920 results about "Detonation" patented technology

Some implementations include a perforating gun configured for transport with an internal detonator, the perforating gun to be used in a wellbore proximate to one or more subsurface formations, the perforating gun comprising: a detonator assembly positioned proximate to a ballistic initiator end of the perforating gun, wherein the detonator assembly includes the detonator; and a detonation cord positioned proximate to a receiver end of the perforating gun, wherein the ballistic initiator end is on an opposing side of the perforating gun from the receiver end; and an isolation cask disposed at the ballistic initiator end of the perforating gun, wherein the detonator assembly is recessed within the isolation cask.

Some implementations include an apparatus comprising an explosive material configured to detonate; a liner in contact with the explosive material, the liner configured to, after detonation of the explosive material, form jets to perforate a tubular disposed in a subsurface borehole; a reactive material configured to release energy in response to detonation of the explosive material; and a case in contact with a portion of the reactive material and configured to surround the explosive material, the liner, and the reactive material.

The invention discloses an evaluation and improvement method and device for a tunnel blasting effect and a medium, and relates to the technical field of tunnel engineering.The evaluation and improvement method comprises the steps that a tunnel coupling data set is collected, space registration and three-dimensional shape reconstruction are conducted, fracture space distribution is formed, risk probability mapping is conducted on the fracture space distribution, and a fracture risk thermodynamic diagram is output; the fracture risk thermodynamic diagram and tunnel rock mass data are input into a digital twin blasting model, a load mapping layer carries out load gradient distribution, a rock mass response deduction layer carries out stress wave propagation simulation and damage accumulation quantification, an optimized blasting number instruction set is generated, and a drill jumbo is driven to execute blasting operation and vibration monitoring according to the optimized blasting instruction set. And actual blasting effect parameters are obtained. According to the method, accurate simulation of geological conditions and optimal adjustment of blasting parameters are realized through the digital twin blasting model, and meanwhile, refined and interpretable evaluation of the blasting effect is realized through vibration monitoring and error propagation modeling of the actual blasting effect.

The invention discloses a simulation method for evaluating damage of a concrete gravity dam under the action of an explosion load. The simulation method comprises the following steps: establishing geometric models of the concrete gravity dam, water and explosives, performing grid division on the geometric models, and dispersing units into particles to obtain a discretization model; giving material parameters, boundary conditions and contact to the discretization model, and setting a detonation point position and a detonation mode; coupling effects between the explosive and water, between the water and the concrete gravity dam and between the explosive and the concrete gravity dam are set; key information is initialized; a fluid-structure interaction force is calculated by adopting an asynchronous solution IHPD-SPH coupling method; an SPH solver is adopted to update the speed and density information of the fluid; an IHPD solver is adopted to update internal force and acceleration information of the solid; checking whether the calculation duration is met or not, and if yes, ending calculation; if not, recalculating the fluid-solid coupling force according to the currently obtained particle state; and obtaining a dam damage result, and performing damage grade evaluation.

The invention belongs to the field of gas explosion test technology development, and relates to a reinforced full-size residential building structure gas leakage explosion multi-parameter test platform and method, which can be used for simulating the whole process of a gas leakage explosion accident in a real residential building scene. The gas leakage explosion evolution mechanism and disaster-causing consequence research under multiple ignition sources, multiple gas types, multiple pressure relief conditions and multiple obstacle environments can be realized. The test platform can simulate a resident house type, and through local reinforcement design and coupling test technology development of the test platform, a high detonation pressure, high simulation and multi-parameter gas explosion repeated test is realized.

The invention discloses an anti-radiation aluminum-based layered composite board and an explosive welding method thereof, and belongs to the technical field of metal material welding. According to the method, aluminum or aluminum alloy serves as a base plate, tantalum or tantalum alloy serves as a compound plate, a titanium / titanium alloy middle transition layer is introduced, direct impact of explosive detonation on the compound plate is avoided through an aluminum protection plate, a powdery emulsion explosive is combined with an inert diluent to regulate and control energy parameters, and gaps between plates are accurately set based on the explosive welding window theory; and one-time forming metallurgical bonding of multiple layers of heterogeneous materials is achieved. The density of the obtained composite board is reduced by 40% compared with that of a traditional lead protection layer, and the composite board has the characteristics of radiation resistance, light weight, high strength and corrosion resistance and is suitable for manufacturing of spacecraft radiation protection layers and other deep space equipment.

