Having the pack downloaded, up and running, on your singleplayer world or your server, life in survival gets a lot easier.
Simply crafting the Lumberjack-axe, you are now able to chop down whole trees at once.
Chop one log of a tree and all the other logs drop down as well.
All the information needed to craft yourself the Lumberjack-axe is contained in the manual you get when starting the world or joining a server. Have Fun!
Important files are: the craftingitems_give.mcfunction for all the crafting items ( in the chat: /function game:craftingitems_give.mcfunction), the delete_scores.mcfunction for deleting all scoreboards before deaktivating/deleting the datapack, and the lumberjackaxe_give.mcfunction for getting the Lumberjack Axe