Development of a model to predict peak particle velocity in a blasting operation

Dehghani, Hesam; Ataee-pour, Majid

doi:10.1016/j.ijrmms.2010.08.005

Cited by 111 publications

(36 citation statements)

References 14 publications

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“…Dimensional analysis is an engineering method used for creating equations that simplify the analysis of complex multivariable systems [17][18][19][20]. Dimensional analysis has its origin in the work of Maxwell, who used the symbols…”

Section: Dimensional Analysismentioning

confidence: 99%

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Prediction of blast-induced flyrock using differential evolution algorithm

Dehghani

Shafaghi

2016

Engineering with Computers

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loading and hauling. Fragments can be thrown beyond the desired pile limit, which is normal but is considered adverse effect of blasting and is called flyrock. Fragments propelled far beyond predefined safety limit are considered security breach and are called wild flyrock [1].Due to high potential to cause damage to machinery and nearby structures and to cause injuries, even fatal, to personnel, flyrock is the most dangerous adverse effect of blasting and this phenomenon is responsible for 28.3 % of the damages and injuries in surface mining activities [2].To prevent flyrock problem, various parameters such as the physico-mechanical properties of rock mass, explosives specifications and geometrical aspects of the blasting pattern should be considered while designing a blasting pattern. For example, flyrock may occur in situations where there is insufficient stemming, too small a burden because of overbreak from the preceding or proceeding blast, planes of weaknesses in rock which reduce resistance to blasting, and finally existence of loose rock fragment on top of the bench [3]. Explosives with high energy can increase the probability of the flyrock. Most of the conventional formula used the TNT strength instead of the explosive strength.To convert this factor, usually, the ballistic mortar test was used (Fig. 1).Since this phenomenon is very dangerous, many researchers trying to establish the flyrock prediction models. Lundborg presented an equation for estimating the flyrock based on the hole diameter and specific charge as follows [4]:where L is the maximum rock projection (m), D is the hole diameter (in) and q is the specific charge (kg/m 3 ). Also, Lundborg et al. established another empirical model based on hole diameter as follows [5]:Abstract Flyrock is an undesirable phenomenon in blasting operations. Due to high potential to cause damage to machinery and nearby structures and to cause injuries, even fatal, to personnel, flyrock is the most dangerous adverse effect of blasting. For controlling and decreasing the effect of this phenomenon, it is necessary to predict it. Because of multiplicity of effective parameters and complexity of interactions among these parameters, empirical methods may not be fully appropriate for flyrock estimation. The scope of this study is to predict flyrock induced by blasting through a novel approach based on the combination of differential evaluation algorithm (DE) and dimensional analysis algorithm (DA). For this purpose, the parameters of 300 blasting operations were accurately recorded and flyrock distances were measured for each operation. In the next stage, two new empirical predictors were developed to predict flyrock distance. The results clearly showed the superiority of the proposed DE-DA model in comparison with the empirical approaches.

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Section: Dimensional Analysismentioning

confidence: 99%

“…According to the π theorem, in a complete set there should exist eight dimensionless terms [19,20]. π and homogeneous algebraic equations can be written by the dimensional matrix as follows:…”

Section: Dimensional Analysis Modelmentioning

confidence: 99%

Prediction of blast-induced flyrock using differential evolution algorithm

Dehghani

Shafaghi

2016

Engineering with Computers

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“…In order to achieve a reasonable fly rock distance for providing safety in mine, decrease of fly rock is one of the main worries of the blasting designers Bajpayee et al, 2002Bajpayee et al, , 2003Bajpayee et al, , 2004aBajpayee et al, , 2004bGhasemi et al, 2012aGhasemi et al, , 2012bKecojevic & Radomsky, 2005;Little & Blair, 2010;Monjezi et al, 2012;Ning, 1999;Rehak et al, 2001;Rezaei et al, 2011;Stojadinović et al, 2011;Tota et al, 2001). In some cases that ground vibration and air blasting has caused some problems in mines designer should predict these phenomena and redesign blasting pattern (Ak et al, 2009;Bakhshandeh Amnieh et al, 2012;Dehghani & Ataee-Pour, 2011;Guosheng et al, 2011;Hudaverdi, 2012;Iphar et al, 2008;Monjezi et al, 2010aShuran & Shujin, 2011).…”

Section: Introductionmentioning

confidence: 99%

Selection of Most Proper Blasting Pattern in Mines Using Linear Assignment Method: Sungun Copper Mine / Wybór Najodpowiedniejszego Schematu Prowadzenia Prac Strzałowych W Kopalni Miedzi Sungun Z Użyciem Metody Przyporządkowania Liniowego

Yari¹,

Bagherpour²,

Jamali³

et al. 2015

Archives of Mining Sciences

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One of the most important operations in mining is blasting. Improper design of blasting pattern will cause technical and safety problems. Considering impact of results of blasting on next steps of mining, correct pattern selection needs a great cautiousness. In selecting of blasting pattern, technical, economical and safety aspects should be considered. Thus, most appropriate pattern selection can be defined as a Multi Attribute Decision Making (MADM) problem. Linear assignment method is one of the very applicable methods in decision making problems. In this paper, this method was used for the first time to evaluate blasting patterns in mine. In this ranking, safety and technical parameters have been considered to evaluate blasting patterns. Finally, blasting pattern with burden of 3.5 m, spacing of 4.5 m, stemming of 3.8 m and hole length of 12.1 m has been presented as the most suitable pattern obtained from linear assignment model for Sungun Copper Mine.

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“…Wherever back break has been the blasting problem in a new bench, the lower amount of back break is considered as the blasting pattern evaluation factor Gate et al 2005;Khandelwal and Monjezi 2012;Monjezi et al 2012;Monjezi and Dehghani 2008;Monjezi et al 2010b). In addition, a few endeavours have been made to diminish ground vibration (Erarslan et al 2008;Ak et al 2009;Hudaverdi 2012;Shuran and Shujin 2011;Bakhshandeh Amnieh et al 2012;Dehghani and Ataee-Pour 2011;Monjezi et al 2010a;Guosheng et al 2011;Ak and Konuk 2008;Iphar et al 2008;Monjezi et al 2011b). The essential issue of these examinations is to recognize stand out of the impact criteria in the blasting operation enhancement.…”

Section: Introductionmentioning

confidence: 99%