EcotecManiac is pretty much spot on.
I have worked in both underground metalliferous as a mining engineer and miner, so I will be talking about underground mining positions here.
Decide in what type of mine you want to work, coal or hard rock. Coal usually pays more with less hours of work, but that is slowly changing. Hard rock miners are quickly catching up.
If you want to earn good money and not stand in the stinking hot sun all day, go for an underground mine.
I have a generic underground coal induction, it took around 2 weeks to complete. It was paid by the company, but I think it costs a couple of grand if you are going to pay for it by yourself.
NSW metalliferous mines do not require a generic induction like the coal mines, just a site specific one. Therefore, underground metalliferous mines are easier to get into, if you are prepared to live in the bush.
Most mines are turning towards a 12 hour shift, 2 days, 2 nights, then 4 days off. Most coal mines near the coast still run the 5 day week, 8-12 hours a day.
In terms of working conditions, hardrock is cleaner but a lot hotter underground than coal. It is not uncommon for temperatures to exceed 30 degrees, with less than 5 m/s air velocity, and close to 100% humidity.
With pay, it will depend whether you work for the mining company, or a contractor. If you work for a mining company, they may have some collective agreement that specifies you will be on trainee wages for 6 months before progressing to full wages. This is usually around $60k for both metalliferous and coal. If you work for a contractor, you will most likely be on full rates straight away. You will be clearing around $1200-1500 a week in underground coal.
As a guide for full rates where I worked for various positions:
Metalliferous:
- Truck driver ~ $84,000 pa
- Jumbo operator ~ $115,000 pa
- Mining engineer ~ $85,000 - $140,000
- Mine manager ~ $200,000
- General manager ~ $300,000
Coal:
- Miner ~ $90,000 pa
- Deputy ~ $130,000 pa
- Undermanager ~ $130,000 pa
- Mining engineer ~ Same as metalliferous
- Mine manager ~ Same as metalliferous
- General manager ~ Same as metalliferous
These rates will vary with the location of the mine and the state of the industry.
Hope this helps.