The invention relates to an anti-explosion high-temperature-resistant explosion test pipeline design method based on finite element simulation, and belongs to the field of pipeline design and application. According to the method, mechanical and heat transfer behaviors of the pipeline under the combined action of high temperature and explosive shock waves are analyzed by simulating extreme working conditions such as explosion, fire blast and detonation, and the safety performance of the pipeline is improved. The method comprises the following specific steps: firstly, setting explosion working condition parameters based on test requirements and related standards; secondly, establishing a three-dimensional finite element model, and performing fluid dynamic simulation analysis; then, through thermodynamics and explosion impact data analysis, temperature, pressure and stress distribution is obtained, and design parameters such as the geometric structure, the material and the wall thickness of the pipeline are optimized; and finally, verifying the safety and the stability through experiments. The method improves the design efficiency and reliability, and is suitable for high-risk experiment environments such as petrochemical engineering and mines.

The invention belongs to the field of computational explosion mechanics, and particularly relates to a rapid calculation method for a shock wave and detonation wave propagation process in a non-uniform medium, and the rapid calculation method comprises the following steps: 1, initializing a calculation program; step 2, estimating and calculating step length in each time step; step 3, carrying out integration on the ordinary differential equation by adopting an explicit three-order TVD Runge-Kutta format; 4, solving a Mach number through an A-M relation; 5, data correction is carried out, wherein the data correction comprises regularization and smoothing processing of grids; and step 6, checking whether termination time is reached or not, if so, ending all processes to complete operation, and if not, returning to the step 2 to continue to circularly solve. According to the rapid calculation method, rapid numerical calculation of propagation of shock waves and detonation waves in a non-uniform medium is achieved, wherein the phenomena comprise refraction, transmission, Mach reflection and the like.

The invention discloses a device and a method for testing initial velocity and distribution of fragments of a warhead, and the device is characterized in that a missile rack is arranged in a light filtering protection device, and is used for fixedly installing the warhead; the light filtering protection device is arranged between the high-speed camera laying room and the anti-reflection background, located on one side of the lens axis of the high-speed camera and used for enabling fragments generated by warhead explosion to penetrate through the space between the high-speed camera laying room and the anti-reflection background to shield explosion fire light and detonation products. The phenomenon that the lens of the high-speed camera is covered in the light curtain area of the explosion flame to cause overexposure is avoided, so that fragment flying images can be shot at a short distance. According to the testing device, explosion fire light is weakened through the light filtering protection device, the concentration of detonation products flying along with fragments is reduced, and therefore the fragment scattering process can be shot at a short distance, axial distribution of the initial speed of the fragments is directly calculated, and the fragment scattering angle is obtained.

The invention provides a blasting control method for simultaneously creating a free surface in advance by front-row holes in a slag pressing blasting area, which comprises the following steps of: arranging front-row blast holes and rear-row blast holes: arranging the front-row holes in the slag pressing area along a free surface direction, arranging rear-row holes in a main blasting area, and arranging according to a preset hole distance, a preset row distance, a preset hole depth and a preset charging coefficient; the front-row holes are set to be at the same detonation moment, so that synchronous detonation of the front-row holes earlier than that of the rear-row holes is achieved, the same multi-section charging is conducted in the blast holes of the front-row holes, and multi-section detonator detonation can be conducted in the same high-frequency millisecond detonation mode; setting delayed detonation of the rear row holes: setting the detonation moment of the rear row holes to be 10-20ms after the last section of detonation moment of the adjacent front row holes; and detonating implementation: detonating control is carried out by adopting a blasting network established by digital electronic detonators. According to the method, a continuous and stable free surface can be formed in the slag pressing blasting area, the crushing effect of follow-up blasting is improved, and the boulder yield is reduced.

