Well the farthest Iecer gotten in the mines was level 60 and I did that without food, but here is a few recipies,tricks, and hints to help you get to the 100th floor

RECIPIES

elli leaves- 6 types of burnt food, bodgizer XL, turbojolt XL, knife, frying pan, oven, pot, sugar, salt, vinegar, soy sauce, miso

bodgizer- honey, orange grass, black grass, red magic grass, pot

bodgizer XL- bodgizer, blue grass, mixer

turbojolt- honey, orange grass, white grass, red magic grass, pot

turbojolt XL- turbojolt, green grass, mixer

TRICKS
Theres this cheat where you can reserve your energy well in the mines minning this is how you do it when you go in the mine save your diary and then go looking for the stairs once you find them reload your diary and go striaght to the spot where you found the stairs...it SAVES alot of energy thats what I used to get to level 66 ^^

HINTS
before you go into the mine make sure you have enough food, your energy is full,have enough sleep, and if your getting ores plus jewls make sure you have a basket thats so you have more space for your food in your back-pack

Don't go into the mines when its rainning or snowing because you loose your enegy quicker on those days and having alot of power berries helps give you extra energy as well to get you started I will tell you where theres 3 of them behind the winter mine, giving the harvest godess 10 flowers for 10 days, and giving kappa 10 cucunbers for 10 days ^^ Hope you make it to level 100