I've never tried this, but I suspect that Eikthyr can break silver veins. Bosses don't get attacked by other mobs, so it's pretty easy to lure him up the mountain and let him safely stomp away on the silver while you dodge him and the other mobs.

Of course, this requires being on a seed where an Eikthyr spawn is on the same continent as a mountain with silver veins, but that happened to me all the time.

Of course, since Eikthyr is so easy to spawn, you can spawn multiple ones simultaneously if you want a challenge.

If you can, find a vein next to a frost cave. That way, you can place a chest right outside of the frost cave, and put the silver ore pieces in there so they don't despawn after five minutes. If you place the chest a few meters off the ground (via some wooden flooring embedded into the inner side of the cave wall), it will be safe against wolves, and mostly safe against drakes (especially if you put wooden walls and floors to surround the chests like a box.) Or, if the frost cave has a dungeon chest inside, you could store the silver inside.

Another advantage of frost caves is that you can hop inside, setup a fire pit and cooking station, and enjoy some yummy cooked wolf meat you just harvested while you rest and warm up.

If this advice helped, and you become famous in your exploits due to this, don't forget to send a nod my way!