Underground hard-rock mining

<p>Underground hard-rock mining refers to various underground <a href="/facts/Mining/g6uDIFab">mining</a> techniques used to excavate "hard" <a href="/facts/Mineral/LkUFbNmv">minerals</a>, usually those containing <a href="/facts/Metal/PT8hNX6R">metals</a>, such as <a href="/facts/Ore/kgc9DssX">ore</a> containing <a href="/facts/Gold/1znknojp">gold</a>, <a href="/facts/Silver/xXe41BGg">silver</a>, <a href="/facts/Iron/QK1JYy8E">iron</a>, <a href="/facts/Copper/I8PEE8oX">copper</a>, <a href="/facts/Zinc/80b1qgk3">zinc</a>, <a href="/facts/Nickel/KwMCHYRP">nickel</a>, <a href="/facts/Tin/obW9mqc3">tin</a>, and <a href="/facts/Lead/EYljasJN">lead</a>. It also involves the same techniques used to excavate ores of <a href="/facts/Gemstone/kHffmvE3">gems</a>, such as <a href="/facts/Diamond/IBUdnd1y">diamonds</a> and <a href="/facts/Ruby/faGnqzW8">rubies</a>. <a href="/facts/Underground_soft-rock_mining/7DrCJqjc">Soft-rock mining</a> refers to the excavation of softer minerals, such as <a href="/facts/Rock_salt/9xEEKKT8">salt</a>, <a href="/facts/Coal/83kV3qxg">coal</a>, and <a href="/facts/Oil_sands/ewYn43lb">oil sands</a>.
</p>

Underground hard-rock mining open-in-new

Underground hard-rock mining