scholarly journals Influence of Explosive Charge Diameter on the Detonation Velocity Based on Emulinit 7L and 8L Bulk Emulsion Explosives

2018 ◽  
Vol 15 (2) ◽  
pp. 351-363 ◽  
Author(s):  
Piotr Mertuszka ◽  
Bogusław Cenian ◽  
Bartłomiej Kramarczyk ◽  
Witold Pytel
Keyword(s):  
Detonation Velocity ◽  
Explosive Charge ◽  
Emulsion Explosives ◽  
Charge Diameter

scholarly journals Estimation of Influence of Explosive Characteristics of Emulsion Explosives on Shotpile Width

2018 ◽  
Vol 56 ◽  
pp. 01003
Author(s):  
Victor Sinitsyn ◽  
Pavel Menshikov ◽  
Vyacheslav Kutuev
Keyword(s):  
Detonation Velocity ◽  
Dynamic Compression ◽  
Point Of View ◽  
Head Part ◽  
Detonation Pressure ◽  
Emulsion Explosives ◽  
Clastic Rocks ◽  
Total Magnitude ◽  
Efficient Type ◽  
Points Of View

The article deals with the question of the effect of explosive characteristics of emulsion explosives on the shotpile width. Currently, there are two main points of view to select an efficient type of explosive, which contributes to the qualitative destruction (fragmentation) of coarse clastic rocks. The first is based on the assumption that the detonation velocity of explosives must correspond to the break-down point of the rock (dynamic compression). Another point of view is that the detonation pressure of explosives determines only the head part of the pulse, on which the rock fragmentation is dependent only near the charge, in the contact zone around the borehole. The fragmentation of the entire rock volume within a given borehole array depends on the total magnitude of the explosion pulse, determined not by the detonation velocity, but by the total energy reserve of the explosive charge. Experimental explosions with some of the most common industrial explosives have been carried out in the current conditions of blasting of borehole charges by various types of industrial explosives from the point of view to select the most important parameter, which determines its influence on the shotpile width The investigations have been carried out according to the data obtained to establish that the energy properties of explosives (heat of explosive transformation and density of explosives) determine the decisive influence on the shotpile width, and the operability, the volume of the released gases, the detonation velocity for the change in the shotpile width have very little effect and may not be taken into account in calculations for the prediction of the shotpile.

Investigation of low detonation velocity emulsion explosives

2009 ◽  
Vol 45 (5) ◽  
pp. 618-626 ◽  
Author(s):  
V. V. Sil’vestrov ◽  
A. V. Plastinin
Keyword(s):  
Detonation Velocity ◽  
Emulsion Explosives

The influence of temperature on the detonation velocity of selected emulsion explosives

2019 ◽  
Vol 38 (3) ◽  
pp. 336-347
Author(s):  
Piotr Mertuszka ◽  
Krzysztof Fuławka ◽  
Mateusz Pytlik ◽  
Michał Szastok
Keyword(s):  
Detonation Velocity ◽  
Emulsion Explosives ◽  
Influence Of Temperature ◽  
Influence Of Temperature On

scholarly journals Enhancement of Explosive Welding Possibilities by the Use of Emulsion Explosive/ Rozwój Mozliwości Łączenia Wybuchowego Przez Użycie Emulsji Wybuchowych

2014 ◽  
Vol 59 (4) ◽  
pp. 1587-1592 ◽  
Author(s):  
B. Zlobin ◽  
V. Sil’Vestrov ◽  
A. Shtertser ◽  
A. Plastinin ◽  
V. Kiselev
Keyword(s):  
Thin Layer ◽  
Physical Properties ◽  
Detonation Velocity ◽  
Explosive Welding ◽  
Hardened Steel ◽  
Explosion Welding ◽  
Thin Layers ◽  
Emulsion Explosive ◽  
Emulsion Explosives ◽  
Thermo Physical Properties

Abstract Explosive welding is an effective method of joining of various metals and alloys. However, when the materials with very different strength and thermo-physical properties are welded or thin-layer cladding is performed, the difficulties occur which call for extra investigations. In the present paper, with the couples of steel / carbide composite and copper / hardened steel used as examples, under study were the peculiarities of bonding formation by the explosive welding of metals with highly differing properties. The experiments were carried out with emulsion explosive containing hollow micro-spheres and detonating in thin layers with the low (2 - 3 km/s) detonation velocity. Obtained results show that the emulsion explosives enable to extend the explosion welding potentiality.

scholarly journals Effect of aluminium additives on selected detonation parameters of a bulk emulsion explosive

2020 ◽  
pp. 99-113
Author(s):  
Bartłomiej Kramarczyk ◽  
Mateusz Pytlik ◽  
Piotr Mertuszka
Keyword(s):  
Detonation Velocity ◽  
Free Field ◽  
Aluminium Content ◽  
Velocity Measurements ◽  
Emulsion Explosive ◽  
Emulsion Explosives ◽  
Air Blast ◽  
Explosive Strength ◽  
Detonation Parameters

