What is the best/fastest way to do mining?

What is the fastest way to do mining? Everytime I try and get down to work to build my underground tunnel network I always end up utterly exhausted and famished. It seems it takes days by jackhammer just to fill out a decent room.
Are there more efficient tools I could use?
A vechile mounted heavy duty drill would be nice

There are no better tools I’m aware of but I found the most effective way was (depending on the situation) to take a rollmat/sleeping bag, a few days supply of water and food and just sleep when tired.

what i would like its the removal of the need for items to make a downward level, like instead of a stair just a slope. maybe balancing it with more time complete and more skill needed