Scifi mining colonist area

A group of miners and engineers crashlanded close to this area. Resourceful as they were, they quickly found a way to use these small yakhchals as buildings by scraping the materials from the spaceship. The colonists found crystals in the underground rocks and as such could upgrade their livinghood, but they still kept the buildings as they were within the yakhchals. They have yet to discover if and why the area was left and who long ago lived in these parts. Fully equipt with communication, defences and other livinghood as well as mining equipment.