The invention discloses a new energy automobile battery puncture fire extinguishing device which comprises a supporting frame, a push rod and a compressed fire extinguishing agent storage tank, and one side of the supporting frame is hinged to or fixedly connected with the push rod; an explosive puncture assembly is installed on the supporting frame, a flow channel communicated with the tip end of a nail penetrating head and a conveying pipe is arranged in the nail penetrating head, and an inlet of the conveying pipe is connected with a compressed fire extinguishing agent storage tank. The device has the advantages that the device is simple and light in structure, explosive armor penetrating is adopted, a fire extinguishing agent can be directly injected into a battery pack for extinguishing fire, clumsy armor penetrating design such as a drilling machine is avoided, stability is high, and the device is more reliable; the explosion-proof device is simple in structure and convenient to use, the explosion-proof device only needs to maintain normal operation before explosion (the explosion-proof device can be pressurized and exploded after extending into the bottom of the battery, and flame cannot influence the explosion in several seconds), pressure linkage is utilized, manual operation of an external control line is not needed, and the stability is greatly improved.

Safe addressable firing controls positioned within a reusable housing that only allows voltage and current from the shooting panel to reach the explosive device by addressing the switch to open allowing electricity to pass through it and setting off the chain reaction during detonation, wherein the safe addressable firing controls positioned within a cartridge that creates a safety barrier between the surface equipment and a downhole tool, such as an explosive device.

The invention relates to a process for preparing a gradient hardening metal plate through explosion hardening, and belongs to the technical field of explosion hardening and gradient hardening materials. In order to ensure the experiment safety, a test site is selected as a static explosion site, a rigid base, a metal plate to be subjected to gradient hardening and a poured high-detonation-velocity plate-shaped explosive are sequentially placed in the site from bottom to top, then the explosive is started by an electric detonator to carry out high-pressure and high-frequency impact hardening treatment on the metal plate, and finally the metal plate subjected to gradient hardening is obtained. The surface hardness is improved to 380-400 HV, and the depth of a hardened layer reaches 15 mm. The process is simple to operate, efficient, convenient and obvious in effect, and does not need large equipment and instruments.

The invention discloses a delay explosion propagation device for multi-stage perforation detonation, relates to the technical field of multi-stage perforation, and aims at solving the technical problem that an existing delay explosion propagation device is insufficient in safety isolation in the delay waiting stage. The delay explosion propagation device comprises a gun body, a pressure sensor, a perforating bullet system, a detonation system and an isolation mechanism; the detonating system comprises an inner barrel connected into the gun body in a sleeved mode, a firing pin arranged in the inner barrel in a sleeved mode and provided with hydraulic drive, and a fire cap installed at the bottom of the inner barrel. Through gathering and unfolding of the combination blocks in the isolation mechanism, reliable separation and connection of the impact path of the firing pin are achieved, the firing pin can directly impact the fire cap to complete detonation only when the combination blocks are unfolded, the impact path is separated and cannot be detonated when the combination blocks are gathered, and therefore an active controllable mechanical safety isolation means is provided; the technical problems that an existing delay explosion propagation device is detonated in advance due to the fact that a firing pin accidentally impacts a fire cap due to false triggering or pressure fluctuation in the delay waiting period, and safety is insufficient are solved.

The invention discloses a big data-based mine blasting process control optimization method and system, and relates to the technical field of mine blasting. Constructing a three-dimensional twinborn model of the mine, obtaining a plurality of blasting points and effective blasting areas thereof, obtaining drilling lithology information and effective blasting areas of the blasting points, constructing a charge evaluation model in combination with historical blasting parameters, and obtaining expected charge by utilizing the charge evaluation model in combination with first blasting parameters; the broken stone throwing duration of each effective blasting area is obtained, a detonation evaluation model is constructed in combination with the drilling lithology information and the historical blasting parameters, the detonation evaluation model is used for obtaining the expected detonation time difference in combination with the second blasting parameters, and recommended blasting parameters are generated according to the expected explosive loading amount and the expected detonation time difference and fed back; the corresponding expected explosive loading amount can be output according to the expected blasting area, and the explosive loading efficiency of mine blasting operation and the overall blasting effect are improved.

