Drilling and blasting designs for parallel hole cut and V-cut
1 Altmetric Metrics Abstract The Karadon mine, where field studies were carried out, is located in the north west of Turkey and is considered to be a highly The method of induced blasting, may it be from surface or underground, has become a proven approach during depillaring operations in blasting gallery, longwall Emerging trends in drilling and blasting technology
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Mining Blasting SpringerLink
Mining blasting is the application of blasting technology in mine production. The purpose is to use the compression, loosening, destruction, and throwing The rock drilling and blasting method is the most commonly adopted method for rock roadway excavation in China, where cutting efficiency is the key factor affecting Theory and numerical simulation of deep hole cut blasting
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Drivage Excavation Using Drilling and Blasting SpringerLink
The burn-cut blasting pattern is used in all the Indian metalliferous mines to make drivages. The pattern consists of a set of holes to be blasted against the free face Drilling and blasting are the critical and important operations of every hard rock mine, contributing up to 25% of the overall mining cost in some mining operations. However, optimization of the cost Optimization of Drilling and Blasting by Empirical
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Optimization of the drilling-and-blasting process to
Based on the mining technica l conditions of mine, the method of vertical blast hole charges with a short-delayed blasting was adopted. The blasting block that was chosen for the Based on the empirical formula L 2 ≥ (0.7–0.8) W d ≥ 3.15–3.6m, the designed packing length of 3.6 m is feasible.. As shown in Figure 2, a diagonal hole-by-hole detonation network was used in the field Study on Blasting Technology for Open-Pit
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Numerical Modelling of Blasting Fragmentation
controllable parameters that affect the energy efficiency in rock blasting [6]. The optimization of drilling and blasting parameters in terms of rock fragmentation can contribute to improving the productivity of mine-to-mill operations (loading, trans-port and milling) and minimizing the total operation costs [1,7]. For instance, the dataThe mining cycle consists of the following operations: drilling and blasting, roof bolting and scaling, transportation of rocks by haulers or loaders to the unit discharge points, then by belt conveyors and skips to the surface, from where by belt conveyors to the ore enrichment plants. 3.2. Seismic monitoring and data processingSeismic evaluation of the destress blasting efficiency
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Drilling and blasting designs for parallel hole cut and V-cut
Explosives are probably the most cost-effective method of rock excavation in underground mining operations 1,2,3.Tunnel and underground rock excavation have largely relied on drilling and blastingIn conventional blasting when explosive is detonated, it releases huge amount of effective and non-effective energies that can produce gas and shock accompanied by light, heat, sound and pressure. The effective energy can act as a useful tool in breaking rock for mining and construction purposes. However, the non-effective Emerging trends in drilling and blasting technology
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Surface and Buried Explosions: An Explorative Review with
In mining industries, blasting is employed to fragment large rock masses into smaller units. characteristics of rock mass and drilling-blasting parameters. The former set cannot be controlled, however, the latter set can be altered (2006) A computational analysis of detonation of buried mines. Multidiscip Model Mater Struct Drilling and blasting methods have been used as a common driving technique for shallow-hole driving and blasting in rock roadways. With the advent of digital electronic detonators and the need for increased production efficiency, the traditional blasting design is no longer suitable for deep hole blasting. In this paper, a disperse Theoretical and numerical simulation investigation of deep
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Study on Blasting Technology for Open-Pit Layering of Complex Mine
By establishing a mathematical model of cumulative damage of rock mass blasting, it shows that the depth of impact of mining blasting on the slope of Jianshan open-pit was 0–3.6m, but theThe primary purpose of blasting is to fragment rock, and there are significant rewards for delivering a fragmentation size range that is not only well suited to the mining system it feeds, but also minimizes unsaleable fractions and enhances the value of what can be sold. The outcome of blasting operations is determined by a number of Optimization of Drilling and Blasting by Empirical Modelling
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Drill and Blast Performance Evaluation at the Obra Pit of
28 GMJVol. 16, No. 2, December, 2016 Drill and Blast Performance Evaluation at the Obra Pit of Chirano Gold Mines Ltd, Ghana* 1P. A. Eshun, 1B. O. Afum and 2A. Boakye 1University of Mines and Technology, P.O. Box 237, Tarkwa, Ghana 2Kinross Gold Corporation Chirano Mine, Ghana Eshun P. A., Afum B. O. and Boakye A. (2016), “Drill It is one of the most crucial factors influencing the energy utilization of explosive detonation and thus controlling rock fragmentation in rock blasting of civil and mining engineering (HosseiniRock Fracture and Blasting: Theory and Applications
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Blast-Casting Mechanism and Parameter Optimization of a
During the research on bench deep-hole blast casting, the blast-casting parameters are directly related to the blast-casting results, so it could reveal the mechanism for improving the effect thereof. Based on the principle of the plane charge method, both the stress wave and detonation gas were considered to affect rock fragmentation and casting, a model of The blasting of rocks using explosives is performed to fragment rocky material into blocks and particles of different sizes. In addition, the sizes of fragments must be smaller than those of the feeding of primary crushing [1,2].Therefore, the optimization of drilling and blasting is essential for controlling ore fragmentation and, consequently, the Blasting Fragmentation Study Using 3D Image Analysis of a Hard Rock Mine
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specific site conditions. The BPG is for open cast coal mines, particularly those with hot holes and is intended to be used by mining personnel such as drilling crews, blasters, blasting assistants, blasting foremen, mine overseers and production managers. This BPG is a compilation of knowledge gathered from various SOPs for the Drilling and blasting are fundamental operations in the mining cycle and constitute an important component of the mining costs. Rock fragmentation can in principle be managed by means of two options: by increasing or reducing the specific consumption of explosives, or by modifying the drilling pattern.(PDF) Blasting and Mining Raleke R . C . Okeke
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Modelling the Source of Blasting for the Numerical
The mining and construction industries have long been faced with considerable attention and criticism in regard to the effects of blasting. The generation of ground vibrations is one of the most significant factors associated with blasting and is becoming increasingly important as mining sites are now regularly located near urban Blasting outcomes have significant impacts on downstream mining operations such as loading, hauling, crushing, milling, and mineral processing. An ideal blasting plan can result in decrease in undesirable blast-induced impacts and in supplementary costs of downstream operations. This study developed a new Optimization of Blasting-Associated Costs in Surface Mines
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(PDF) Overbreak Control in Development Face Blasting of Underground
• Line-drill in the periphery holes played a vital role in the reduction of overbreak due to face blasting in an underground metal mine [71]. • PPV values dropped by 18 % due to 3 rows of lineDrilling and blasting continues to be an important method of rock. ing [1-2]. The term “rock fragmentation” is. an index that is used to estimate the effect of cut blasting in the. mining(PDF) Blasting and Mining ResearchGate
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Energies Free Full-Text Effect and Response of Coal and
Different types of deep-hole blasting techniques are needed to solve gas drainage problems in complex and variable cases. Blasting parameters suitable for mines are selected based on the relationship between blast stress field changes and gas flow combined with field application and numerical simulation. The Datong Mine was a
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