AS Walker had staithes for loading coal onto keel boats "shore" is most likely in my view. Walker Colliery was very close to the river. Old maps show a wagonway from the Byker Hill area to the Tyne at Walker.

Until seeing Walker Colliery on the map just now I had always taken "Walker Shore" simply to be where the coal was delivered from the colliery's own wagons to the boats.

(I haven't trawled through the whole thread either)