Volume 14 (2023)
Volume 13 (2022)
Volume 12 (2021)
Volume 11 (2020)
Volume 10 (2019)
Volume 9 (2018)
Volume 8 (2017)
Volume 7 (2016)
Volume 6 (2015)
Volume 5 (2014)
Volume 4 (2013)
Volume 3 (2012)
Volume 2 (2011)
Volume 1 (2010)
Application of Machine Learning Models for Predicting Rock Fracture Toughness Mode-I and Mode-II

E. Emami Meybodi; Syed Kh. Hussain; M. Fatehi Marji; V. Rasouli

Volume 13, Issue 2 , April 2022, , Pages 465-480


  In this work, the machine learning prediction models are used in order to evaluate the influence of rock macro-parameters (uniaxial compressive strength, tensile strength, and deformation modulus) on the rock fracture toughness related to the micro-parameters of rock. Four different types of machine ...  Read More

Cavity Growth in Underground Coal Gasification Method by Considering Cleat Length and Inclination of Coal with Elasto-Brittle Behavior

M.R. Shahbazi; M. Najafi; M. Fatehi Marji; A. Abdollahipour

Volume 13, Issue 2 , April 2022, , Pages 607-625


  The in-situ coal is converted to the synthetic gas in the process of underground coal gasification (UCG).  In order to increase the rate of in-situ coal combustion in the UCG process, the contact surfaces between the steam, heat, and coal fractures should be raised. Therefore, the number of secondary ...  Read More

Wellbore Trajectory Optimization of an Iranian Oilfield Based on Mud Pressure and Failure Zone

H. Yousefian; M. Fatehi Marji; H. Soltanian; A. Abdollahipour; Y. Pourmazaheri

Volume 11, Issue 1 , January 2020, , Pages 193-220


  Determination of the borehole and fracture initiation positions is the main aim of a borehole stability analysis. A wellbore trajectory optimization with the help of the mud pressure may be unreasonable since the mud pressure can only reflect the degree of difficulty for the initial damage to occur at ...  Read More

Rock Mechanics
Discrete element modeling of explosion-induced fracture extension in jointed rock masses

M. Lak; M. Fatehi Marji; A.R. Yarahamdi Bafghi; A. Abdollahipour

Volume 10, Issue 1 , January 2019, , Pages 125-138


  The explosion process of explosives in a borehole applies a very high pressure on its surrounding rock media. This process can initiate and propagate rock fractures, and finally, may result in the rock fragmentation. Rock fragmentation is mainly caused by the propagation of inherent pre-existing fractures ...  Read More