Following an investigation, the research team concluded that the charge structure and small diameter package can potentially compromise the detonation …
Zhejiang Lihua Civil Explosive Co.,Ltd. is a designated production enterprise of national civil explosive equipments. The company was formerly known as Zhejiang Limin Chemical Factory founded in 1965, and was affiliated to Zhejiang Province National Defense Science and Technology Industry Office; it began the production of Emulsion explosives since …
To address the sensitivity of emulsion explosives to various parameters including pressure, a study of a particular ammonium nitrate (AN) based emulsion explosive has been undertaken using the ARC ...
Aluminum powders with contents of 2%-14% were added into the formulation when the temperature of emulsion explosive is about 70°C. Electrical measurement was used to get the detonation velocity ...
Emulsion explosives are a common industrial explosive and have a non-ideal detonation behaviour. The detonation performance for a given product changes with the charge diameter, ground conditions, connement and density. The burning process of an emulsion explosive has been modelled with an ignition and growth model in the LS-DYNA code. …
Proposing a numerical simulation method for SC-CO 2 directional fracturing based on equivalence to No.2 rock emulsion explosive, we use the SPH particle algorithm to enhance visualization of the rock-breaking area. Our findings show that the explosive method yields a larger rock-breaking volume than SC-CO 2. Under identical explosive …
The No.2 rock emulsion explosive was selected due to its excellent water resistance, particularly in underwater blasting [35]. The density of the No.2 rock emulsion explosive is 0.9–1.10 g/cm3, the detonation velocity 3600 m/s, the deflagration energy of the unit volume 4.5 GJ, and the equivalent TNT coefficient of the No.2 rock emulsion ...
Meishan Iron Mine uses the No. 2 rock emulsion explosive for production blasting. Based on the specifications of explosive and relevant publication, the material parameters of the No. 2 rock emulsion explosive are shown in Table 1 (Li et al. 2011 ).
This paper examines the practical and economic benefits of using bulk emulsion explosives in underground development mining; compared to ANFO, ANFO derivatives and packaged explosives. The key economic benefit of bulk emulsion is the replacement of relatively high cost packaged explosives with a bulk product. Key practical benefits …
The invention discloses a rock emulsion explosive and a preparation method thereof. The oil phase material of the emulsion explosive is prepared by mixing polyisobutene succinic acid triethanolamine ester serving as a novel polymer emulsifier with soyabean lecithin, vacuum cut I oil, vacuum cut II oil, Vaseline, paraffin and microcrystalline wax, so that …
In the study, the two-color pyrometer technique was used to measure the transient temperature field of emulsion explosives with different contents of TiH 2 powders. The experimental results showed that the introduction of TiH 2 powders could significantly increase the explosion temperature and fireball duration of emulsion …
No. 2 rock emulsion explosive. The traditional smooth blasting charge structure used in the East Tianshan tunnel is optimized and adjusted based on the critical distance. A series of full-section tests are conducted and the results are analyzed to assess the feasibility of using the new charging structure
The critical distance for No. 2 rock emulsion explosive under blasthole constraints was successfully measured to be approximately 1.0–1.1 m. Based on the critical distance, a new charging structure was designed …
The proportion of on-site mixed emulsion explosives in mining is getting higher and higher, in order to better use the explosive performance of mixed explosives to improve energy utilization. Based on the wave impedance theory, the wave impedance of mixed explosives is changed to make rocks The wave impedances are matched to achieve …
A microspheres-sensitized emulsion explosive, to be used in rock blasting tests, is characterized by means of the cylinder test. This test measures the expansion of a copper tube upon detonation of an explosive charge inside. Eight cylinder tests have been made with two different diameters ...
Generally, in order to successfully prepare emulsion explosive products, two-step production process must be taken [10].Firstly, ammonium nitrate (AN) supersaturated solution and oil materials are emulsified into emulsion explosive matrix [1, 2, 10].The formed matrix is a water-in-oil (W/O) emulsion, and the tightly wrapped film …
Emex® 70 is a high energy packaged emulsion explosive cartridge, designed for typical hard rock development, tunneling or very tough stoping conditions. The emulsion is robust and sensitisation with microspheres ensures excellent shelf-life and reliability of detonation.
