Zobrazeno 1 - 10
of 63
pro vyhledávání: '"Naj Aziz"'
Publikováno v:
Journal of Rock Mechanics and Geotechnical Engineering, Vol 16, Iss 3, Pp 778-789 (2024)
Confining stresses serve as a pivotal determinant in shaping the behavior of grouted rock bolts. Nonetheless, prior investigations have oversimplified the three-dimensional stress state, primarily assuming hydrostatic stress conditions. Under these c
Externí odkaz:
https://doaj.org/article/f65f783afb0d49b487663208467f43e0
Autor:
Ashkan Rastegarmanesh, Ali Mirzaghorbanali, Kevin McDougall, Naj Aziz, Sina Anzanpour, Hadi Nourizadeh, Abbas Taheri
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-9 (2024)
Abstract Pretensioning is one of the most common practices in cable bolting. A barrel and wedge is typically used in the free end of the cable to hold the pretension load. This study investigates the performance of barrel and wedge in cable bolt larg
Externí odkaz:
https://doaj.org/article/220e05294ff14f5eb6a561941772e16d
Publikováno v:
Rudarsko-geološko-naftni Zbornik, Vol 39, Iss 3, Pp 77-94 (2024)
An essential component of guaranteeing the security of underground coal mines is the stability of underground areas. Coal pillars are left in place in underground coal mines to stabilize opened regions where excavations have redistributed in situ str
Externí odkaz:
https://doaj.org/article/ab4b0bee85aa4b638493dde3b69ae1f8
Autor:
Behshad Jodeiri Shokri, Ali Mirzaghorbanali, Kevin McDougall, Warna Karunasena, Hadi Nourizadeh, Shima Entezam, Shahab Hosseini, Naj Aziz
Publikováno v:
Applied Sciences, Vol 14, Iss 21, p 9925 (2024)
This article investigates the application of eXtreme gradient boosting (XGBoost) and hybrid metaheuristics optimisation techniques to predict the axial load bearing capacity of fully grouted rock bolting systems. For this purpose, a comprehensive dat
Externí odkaz:
https://doaj.org/article/5b2676c27c2d4464a4c386f9dd1eacc4
Autor:
Behshad Jodeiri Shokri, Ali Mirzaghorbanali, Hadi Nourizadeh, Kevin McDougall, Warna Karunasena, Naj Aziz, Shima Entezam, Alireza Entezam
Publikováno v:
Applied Sciences, Vol 14, Iss 12, p 5232 (2024)
The main objective of implementing primary ground-controlling methods, such as applying rock bolting systems, is to increase the strength of surrounding rock mass. Among all rock bolting systems, fully grouted rock bolting systems are the most popula
Externí odkaz:
https://doaj.org/article/b4938676942c497092149a3b15f3cf4a
Publikováno v:
Geofluids, Vol 2019 (2019)
This paper presents the results of an evaluation study of gas drainability in the Bulli seam in the Southern Coalfield of the Sydney Basin, NSW, Australia, where the coal seam gas (CSG) contains a high proportion of carbon dioxide (CO2). Historically
Externí odkaz:
https://doaj.org/article/b3b26cdd99f94b3b98064438e9d20257
Autor:
Ashkan Rastegarmanesh, Ali Mirzaghorbanali, Kevin McDougall, Naj Aziz, Sina Anzanpour, Hadi Nourizadeh, Mahdi Moosavi
Publikováno v:
Rock Mechanics and Rock Engineering. 55:5773-5788
With the increased use of cable bolts in mining and civil projects worldwide, it is important to understanding the performance of these support structures in different scenarios. The axial load transfer mechanisms of six cable bolts were investigated
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::434d3cf8de85fc9f711edf905b289a48
https://doi.org/10.1007/s00603-022-02950-4
https://doi.org/10.1007/s00603-022-02950-4
Publikováno v:
Canadian Geotechnical Journal.
In this paper, eight shear tests were carried out utilising a double shear with infilled shear interfaces after determining an appropriate experimental design and modified testing scheme. For this, two rock bolts, 20-tonne and 30-tonne, were tested w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b5f9d4149dc93e56cc0058a266bb4096
https://doi.org/10.1139/cgj-2022-0619
https://doi.org/10.1139/cgj-2022-0619
Autor:
Ashkan Rastegarmanesh, Ali Mirzaghorbanali, Kevin McDougall, Naj Aziz, Sina Anzanpour, Hadi Nourizadeh, Mahdi Moosavi
Publikováno v:
Canadian Geotechnical Journal.
The ease of use and the design flexibility of cable bolts have made them a popular choice for rock support. Cable bolts can be encapsulated with cementitious grout or resin. There is a need to better understand the impact of resins on the behaviour o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a0f6914f855a76f2c3960941961864e3
https://doi.org/10.1139/cgj-2022-0379
https://doi.org/10.1139/cgj-2022-0379
Autor:
Naj Aziz, Ali Mirzaghorbanali, Sina Anzanpour, Ashkan Rastegarmanesh, Saman Khaleghparat, Jan Nemcik, Joung Oh, Guangyao Si
Publikováno v:
Rock Mechanics and Rock Engineering. 55:3919-3937
This paper focuses on the experimental study of shear testing of 15.2 mm, 25 t capacity seven wire cables at zero, 30° and 45° angles using two different shear testing facilities at the University of Wollongong (UOW) and the University of Southern
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::42ec057b0591bc6e8fb576284d89ef42
https://doi.org/10.1007/s00603-022-02847-2
https://doi.org/10.1007/s00603-022-02847-2