Here is the full list of all 76 Mining Mechs achievements. It takes around 8-10 hours to unlock all of the achievements on Windows.
Collect 30 sapphire
Collect 100 jewelry
Collect 100 trash
Collect 100 azurite
Collect 100 gold
Bounce on top of the airship
Collect 100 realgar
Make a deal with the devil
Reach a depth of 1000m
Collect 100 amethyst
Dig 5.000 blocks
Find a Hellstone
Collect 100 diamond
Pass the airlock
Reach a depth of 900m
Collect 100 uranium
Collect 20 emerald
Reach a depth of 800m
Sell for a total value of $1337
Unlock the rhino mech
Find out how high you can fly
Unlock the turtle mech
Pass the plated stone barrier
Unlock the scorpion mech
Unlock the snake mech
Unlock the worm mech
Reach a depth of 700m
Collect diamond ore
Collect 10 treasures
Collect uranium ore
Reach a depth of 600m
Collect 10 ruby
Pass the outpost gate
Reach a depth of 500m
Collect amethyst ore
Collect gold ore
Collect 100 cobalt
Reach a depth of 400m
Unlock the crane mech
Have $1.000.000
Reach a passive income of $100
Collect azurite ore
Reach a depth of 300m
Collect 100 tin
Unlock the kangaroo mech
Dig 2.000 blocks
Collect a ruby gem
Deliver 1000 dirt
Have $100k cash
Collect an emerald gem
Sell $10k worth of ore at once
Reach a depth of 200m
Collect 100 silver
Use a booster
Collect realgar ore
Get a mech to max level
Dig 1000 blocks
Collect 100 copper
Reach a depth of 100m
Collect a sapphire gem
Collect cobalt ore
Use a teleporter
Find a treasure chest
Use confetti
Unlock the beetle mech
Collect jewelry
Reach mech level 3
Collect tin ore
Find cheese
Collect trash
Collect copper ore
Connect your first mine
Use an explosive
Complete the Tutorial
Collect silver ore