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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zaCaTeCaS, MexiCO<br />
G u l f o f C a l i f o r n i a<br />
M E X I C O<br />
raise borers. Furthermore, the mine uses<br />
Secoroc drill steel on development <strong>and</strong><br />
production rigs.<br />
Proaño was the first mining operation<br />
in Mexico to employ the Boltec rigs<br />
<strong>and</strong> the Rocket Boomer 281 rig with<br />
USA<br />
Atlas Copco Distribution<br />
& Service Centre<br />
(Caleras)<br />
Madero Mine<br />
Zacatecas<br />
Atlas Copco Mexicana<br />
(Tlalnepantla)<br />
Proaño Mine (Fresnillo)<br />
G U L F O F M E X I C O<br />
Mexico City<br />
Map of Mexico showing Atlas Copco bases <strong>and</strong> mine locations.<br />
Schematic of mine layout at Proaño showing sublevel stoping arrangement.<br />
GUATEMALA<br />
HONDURAS<br />
telescopic advance, which represent<br />
completely new technology.<br />
Likewise, Proaño owns two Diamec<br />
U6 APC deep hole drill rigs, the first<br />
mine in the Americas to use this type<br />
of machine.<br />
During the first three months of 2006,<br />
the entire Atlas Copco mining fleet at<br />
Proaño achieved a physical availability<br />
of 89.5% against the objective of 90%.<br />
Atlas Copco's commitment with<br />
Proaño goes beyond providing new<br />
equipment, <strong>and</strong> a few years ago it was<br />
decided to set up a distribution & service<br />
centre in Caleras, Zacatecas.<br />
<strong>Mining</strong> operations<br />
The underground operations can be ac-<br />
cessed either through two shafts, Central<br />
Shaft <strong>and</strong> San Luis Shaft, or by one of<br />
the mine's several ramps. The mine has<br />
seven levels <strong>and</strong> in Level 425 is the San<br />
Carlos orebody, which currently pro-<br />
duces 67% of production.<br />
Proaño carries out about 40,000 m<br />
of development drilling a year. To support<br />
this work, there are three different<br />
contracting companies: Mincamex, Jo-<br />
margo <strong>and</strong> Mecaxa. All three companies<br />
own Atlas Copco equipment,<br />
mainly Rocket Boomer drill rigs <strong>and</strong><br />
loaders.<br />
The mining method is cut & fill using<br />
upwards <strong>and</strong> downwards drilling. However,<br />
the amount of drilling <strong>and</strong> the hole<br />
diameter have changed over the years.<br />
134 underground mining methods<br />
BELIZE<br />
EL SALVADOR