Hard Rock 101: Mechanical Techniques
June 2020 by John Norman
Since we know that the secret to breaking rock is applying force from the inside out (putting tension on the rock), we will be looking at ways we can generate force using human and machine power.
There is reason to believe these stream valleys are still rich with gold, silver and copper.
In processing gold, silver and other valuable ores, the minerals containing the values, such as metallic gold, silver-bearing sulfides or other minerals, must be freed from the surrounding host rock before those valuable minerals can be captured.
Since last year’s articles on explosives for mining, several people have asked for more information about becoming a licensed blaster.
It is not necessary to have a PhD in geology, but you need to know the basics, so that’s what I am going to try to dig into here—the understandable basics of these gigantic gold deposits.
Depending on the ore and if significant sulfides are present, a hard rock miner may be able to get away with simply using a flux to digest the other minerals that may be present.
The small-scale miner has reasonable opportunity to exploit some of these small, rich placer gold deposits.
Options for affordable crushers for small mining operations
The Bawl Mill • Our Readers Say Re: It's Time to Get the Heck Out of China • Ask The Experts - What’s the status of suction gold dredge permitting in California? • Ask The Experts - How do I properly and safely dispose of blasting caps? • Ask The Experts - How much silver per ton does it take to make a mine profitable? • Ask The Experts - How clean do my gold concentrates need to be to pour a gold button or bar? • Ask The Experts - What is the name and model of the old jaw crusher pictured in last month’s issue? • Dredging Tips and Tricks: T-80 Air Compressor Maintenance • Clearing the Nugget Trap with a Detector • Resurrecting an Old Hard Rock Mine—Setting Up the Millsite • Desert Prospecting Yields More Than Just Gold • Memories of Shirttail Creek, Northern California • Indictments Pile Up for Gold Traders • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices