Nonideal detonation of Al-rich emulsion explosives

1997 ◽  
Author(s):  
Shigeru Itoh ◽  
Katsuhiko Takahashi ◽  
Kenji Murata ◽  
Yukio Katoh ◽  
Akio Kira ◽  
...  
Keyword(s):  
Emulsion Explosives ◽  
Nonideal Detonation

Nonideal detonation of Al-rich emulsion explosives

1997 ◽  
Author(s):  
Shigeru Itoh ◽  
Katsuhiko Takahashi ◽  
Kenji Murata ◽  
Yukio Katoh ◽  
Akio Kira ◽  
...  
Keyword(s):  
Emulsion Explosives ◽  
Nonideal Detonation

Thermodynamic calculation of ideal and nonideal detonation

1988 ◽  
Vol 23 (4) ◽  
pp. 446-454 ◽  
Author(s):  
S. A. Gubin ◽  
V. V. Odintsov ◽  
V. I. Pepekin
Keyword(s):  
Thermodynamic Calculation ◽  
Nonideal Detonation

Detonation characteristics of emulsion explosives sensitized by MgH2

2013 ◽  
Vol 49 (5) ◽  
pp. 614-619 ◽  
Author(s):  
Ya. F. Cheng ◽  
H. H. Ma ◽  
Zh. W. Shen
Keyword(s):  
Emulsion Explosives ◽  
Detonation Characteristics

Thermal Decomposition Conditions of Emulsion Matrix in the Emulsifier

2014 ◽  
Vol 1082 ◽  
pp. 387-390
Author(s):  
Hui Sheng Zhou ◽  
Xing Hua Xie ◽  
Kang Xu
Keyword(s):  
Thermal Decomposition ◽  
Ammonium Nitrate ◽  
Hot Spots ◽  
Hot Spot ◽  
Decomposition Mechanism ◽  
Heat Accumulation ◽  
Emulsion Explosives ◽  
Starting Point ◽  
Emulsion Matrix

The main background was the "3.11" accident in this paper. The starting point was based on the experts’ conclusions of investigation and analysis in the accident. Combining the decomposition mechanism of ammonium nitrate in the emulsion explosives and the lessons from the production of emulsion explosives explosion, the conditions of the emulsion explosives (matrix) thermal decomposition in the emulsifier are given that are the formation of hot spot and the accumulation of heat. Then the factors of hot spots generated in the production of emulsion explosives and the occurred conditions of the heat accumulation are analyzed and summarized.

Improvement of the Thermocouple Method for Testing Energy-Intensive Emulsions for Compatibility with the Sulfide Ores

2021 ◽  
pp. 58-63
Author(s):  
N.I. Akinin ◽  
◽  
A.S. Garmashov ◽  
V.V. Rudomazin ◽  
◽  
...  
Keyword(s):  
Ammonium Nitrate ◽  
Testing Temperature ◽  
Point Of View ◽  
Spontaneous Ignition ◽  
Sulfide Ores ◽  
Chemical Compatibility ◽  
Emulsion Explosives ◽  
Safety Testing ◽  
Sulphide Ores ◽  
Thermocouple Method

The results are presented concerning improving the thermostatic method for studying the chemical compatibility of modern industrial emulsion explosives based on the ammonium nitrate with surrounding materials, the increased reactivity of which can lead to spontaneous ignition and even explosion. An assessment of the compatibility of emulsion explosives with sulphide ores was conducted using an original thermocouple methodology developed at the D. Mendeleyev University of Chemical Technology of Russia, fixation of the thermal effects of the interaction of shell-free explosives based on the ammonium nitrate with sulfide minerals. Improved thermocouple method allows to determine chemical compatibility of the industrial explosives with the reactive rocks. It is distinguished by the possibility of continuous recording of the thermocouple measurements during tests using an oscilloscope and combines the reliability of the results with small laboratory weights of the test samples (no more than 20 g, which ensures safety testing). Temperature measurement accuracy is ± 2 °С. It is concluded that the method used is able to identify the cases of the most dangerous interaction from the practice point of view using the emulsion explosives when the pyrite content in the ore exceeds 85 %. The results of experiments on the applicability of thermocouple measurements to testing low-activity rocks, highly reactive pyrite ores, mixed sulfide ores of medium activity, as well as on the identification of the main regularities of heat release during the interaction of emulsion explosives with the sulfide ores are considered.

Enlightment of “May 20” Explosion Accident

2014 ◽  
Vol 1082 ◽  
pp. 391-394 ◽  
Author(s):  
Xing Hua Xie ◽  
Lei Wang ◽  
Hui Sheng Zhou
Keyword(s):  
Thermal Decomposition ◽  
Production Process ◽  
Ammonium Nitrate ◽  
Hot Spots ◽  
Hot Spot ◽  
Decomposition Mechanism ◽  
Heat Accumulation ◽  
Emulsion Explosive ◽  
Emulsion Explosives

This paper introduces the "5.20" of the emulsion explosive incident and analysis the cause of the accident. Based on the production of explosion accident summarizes the security problems of emulsion explosive production process, and relevant measures are put forward. Combining the decomposition mechanism of ammonium nitrate in the emulsion explosives and the lessons from the production of emulsion explosives explosion, the conditions of the emulsion explosives (matrix) thermal decomposition in the emulsifier are given that are the formation of hot spot and the accumulation of heat. Then the factors of hot spots generated in the production of emulsion explosives and the occurred conditions of the heat accumulation are analyzed and summarized.

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
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