The conventional emulsion explosives Kemitti 810 and Riomex UG were used at the sites. The target density was 1 ... Svärd J. 2010. Crack length or blast damage from string emulsion and electronic detonators. Rock fragmentation by blasting-Sanchidrián (ed.), pp. 469–479. Google Scholar. Pearson, 1901. K. Pearson. On lines …
Emulsion explosives (EE) are one of the most recently developed classes of energetic materials [1, 2, 3, 4, 5] and can be perceived as a step forward from the …
The rock–explosive interaction behaviour influences the blasting outputs in terms of breakage, fragmentation and induced hazards. The blast designers can …
United States Rock Emulsion Explosives Market Growth By Type: The construction sector in the United States Rock Emulsion Explosives market is growing as infrastructure projects and real estate ...
This review explores the rheology of emulsion explosive, especially the emulsion explosive matrix, through summarizing its flow, yield stress, viscoelasticity …
Orica's underground emulsion product, is an water in oil non explosive emulsion matrix developed for development and down hole applications in hard rock underground …
Generally, emulsion explosive is manufactured in two steps. Firstly, oil materials and AN supersaturated solution are emulsified into emulsion explosive matrix, and then the matrix is made into emulsion explosive by mixing with hollow glass spheres (microspheres) or air bubbles [14].Zero oxygen balance is the basic principle for …
Conference: Observation of the shock resistance of emulsion explosives in rock blasting ... Laboratory studies have indicated that the crystallization and desensitization of microballoon sensitized emulsion explosives start immediately after shocking or pre-compression. However, the question of whether or not the shocked …
Based on the theory of the combined action of stress waves and explosive gas, a formula for calculating the peripheral hole distance that integrates the effects of in …
The TNT equivalence of rock emulsion explosives which exploded in free air and outside of corridor conditions was investigated experimentally and numerically.The relationships between the peak pressure and scaling distance for the explosives explosions in free air and outside of corridor conditions were fitted by the test data,and the corresponding TNT …
Emulsion explosive (EE) Ukrayinit-PP-2 (Україніт-ПП-2) has been applied. The developed methods have been used to calculate DBOs parameters for the explosive.
The rock–explosive interaction behaviour influences the blasting outputs in terms of breakage, fragmentation and induced hazards. ... The explosives such as emulsion and slurry, having higher VOD, produce more shock waves upon detonation than explosives with lesser VOD (He and Yang 2019; Brinkmann 1990).
The No. 2 rock emulsion explosive is used for the on-site blasting, the density of the explosive is 1.24 g/cm 3, the detonation speed is D = 4200 m/s, the diameter of the blast hole is 42 mm, and ...
density explosives to break rocks effectively, but with continuous emphasis being given to environmental and social commitments, a shift in trend is observed from current use of site mixed bulk emulsion products to low density emulsion explosives in medium to hard grounds. Heltzen and Kure13 showed that low-density explosives
All explosives used were from the same batch of No. 2 rock emulsion explosives. The linear charge density ranged from 1 to 1.25 g/cm 3, the charge diameter was 13 mm, and the explosive ...
Traditional bulk explosive products for surface mining applications (ANFO, heavy ANFO and pumped emulsion-based explosives) span a range of relative bulk strengths …
Underground use of emulsion explosives on a large scale started in 2011 and by now Apatit has put into operation 15 mixing-and-charging units (including 9 units for loading upward holes and 6 ...
Download Citation | Experiment and Simulation of Explosive Compaction in Loess with #2 Rock Emulsion Explosive | To overcome the difficulty of field experiment of explosive compaction (EC ...
To overcome the difficulty of field experiment of explosive compaction (EC) technology for strengthening embankment of existing highway and to verify the reliability of numerical simulation, this paper took strengthening loess embankment of a highway with #2 rock emulsion explosive as an engineering background and put forward the method of …
Emulsion explosives (EE) have been commercially available in various forms for over 50 years. Over this period, the popularity and production technology of this class of energetic materials have been developing constantly. Despite this rapid rise to prominence and, in some applications, prevalence over traditional energetic materials, remarkably little …
