The effect of blast hole stemming length to rockpile fragmentation at limestone quarries

Cevizci, Halim; Özkahraman, H.T.

doi:10.1016/j.ijrmms.2012.04.005

Cited by 26 publications

(22 citation statements)

References 4 publications

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“…When they are used, the blast hole orifice should also be filled with a certain length of loose solid materials. Plaster stemming [17], non-Newtonian fluid mixture [18], gel stemming [19], and so on have sufficient strength, but the hardening speed is slow and the cost is high.…”

Section: Introductionmentioning

confidence: 99%

“…Since problems such as a large volume of transportation and long loading time have existed in blast pole stemming, the workers would often adopt reverse charge with nonblocking, or they would simply increase the explosive charge in order to save working hours and reduce the labor intensity. Therefore, many problems have occurred, such as reduction of the utilization ratio of explosive energy, serious overexcavation and underexcavation of the surrounding rock, and the poor formation of the section [27][28][29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

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Application and Development of an Environmentally Friendly Blast Hole Plug for Underground Coal Mines

Yang

Zhao

Ning

et al. 2018

Shock and Vibration

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Drilling and blasting technology is one of the main methods for pressure relief in deep mining. The traditional method for blasting hole blockage with clay stemming has many problems, which include a large volume of transportation, excess loading time, and high labor intensity. An environmentally friendly blast hole plug was designed and developed. This method is cheap, closely blocks the hole, is quickly loaded, and is convenient for transportation. The impact test on the plug was carried out using an improved split Hopkinson pressure bar test system, and the industrial test was carried out in underground tunnel of coal mine. The tests results showed that, compared with clay stemming, the new method proposed in this paper could prolong the action time of the detonation gas, prevent premature detonation gas emissions, reduce the unit consumption of explosives, improve the utilization ratio, reduce the labor intensity of workers, and improve the effect of rock blasting with low cost of rock breaking.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Application and Development of an Environmentally Friendly Blast Hole Plug for Underground Coal Mines

Yang

Zhao

Ning

et al. 2018

Shock and Vibration

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“…The stemming of blast hole collars in surface mines with an inert material redirects blasting energy to the rock more efficiently; thus the energy is utilized more effectively in breaking the rock (Cevizci, 2012). In this procedure, high efficiency of blockage is important since the blast gases should not be allowed to escape due to loose stemming material.…”

Section: Introductionmentioning

confidence: 99%

“…For this purpose, quick-setting molding plaster was used as a stemming material. Apart from the work of Cevizci (2012), there is no previous work found in the literature citing the usage of this material. Blasting tests were carried out in quarries by using both the suggested new stemming method and classical stemming material, and performance measurements carried out by image analysis of fragmented rock piles.…”

Section: Introductionmentioning

confidence: 99%

“…Sometimes the plaster plug does not eject from the hole during explosion (Figure 2). Cevizci (2012) carried out blasting tests by changing the blasting parameters of open pit blasts and obtained better results with the plaster stemming method in two different limestone quarries and one clay quarry. These blasting trials were carried out on the same benchmarks and under same rock conditions.…”

Section: Introductionmentioning

confidence: 99%

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A new stemming application for blasting: a case study

Cevizci

2013

Rem: Rev. Esc. Minas

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ResumoAparas e pó de perfuração são, geralmente, utilizados em pedreiras e minas a céu aberto, como o material de tamponamento mais comum, uma vez que são mais facilmente disponíveis nas frentes de desmonte. O tamponamento com gesso mostrou-se de melhor uso do que o com detritos de perfuração, devido ao aumento do confinamento dentro dos furos e melhor utilização da energia explosiva no desmonte do maciço. A principal vantagem do novo método é a redução do custo do desmonte. Em uma pedreira de calcário, os custos de detonação por unidade de volume de rocha desmontada foram reduzidos em 7%. Isto foi obtido através do aumento da carga e distâncias de espaçamento. Além disso, a melhor fragmentação foi obtida, usando-se o método de tamponamento com gesso. Ensaios de detonação mostraram que o uso do gesso produziu material mais fino do que os métodos convencionais. Em ensaios sob mesmas condições, a geração de matacões acima de 20 cm de tamanho foi de 42,6% do total, comparado com 48,7% no método convencional, usando-se espaçadores e tamponamento de aparas de perfuração. Palavras-chave:

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Effect of Hole Stemming Practices on Energy Efficiency of Comminution

Konya¹,

Konya²

2017

Energy Efficiency in the Minerals Industry

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The effect of blast hole stemming length to rockpile fragmentation at limestone quarries

Cited by 26 publications

References 4 publications

Application and Development of an Environmentally Friendly Blast Hole Plug for Underground Coal Mines

Application and Development of an Environmentally Friendly Blast Hole Plug for Underground Coal Mines

A new stemming application for blasting: a case study

Effect of Hole Stemming Practices on Energy Efficiency of Comminution

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