12 results about "Sympathetic detonation" patented technology

The invention relates to a test system and method for characterization of a sympathetic detonation multi-physical coupling effect field, belongs to the technical field of near-field explosion impact tests, and solves the problem of inaccurate characterization of a charging sympathetic detonation effect field in the prior art. The device comprises a to-be-tested charging module, a fragment group size and quantity analysis module, a fragment group speed measurement module, an explosive shock wave overpressure test module and a sympathetic detonation visual characterization module, the fragment group size quantity analysis module is used for acquiring the load penetration perforation quantity and perforation area of the near-field fragment group; the explosion shock wave overpressure test module is used for testing a near-field explosion shock wave overpressure parameter; the fragment group speed measurement module is used for measuring near-field dense fragment group speed parameters; and the sympathetic detonation visualization characterization module is used for measuring the dynamic response process of the sympathetic detonation test. According to the invention, the test of the multi-physical coupling effect field in the charge sympathetic detonation process is realized.

This invention provides a numerical simulation method and system based on a Fortran-programmed Lee-Tarver equation coupled with an SPH model, comprising: receiving initial input data from the SPH numerical model; loading fixed parameters, reaction rate partitioning thresholds, and numerical protection parameters of the Lee-Tarver equation; calculating density ratio and relative volume deviations to correct anomalous data; calculating unreacted and reacted state pressures based on the Lee-Tarver trinomial equation, and calculating the mixed pressure under the current reaction progress; dividing the reaction process into ignition, early growth, and high-pressure growth stages, dynamically switching the calculation logic according to the threshold conditions of each stage, and accumulating the reaction rates of each stage to obtain the total reaction rate; performing single-step incremental constraints and boundary constraints on the total reaction rate; realizing the time evolution of the reaction progress through time-step integration, synchronously updating internal energy and pressure to ensure energy conservation during the detonation reaction process; calculating the sound velocity of SPH particles to realize the dynamic process simulation of the explosive from ignition to complete detonation or sympathetic detonation triggering.

The invention relates to a sympathetic detonation simulation visualization system based on sympathetic detonation reaction intensity grades, belongs to the technical field of sympathetic detonation simulation, and solves the problems that sympathetic detonation simulation in the prior art is high in cost and low in efficiency and cannot effectively quantify the reaction intensity grades for sympathetic detonation simulation. Comprising a three-dimensional basic model construction module which is used for constructing three-dimensional basic models of a main dispensed explosive and a dispensed explosive based on a to-be-simulated sympathetic detonation scene; the model rendering module is used for rendering virtual main dispensed powder and virtual dispensed powder in an unreal engine based on the sympathetic detonation scene to be simulated and the three-dimensional basic models of the main dispensed powder and the dispensed powder; and the sympathetic detonation reaction intensity evaluation and visualization module is used for performing sympathetic detonation simulation of the virtual main dispensed explosive and the virtual dispensed explosive in the unreal engine, evaluating the sympathetic detonation reaction level based on the energy received by the virtual dispensed explosive, and presenting the reaction visualization effect of the virtual dispensed explosive according to the evaluation result.

The present application relates to a kind of virtual simulation system for the sympathetic detonation experiment of shell charge, belong to sympathetic detonation simulation technical field, solve the problem that the risk of high, high cost, difficult to repeat and difficult to observe in the teaching of existing technology in live sympathetic detonation experiment.There is a sympathetic detonation model construction module for constructing the three-dimensional basic model of main charge, charged charge, bottom witness target and protective structure, and then rendering virtual main charge, virtual charged charge, virtual bottom witness target and virtual protective structure in unreal engine;Experimental interaction module is used to set control data and generate control command and send to sympathetic detonation implementation module;Sympathetic detonation implementation module is used to set the sympathetic detonation model construction module according to the control data received, simulate the sympathetic detonation process in unreal engine, also used to control the sympathetic detonation process according to the control command received.The sympathetic detonation experiment of shell charge is virtually simulated.