The article presents an assessment of the influence of aluminium granules content on selected detonation parameters of a chemically sensitised bulk emulsion explosive. The analysis covered determination of relative explosive strength using a ballistic mortar and Trauzl blocks, free field air blast tests and detonation velocity measurements. Five types of emulsion explosives with differing aluminium content were tested at loadings of 0, 1, 3, 5 and 7%.

scholarly journals Study of emulsion explosive quality assessment system based on soft measurement and multilevel fuzzy evaluation

2018 ◽  
Vol 189 ◽  
pp. 05003
Author(s):  
Yuesheng Wang ◽  
Chenqi Huang
Keyword(s):  
Quality Assessment ◽  
Detonation Velocity ◽  
Evaluation System ◽  
Assessment System ◽  
Fuzzy Evaluation ◽  
Emulsion Explosives ◽  
Soft Sensing ◽  
Soft Measurement ◽  
Sensing Model

Aiming at the inaccuracy and blindness of the traditional detection and assessment methods for the quality of emulsion explosives, a method for evaluating the quality of emulsion explosives based on soft measurement and multilevel fuzzy evaluation is proposed. The soft-sensing model of BP neural network can predict the online unmeasured performance indicators of detonation velocity and detonation online. The multilevel fuzzy evaluation method establishes the reliable multilevel fuzzy evaluation system based on the key parameters of the production process and expert experience. Experiments show that this soft-sensing model have made the convergence quickly and the accuracy highly,and can accurately predicts the detonation velocity and brisance of emulsion explosives online. In the last part, the design of quality assessment system can provide a new idea for solving the point of quality blindness detection and assessment.

Diameter Effect on Detonation Velocity of Ammonium Nitrate and Activated Carbon Mixtures

2007 ◽  
Vol 566 ◽  
pp. 101-106 ◽  
Author(s):  
Atsumi Miyake ◽  
Hidefumi Kobayashi ◽  
Hiroshi Echigoya ◽  
Katsumi Katoh ◽  
Shiro Kubota ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Ammonium Nitrate ◽  
Detonation Velocity ◽  
Stoichiometric Composition ◽  
Steel Tube ◽  
Detonation Properties ◽  
Charge Diameter ◽  
Tube Test ◽  
Predicted Values ◽  
Good Agreement

To obtain a better understanding of detonation properties of ammonium nitrate (AN) and activated carbon (AC) mixtures, steel tube test with several diameters was carried out for various compositions of powdered AN and AC mixtures and the influence of the charge diameter on the detonation velocity was investigated. The results of test indicated that the detonation velocity increased with the increase of the charge diameter. The experimentally observed values were far below the theoretically predicted values made by the thermohydrodynamic CHEETAH code and they showed so-called non-ideal detonation. The extrapolated detonation velocity of stoichiometric composition to the infinite diameter showed a good agreement with the theoretical value.

scholarly journals The Influence of Time on the Density and Detonation Velocity of Bulk Emulsion Explosives – a Case Study from Polish Copper Mines

2019 ◽  
Vol 16 (2) ◽  
pp. 245-258 ◽  
Author(s):  
Piotr Mertuszka ◽  
Krzysztof Fuławka ◽  
Mateusz Pytlik ◽  
Jarosław Wincenciak ◽  
Andrzej Wawryszewicz
Keyword(s):  
Detonation Velocity ◽  
Emulsion Explosives ◽  
Copper Mines

NON-IDEAL DETONATION PROPERTIES OF AMMONIUM NITRATE AND ACTIVATED CARBON MIXTURES

2008 ◽  
Vol 22 (09n11) ◽  
pp. 1319-1324 ◽  
Author(s):  
ATSUMI MIYAKE ◽  
HIROSHI ECHIGOYA ◽  
HIDEFUMI KOBAYASHI ◽  
TERUSHIGE OGAWA ◽  
KATSUMI KATOH ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Ammonium Nitrate ◽  
Detonation Velocity ◽  
Stoichiometric Composition ◽  
Steel Tube ◽  
Detonation Properties ◽  
Charge Diameter ◽  
Predicted Values ◽  
Good Agreement

To obtain a better understanding of detonation properties of ammonium nitrate (AN) and activated carbon (AC) mixtures, steel tube tests with several diameters were carried out for various compositions of powdered AN and AC mixtures and the influence of the charge diameter on the detonation velocity was investigated. The results showed that the detonation velocity increased with the increase of the charge diameter. The experimentally observed values were far below the theoretically predicted values made by the thermodynamic CHEETAH code and they showed so-called non-ideal detonation. The extrapolated detonation velocity of stoichiometric composition to the infinite diameter showed a good agreement with the theoretical value.

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