Zobrazeno 1 - 10
of 23
pro vyhledávání: '"A.J.S. (Sam) Spearing"'
Publikováno v:
International Journal of Mining Science and Technology, Vol 30, Iss 3, Pp 279-286 (2020)
Proper design of rock bolt support in underground mines is critical to avoid incidents, accidents and loss of production. The traditional design approach only considers the axial (tensile) capacity and this is clearly not the situation in situ, where
Externí odkaz:
https://doaj.org/article/4ca171d42b9a4a759857f42be886fa89
Publikováno v:
International Journal of Mining Science and Technology, Vol 30, Iss 2, Pp 167-177 (2020)
Rock bolts are subjected to different loading conditions along their lengths such as axial, bending, and/or shear forces, which can cause failure at lower loads than those considered for design purposes. The common existing methodologies do not consi
Externí odkaz:
https://doaj.org/article/fc5e4bdaad3c416a9b6b73fb35101cdd
Publikováno v:
Frontiers in Materials, Vol 8 (2021)
The accumulated damage of the surrounding rocks induced by the existing coal mining activities (such as excavation and extraction) is the initial mechanical background of the rock and coal for the further mining operations. An energy-based Cumulative
Externí odkaz:
https://doaj.org/article/5dd9cd805c7a427ab09cc245150a06af
Publikováno v:
International Journal of Mining Science and Technology, Vol 27, Iss 1, Pp 17-27 (2017)
Aiming to address the following major engineering issues faced by the Pingdingshan No. 12 mine: (1) difficulty in implementing auxiliary lifting because of its depth (i.e., beyond 1000 m); (2) highly gassy main coal seam with low permeability; (3) un
Externí odkaz:
https://doaj.org/article/3856a792412746f3a9ecf015d9bece45
Autor:
Dawid Szurgacz, Sergey Zhironkin, Stefan Vöth, Jiří Pokorný, A.J.S. (Sam) Spearing, Michal Cehlár, Marta Stempniak, Leszek Sobik
Publikováno v:
Energies, Vol 14, Iss 11, p 3258 (2021)
The paper discusses the results of a study carried out to determine the thermal condition of a conveyor power unit using a thermal imaging camera. The tests covered conveyors in the main haulage system carrying coal from a longwall. The measurements
Externí odkaz:
https://doaj.org/article/bf467444530441d1b7c04569db4c8886
