Evaluation of effect of blasting pattern parameters on back break …
In the past, mostly empirical methods were used in design of blasting pattern. With regard to the fact that the number of effective parameters is too high and the interactions are …
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Methodological basis for adaptation of the drilling and blasting
Russian Mining Industry since 1994 ISSN 1609-9192 (print) ISSN 2587-9138 (online)
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DESIGNING CONTROLLED BLASTING IN THE VICINITY …
This paper presents a case study at an Indian iron ore mine where controlled blast patterns were meticulously planned after conducting a few trial blasts for conducting blasts near numerous …
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An Assessment of Drilling and Blasting Techniques at Granite …
The objectives were to identify drilling and blasting equipment, find out the drilling pattern and parameters, assess blasting method and its compliance with safety practices in …
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Blastability and Ore Grade Assessment from Drill Monitoring
Blasting performance is influenced by mechanical and structural properties of the rock, on one side, and blast design parameters on the other. This paper describes a new …
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(PDF) Blasting pattern optimization in open-pit mines by using the
The genetic algorithm (GA) is the recommended method to utilizing the optimized pattern for the blasting pattern selection under the many effective parameters which is the …
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(PDF) Designing controlled blasting in the vicinity of sensitive
This paper presents a case study at an Indian iron ore mine where controlled blast patterns were meticulously planned after conducting a few trial blasts for conducting blasts …
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Blasting Principles
Reference blasting fundamentals, properties of explosives and blasting principles in this section. For more specific requirements, reach out to our Orica specialists for an in-depth discussion today. A term commonly applied for mining …
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Drill Pattern Optimisation for Large Complex Blasts to …
Fig. 1 Ore extraction process starts at the drill design and ends at the crushing of material (Haugg et al. 2023) Fig.2 Drill and Blast Decision Variables 1 Introduction In surface mining …
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An Overview of Drilling and Blasting in Mining
Various methods of blasting have been incorporated in mining, such as: 1. Surface Blasting: Applied in open-pit mining, surface blasting ensures the effective fragmentation of …
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Drilling & Blasting
It's also a science and bit of an art form in its own rights because of the planning that's involved. Drilling patterns, blasting sequences, load weights, and knowing where the …
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Journal Mining and Environment (JME)
bench height, and drill bit diameter. For iron ore blasting blocks, experts use a pattern of 3×4 meters for 6-inch diameters and 4×5 meters for 10-inch diameters. For overburden and waste …
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Chapter 8 BLAST DESIGN
Delay patterns, and varying the hole array to fit natural excavation topography, allow for more efficient use of the explosive energy in the blast. Benches may be designed and carried forth …
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Mechanism of iron ore blasting fracture using axial uncoupled …
blasting and achieving optimal blasting effects. Numerous blasting engineers and rock dynamics re-searchers have conducted extensive theoretical analyses, laboratory experiments, and …
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An empirical relation to calculate the proper burden in blast …
An optimized blasting pattern is applied after reviewing and considering the problems of the basic pattern. 2. Geology of Chadormalu iron ore mine Chadormalu iron ore mine is located 165 km …
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SELECTION OF THE MOST PROPER DRILLING AND BLASTING PATTERN …
This paper aims to select the most proper drilling and blasting pattern for Sangan Iron Mine, Iran. To achieve this, in the first step, rock fragmentation, back break, fly rock, specific charge and …
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excavation of ore with drilling blasting
Using AHP method, drilling and blasting patterns in underground copper mine 'Jama' Bor are investigated and analysed. According to the obtained results, alternative 2 with contour drilling …
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Innovative Blasting Practices for Underground Hard Rock …
Additionally, the blasting methods for narrow vein mining and excavation in ore-waste combination have also been discussed in this chapter. 8.1 Introduction Production enhancement and …
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Chapter 8 BLAST DESIGN
BLAST DESIGN (Figure 8-2) Staggered pattern (Figure 8-3) Sing (Figure 8-1) Square or rectangular pattern. 114 ... and processing rock and ore. The small difference in the cost of a …
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Understanding Iron Ores and Mining of Iron Ore – IspatGuru
There are two basic surface mining methods designed to extract iron ore from surface deposits. These are open pit and open cut methods. Nearly all the large iron ore mines …
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Selection of the most proper drilling and blasting pattern by …
gested pattern are 2.3 m and 2.6 gr/cm3, respectively. Keywords: Drilling and blasting pattern; Sangan Iron Ore Mine; AHP; TOPSIS; PROMETHEE 1. Introduction Drilling and blasting play …
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Design of controlled blasting (pre-splitting) in Golegohar iron …
ments is a method of defining optimal pattern of pre-splitting (Xu and Peng, 2008; Dai, 2005; Ozer et al., 2013). In this study, pre-splitting is tested in Golegohar ... blasting pattern no. 168 ...
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Blast design for improved performance and reduced surface …
Deeper level iron ore mining at a depth below 800–1,000 m in Western Siberia faces poor ground conditions and heavily complicated geomechanical conditions. Ore extraction involves such …
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BlastHole Drilling Introduction
Open Pit Blast Pattern. Rules of thumb. Burden 25 to 35 hole diameters; Spacing ... It is the dominant method for holes larger than 203 mm (8") diameter. In smaller holes, it is most common in softer rock formations. ... Iron …
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Optimal Blast Design Considering the Effects of …
In the second blasting pattern (square, similar the blasting design pattern used in NCQ quarry), the width of burden equal length of spacing of the blast holes mines at values 4.2 m. In the last …
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Design of controlled blasting (pre-splitting) in …
In this paper, the author also wants to introduce the pre blasting and the method to define blasting parameters to increase the stabilization of Slopes in Tan Cang quarry in Vietnam. View ...
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Mechanism of iron ore blasting fracture using axial
The iron ore used in this study was sourced from the Gongg iron ore deposit in Liaoning province, China, as depicted in Fig. 1. Cylindrical iron ore specimens with a diameter of 50 mm …
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en/112/drill patterns iron ore.md at main
Iron Ore Processing for the Blast Furnace Creating steel from lowgrade iron ore requires a long Nearly 400 of these holes are drilled in a blast pattern.drilling pattern in an iron ore minedrilling …
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An empirical relation to calculate the proper burden in blast …
The above relation was selected for designing and optimizing the blasting pattern. In the used and designed pattern for the southern mass of iron ore mine and according to the …
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Mechanism of iron ore blasting fracture using axial
The axial uncoupling coefficient and air deck effect in blasting significantly influence the effectiveness of rock fragmentation. This study employs a passive confinement …
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Selection of the most proper drilling and blasting pattern by using
This paper aims to select the most proper drilling and blasting pattern for Sangan Iron Mine, Iran. To achieve this, in the first step, rock fragmentation, back break, fly rock, …
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BlastHole Drilling Introduction
It is the dominant method for holes larger than 203 mm (8") diameter. In smaller holes, it is most common in softer rock formations. The drilling principle is to use a high pull down force (weight-on-bit), rotate the drill …
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Final Wall Stability in Metal Open Pit Mines Using Presplit Blasting
Presplit hole pattern design Many formulas and methods for calculating geometric parameters, such as burden, spacing and other parameters, have been developed since the early 1970s. …
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Design of controlled blasting (pre-splitting) in Golegohar iron ore
Design of blast experiments is a method of defining optimal pattern of presplitting (Xu and Peng, 2008; Dai, 2005; Ozer et al., 2013). In this study, pre-splitting is tested in Golegohar iron ore …
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