The invention relates to a visual sympathetic detonation simulation method based on an unreal engine, belongs to the technical field of sympathetic detonation simulation, and solves the problems of high cost, low efficiency and non-visual result of a sympathetic detonation simulation method in the prior art. Comprising the following steps: based on a to-be-simulated sympathetic detonation scene, constructing a three-dimensional basic model of a main dispensed explosive and a dispensed explosive; wherein the to-be-simulated sympathetic detonation scene comprises information of main dispensed powder and dispensed powder and an elastic shaft distance between the main dispensed powder and the dispensed powder; on the basis of the sympathetic detonation scene to be simulated and the three-dimensional basic models of the main dispensed powder and the dispensed powder, virtual main dispensed powder and virtual dispensed powder are rendered in an unreal engine; and constructing and loading an explosive power field model and a to-be-delivered explosive detonation criterion, and performing virtual main explosive delivery and virtual to-be-delivered explosive sympathetic detonation simulation in the unreal engine to complete sympathetic detonation visual simulation.

A multi-stage pulse target section fracturing method, preparation work; Constructing fishbone well; Lowering bridge plug; Ground to the delivery bin body into the required amount of combustion improver, and vacuum treatment to the explosion bin body, then lowering the explosion fracturing tool; Using high pressure nitrogen to make combustion improver rapidly enter the explosion bin body and mix with methane to form combustion improver-methane mixed gas, and then complete the in-situ production process of explosion fracturing bomb; Control the action of electric control connection buckle to separate the explosion bin body from the delivery bin body; After the separation and arrangement of the multi-stage tool explosion bin are completed, the packer is expanded and set in the target branch well section, forming a closed explosion fracturing well section between the set packer and the drillable bridge plug; Control the ignition electrode to perform ignition operation to detonate the combustion improver-methane mixed gas in the explosion fracturing bomb, and complete the transmission process from outside to inside along the wellbore by the way of sympathetic detonation. The method can realize multi-stage segmented explosion fracturing operation of the fracturing well section.

The invention discloses a tunnel energy-gathered smooth blasting charging structure and method. The charging structure comprises an energy-gathered charging pipe, a positioning hoop arranged outside the pipe in a sleeving mode and a positioning rail bar used for guiding installation. Triangular energy-gathering grooves which penetrate in the axial direction and are symmetrical on the two sides are formed in the energy-gathering charging pipe, and conical energy-gathering holes are formed in the two ends of the energy-gathering charging pipe. The positioning hoop is provided with elastic tooth petals which are expanded outwards, trapezoidal gaps are reserved between the tooth petals, and the section shape of the positioning rail bar is matched with the gaps. During construction, through clearance fit between the positioning rail bar and the positioning hoop, rotation of the energy-gathering charging pipe is limited, and it is ensured that the energy-gathering groove is accurately aligned with a tunnel design excavation contour line; the positioning hoop supports the shaped charge tube to be located in the center of the blast hole, an air gap is formed between the cartridge and the hole wall, the buffering effect is achieved, and damage of explosive shock waves to surrounding rock is reduced. The device integrates orientation, positioning, explosion propagation and filling, detonating cord-free sympathetic detonation is achieved, the filling procedure is simplified, and the half-hole rate and the construction efficiency of tunnel smooth blasting are remarkably improved.

This invention discloses a non-detonating cord initiation process and charging structure for smooth blasting with peripheral holes. It is used during tunnel excavation, where multiple blast holes are set, including multiple slotting holes, auxiliary holes, and peripheral holes. The peripheral holes are arranged along the tunnel contour, the slotting holes are located at the center of the tunnel contour, and the auxiliary holes are located between the peripheral holes and the slotting holes. Multiple evenly spaced emulsion explosive cartridges are placed within the slotting holes, auxiliary holes, and peripheral holes. The emulsion explosive cartridges are fixed to a blasting rod. The openings of the slotting holes, auxiliary holes, and peripheral holes are filled with drilling mud. One of the emulsion explosive cartridges contains a digital electronic detonator. This invention utilizes the sympathetic detonation characteristics of emulsion explosives and designs a reasonable charging structure to achieve effective detonation without detonating cords, thereby improving blasting efficiency, reducing costs, and improving tunnel formation quality.

