Evaluation brittleness indices of rocks, implication for estimating their toughness modulus

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karrari Seyed sajjad; HEYDARI MOJTABA; KHADEMI HAMIDI JAFAR; Sharifi Tashnizi Ebrahim

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Journal: ENGINEERING GEOLOGY Year:2020 | Volume:13 | Issue:3 Page(s): 51-65

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Information Journal Paper

Title

Evaluation brittleness indices of rocks, implication for estimating their toughness modulus

Author(s)

karrari Seyed sajjad | HEYDARI MOJTABA | KHADEMI HAMIDI JAFAR | Sharifi Tashnizi Ebrahim | Issue Writer Certificate

Keywords

brittleness

modulus of toughness

specific energy

Glass tunnel

Abstract

brittleness and modulus of toughness are among the most important inherent properties of rock, which are determinative for rock excavation operations. In this study, mechanical properties of granite, granodiorite, dolomite, hornfels and marble were studied in the area of Glass water supply tunnel near the Naghadeh city (NW Iran). The stress-strain curve area and rocks strength properties were applied to calculate 13 brittleness indices and modulus of toughness. Statistic relationships between brittleness indices and toughness of modulus suggest strong correlation between B3 brittleness index (R2= 0. 83 and RMSE= 5. 46 coefficients) and B4 brittleness index (R2= 0. 83 and RMSE= 3. 85) respectively with modulus of toughness. The statistical relationship between modulus of toughness and specific energy indicates a strong correlation (R2= 0. 85). The modulus of toughness and brittleness are useful parameters for estimating specific energy of rock cutting. Since the modulus of toughness increases with specific energy of rock cutting, it enabled us to estimate the specific energy of rock cutting.

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APA: Copy

karrari, Seyed sajjad, HEYDARI, MOJTABA, KHADEMI HAMIDI, JAFAR, & Sharifi Tashnizi, Ebrahim. (2020). Evaluation brittleness indices of rocks, implication for estimating their toughness modulus. ENGINEERING GEOLOGY, 13(3 ), 51-65. SID. https://sid.ir/paper/956647/en

Vancouver: Copy

karrari Seyed sajjad, HEYDARI MOJTABA, KHADEMI HAMIDI JAFAR, Sharifi Tashnizi Ebrahim. Evaluation brittleness indices of rocks, implication for estimating their toughness modulus. ENGINEERING GEOLOGY[Internet]. 2020;13(3 ):51-65. Available from: https://sid.ir/paper/956647/en

IEEE: Copy

Seyed sajjad karrari, MOJTABA HEYDARI, JAFAR KHADEMI HAMIDI, and Ebrahim Sharifi Tashnizi, “Evaluation brittleness indices of rocks, implication for estimating their toughness modulus,” ENGINEERING GEOLOGY, vol. 13, no. 3 , pp. 51–65, 2020, [Online]. Available: https://sid.ir/paper/956647/en

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