Yes, very much the same idea. Rollers would be mounted either directly to the track ties, or (in the case of a downward lessening of gradient) to an overhead bar or boom. Stan Lawrence (former manager at Tsable River and now deceased) introduced me to the specific term 'verandah roller', which would have been current in mining jargon around the 1950s, anyway.
When we mapped the old workings of Sage Mine for the Ministry of Mines (see Lynne Bowen's webspace, at
http://www.lynnebowen.ca/three_dollar_dreams.html, for a couple of photos taken during that exercise), we found rollers, rail and haulage-cable in the bottom-most accessible part of the old main slope. The ties had long since rotted away, or been eaten by beetles. So were the cores of the round timber posts along the slope: just their bark shells remained. The rollers were concentrated at a point where the slope had been graded down over a small fault, and thus briefly increased its gradient.
I am not sure that the mine entry at the Jingle Pot Campground was the old 1875 entry. I can speak with a bit of authority on that point as I did a subsurface geological review of the properties near the Jingle Pot interchange, as part of the expropriation appeal process that ensued prior to the construction of the Nanaimo Parkway. We took a big Hitachji track-hoe and dug trenches across any place that looked like it might hold an old mine entry. The only place we did not have the heart to dig up was a lovely rock-garden within a wooded lot at what is now Old Slope Place, on the now cut-off eastern segment of Jingle Pot Road.
We did break into the old workings along the eastern side of the road alignment, finding some nice hard coal in the pillars. It burned just fine in our fireplace in Kitsilano! We also found some nasty waterlogged driveages of the King & Foster operation, on the north side of Tunnel Creek. I rode the hoe's bucket down into one, and was extracted by the hoe's operator as the mine collapsed -- he had the presence of mind to close the hoe's thumb over my head as the debris came raining down.
I plead youth and ignorance, as concerns that episode. Know better, now. ^_^