This invention relates to a porous granular oil phase material for ammonium nitrate explosives and its preparation method. The composite oil phase material comprises an energetic material, an oil phase, and a borate ester-based ashless dispersant. Ammonium nitrate explosives prepared using the oil phase material of this invention overcome the shortcomings of existing ammonium nitrate explosives, effectively improving the explosive power, sympathetic detonation velocity, and detonation sensitivity of ammonium nitrate-oil mixed explosives. It also extends the storage stability period, prevents freezing in low winter temperatures, and significantly reduces the cost of the oil phase material for ammonium nitrate explosives.

The invention discloses an open-air pre-split hole rapid charging system and a using method thereof, and belongs to the technical field of engineering blasting. The system comprises a supporting unit and at least one filling cloth sleeve, the supporting unit is composed of a flexible supporting cloth sleeve and a plurality of standard supporting rods connected in series in the flexible supporting cloth sleeve, and the filling cloth sleeve is fixedly connected to the outer side of the supporting cloth sleeve and used for filling explosive cartridges. Through modular and flexible design, the problems that traditional bamboo chips are fixed in length, difficult to transport, low in charging efficiency and the like are solved, different hole depths can be rapidly adapted, and transportation and efficient charging are facilitated. The system supports a continuous charging mode and an interval charging mode, the interval assembly can be provided with a bag containing a high-energy combustible agent, the sympathetic detonation effect is enhanced, and blasting energy distribution is accurately controlled. The explosive loading method comprises the steps of supporting unit assembling, explosive cartridge loading, in-hole lowering, remote detonating and the like, operation is easy, convenient and reliable, and the explosive loading method is suitable for various open-air pre-splitting blasting projects and has good application and popularization prospects.

This disclosure relates to a protective device and method for testing detonators under high-temperature conditions. The protective device includes a protective cylinder and a detonating cylinder. The protective cylinder includes at least one first cylinder body and / or at least one second cylinder body. The protective cylinder is located inside the detonating cylinder, and a fixing mechanism for securing the protective cylinder is installed inside the detonating cylinder. A compensation mechanism is connected to the top of the protective cylinder to ensure that the tops of any two first cylinder bodies and / or second cylinder bodies are not on the same horizontal plane. This addresses the problems of previous detonator tests, which required heating the detonator in an explosion-proof oven before transferring it to a protective container for testing. The transfer process posed safety hazards, and the results of testing after the detonator cooled down were not accurate enough. Existing integrated testing devices did not consider high-temperature and confined space sympathetic detonation and output capability testing, leading to test failures and inaccurate results.

The present application relates to a kind of peripheral eye light surface blasting bulk charge device and blasting method.Charging device includes multiple fixed rings, multiple shaped charge structures, shaped charge pipe and explosive, shaped charge pipe includes two cross-sections for half circular annular shaped charge half shells, two shaped charge half shells are mutually butted, and two side seams are closed connection by sealing element, shaped charge structure includes positioning ring and hollow cone-shaped shaped charge cover fixed in the one end of positioning ring, multiple shaped charge structures are fixed between the both ends in the inside of shaped charge pipe, and the tip of shaped charge cover is all towards the one end of shaped charge pipe, fixed ring is provided between any adjacent two shaped charge structures, and the fixed ring is formed between shaped charge cover and close to it Medicine groove, explosive is loaded in medicine groove.Advantages: can realize no detonating cord long-distance continuous sympathetic detonation, can effectively prevent water and foreign matter into shaped charge pipe and cause to extinguish, can realize the shaped charge effect of blasthole connecting direction, can reach the effect of light surface blasting, whole design construction time is short, effectively reduce cost.