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Hydraulic mining used a water cannon (called a monitor) to wash the hillside down and into a huge sluice box which separated the Gold from the dirt and gravel.
Panning, filtering, mining & chemical mining
Yes. All kinds of mining require toil.
In hydraulic mining, powerful jets of water are directed at thick beds of gravel to break them down and wash the residue through lines of sluices designed to separate gold particles.
For coal or many other non-metallic ores, you will need crusher or grinding machines. For metallic ores you need a magnetic separation machine.