Pregledni rad
https://doi.org/10.17794/rgn.2021.1.9
AN INVESTIGATION ON THE EFFECTS OF MICRO-PARAMETERS ON THE STRENGTH PROPERTIES OF ROCK
Behzad Jafari Mohammadabadi
; Department of Mining Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
Kourosh Shahriar
; Department of Mining and Metallurgy Engineering, Amirkabir University of Technology, Tehran, Iran
Hossein Jalalifar
; Department of Petroleum Engineering, Shahid Bahonar University of Kerman, Kerman, Iran
Kaveh Ahangari
; Department of Mining Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
Sažetak
Rocks are formed from particles and the interaction between those particles controls the behaviour of a rock’s mechanical properties. Since it is very important to conduct extensive studies about the relationship between the micro-parameters and macro-parameters of rock, this paper investigates the effects of some micro-parameters on strength properties and the behaviour of cracks in rock. This is carried out by using numerical simulation of an extensive series of Uniaxial Compressive Strength (UCS) and Brazilian Tensile Strength (BTS) tests. The micro-parameters included the particles’ contact modulus, the contact stiff ness ratio, bond cohesion, bond tensile strength, the friction coefficient and the friction angle, and the mechanical properties of chromite rock have been considered as base values of the investigation. Based on the obtained results, it was found that the most important micro-parameters on the behaviour of rock in the compressive state are bond cohesion, bond tensile strength, and the friction coefficient. Also, the bond tensile strength showed the largest effect under tensile conditions. The micro-parameter of bond tensile strength increased the rock tensile strength (up to 5 times), minimized destructive cracks and increased the corresponding strain (almost 2.5 times) during critical stress.
Ključne riječi
Micro-parameter; rock; crack; bond strength; uniaxial compressive strength (UCS); Brazilian tensile strength (BTS); destructive crack.
Hrčak ID:
250786
URI
Datum izdavanja:
22.1.2021.
Posjeta: 1.067 *