My issue is with the tone of Hacp's post. It's no less callous than watching flag draped coffins come back from Iraq and Afghanistan and dismissing them since "they knew what they signed up for", or saying the same thing about a police officer killed in the line of duty.
There are risks in every activity, and there are reasonable expectations that soldiers, policemen, and miners have, that the risks they take will be mitigated as much as possible.
Obviously there will be an investigation; if it turns out that the mining company was operating in compliance with safety codes, and this accident was essentially unavoidable, then it is just a tragedy that we may try to learn from. If not, I hope that the managment at the mining company is held directly responsible.