Área - MINEPLANNING 2013

Operational Definition of Three Undercutting
Fronts for The New Mine Level Project
Antonio Madrid, Hugo Constanzo / Codelco Chile – División El Teniente
Summary
i.
ii.
iii.
iv.
Background
Mining Geometries
Undercut Front
Final Comments
Background
New Mine Level Project
 Reservas
:
2.023 Mt
 Área
:
2.045.424 m2
 Ley Cu media :
0,859%
 Ley Mo media :
0,023 %
 Cu Fino :
17,4Mt
TTE 4 Sur
Cota 2.372
TTE 8 FFCC
Cota 1.980
Esmeralda
Cota 2.210
Nuevo Nivel Mina
Cota 1.880
Diablo Regimiento
Cota 2.210
Background
Productive Areas
Teniente Mine
Reservas
Norte
QT
Pipa
Norte
Esmeralda
640m
660m
Fortuna
Puente
210m
150m
Diablo
Regimiento
Ten 4 Sur
230m
Background
Productive Areas Teniente Mine
Main Areas Collapsed in Primary Rock Mass
Reservas
Norte
Esmeralda
Diablo
Regimiento
Ten 4 Sur
Background
Productive Areas Teniente
Mine & Footprint NMLP
Reservas
Norte
Foot Print
PNNM
550m
Esmeralda
Diablo
Regimiento
Ten 4 Sur
Summary
i.
ii.
iii.
iv.
Background
Mining Geometries
Undercut Front
Final Comments
Mine Geometries
Ten 4 South, Year 1994
440m
660m
Mine Geometries
Ten 4 South, Year 2004
440m
Panel I
Panel III
280m
660m
240m
Panel IV
380m
Mine Geometries
Ten 4 South, Year 1991 / Panel I Recovery
Mine Geometries
Ten 4 South, Undercut Front Width
Year 1990
Year 1993
Year 1995
Year 1999
Mine Geometries
Ten 4 South, Year 2007 to 2011 / Panel III Recovery
Area: 9.000 m2
Tonnage Extracted 2013:
4.15 Mton
Mine Geometries
Ten 4 South, Undercut Front Width
Year 2004
Year 2006
Year 2008
Year 2009
Mine Geometries
Ten 4 South, Year 2008 to 2012 / Panel IV Recovery
Area: 18.000 m2
Tonnage Extracted 2013:
7.2 Mton
Tipo de Daño
Fuerte
Porcentaje de
Daño
3%
Moderado
7%
Bueno
90%
Mine Geometries
Esmeralda Mine, Undercut Front Width
Collapses Area
500m
Mine Geometries
Esmeralda Mine, Undercut Front Width
Year 2000
Year 2003
Year 2009
Recovery
Area
Mine Geometries
Esmeralda Mine, Undercut Front Width
Year 2013 / Panel I ESM Panel IV Recorevy
Mine Geometries
Reservas Norte Mine, Undercut Front Width
Year 2000
Year 2009
Year 2004
Year 2013 /
Panel ReNo Recovery
Summary
i.
ii.
iii.
iv.
Background
Mining Geometries
Undercut Front
Final Comments
Damage Map
Límite Daño
Damage Index
C-43
C-41
C-39
C-37
SOCAVON FW
SOCAVON SLOT
C-33
Studies
C-35
Undercut Front
Undercut Front
Damage & Area Rate
Rate of Damaged Area
Damage Extensión (m)
Incorporated Area Rate
Undercut Front Width v/s Damage
Undercut Front Width (m)
Years
Undercut Front
Undercutted v/s Available Area
Available
Area
and Monthly
Production
v/s Abierta
Total Open
Area
Disponible
y Producción
Mensual
v/s Area
TotalArea
,
promedioaverage
mensual por
Familias yand
Sectores
entre
1987 al 2008
monthly
by families
DET DET,
areas,
between
1987-2008
80.000
y = 0,0347x + 56314
Area Disponible [metros]2
70.000
60.000
y = 0,4912x + 15328
50.000
y = 0,2192x + 27914
40.000
30.000
y = 0,8793x
20.000
10.000
Fam. I: 0 a 40.000 m2 de AA.
Fam. II: 40.000 a 50.000 m2 de AA.
Fam. III: 50.000 a 70.000 m2 de AA.
Fam. IV: 70.000 a 100.000 m2 de AA.
Area Abierta [metros]2
Familia I
Familia II
Familia III
Familia IV
FI
FII
FIII
FIV
12
0.
00
0
11
0.
00
0
10
0.
00
0
90
.0
00
80
.0
00
70
.0
00
60
.0
00
50
.0
00
40
.0
00
30
.0
00
20
.0
00
10
.0
00
0
0
Undercut Front
Geomechanics
3 Fronts
2 Fronts
Year 2023
Year 2026
Summary
i.
ii.
iii.
iv.
Background
Mining Geometries
Undercut Front
Final Comments
Final Comments
•
The mining activity developed in the Esmeralda and Reservas Norte mine was able to use undercut fronts of up to
420 m and 305 m respectively before suffering the first collapses.
•
The mining of the different areas in El Teniente has allowed the use of undercutting fronts in the range of 400-660
m, which have suffered some instabilities related to collapses mainly in the central area of them. This has
translated in the definition of annex areas (West and East) that start to develop independent areas between
them, with undercut fronts in the order of 180-250m to the West area and 140-240 m for the East area. These
independent areas have not shown extraction problems or collapses and have solved the semi static undercut
fronts, providing greater productive and incorporation indices.
•
The efficiency productive curve for El Teniente, shows that for an open area of 50,000 m2 or less, there should be
a maximum of 40,000 m2 of available area, that would be associated to a maximum feasible productive area of
27,500 tpd.
•
Based on the lessons learned and the geotechnical conditions present in the New Mine Level area, a design
criteria requires productive areas with high availability levels, that allows the use of decoupled undercut fronts of
around 210 m, with a central pillar in a lower level. With this design and mine planning, it is hoped to assure the
availability of the project and independent fronts that allow obtaining the required production and a more flexible
mining.
New Mine Level Project
Materials Handling & Macrosequence
CARGADOR LHD
JUMBO
EMPERNADOR
JUMBO RADIAL
JUMBO DE AVANCE
PANEL ANDES
CENTRAL
PANEL ANDES
SUR Hw
JUMBO
CARGADOR LHD MINI
MARTILLO
REDUCCION
CARGADOR PICADOR
Nv. HUNDIMIENTO.
COTA 1880
PANEL ANDES
SUR Fw
118.0
ESTACION
DE VACIADO
PANEL ANDES
CENTRAL SUR
Nv. PRODUCCION 1.
COTA 1862
118.0
Nv. PRODUCCION 2
COTA 1844
CHIMENEA
VENTILACION
CHIMENEA
VENTILACION
PIQUE TRASPASO
118.0
SNV. INY. / EXT..
COTA 1826
VENTILADOR
INYECTOR
ESTACION DE VACIADO
VENTILADOR
EXTRACTOR
118.0
BUZON
Nv. ACARREO.
COTA 1808
CAMION
118.0
CHANCADOR
GIRATORIO
Nv. DRENAJE.
COTA 1790
PLANTA COLON
TOLVA
115.0
PORTAL
CONFLUENCIA
A SUPERFICIE
ALIMENTADOR
TUNEL CORREA TRANSPORTE PRINCIPAL
COTA 1675
Operational Definition of Three Undercutting
Fronts for The New Mine Level Project
Antonio Madrid, Hugo Constanzo / Codelco Chile – División El Teniente