Environmentally Friendly Mining Blasting

I had previously wrote about my robot mining idea. I want to add a detail to that idea. Blasting rocks is a common practice in mining to speed the excavation. My robot mining idea required a wind turbine farm to be built in the mining site. Once you have electric supply, the explosives can be manufactured on site. If water is available in the mining area. Water can be separated into hydrogen and oxygen using electrolysis. Which later can be used as explosive with no hazardous by product. If water is not available, atmospheric nitrogen can be liquified and ignited by the oxygen generated from the atmosphere. Again, the resulting blast would have no hazardous by product. This idea also contributes to the goal of minimum logistic supply to the mine site. These approaches are important for rural mining locations and future space mining where material supply is limited.