Optimized blasting design for large-scale quarrying based on a 3-D spatial distribution of rock factor

Hyun-Jin, Shim; Ryu, Dong-Woo; Chung, So-Keul; Synn, Joong-Ho; Song, Jae-Joon

doi:10.1016/j.ijrmms.2008.07.006

Cited by 25 publications

(12 citation statements)

References 4 publications

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“…In bench blasting, if the complex blasting parameters are not matched with this blast, there will be toe rocks on the floor and oversize boulder in the muck pile, which may affect the efficiency of blasting operation [1][2][3]. In order to solve these problems, several field and simulation experiments have been proposed [4][5][6], and some measures have been taken, such as reducing blasting burden distance, deepening overdrilling depth, and using high power explosive [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Effect of the Location of the Detonation Initiation Point for Bench Blasting

Liu

Chen

et al. 2015

Shock and Vibration

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Uneven floor and fragmentation play an important role in blasting operations due to the direct effects on the efficiency of hauling and loading. This paper focuses on the influences of initiation position on bench blasting in order to improve blasting effects. The numerical simulations of bench blasting at different initiation points (top, middle, and bottom) are implemented based on secondary development of LS-DYNA with a tensile-compressive damage model. The damage spatial distribution characteristics of different initiation points are compared. The outlines of rock foundation and boulder areas are analyzed with the damage threshold of critical breakage that is ascertained by acoustic characteristic of damage rock mass. Results of the numerical simulations demonstrate that different initiation points make a great influence on the stress and energy distribution in blasting process and induce different blasting effects. Middle initiation turns out to be the best initiation to increase the flatness of the floor and decrease the oversize boulder ratio simultaneously, which will increase the damage areas of the bottom and top regions and give a better blasting effect. Field experiment in Baihetan Station was carried out to validate conclusions of numerical simulation. Research could provide a good reference for the improvement of rock blasting.

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Section: Introductionmentioning

confidence: 99%

Effect of the Location of the Detonation Initiation Point for Bench Blasting

Liu

Chen

et al. 2015

Shock and Vibration

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“…In the mining activities, the prime aim of blasting operation is to achieve a suitable rock fragmentation necessary for subsequent processes such as transportation, crushing, etc. (Chakraborty et al 2004;Crum and Crum 1990;Latham et al 2006;Morin and Ficarazzo 2006;Ozkahraman 2006;Shim et al 2009). In other hand, the explosive energy is not fully used for rock breakage and only 20-30 % of the energy is practically consumed for the assigned purpose and the rest of the energy is exhausted in the form of unwanted phenomena such as ground vibration, air blast, flyrock, backbreak, etc.…”

Section: Introductionmentioning

confidence: 99%

Engineering Geology for Society and Territory - Volume 1

Lollino¹,

Manconi²,

Clague³

et al. 2015

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“…Therefore, blasting design should take into account the findings of rock fragmentation assessment to cut down the mining cost and shorten the work time. Drilling and blasting cost in open pit mines represent 15-20% of the total mining cost [1,2,3]. Apart from the direct costs, blasting efficiency also influences down the line mining costs.…”

Section: Introductionmentioning

confidence: 99%

Firing Patterns and Its Effect on Muckpile Shape Parameters and Fragmentation in Quarry Blasts

Choudhary¹

2013

IJRET

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Proper use of firing pattern vis-à-vis the blast requirements can provide optimal blast performance in terms of fragmentation, throw, wall control etc. This is largely attributed to the importance of firing burden in any blast round. By changing the firing patterns the firing burden, and, thereby the ratio of spacing to burden is also subject to change. Proper initiation timing is as important for fragmentation as the burden, spacing, sub drilling, stemming etc. Simultaneous initiation leads to the problems, such as, coarser fragmentation, blasting of a large number of holes at a given time which leads to the other problems. The present research study which was conducted in three limestone quarries where major problems such as of improper fragmentation, poor wall control, and poor heave characteristics of the muckpile were observed. Designed firing pattern was not able to provide the requisite fragmentation, and, even the throw. Modifications in firing pattern were implemented to obtain the required blast results.

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Optimized blasting design for large-scale quarrying based on a 3-D spatial distribution of rock factor

Cited by 25 publications

References 4 publications

Effect of the Location of the Detonation Initiation Point for Bench Blasting

Effect of the Location of the Detonation Initiation Point for Bench Blasting

Engineering Geology for Society and Territory - Volume 1

Firing Patterns and Its Effect on Muckpile Shape Parameters and Fragmentation in Quarry Blasts

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