to walk slowly and awkwardly, not lifting your feet much, for example because you are tired, weak, or lazy = shuffle shamble over/past/along etc (shamble (of legs) (16-19 centuries), probably from shamble ( SHAMBLES); probably because of the similarity to table legs)
One of a succession of niches or platforms, one above another, to hold ore which is thrown successively from platform to platform, and thus raised to a higher level