I got it once forever ago and if I remember correctly you literally just stumble across them after entering the basement. could've been when you choose to mine though, but I'm almost entirely certain you don't need to start mining or speak to blake to trigger the scene.
editing to ask this, where are you in the story at the moment? cause some of the scenes are locked behind other quests being completed.
wait the sawmill scene? do you mean the one that has a CG with Barrel or the one where the MC fucks him at night? because that one is unlocked by just beating Scar and checking his (Logan's) house after doing the visit at your house from Jester during the night. and on the other thing, that's strange, I can't tell if it's something we're forgetting or just RNG being hell I'm gonna see if I can get the scene on my bottom saves to figure out if I can just trigger it by loading in or if I'm also missing something.
second edit to add, I checked and got the scene literally right away. on this save I'm actually incredibly behind the main story and only have the bareshade expansion, curse of lust, country road, full moon and between worlds event. have you finished any of those?
no I haven't yet cause the scenes weren't triggering on my original save, I'll try to do more of the story progression on a different save to see if it'll unlock those scenes, as the guide and wiki both just say to have completed just the camp scene or the talk to Logan about what happened, not really specifying where in the story you have to be. I'll update you if it works, thanks for the help.
Update: I fully completed the bandit quest and it finally worked on the new save, on my original save, I finished it and they wouldn't happen, so I guess that save was just glitched? Thanks for all your help