Usually I do it this way:
In your project,
Duplicate the sequence and move it to a new bin, I usually name this bin CONS.
Delete the video tracks and activate all the audio tracks. Select the sequence in the bin and then Export. In the settings, do OMF2, consolidate and embed media, and whatever other settings may apply to your audio person…transcode to sample rate, convert ot WAV or AIF, etcetera. You’ll need to pick the drive location to consolidate to, then pick the location and the name you’ll be saving the OMF file to.
The Avid will then do its thing, and you’ll end up with one big file name.omf to give to the audio mixer.
Once you hear the file worked for your audio person and they have what they need, open that CONS bin back up and you can safely delete everything in it – media included. Your original sequence with video will remain untouched and intact, ready for color correction, titles, letterboxing…