Detonation behavior of emulsion explosives sensitized by glass microballoons was studied. The detonation velocity and the failure diameter of emulsion explosives at various densities were measured in two charge configurations: cylindrical charges by ionization pins and conical charges by ionization pins and continuous resistance probes. …
Most use an electric current or pair of wires for detonation. ... Mine action programmes and the anti-personnel mine-ban treaty or "Ottawa Convention" have led to a reduction in the annual ...
The Gubei Coal Mine is located in Huainan City, Anhui Province, China. The working roadway is located at the third central depot of the North-1 Coal Roof Track. ... An efficient form of disperse charge and staged detonation (DCSD) cutting blasting technique is proposed in this study based on the preceding research. The technical mechanism of ...
Detonation is a louder, more explosive noise that sounds like someone banging on the side of the engine. Knocking is a term used in internal combustion engines, to describe the sound that is produced by the irregular burning of fuel and air in the engine. Detonation is a term used to describe the uncontrolled, explosive combustion of a fuel/air ...
The detonation sequence of this model involves the detonation of the upper charge in the first stage at 0 ms, followed by the lower charge at 10 ms, the upper charge …
Request PDF | On Jan 1, 2008, S. Peles and others published Numerical simulation of mine detonation beneath a generalized add-on armor structure | Find, read and cite all the research you need on ...
In this paper, burnt rock is taken as the research object. Based on the field investigation and data collection of open-pit mines with fire areas, the blasting and …
Purchase this Article for $25.00. Reactivity of ammonium nitrate-based explosives is associated with the presence of sulphide in the ground reacting with explosive products and in some instances causing spontaneous reactions which can lead to detonation. This paper explains the mechanism of these reactions, the potential cause …
Also, the mining industries traditionally manage mining operations (drilling, blasting, loading and hauling) and milling operations (crushing, grinding, and metal …
The study of DDT covers various engineering and physics fields, including mining, astrophysics, and engines. 6–10 The research studying flame acceleration and acoustic/shock wave interactions with flames has stretched for several decades. 11 Among all relevant physical properties, turbulence is known to play a key role in flame instability …
Detonation cellular structure captured on the test section soot-coated windows for a 2 ms valve delay in the 12 mm channel with argon; a) hydrogen-injection side of channel, b) oxygen-injection side of channel. Detonation travels from right to left, the bottom photo was flipped horizontally for better comparison with the top photo. Test 1200.
The Karadon mine, where field studies were carried out, is located in the north west of Turkey and is considered to be a highly gaseous coal mine. ... The first …
A new method has been developed for calculation of drilling-and-blasting operations parameters during mining with emulsion explosives application, which results …
The detonation of the fireworks created a loud noise and bright flashes of light. Detonation is often used in military applications, such as explosives and missiles. The detonation of the gas caused a massive explosion in the factory. Detonation is a rapid-burning process that can release a large amount of energy in a short period of time.
Numerical and experimental analysis of the detonation of sand-buried mine. January 2005. Authors: Norbert Heider. Fraunhofer Institute for High-Speed Dynamics, Ernst-Mach-Institut EMI. A. Klomfass ...
surrounding both mines and some nearby stones at the Golf mine (C). (E) Pluton device for low-order detonation mounted at a mine. (F, G) Underwater photographs showing mines after low-order detonation (January 2022). Note the little damage to the mine casing (F) and the remaining explosive material scattered at and around the mine …
To arm the mine by the method described below, a thorough knowledge of explosives and demolition materials and the use and installation of land mines and boobytraps is required. Material on these subjects and techniques is contained in FM 3-5, FM 5-25, FM 5-31, FM 20-32, FM 31-10, TM 9-1375-200 and TM 9-1345-200.
The Influence of Time on the Density and Detonation Velocity of Bulk Emulsion Explosives – a Case Study from Polish Copper Mines June 2019 Central European Journal of Energetic Materials 16(2 ...
Mining of Mineral Deposits, 13(3), 22-30 QE – explosion heat of 1 kg of the used explosive taking into account the extent of detonation velocity realization, kJ/kg. The arrangement …
From contacts with scientists in other countries, it appears that the CF are not alone in facing this kind of situation, where they are forced to waive the statements on mine protection and accept whatever industry can deliver. The acquisition of mine-protected equipment is a challenging task. The Army normally states its requirements in terms of …
Gem; Smoke Mine Smoke Mine Mine, Spell, AoE, Duration, Movement, Travel, Blink Level: (1-20) Cost: (6-13) Mana Reservation: (6-13) Mana Cooldown Time: 5.00 sec Can Store 3 Use(s) Cast Time: 0.50 sec …
A detonation is best defined as a reactive shock wave. A shock wave is a high-intensity pressure pulse which moves supersonically, with respect to the sound speed, in the uncompressed medium. The speed of sound in water is around 1500 m s −1; a shock wave would move faster than this, e.g. 1600 m s −1.
Transition from deflagration to detonation, spark ignition, and detonation characteristics of ethylene-oxygen mixtures in a tube ... (mine galleries, grain elevators, flour mills, etc.) [6]. From a low-energy ignition, combustion starts first as a deflagration wave, which accelerates to ultimate detonation. Accelerating flames are of particular ...
Blasting plays a key role in mining operations, and its results can directly affect downstream operations, including crushing and milling. Therefore, predicting a …
The standards were re-developed and renamed as International Mine Action Standards (IMAS) with the first edition produced in October 2001. The United Nations has a general responsibility for enabling and encouraging the effective management of mine action programmes, including the development and maintenance of standards.
Blasting agents require a significant amount of energy to initiate detonation and are often used in mining and construction operations. 4. Insensitive High Explosives. Insensitive high explosives (IHEs) are a category of explosives designed to be more stable and less sensitive to initiation compared to traditional explosives. Examples of IHEs ...
Our work described in this paper focuses on predicting deflagration and detonation in detonation tubes rather than coal mines. Most pervious experimental studies of the properties of methane-mixture explosions were conducted in small-scale tubes, using high energy ignition sources. Additionally, these studies did not report on …
In drill and blast, developments in detonation systems have provided forward thinkers with an opportunity to dramatically enhance their blast capability. Highly tailored blasting solutions, with the potential for significant cost and productivity benefits, are now being implemented by teams and contractors who have been willing to invest in ...