The general rule for underground coal mines, rule 29.1, prohibits unauthorized aluminum alloys underground. A fire spark can occur if some aluminum alloys strike a steel object. I do not think that using aluminum equipment is wise as it is a soft metal and thus hard crust of the Earth might destroy the equipment. underground mining is not at all an easy task as tough minerals have to be extracted and crushed underground. other than this there are multiple reasons why aluminum is highly degraded for underground mining.

• Aluminum fabrication isn't for the faint-hearted, as using low melting heat and melting process means that aluminum does tend to create a mess as it can build up in the wheels during the grinding process underground.
• Sensitive to heat and can get deteriorated within high temperatures
• They are the effective conductors of heat and electricity which might be harmful to the miners.

In my opinion, tungsten carbide mining picks are a better option because they have a tough material for rotating the mineral resources and an easy extraction. It can withstand the hardest substance as well. They are very helpful for crushing and milling purposes. It depends on the intensity of how deep your mining is and what sort of mineral you actually want to extract. At times aluminum-made equipment is also helpful but if you want equipment for a bigger scale you should go with tungsten carbide or any other iron or steel mining picks.