Mining_Methods_UnderGround_Mining - Mining and Blasting
Mining_Methods_UnderGround_Mining - Mining and Blasting
Mining_Methods_UnderGround_Mining - Mining and Blasting
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BOxHOle BOring aT el TenienTe<br />
input to future development of boxhole<br />
boring technology. With production re-<br />
sults exceeding expectations, it has also<br />
proved to be a new milestone in the ap-<br />
plication of boxhole boring machines.<br />
acknowledgement<br />
Atlas Copco is grateful to the management<br />
<strong>and</strong> staff at El Teniente for their<br />
help <strong>and</strong> assistance with this article.<br />
Robbins 53RH-EX under test.<br />
Rock Type Composition Density UCS Young’s Poisson’s<br />
[%] [ton/m 3] [MPa] Modulus Ratio<br />
[MPa] [---]<br />
Andesite Fw 36 2.75 100 55 0.12<br />
Andesite Hw 24 2.75 125 55 0.17<br />
Anhydrite Breccha 20 2.70 115 55 0.17<br />
Andesite Breccha 12 2.70 100 50 0.12<br />
Diorite 8 2.75 140 60 0.15<br />
Rock properties at El Teniente.<br />
96 underground mining methods