"Explosion technology"— scientific and technical journal

Improving the efficiency of blasting operations at the development of mineral deposits

Keywords: rock blasting, explosive, elementary compositionss, rock mass, ore mine, quarry, crushing, closely spaced charges, concentrated charges, submicron particles, nanomaterials, environmental problems

The authors discuss the state-of-the art of the theoretical and practical aspects of rock blasting and describe new approaches and ideas expanding opportunities of blast action control in mineral deposit mining.

About one approach to model destruction of solid rock underground explosion

Keywords: модель разрушения, гипотеза, структурно-тектонический блок, прочность на разрушение, давление фазового перехода

On the basis of experimental data on explosions underground, including nuclear, presented the postulates of the physical model of destruction of solid rock. The hypothesis about a new physical phenomenon that bears the hidden nature, which consists in increasing the strength of rocks from the values characteristic of the open surface to pressure values of phase transformation depending on the distances in the interior of structural-tectonic block.

Numerical calculation of long kamuflet blast charge

Keywords: burst, cylinder, charge detonation, the zone of destruction, numerical calculation

In comparison with theoretical approach held in two-dimensional setting of numerical calculation of cylindrical charge explosion. Are the results of the calculation as a field of speeds and configurations of zones of devastation. Reviewed instant detonation incidents and taking into account the real speed of detonation.

Development of technological circuits of explosions for overburden movement to the emerging space

Keywords: explosion, the internal resistance of piles, blade, blasting scheme, kinematics of movement of blasted, selective styling, the specific consumption of explosives, the coefficient of discharge

Consider some of the physical principles of the development of technological circuits of explosives, to enhance the movement of overburden in the emerging space power of the explosion. Showing restricted use of traditional materials to increase the rate of dumping by increasing rate. To increase the effectiveness of the explosive movement of overburden are encouraged to develop special blasting scheme, based on certain principles.

Method of determination sizes range zones of destructions from the single cylindrical charge taking into account its sizes, range dissipation energy and dynamic break-down point

Keywords: zones of destructions, dissipation energy, dynamic strength, wave of tension, zones of destructions, energy dissipation, dynamic break-down point, strain wave, crack

In article method determination sizes range zones of destructions (recrushing, crushing, cracking) from single cylindrical charge taking into account its sizes, range dissipation energy and properties of rock is described. Results of calculation for three type’s granite occurrence of the Gavrilovo Leningrad region are given.

Blasting rocks using a confined blasting method

Keywords: rock blasting, explosion, porosity, solidness, rocks

The article proposes a new method of blasting fragile and yielding rocks. The findings reveal that the porosity and the solidness of rocks have a major influence on rock blasting. New ratios that enable us to determine the area of the zones for regulatory rock fragmentation are presented.

Investigating the blasting of complex structure rock massifs using the confined blasting method

Keywords: rock blasting, explosion, porosity, solidness, rocks

When evaluating the zone of the explosion chamber using the confined blasting method in rocks of different strength it is necessary to account for the movement of the detonation products from the areas of hard rock inclusions to the areas of weak rock. The movement of the detonation products causes a drastic drop of pressure in the drill hole and the termination of the growth of cracks in the areas with hard rock inclusions. The paper presents a scheme for calculating this.

Emulsion boosters

Keywords: emulsion explosives, cartridged emulsion booster, physicochemical properties, explosive characteristics, tests of boosters

The paper comprises data on the development of emulsion boosters in Russia. It describes basic characteristics of a cartridged emulsion booster for initiation of borehole charges of commercial explosives and the results of testing the boosters in open cuts.

Detonation of boreholes, containing emulsion explosives sensitized by gas bubbles

Keywords: emulsion explosives, detonation, density, critical diameter

In article propose a new method of determination detonation critical diameter and method of calculation initial density of emulsion explosives for blasting boreholes different depth.

Modular and container plants for emulsion explosive production

Keywords: plants for production of emulsion explosives, characteristics of plants

The paper presents data on the development of plants for production of emulsion explosives in Russia. It describes basic characteristics of emulsion explosive production and different types of plants.

Influence of the chemical composition oxidazes solution on detonation velocity and performance of emulsion explosives

Keywords: emulsion explosive, oxidaze solutions, detonation velocity, perfomance

Analysis of the results of the chemical composition oxidaze solutions on detonation velocity and performance of emulsion explosives was carry out. It is established for oxide balanced explosives that introduction in composition oxidaze solutions nitrates same metals result in light decrease detonation velocity and perfomance emulsion explosive.

Experimental results of determining the detonation ability of different types and structure explosive mixtures

Keywords: explosives, mixtures, structure, detonation capability, critical diameter of detonation

The experiment results on the estimation of the detonation capability of the various explosive materials of different types and structure: liquid, emulsion, coarsely dispersed based on solid materials. The obtained results prove that the detonation capability of the compound explosives depends on the structure, starting from the perturbance in the molecule arrangement and defects in the primary crystal formations.

Advanced systems of distributing and delay detonation

Keywords: explosion, detonator, impact, relay delay, gas-dynamic connector, shock-wave tube, electronic delay

Some components of electric and non-electric blasting of mass industrial explosions with as much as possible qualitative parameters of safe devices of switching, initiation, distributing and transfer of a detonation with a necessary high-precision time delay are developed by us.

