How to select multiple loops that are on top of each other

many times i need to select front and back loops and currently i alt-LMB on the visible loop (not in xray mode) and then rotate a bit to select the identical loop under, but this is a bit of a pain.

is there a way to select all loops under the mouse, not just the one on top in the view?

thanks

have you tried, after selecting the first, hit ctl num pad +

that select too much, i only want to expand the selection is the plane of the viewport. for example, if i’m in top view, i only want to expand selection in Z