Zobrazeno 1 - 10
of 37
pro vyhledávání: '"Hamid Chakeri"'
Publikováno v:
Heliyon, Vol 10, Iss 17, Pp e37148- (2024)
One of the essential and practical issues on TBM performance is the wear during the excavation process of abrasive and resistant rock. The wear of the disc cutter, which is caused by the gradual and uniform reduction of the diameter of the disc cutte
Externí odkaz:
https://doaj.org/article/28c95ad817a74c21a23c2f219eba80b3
Publikováno v:
Rudarsko-geološko-naftni Zbornik, Vol 39, Iss 2, Pp 63-74 (2024)
Nowadays, the use of Tunnel Boring Machines (TBM) in tunnelling has increased in urban environments. One of the effective parameters in the excavation process is the use of grout behind the segments to prevent ground settlement and penetration into t
Externí odkaz:
https://doaj.org/article/51c8c78fb83f4d37aa58bbde37a7246a
Autor:
Samaneh Khodaee Ashestani, Hamid Chakeri, Mohammad Darbor, Erfan Khoshzaher, Seyyed Shahab Eddin Bazargan
Publikováno v:
Analytical and Numerical Methods in Mining Engineering, Vol 13, Iss 37, Pp 1-9 (2023)
In this study, the penetration rate of the excavation machine in Tabriz Metro Line 2 using geotechnical parameters and neural networks is estimated. For this purpose, through comprehensive analysis, including borehole drilling, field and laboratory t
Externí odkaz:
https://doaj.org/article/3114f37e7f7c4f709fe18a9adfda6997
Publikováno v:
Heliyon, Vol 9, Iss 12, Pp e22640- (2023)
In coarse-grained soils, the reduction of soil permeability via conditioning can effectively prevent groundwater from entering the chamber, thus providing better tunnel face control and ultimately preventing excessive settlements of the surface. In t
Externí odkaz:
https://doaj.org/article/d950aa13c9c240fabf2c565bd5bcd6e3
Publikováno v:
Rudarsko-geološko-naftni Zbornik, Vol 38, Iss 2, Pp 65-74 (2023)
Clogging during excavation is one of the common problems in mechanized excavation. Among the influential factors in clogging of the cutter head, we can mention the percentage of fine soil particles (under 200 mesh sieve), soil moisture, and soil type
Externí odkaz:
https://doaj.org/article/0c9db43bb83649e3aaeb96bca4cd8489
Publikováno v:
Rudarsko-geološko-naftni Zbornik, Vol 38, Iss 3, Pp 55-63 (2023)
The lining system, used in tunnel boring machines, is made of precast concrete segments. The use of steel fibers in this kind of support system can not only decrease production time and costs but also can improve compressive, tensile as well as flexu
Externí odkaz:
https://doaj.org/article/367afdb0df404f09aa855b8d9f958217
Publikováno v:
Rudarsko-geološko-naftni Zbornik, Vol 38, Iss 5, Pp 79-86 (2023)
Penetration rate is one of the most important parameters in determining excavation time in tunnelling operations. Providing a prediction model or a mathematical relationship can give a better understanding of this issue. A mathematical equation betwe
Externí odkaz:
https://doaj.org/article/bcf8293c86634f9fb0fc306d5fa9fb0b
Publikováno v:
Analytical and Numerical Methods in Mining Engineering, Vol 12, Iss 33, Pp 55-63 (2022)
The performance of mechanized excavation depends on the soil abrasivity and the resistance of cutting tools against wear. The wear has a negative effect on excavation machine parameters, such as penetration rate, and reduces the machine's efficiency.
Externí odkaz:
https://doaj.org/article/7ece257c747747ffaa96fefc58ce3f4f
Publikováno v:
مجله مدل سازی در مهندسی, Vol 17, Iss 58, Pp 41-53 (2019)
Due to the development of metro lines, always the maintenance of buildings of injuries in urban environments is important, therefore, investigation of the surface settlement of the tunnel is undeniable. Several researchers have yet studied the ground
Externí odkaz:
https://doaj.org/article/700daa87353249c0ad9f2d9fde495f5a
Publikováno v:
Mining of Mineral Deposits. 16:47-55
Purpose. The study of stress distribution within an elastic semi-infinite material under the action of an external loading is of great importance in the theory of elasticity. In most cases, the lack of knowledge about the stress distribution within a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7e0b2a57283514c998840d48ddd9d16b
https://doi.org/10.33271/mining16.04.047
https://doi.org/10.33271/mining16.04.047