Blasting-induced rock damage control in a soft broken …
Equation shows that, when an air deck exists, the wavefront pressure of the reflected shock formed by the blasting shock wave reaching the rock surface at the blasthole bottom is significantly enhanced, and the rock is broken by strong compression.When the air deck charge is used, it is assumed that, after the explosive …
Blasting Principles
Using explosives to break rock. Blasthole. A hole drilled into a rock to be filled with explosives for blasting. ... Emulsion Explosives. An emulsion is a physical mixture of …
Advanced Analytics for Rock Blasting and Explosives
Abstract. Blasting is a fundamental operation in the mining of metal and non-metal mine sites. There is a historical story of using explosive material in both underground and surface mines sites. The development of new technology to collect the data from the blasting operation provides an opportunity for mining companies to think about applying ...
Influence of density of emulsion explosives on its …
Many develop a low-shock energy ammonium nitrate-based researchers have indicated the extensive use and advan product to easily fragment weak overburden materials. tages of …
Emulsion Explosives: A Tutorial Review and Highlight of …
1. Introduction. Emulsion explosives (EE) are one of the most recently developed classes of energetic materials [1–5] and can be perceived as a step forward from the traditional energetic materials based on ammonium nitrate (AN), such as amatols, ammonals and ANFO (ammonium nitrate-fuel oil).
SPH numerical simulation of SC-CO2 directional fracturing and emulsion …
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 …
ISEE Paper Evaluation of Advanced Bulk Emulsion …
Nobel's Titan XL1000 bulk repumpable emulsion blasting agent ( emulsion) and Differential Energy (∆E) bulk loading technology in the blasting applications at the CC&V operation. The overall objective of the project was to determine what benefits this high performance bulk explosive product
Materials | Free Full-Text | Emulsion Explosives: A Tutorial …
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, …
Parameter Determination of an Ignition and Growth Model from Emulsion
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. …
TNT
Coefficient of a Rock Emulsion Explosive FAN Jun-yuFANG QinZHANG Ya-dongCHEN Li (51021001、50778175)； ...
Blast loading model of the RC column under close-in …
The measured data from a 1-kg rock emulsion explosive sphere was shown in Fig. 4. As compared in Fig. 4, the peak reflected overpressure and wave arrival time on the three gauges decrease from P3 to P1, with the increase of scaled distance. The normal reflected peak overpressure of 1-kg rock emulsion explosive on gauge P3 is …
A New Technology for Smooth Blasting without …
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
Advances in the rheology of emulsion explosive
This review explores the stability of emulsion explosive, through summarizing its instability reason, stability mechanism, affecting factors, improvement …
Emulsion Manufacturer (PowerNel™)
Nelson Brothers PowerNel™ emulsion products are powerful, reliable, safe, and industry leaders in performance. PowerNel™ emulsions are high quality and optimized for individual blasting applications.Nelson Brothers explosives emulsions are designed to provide the maximum performance in every rock type and in any condition.
Numerical simulation of rock mass blasting vibration using …
The unification of the two results was verified by comparing the experimental results with the numerical simulation results. The following were the main parameters in this experiment: the type of explosive was No. 2 rock emulsion explosive, the charge amount was 200 g, and the hole depth was 0.5 m. There were three groups in this experiment.
Implementation and Verification of Effectiveness of Bulk Emulsion …
Explosives are commonly used in the mining industry to extract minerals from hard rock deposits. Therefore, an efficient explosive should ensure that the appropriate blast outcome is achieved, taking into account the desired rock-breaking parameters and the costs of drilling and blasting works. Depending on the type of deposit …
Numerical simulation of rock mass blasting using
The main parameters for the numerical simulation of the rock mass blasting were as follows: the burial depth of the blasting particles was 3.0 m, the diameter of the explosive particle was 32 mm, the charging mode adopted uncoupling charge, the type of explosive adopted was the 2# rock emulsion explosive, and the charging mass was …
Rock–Explosive Interaction During Underground Blasting
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).
A New Technology for Smooth Blasting without Detonating Cord for Rock
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 for tunnel excavation. To assess the influence of the new charging structure on blasting performance, its economic benefits, and its ...
Determination of properties for emulsion explosives …
Department of Civil and Environmental Engineering • Division of Rock Engineering . Determination of properties for emulsion explosives..... Swebrec Report 2009:1 i ... Explosives, emulsion explosives, cylinder tests, detonation energy, numerical simulations, equation of state, LS-DYNA. ii
(PDF) Estimation of Jones-Wilkins-Lee parameters of emulsion explosives
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 ...
Field Testing for Emulsion Explosives
The simplest way to test for this is to take a small amount of emulsion and rub it between your fingers, if the emulsion feels gritty than it has begun to crystalize and should not be used for blasting. A proper …
Emulsion Explosives: A Tutorial Review and Highlight …
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 traditional …
Emex 70
Description. 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. It is a firm, water resistant cartridge which has a ...
Advances in the rheology of emulsion explosive
This review explores the rheology of emulsion explosive, especially the emulsion explosive matrix, through summarizing its flow, yield stress, viscoelasticity …
JK series emulsion explosive productine line – Kyoga …
JK Series Emulsion Explosive Productine Line. KYOGA brings in the worldwide advanced and fully automatic production line of JK series Rock Emulsion Explosive, which can produce explosive rolls of various diameters ranging from Φ25 to Φ120MM and has flexible production mode and strong adaptability to the market demand.
Emulsion explosives, loading equipment and blasting technologies …
On the basis of the data on actual heat of explosion, loading density and rock mass condition, the optimal parameters are substantiated for drilling-and-blasting with Subtek emulsion explosive and ...
Observation of the shock resistance of emulsion explosives in rock …
@article{osti_398344, title = {Observation of the shock resistance of emulsion explosives in rock blasting}, author = {Liu, Q and Tidman, P and Tunaley, D and Mullay, J}, abstractNote = {Laboratory studies have indicated that the crystallization and desensitization of microballoon sensitized emulsion explosives start immediately after …
Effects of water deck on rock blasting performance
When explosives are immersed 24 hours in water, ANFO will loss 98% of Ammonium nitrate (AN) while the water-in-oil based emulsion explosives loss 0.5% AN. 1 The degree of adverse influences of the water would be varied in different types of explosives but it is unavoidable when the water present in the borehole and directly in …
Vibration reduction technology and the mechanisms of surrounding rock
In this paper, No. 2 rock emulsion explosive was chosen for field blasting, and its explosive specifications and physical parameters are given in Table 3. Depending on the explosive type and charge construction of the blasthole, the equivalent blasting load time-history curves are shown in Fig. 7. The peak pressure of the single-hole charges ...