Document Type : Original Research Paper

Authors

• kausar Sultan shah ¹
• Naeem Abbas ^{1, 2}
• Li Kegang ²
• Mohd Hazizan bin Mohd Hashim ³
• Hafeez Ur Rehman ^{3, 4}
• Khan Gul Jadoon ¹

¹ Department of Mining Engineering, Karakoram International University (KIU), Gilgit, Pakistan

² Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming, Yunnan, China

³ Strategic Mineral Niche, School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, Engineering Campus, Nibong Tebal, Penang, Malaysia

⁴ Department of Mining Engineering, Baluchistan University of Information Technology, Engineering and Management Sciences, Quetta, Pakistan

Abstract

The rocks in the studied area are prone to deterioration and failure due to frequent exposure to extreme temperature variations and loading conditions. In the context of rock engineering reliability assessment, understanding the energy conversion process in rocks is critical. Therefore, this research work aims to assess the energy characteristics and failure modes of pink and white-black granite subjected to uniaxial compression loading at various temperatures. Samples of pink and white-black granite are heated to a range of temperatures (0 ^°C, 200 ^°C, 400 ^°C, 600 ^°C, 900 ^°C, and 1100 ^°C), and their failure modes and energy characteristics including total energy, elastic energy, and dissipated energy are studied by testing preheated samples under uniaxial compression. The results show that the dissipation energy coefficient initially rises rapidly, and then falls back to its minimum value at the failure stage. The micro-structures of granite rock directly affect its elastic and dissipation energy. Axial splitting failure mode is observed in most of the damaged granite specimens. After heating granite to 600 ^°C, the effect of temperature on the failure mode becomes apparent.

Keywords

• Failure mode
• granite
• dissipated energy
• elastic energy
• axial splitting

20.1001.1.22518592.2023.14.2.8.9