4 results about "Sympathetic detonation" patented technology

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 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.

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.

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.