It cannot be fixed with robots. Thousands of R2D2s running into mines with fire extinguishers wouldn't make a dent. These are fires spread throughout many square-miles, cubic-miles, of permeable rock. Quenching them must involve external containment. Massive concrete domes/walls surrounding the burning material. Then you must wait many many years for temperatures to cool. It is a multi-decade project imho.
We can't even get government funding for less CO2-heavy power plants, let alone putting out fires that don't directly harm anyone with an unknown success rate.
