流眼泪
发表于 2025-3-26 23:32:11
Horst D. Simonly performed in a very detailed fashion, the basic information for a structural analysis may usually be determined relatively reliably. A separate chapter is dedicated to stability analyses for caverns in view of the above. The influence of the cavern’s dimensions, in-situ states of stress and the s
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兵团
发表于 2025-3-27 09:01:10
John Scanlonsidered in the excavation design procedure. An associated issue is that, for flat-lying stratiform orebodies, the typical mining method involves entry of personnel into the mined void. The performance of the bed of rock spanning the excavation, i.e. the immediate roof, then assumes particular import
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Ganglion
发表于 2025-3-27 18:42:30
Hans-Martin Wackerletely revised to reflect the notable innovations in mining engineering and the remarkable developments in the science of rock mechanics and the practice of rock engineering that have taken place over the last two decades.. .Based on extensive professional, research and teaching experience, this boo
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Conduit
发表于 2025-3-28 02:51:08
Chris Sander,Reinhard Schneider,Pieter Stouten unimportant, but over the past decades asteroids have been acknowledged to be key players in the Solar System. This view of their starring role even alters the trajectories of spacecraft: NASA’s policy for new978-3-319-81132-1978-3-319-31836-3
有权威
发表于 2025-3-28 06:35:34
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发表于 2025-3-28 13:22:47
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