Sensitivity to impact and detonation parameters for mixtures of okfol-3.5 with nanostructured titanium compounds

Keywords: sensitivity to impact, parameters of detonation, okfol

Various metallic additives for increasing the power of high-explosive and throwing action of explosive compounds are introduced typically. The introduction to okfol-3,5 nanostructured titanium compounds on the parameters of detonation and sensitivity to impact are examined.

Seismic action of Kambaratinsk explosion

Keywords: seysmic waves of explosion, accelerograms, velosigrammy, the damping of the amplitude, the intensity of the seismic action

The results of the registration seysmovzryvnyh waves Kambarata explosion at epicentral distances from 400 m to 50 km. On instrumental data defined seysmovzryvnyh wave attenuation and built isoseists seismic intensity of the blast at the industrial buildings and development of the region. Engineering inspection of these facilities after the explosion showed that the explosion was provided by the seismic safety of protected structures.

On updating and peculiarities of expert organizations activities according to changes of law "On industrial safety of hazardous production facilities"

Keywords: hazardous production facilities, industrial safety, expertise, false imprisonment of industrial Safety expertise

The Federal Law № 22-FZ "On Amending the Federal Law "On industrial safety of hazardous production facilities" was enacted 4 March 2013. Considered significant changes made to it, particularly marked activities of expert organizations according to these changes.

Inspection and analysis of unauthorized operation of electrodetonator ED-8-G during icebreaking blasting

Keywords: electrodetonator, icebreaking blasting, unauthorized explosion, explosive chain, static electricity, stray currents, leakage currents, electroexplosive chain

Was carried out the analysis of reasons of unauthorized explosion during icebreaking blasting on Northern Dvina river. Analyzed the causes and circumstances of the accident, the recommendations are designed to ensure trouble-free performance of such works.

Parameters affecting the velocity of propagation of seismic blast waves

Keywords: displacement speed, specific seismic effect, seismic action, seismic, drilling and blasting parameters

In this thesis are presents an analysis of the seismic data which obtained while Drilling and blasting operations by using charges of different diameters. The paper shows the dependence of the ground motion from the diameter of the hole (well). The amendment to the coefficient of seismicity of the equation M.A. Sadowsky to calculate the speed of ground motion in the near field of the production Drilling and blasting operations has been defined.

Vibration characteristics of the underground pipeline while the seismic waves action, caused by the explosion, calculated on the model of pipeline

Keywords: seismic impact, blast, pipeline construction, drilling and blasting parameters

In this thesis describes an experiment to study the model pipeline, set up to determine the level of seismic influence on it while producing blasts. The goal of the experiment - determining of the coefficient of the attenuation of rate of ground motion in the seismic blast waves. This publication provides a detailed analysis of soil displacement and displacement that have arisen in the model pipeline when exposed of seismic blast waves.

Estimation of automatic systems ASVP-LV.1M efficiency on localization of methane and coal dust explosion in “Vorkutinskaya” mine

Keywords: accident, explosion, the flame front, air shock wave, localization, explosion suppressing, ASVP-LV

An analysis of the inspection record and acts of technical investigations into the accident , which occurred February 11, 2013 at the excavation site of lava 832-th layer of Triple structural unit "Mine Vorkutinskaya" (JSC "Vorkutaugol") , is given in the article. Described the likely mechanism for the spreading and localization of methane and coal dust explosion, described the sequence of the explosion localization by automatic systems ASVP -LV and ASVP-LV.1M , and is given gas-dynamic calculation of the explosion air shock wave caused the observed damages.

Redistribution of energy in the coal mine environment as one of the causes of dust-air mixtures ignition and the shock wave appearance

Keywords: dust-air mixture, explosion, coal mine

This paper describes a new approach to the explanation of the issue, which does not contradict the well-known representations, and develops the notion of the role of hot water (water vapor) as a source of energy, which leads to the appearance of dust air mixture ignition.

Use neural network methods to identify features of the combustion process solid fuels

Keywords: neural network model, artificial neural network, especially the process, combustion, solid fuel

Based on studies using modern computer technologies developed neural network model which allows to extract new knowledge from experimental data. Installed some features and regularities of combustion of solid toplivav conditions the liquid medium and high pressure.

Application of the quadripoles connection regularity condition in models of electroexplosion chains analysis

Keywords: elektroblasting, the regularity, four-pole

Consider the representation electroblasting chains in the form of various compounds of two-, given the method of accounting the regularity condition connections. The practical examples of checking the condition of regularity and analysis electroblasting chains represented by four-terminal connection.

Analysis of the accident, related with the explosion of methane and coal dust, occurred 2013.02.11 in mine "Vorkutinskaya" (JSC "Vorkutaugol")

Keywords: accident, an explosion, the investigation, the gas dynamic phenomenon, gas emission, the frictional sparks

As result of analysis of the Inspection record of group accident and Act of the technical investigation of the accident, that take place 11 February 2013 on the excavation site Lava 832-y layer Triple structural unit "Mine Vorkutinskaya " (JSC " Vorkutaugol") it was found that the commission investigating the causes of the accident were not taken into account important facts of circumstances may have led to the accident involving the explosion of methane and coal dust , such as gas-dynamic phenomena and frictional sparking a strong rock cutters executive body of the combine or machine type «Hazemag»; as a result it was incorrectly determined the place of explosion, its reasons and made incorrect the conclusions.