and the process cost are remarkably reduced.

The invention relates to the technical field of detonation velocity prediction, in particular to an emulsion explosive thermal aging detonation velocity decay prediction method, which comprises the following steps: acquiring boundary conditions of emulsion explosive thermal aging, acquiring detonation velocity characteristic parameters corresponding to the boundary conditions based on the value range of each boundary condition, and constructing a detonation velocity correlation model; determining a currently processed association entity from the detonation velocity association model, and acquiring at least one group of association parameters from the detonation velocity association model according to a combination relationship of the association entity; under the conditions of temperature and sensitizer types, according to the difference of heating time and detonation velocity, the associated parameters are fitted into a detonation velocity attenuation curve, and the variation trend of the detonation velocity attenuation curve is determined based on the value range of the attenuation rate of the detonation velocity attenuation curve; based on the change trend of the detonation velocity attenuation curve, selecting temperature nodes in the detonation velocity attenuation curve, and triggering data configuration early warning according to the deviation proportion under each temperature node; the accuracy and efficiency of detonation velocity attenuation prediction are realized.

The invention belongs to the field of material safety testing, and discloses a comprehensive testing system for judging energetic material mixed liquid pipeline explosion propagation, which comprises a testing module, a detonation velocity measuring module, an overpressure measuring module, a video monitoring module, a synchronous triggering module and a data acquisition module, and is characterized in that the testing module comprises a testing pipe, a plastic plug and an initiating explosive column; the detonation velocity measurement module comprises a detonation velocity sensor; the overpressure measurement module comprises a shock wave overpressure sensor; the video monitoring module comprises an anti-explosion shelter and a high-speed camera; the synchronous trigger module comprises a metal target wire and a trigger body, and the metal target wire is wound on the initiating explosive column; the data acquisition module comprises a data acquisition instrument, and the detonation velocity sensor, the shock wave overpressure sensor, the high-speed camera and the trigger body are all connected to the data acquisition instrument. The explosion velocity, overpressure and image measurement modules are integrated, multi-parameter synchronous acquisition and cooperative comparison of explosion shock wave velocity, external overpressure and real-time images are realized, and the credibility of a judgment result is high.

The present application relates to the technical field of detonation velocity prediction, in particular to an emulsion explosive thermal aging detonation velocity attenuation prediction method, comprising: obtaining the boundary conditions of emulsion explosive thermal aging, obtaining the corresponding detonation velocity characteristic parameters under the boundary conditions based on the value range of each boundary condition, and constructing a detonation velocity correlation model; determining the current processing correlation entity from the detonation velocity correlation model, and obtaining at least one set of correlation parameters from the detonation velocity correlation model according to the combination relationship of the correlation entity; fitting the correlation parameters into a detonation velocity attenuation curve according to the different heating time and detonation velocity with temperature and sensitizer type as conditions, determining the change trend of the detonation velocity attenuation curve based on the value range of the attenuation rate of the detonation velocity attenuation curve; selecting the temperature nodes in the detonation velocity attenuation curve based on the change trend of the detonation velocity attenuation curve, triggering data configuration warning according to the deviation proportion under each temperature node; and realizing the accuracy and efficiency of detonation velocity attenuation prediction.

The present invention discloses a detonation velocity regulation and control method and system for gas explosion compositions, relating to the technical field of regulation and control. The method comprises: obtaining multiple experimental cycles, obtaining reference detonation wave arrival times, and forming a reference arrival time sequence; obtaining a stability index, and if the stability index exceeds a preset threshold, obtaining a theoretical detonation wave arrival time at a detection location and obtaining a reference average correction value; obtaining a target detonation velocity, and obtaining a target detonation wave arrival time at a detection location based on the target detonation velocity, and obtaining a target combined pressure based on the target detonation wave arrival time and the reference average correction value; conducting an experiment at the target combined pressure in the current experimental cycle, and obtaining the current detonation wave arrival time at the detection location in the current experimental cycle; obtaining a current detonation velocity based on the current detonation wave arrival time, and obtaining a regulation strategy based on the target detonation velocity and the current detonation velocity. The present invention has the advantages of precise regulation and control, reliable correction value determination, and dynamic environmental adaptation.

The invention discloses a coupling charging explosive numerical simulation method based on equivalent amplification, which comprises the following steps: selecting a small-diameter high-detonation-velocity explosive charge for coupling charging, and calculating average detonation pressure P1; determining initial pressure Pm of a rock interface according to an acoustic approximation theory; calculating the radial peak stress sigmar at the position r away from the axis of the blast hole; equivalently amplifying to charge the large-diameter low-detonation-velocity explosive charge in a coupling manner, and solving the detonation velocity v2, namely the detonation velocity of the large-diameter low-detonation-velocity explosive when the stress value at the position r away from the axis of the blast hole in the rock reaches sigma r after the large-diameter low-detonation-velocity explosive charge is exploded; and establishing an explosive detonation state equation to simulate the detonation state of the coupling charge explosive. According to the method, a corresponding explosive detonation state equation is established after equivalent amplification according to the rule that the total energy released during coupling charge explosion of the small-diameter high-detonation-velocity explosive charge and the total energy released during explosion of the large-diameter low-detonation-velocity explosive charge are equal, so that the explosion state is well described, the modeling effect is good, and the method is easy to implement. Calculation time can be greatly reduced, and storage memory can be saved.

The utility model is applicable to the technical field of production of metal composite plates, in particular to an explosive welding structure of an ultra-large-area titanium-steel composite plate, which comprises a steel base plate, a plurality of support blocks are arranged on the surface of the steel base plate, and one ends of the plurality of support blocks are jointly connected with a titanium composite plate. According to the utility model, the explosive with low detonation velocity is creatively used as an energy source, and the detonation velocity of the explosive is further reduced to about 1600m / s at the welding end part, so that the exhaust time between the metal plates in the explosion process is effectively prolonged, the amplitude of corrugations on the bonding surface is reduced, and a smoother interface waveform with smaller corrugations is obtained. According to the optimized design, when the titanium-steel composite plate is produced, the quality of a product and the flatness of a joint surface can be remarkably improved, the welding defect caused by unsmooth exhaust or overlarge corrugation in a traditional process is avoided, and especially in the welding process of the titanium-steel composite plate with an ultra-large area specification, the welding quality of the titanium-steel composite plate is greatly improved. And challenges caused by a large-area joint surface can be effectively handled.