Roving Mercury Base

The construction of mining bases on Mercury proved a challenge for engineers, due to the extreme range of temperatures from 100 to 700 Kelvin. Habitation in the cold of space, which also applies to the night side of Mercury, is a solved problem. The nuclear generators widely used in modern space travel produce copious amounts of heat, part of which is used to maintain the right temperature for the crew, while the excess is removed with radiators. On the day side of Mercury, however, the intense heat from Sol would need to be somehow cooled away as well.
Over time, many concepts were developed to solve this problem, from reflective shielding to depositing heat into enormous tanks and using it in the night, to building bases entirely underground. None of these ever left the drawing board. Ultimately, the problem was solved by sidestepping it entirely.
The solution to the high day temperatures of Mercury are roving bases, which constantly travel around the planet on large crawlers, allowing them to stay on the night side at all times. Typically, a roving base will spend about half the time stationary, mining the surface with bucket-wheel excavator arms. The rest of the time is spent travelling at speeds of around 10 km/h, leading to an average velocity of around 5 km/h. Over the 4224 hours of a Mercury solar day, the roving base can cover a distance of over 21000 km, enough distance to traverse the 15300 km circumference of the planet with plenty of room for error.