How do you spell Stoped

Available Definitions:
1)  v. i. - A horizontal working forming one of a series, the working faces of which present the appearance of a flight of steps.
2)  v. t. - To excavate in the form of stopes.
3)  v. t. - To fill in with rubbish, as a space from which the ore has been worked out.
4)  p. p. - Alt. of Stopen