The invention relates to the technical field of arc shaped energy-gathered blasting parameter design, and provides an arc shaped energy-gathered blasting parameter design method under a complex crustal stress condition, which comprises the following steps: establishing a double-hole blasting three-dimensional model comprising a rock mass, an arc explosive, an energy-gathered pipe and coupled air, applying a crustal stress boundary condition and carrying out stress initialization; setting material model parameters based on the test data; performing fluid-structure interaction dynamic response numerical simulation on the model by adopting LS-DYNA to obtain stress and strain response caused by blasting; and establishing evaluation indexes based on tensile stress, compressive stress and through crack formation, carrying out sensitivity analysis and optimization adjustment on key blasting parameters such as blast hole spacing, delayed detonation time, explosive loading amount and coupling coefficient, and finally determining an optimal blasting parameter combination in different stress states. The method can effectively meet the blasting operation requirement under the complex ground stress condition, the presplitting quality and the rock mass stability are remarkably improved, and the method has wide engineering application prospects.

An emergency door release device for a vehicle may include a first sensor to detect a collision and provide a collision indication. A door sensor may detect if a door remains closed after the collision and provide a door indication. A receiver may receive a secondary detonation trigger indication from another device. A processor may analyze the indications to determine if they meet time constraints. A detonator may cause detonation of an explosive to separate the door from the vehicle body if the constraints are met. The device may include additional sensors to detect unsafe conditions. A method and system for releasing a vehicle door using similar components and steps may also be provided.

The present disclosure is directed to a rotating detonation combustor that includes a forward wall, a radially inner wall, and a radially outer wall. The forward wall is disposed at an inlet end of the rotating detonation combustor. The radially inner wall surrounds a longitudinal axis and extends downstream from the forward wall to an outlet end of the rotating detonation combustor. The radially outer wall extends downstream from the forward wall to the outlet end and surrounds the radially inner wall to define at least one annular plenum between the radially inner wall and the radially outer wall. At least one partition is proximate to the inlet end and defines at least two mixing zones. A plurality of oxidizer inlets and a plurality of fuel inlets are disposed at the inlet end in fluid communication with the at least two mixing zones.

The invention relates to an ultra-deep well perforation test combined operation tubular column safety evaluation method. The method comprises the following steps that S1, a packer lower portion perforation detonation annulus pressure evolution finite element model and a dynamic negative pressure evolution numerical model after perforation detonation are established; s2, establishing a perforation instant tubular column coupling impact vibration evolution model, and determining main control factors; s3, establishing a dynamic evolution numerical model of the shock absorber at the moment of perforation, and obtaining a dynamic evolution model of the lower oil pipe of the packer, the shock absorber and the perforating gun at the moment of perforation; and S4, evaluating the safety of the pipe column at the lower part of the packer by taking the Mises yield criterion as an evaluation standard. The influence of perforation detonation transient wellbore pressure and dynamic negative pressure on a lower tubular column system of the packer is fully considered, the dynamic response rule of the tubular column is disclosed through numerical simulation and theoretical analysis, risk control measures are put forward, and the safety of the packer is improved. Theoretical basis and technical support are provided for optimal design of an ultra-deep well perforation test combined operation scheme and safety of an oil testing process.

The invention discloses a rock blasting load transfer and throwing simulation method which comprises the following steps: S1, acquiring field parameters of a target blasting project, the field parameters comprising rock mass mechanical parameters, explosive parameters, blast hole parameters and charging structure parameters; and S2, based on the field parameters, constructing a three-dimensional explosive-rock calculation model by adopting pretreatment software, dividing grids, importing the grids into finite element software, setting a material model, a state equation and boundary conditions, and simulating an explosive detonation process. The limitation of a single numerical value method is solved; quantitative analysis and accurate prediction of rock blasting lumpiness are achieved, inclined joints are adopted in the discretization process, actual rock mass joint distribution is better fitted, and the reliability of a simulation result is improved; bulk rocks and excessive crushing phenomena are effectively reduced, the explosion energy utilization rate is improved, the engineering cost is reduced, and a scientific basis is provided for explosion design of projects such as mining and water conservancy and hydropower.

