This rubble ramp thrown against Masada was the means by which Lucius Flavius Silva and the Roman Legion X Fretensis gained access to the mesa summit in AD 73-74. An ironclad seige tower was dragged to the top of the ramp and a battering ram was used to breach the perimeter wall. This story, and the subsequent mass suicide of the rebels on the mesa, is told by Josephus in his Jewish War (here is a link to an English translation).
The account of the breach is described by Josephus in this way: The Romans set fire to a wooden wall erected by the rebels to stop the battering ram sitting atop the ramp. The wind blew the fire back toward the siege tower and threatened to undo everything the Romans had so far accomplished. But then "the wind changed into the south, as if it were done by Divine Providence, and blew strongly the contrary way, and carried the flame, and drove it against the wall, which was now on fire through its entire thickness. So the Romans, having now assistance from God, returned to their camp with joy, and resolved to attack their enemies the very next day" (War 7:304).
The narrative functions as the closer for the account of the First Jewish Revolt. For Josephus these rebels are not heroes, but tragic individuals responsible for the destruction of their own country. They fought against God himself and offered testimony to the danger of radical nationalism.
By the way, it is much easier to walk down the ramp than it is to walk up. Just sayin'.