When do you get toughness from mining

Classic TBC. Classic Theme Thottbot Theme. Post by interloper Am I the only one who thinks blizz must do smth about it, cause now its only useful for tanks and mb pvp? Post by TehTerokkar Then unlearn it and learn something else.

Post by Varaconn My tank enjoys toughness. If it bothers you, yes, learn something else. Do you have a problem that Tailoring doesn't have a tank embroidery?

Post by haggers My tank enjoys toughness. Post by Varaconn The problem is, in the case of Toughness, the stamina would have to be switched to something on use, or the passive weakened in order to balance around having another perk. This would make mining crappy for tanks, and crappy for anyone else, as well. I very much remember when profession specs mattered.

I loved it. In the mining industry time is critical as production depends on the speed of the mining cycle. During the mining process, the time required to re-open access for the next phase of an underground heading is a key point that strongly depends on the ability of the selected ground support technique to promptly ensure the safety of workers.

Fiber reinforced dry-mix shotcrete has been proven to be an efficient and well adapted technique, able to produce a ground support material with the required energy absorption or flexural toughness in a single application phase. In this context, this paper demonstrates the possibility of significantly speeding up the mining process by using a new fiber reinforced dry-mix shotcrete. The new fiber reinforced dry-mix shotcrete is capable of developing flexural toughness in only 24 hours that is equivalent to what is typically achieved after 28 days using current fiber reinforced drymix shotcrete technology.

Shotcrete is often used for ground support when using the drill and blast method or other tunnelling methods. But before re-opening access for the next phase of the underground heading, the applied shotcrete is required to reach a minimum compressive strength and in case of fiber reinforced shotcrete, a minimum flexural toughness energy absorption in order to ensure the safety of the workers going into the heading.

Combined with bolts, the use of conventional fiber reinforced shotcrete becomes an interesting method for ground support as it is applied very soon after excavation and works to stabilize ground movements Bernard E. In this case, the toughness development of fiber reinforced shotcrete becomes an important feature of the material when looking to speedup the mining cycle.

However, early re-entry criteria in underground openings are difficult to ascertain as the load carrying capacity of fiber reinforced shotcrete is usually assessed after 7 or 28 days.

For this reason, re-entry criteria varies from one mining area to another and are usually based on compressive strength requirements. Flexural toughness requirements on fiber reinforced shotcrete are also typically based on evaluation after 28 days. In order to speed up the mining and tunnelling process, King Packaged Materials Company, Burlington, ON, Canada, a specialized company in pre-packaged, pre-blended dry cementitious material, has conducted a testing program to develop a fiber reinforced shotcrete mix that reaches the compressive strength and the flexural toughness required as fast as possible.

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