The invention discloses a post-combustion effect simulation method introducing chemical reaction analysis. The post-combustion effect simulation method comprises the steps that detonation energy, detonation products, mass fraction and related thermodynamic parameters are obtained according to the detonation process of explosives; obtaining an energy release parameter containing a chemical reaction source item; establishing a combustion analysis and calculation model introduced with a chemical reaction source item after the explosion of the closed space; solving the initial temperature and initial pressure of the equivalent gas mass of the explosive; inputting related parameters into a combustion analysis and calculation model after explosion in a closed space in which chemical reaction is introduced, and solving to obtain an energy release rate; and the specific heat energy of the post-combustion effect is obtained through calculation, the JWL state equation is modified, and the implosion response of the closed space considering the post-combustion effect is simulated. The method has the advantages that the calculation model including the chemical reaction source item is introduced, the explosive initiation process can be accurately and effectively simulated, the post-combustion reaction starting and ending time and the energy release rate are obtained, and the simulation result is accurate.

The invention provides a method for preparing a honeycomb sandwich structure based on laser collaborative explosive welding, and belongs to the technical field of explosive welding. The method comprises the following steps: carrying out laser pretreatment on the surface of a honeycomb core to form a periodically distributed micron-sized pit array; submicron-order holes are constructed in the micron-order pit array based on a nanoimprint lithography method; covering the surface of the plane material with an energetic material layer, and carrying out explosive welding on the plane material and the pretreated honeycomb core by utilizing shock waves generated after the energetic material layer is detonated to obtain a honeycomb sandwich structure; the laser pretreatment adopts femtosecond laser treatment, the power density is 106W / cm < 2 >-107W / cm < 2 >, the pulse width is 100fs-500fs, and the distance between scanning paths is 10mu m-50mu m. According to the method, a metallurgical bonding layer and a residual compressive stress field are formed on the connection interface of the honeycomb core and the plane material through the synergistic effect of laser pretreatment, nanoimprint and explosive welding, crack propagation is inhibited, the fatigue life of a joint is prolonged, and thermal damage is reduced.

The invention discloses an aqueous medium interval charging and detonation control method for improving strip mine blasting efficiency, which comprises the following steps: S1, according to strip mine rock properties and blasting requirements, determining blast hole parameters, and adopting an aqueous medium as an axial interval medium to carry out axial non-coupling charging to form a specific aqueous medium interval charging structure; s2, through a field test, an aqueous medium interval charging structure blasting test is carried out under different unit consumptions, and the optimal unit consumption of strip mine aqueous medium interval charging structure blasting is determined; s3, a hole-by-hole delay detonation method is adopted, precise delay detonation is achieved in combination with a digital electronic detonator, and reasonable delay detonation time is calculated according to the rock blasting and crushing principle; and S4, monitoring a blasting vibration signal by using a blasting vibration meter on a blasting site, and adjusting blasting parameters in real time according to a monitoring result. The method has the effects of improving the blasting crushing effect, reducing the explosive unit consumption, reducing the blasting harmful effect and improving the mining efficiency.

The invention provides a tunnel ventilation system control method and system based on artificial intelligence, and relates to the technical field of artificial intelligence. The method comprises the following steps: firstly, determining blast hole position distribution, blast hole size, blast hole detonation sequence and a rock stratum structure of a tunnel face on the basis of tunnel face image information; secondly, generating a tunnel face characteristic spectrum based on blast hole position distribution, blast hole sizes, a blast hole detonating sequence, a rock stratum structure of the tunnel face and the quantity of the explosive arranged in each blast hole on the tunnel face; then, inputting the tunnel face characteristic spectrum into a pre-trained blasting dust prediction model, and outputting the dust amount generated by tunnel face blasting by the blasting dust prediction model; and finally, the fan is controlled to work at the target output power based on the dust amount generated by tunnel face blasting. According to the scheme, the discharging time of dust generated by blasting can be accurately controlled, constructors are prevented from waiting for entering a site for a long time, and the tunnel construction efficiency is improved.

The invention discloses a cutting-free-surface-free blasting device for a complex ore body and a mining method, and relates to the technical field of blasting engineering and mining. The invention provides a blasting device and a mining method using the same in order to solve the problem that a preset free surface is difficult to form on an ore body in complex geology. The blasting device comprises shaped charge units of a specific structure or combination, such as an axial shaped charge unit and an annular / radial shaped charge unit, and part of the units can be integrated into a multi-point detonating structure. According to the mining method, the device is utilized, three-dimensional blast hole arrangement is adopted, energy gathering units with different functions are arranged at specific blast hole positions, and in-hole multi-point detonation and inter-hole millisecond detonation technologies are combined, so that efficient and directional crushing of ore rocks under the condition of no preset free surface is achieved. The device is matched with the method, the difficulty, the cost and the risk of complex ore body mining are reduced, and the efficiency and the safety are improved.

