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Mining-geological-petroleum engineering bulletin, Vol. 20 No. 1, 2008

Original scientific paper

IMPACT OF ROCK HARDNESS ON FRAGMENTATION BY HYDRAULIC HAMMER AND CRUSHING IN JAW CRUSHER

Trpimir Kujundžić
Gordan Bedeković
Dalibor Kuhinek
Tomislav Korman

Fulltext: english, pdf (998 KB) pages 83-90 downloads: 3.315* cite
APA 6th Edition
Kujundžić, T., Bedeković, G., Kuhinek, D. & Korman, T. (2008). IMPACT OF ROCK HARDNESS ON FRAGMENTATION BY HYDRAULIC HAMMER AND CRUSHING IN JAW CRUSHER. Rudarsko-geološko-naftni zbornik, 20 (1), 83-90. Retrieved from https://hrcak.srce.hr/30485
MLA 8th Edition
Kujundžić, Trpimir, et al. "IMPACT OF ROCK HARDNESS ON FRAGMENTATION BY HYDRAULIC HAMMER AND CRUSHING IN JAW CRUSHER." Rudarsko-geološko-naftni zbornik, vol. 20, no. 1, 2008, pp. 83-90. https://hrcak.srce.hr/30485. Accessed 25 May 2019.
Chicago 17th Edition
Kujundžić, Trpimir, Gordan Bedeković, Dalibor Kuhinek and Tomislav Korman. "IMPACT OF ROCK HARDNESS ON FRAGMENTATION BY HYDRAULIC HAMMER AND CRUSHING IN JAW CRUSHER." Rudarsko-geološko-naftni zbornik 20, no. 1 (2008): 83-90. https://hrcak.srce.hr/30485
Harvard
Kujundžić, T., et al. (2008). 'IMPACT OF ROCK HARDNESS ON FRAGMENTATION BY HYDRAULIC HAMMER AND CRUSHING IN JAW CRUSHER', Rudarsko-geološko-naftni zbornik, 20(1), pp. 83-90. Available at: https://hrcak.srce.hr/30485 (Accessed 25 May 2019)
Vancouver
Kujundžić T, Bedeković G, Kuhinek D, Korman T. IMPACT OF ROCK HARDNESS ON FRAGMENTATION BY HYDRAULIC HAMMER AND CRUSHING IN JAW CRUSHER. Rudarsko-geološko-naftni zbornik [Internet]. 2008 [cited 2019 May 25];20(1):83-90. Available from: https://hrcak.srce.hr/30485
IEEE
T. Kujundžić, G. Bedeković, D. Kuhinek and T. Korman, "IMPACT OF ROCK HARDNESS ON FRAGMENTATION BY HYDRAULIC HAMMER AND CRUSHING IN JAW CRUSHER", Rudarsko-geološko-naftni zbornik, vol.20, no. 1, pp. 83-90, 2008. [Online]. Available: https://hrcak.srce.hr/30485. [Accessed: 25 May 2019]

Abstracts
The physical and mechanical characteristics of intact rocks depend on the way of their formation, sustained deformations and the process of wearing a specific rock has been exposed to. These characteristics have a rather high influence on the technological process of extraction and dressing of mineral raw materials. However, the mechanical characteristics of rocks due to use of explosives for their extraction in the open pit have a more significant impact. The rock blocks extracted by blasting which are larger than the opening of the primary crusher are usually fragmented by hydraulic hammer. The paper presents the results of the testing of impact of rock hardness on fragmentation of rocks by means of hydraulic hammer and during crushing in jaw crusher. The testing was carried out on the rock samples from five quarries. According to the obtained results the hardness has a considerably larger impact on the fragmentation energy by hydraulic hammer than on the crushing energy in jaw crusher.

Keywords
mining; rock mechanics; physical and mechanical characteristics; Schmidt rebound hardness; crushing; hydraulic hammer; jaw crusher; energy

Hrčak ID: 30485

URI
https://hrcak.srce.hr/30485

[croatian]

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