Mine exploring is like scuba diving. Buy the gear, do it yourself, you're taking a very large risk with your life. It's basically what I did to learn mine exploring. Like anything else, there's a safe way and a stupid way.
You go in with one flashlight all excited like a school kid, you'll die eventually. Look at the gear that Underground Mine Explorers wear on their channel. Full climbing gear. Helmets. Multiple light sources. Gas meter. Never go alone. Always take a pistol. Know how to perform self-rescue first aid. Understand survival techniques in the desert. Etc.
Had I heeded the advice and stayed out of mines, Period Six Mining wouldn't exist and we wouldn't be sitting on a not-so-small fortune.
Can it kill you? For sure. It's your choice to go into them for a measured risk at the end of the day.
I never use my Garrett ATX in the mines. Spending the time to learn the geology is more important. A GB2 is pretty good to have around though.