The invention provides an explosion-proof reactor and application, and belongs to the field of chemical equipment. The explosion-proof reactor comprises a shell with openings in the upper end and the lower end, and an upper sealing head and a lower sealing head which are respectively arranged at the upper end and the lower end of the shell; a plurality of reaction tubes are arranged in the inner cavity of the shell; a feeding sleeve is arranged on the upper sealing head, and a first feeding hole and a second feeding hole are formed in the feeding sleeve; a discharge hole is formed in the lower sealing head; and explosion-proof grids are respectively arranged in the inner cavities of the upper sealing head and the lower sealing head. The tail end spray pipe of the feeding distributor penetrates through the anti-explosion grid to directly introduce a combustible raw material medium into the reaction pipe, so that an explosion atmosphere is prevented from being formed in the space of the upper sealing head. According to the explosion-proof reaction tube, the explosion atmosphere is limited in the reaction tube, possible fire explosion in the reaction tube is controlled within the range of the reaction tube through the explosion-proof grids at the two ends of the reaction tube, the explosion-proof grids serve as a detonation-resistant or detonation-resistant flame arrester of the reaction tube, and then the explosion-proof effect is achieved.

The invention discloses an experimental device and an experimental method for gas / dust explosion flame-shock wave superposition coupling effect and combustible medium explosion transition induced by gas / dust explosion flame-shock wave superposition coupling effect under multi-parameter influence. Comprising a visual explosion system, a gas leakage diffusion system, a powder leakage diffusion system, an ignition system, a gas supply system, a powder spraying system, a discharge system, a displacement regulation and control system, a data acquisition system, a synchronous controller and a program control and data acquisition system. According to the experimental device and the experimental method for the gas / dust burning flame-shock wave superposition coupling effect under the influence of the multiple parameters and the induced combustible medium burning explosion transition thereof, the action processes of mutual impact, superposition, coupling and the like of detonation / detonation head-on flame-shock wave under the multiple working condition parameters can be realized; and the experimental study on the process of inducing the leakage diffusion combustible medium explosion transition and the critical condition thereof fills the technical blank of the study on the explosion flame-shock wave coupling effect process and the secondary disaster evolution mechanism induced under the influence of multiple parameters.

An explosive fragmentation structure includes a fragment enhancing insensitive munitions (IM) liner. The IM liner includes a patterned metal structure having openings therethrough embedded in a compressible material to define a desired fragmentation pattern of the outer metal casing upon detonation of the explosive. The IM layer is positioned between and in conformal contact with the outer metal casing's inner surface and the explosive's outer surface.

In a MEFP warhead detonation of the main charge is controlled to provide elevated pressure at multiple locations on the back surface of the liner to cut the liner and to form and propel forward a plurality of EFPs. An initiation system is configured for multi-point initiation of a plurality of booster charges to detonate the main charge to produce a plurality of detonation waves that constructively interfere at multiple locations on the back surface of the liner to form pressure hot spots that cut the liner and to form and propel forward a plurality of EFPs. In different embodiments, the elevated pressures are between 110% and 200% of the detonation pressure at the front of an individual detonation wave. The liner may, for example, be a flat plate or a include a plurality of dimples in which case the boosters are aligned to the center of the dimples.

In a MSCJ warhead detonation of the main charge is controlled to provide elevated pressure at multiple locations on the back surface of the liner to cut the liner and to form and propel forward a plurality of SCJs. An initiation system is configured for multi-point initiation of a plurality of booster charges to detonate the main charge to produce a plurality of detonation waves that constructively interfere at multiple locations on the back surface of the liner to form pressure hot spots that cut the liner and to form and propel forward a plurality of SCJs. In different embodiments, the elevated pressures are between 110% and 200% of the detonation pressure at the front of an individual detonation wave. The liner may, for example, include a plurality of recesses such as shallow dimples or deeper conical structures in which case the boosters are aligned to the center of the recessed structures.