Volume 15 (2024)
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)
Rock Mechanics
Simulating the hydraulic fracturing mechanism around the hydrocarbon wellbores with emphasizing its effects on the sand production

masoud yazdani; Mohammad Fatehi Marji; Mehdi Najafi; Manouchehr Sanei

Articles in Press, Accepted Manuscript, Available Online from 13 May 2024

https://doi.org/10.22044/jme.2024.14049.2619

Abstract
  Around 70% of the world's hydrocarbon fields are situated in reservoirs containing low-strength rocks, such as sandstone. During the production of hydrocarbons from sandstone reservoirs, sand-sized particles may become dislodged from the formation and enter the hydrocarbon fluid flow. Sand production ...  Read More

Rock Mechanics
Discrete Elements Analysis of Sand Production Mechanism in Oil Well Considering Effects of in-situ Stress and Fluid Pressure

Masoud Yazdani; Mohammad Fatehi Marji; Hamid Soltanian; Mehdi Najafi; Manouchehr Sanei

Volume 15, Issue 4 , October 2024, , Pages 1509-1525

https://doi.org/10.22044/jme.2024.13894.2585

Abstract
  Approximately 70% of the world's hydrocarbon fields are located in reservoirs with low-strength rocks such as sandstone. During the production of hydrocarbons from sandstone reservoirs, sand-sized particles may become dislodged from the formation, and enter the hydrocarbon fluid flow. Sand production ...  Read More

Prediction of Roof Failure in Pre-driven Entries and Selecting a Suitable Type of Recovery Room Method in Longwall Mining

Sajjad Aghababaei; Hossein Jalalifar; Ali Hosseini; Farhad Chinaei; Mehdi Najafi

Volume 15, Issue 1 , January 2024, , Pages 223-237

https://doi.org/10.22044/jme.2023.12787.2321

Abstract
  In this work, two rock engineering system (RES)-based models are presented, the first model to predict the roof failure when a longwall face advances toward a pre-driven recovery room (PDRR) and the second model to select the type of recovery room method for longwall mining. For the first model, an international ...  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

https://doi.org/10.22044/jme.2022.11906.2183

Abstract
  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

Exploitation
Determination of a suitable extraction equipment in mechanized longwall mining in steeply inclined coal seams using fuzzy analytical hierarchy method (Case study: Hamkar coal mine, Iran)

A. Hosseini; M. Najafi; Seyed A. Shojaatlhosseini; R. Rafiee

Volume 8, Issue 3 , July 2017, , Pages 487-499

https://doi.org/10.22044/jme.2017.847

Abstract
  The longwall mining method is one of the most applied methods in extracting low-inclined to high-inclined coal seams. Selection of the most suitable extraction equipment is very important in the economical, safety, and productivity aspects of mining operations. There are a lot of parameters affecting ...  Read More

A boundary element/finite difference analysis of subsidence phenomenon due to underground structures

S. E. Mirsalari; M. Fatehi Marji; J. Gholamnejad; M. Najafi

Volume 8, Issue 2 , April 2017, , Pages 237-253

https://doi.org/10.22044/jme.2016.759

Abstract
  Analysis of the stresses, displacements, and horizontal strains of the ground subsidence due to underground excavation in rocks can be accomplished by means of a hybridized higher order indirect boundary element/finite difference (BE/FD) formulation. A semi-infinite displacement discontinuity field is ...  Read More

Probabilistic analysis of stability of chain pillars in Tabas coal mine in Iran using Monte Carlo simulation

M. Najafi; Seyed M. E. Jalali; F. Sereshki; A. Yarahmadi Bafghi

Volume 7, Issue 1 , January 2016, , Pages 25-35

https://doi.org/10.22044/jme.2016.465

Abstract
  Performing a probabilistic study rather than a determinist one is a relatively easy way to quantify the uncertainty in an engineering design. Due to the complexity and poor accuracy of the statistical moment methods, the Monte Carlo simulation (MCS) method is wildly used in an engineering design. In ...  Read More