TBM FOR MINING APPLICATIONS - Selitunnel...SME 2011 ‐DENVER ‐REMO GRANDORI NO DESIGN EVOLUTION IN TBM FOR MINING IN SINCE 1960’s TBM DESIGN INNOVATION HAS BEEN FOCUSED ON: •SOFT

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Condivisione di obiettivi e traguardi

TBM FOR MINING APPLICATIONS

SME 2011 ‐ DENVER ‐ REMO GRANDORI

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TBM DESIGN EVOLUTION


NO DESIGN EVOLUTION IN TBM FOR MINING IN SINCE 1960’s

TBM DESIGN INNOVATION HAS BEEN FOCUSED ON:•SOFT GROUND SLURRY AND EPB SHIELDED TBMS•SHIELDED TBM FOR MIX ROCK AND SEGMENTAL LINING INSTALL.

HARD ROCK OPEN TBMS REMAINS VIRTUALLY UNCHANGED

NEVER A SPECIFIC TBM FOR MINING APPLICATION WAS DEVELOPED

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IN 2008 SELI DEVELOPED A NEW TYPE OF TBM FOR AN ANGLO AMERICA MINE


THE LOS BRONCHES COPPER MINE IN CHILE

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THE LOS BRONCHES EXPLORATORY TUNNEL


8 KM LONG

REDUCED PORTAL SPACE

MODIFIED ALIGNMENT

ORIGINAL ALIGNMENT

4,5 m bore diameter

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FORESEEN TUNNEL GEOLOGY


•Quartz monzonite for 3.150 m•Andesite for 1.700 m•Rhyodacite porphyry for 1.300 m•Tourmaline breccia for 1.850 m•Chlorite breccia for 100 m•Faults for 25 m

Andesite for 1.700 mRhyodacite porphyry for 1.300 mTourmaline breccia for 1.850 mChlorite breccia for 100 mFaults for 25 m

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DSU COMPACT TBM SYSTEM DESIGN TARGETS


COPE WITH WIDE RANGE OF ROCK AND CONDITIONS

ABLE TO INSTALL AN COMPLETE SUPPORT SYSTEM AS NEAR AS POSSIBLE TO THE FACE (ALL IN L1 SECTION)

INCREASE SAFETY STANDARDS

IMPROVE LOGYSTIC (EASY TO TRANSPORT, FAST ASSEMBLY/DISASSEMLY, REDUCED PORTAL INSTALLATIONS)

REDUCED LABOUR FOR OPERATION AND MAINTENANCE

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INTEGRATED SYSTEM DESIGN


•NEW TBM TYPE

•NEW COMPACT BACKUP DESIGN

•COMPLEMENTARY TUNNEL TRANSPORT SYSTEMS AND LINES

•COMPACT PORTALS INSTALLATION

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DSU COMPACT TBM


FLAT CHD 19” CUTTERS

SHORT CO

NICAL SHI

ELDS

LARGE GRIPPER PADS

GROUND TREATMENTS 360°PATTERN HOLES

ROOF FINGER SHIELD FOR ROCK BOLTS AND STEEL

SETS PREFABRICATED

PANELS

AUXILIARY THRUST TO ADVANCE

THROUGH FAULTS

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DSU COMPACT TBM


AUXILIARY GRIPPERS

LARGE BUCKEST WITH GRILL BARS

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DSU COMPACT TBM

SME 2011 ‐ DENVER ‐ REMO GRANDORI6 M LONG CONICAL SHIELDS

NO STEPS TELESCOPIC JOINT

ROOF AND PROBE DRILLS

STEEL SETS PANELS ERECTOR

300 mm THICK PLATE CHD

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COMPACT BACKUP SYSTEM


ONLY 60 M LONG

SEVEN CONTAINERISED DECKS

TUNNEL CONVEYOR

L1

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PORTAL LOCATION


DIFFICULT ACCESS IN WINTER

MINE TRUCK TRAFFIC

HARD WINTER CLIMATE

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PORTAL INSTALLATIONS


PORTAL INSTALLATIONS

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WINTHER WEATHER


WINTER WEATHER IMPOSED TBM ASSEMBLY AND INSTALLATIONS TO BE LOCATED INSIDE THE TUNNEL

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TBM ASSEMBLY



AUX. THRUST ON STEEL SETS

PANELS

BOLTED STRUCTURES FOR ASS/DISASS. UNDERGROUND

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WINTHER WEATHER


WINTER WEATHER IMPOSED TBM ASSEMBLY AND INSTALLATIONS TO BE LOCATED INSIDE THE TUNNELINSTALLATIONS ENTIRELY UNDERGROUND

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ROCK BOLTS

STEEL SET

PANELS

ROCK SUPPORTING SYSTEM

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SME 2011 ‐ DENVER ‐ REMO GRANDORITBM STARTED TO BORE IN A FAULT AREA

RUNNING BLOCKS IN FRONT OF CHD

RESIN TREATED BLOCKS THROUGH

BUKETS

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WINTH



STEEL PANELS ERECTED THROUGH THE FAULT

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VERY

HARD

ROCK

OVER

300

MPA

TUNNEL ALIGNMENT MOVED TO HIGH COVERS AND BETTER ROCK CONDITIONS

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SOUND

ROCK

FREE

FROM

FRACTURES

SOUND

ROCK

FREE

FROM

FRACTURES

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WATER

INFLOWS

UP TO

300

LT/SEC

WATER

INFLOWS

UP TO

300

LT/SEC

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HIGH PRESSURE WATER INFLOWS FROM

PROBE HOLE

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SME 2011 ‐ DENVER ‐ REMO GRANDORIPUMPING WATER IN THE TUNNEL INVERT

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SME 2011 ‐ DENVER ‐ REMO GRANDORISYSTEMATIC ROCK BURSTS UNDER HIGH COVER

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SME 2011 ‐ DENVER ‐ REMO GRANDORISYSTEMATIC ROCK BURSTS UNDER HIGH COVER

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PERFORMANCES


TBM EXCAVATED 4500 m SO FAR

WAS ABLE TO ADVANCE THROUGH ALL ROCK CONDITIONS

N GOOD HARD ROCK REACHED PEAKS OF 46 m/day AND 575 m/month

AVERAGE ADVANCES UNDER MIX ROCK CONDITIONS ARE IN THE REGION OF 1820 m/day

THESE AVERAGES ARE MORE THAN DOUBLE THAN ANGLO AMERICAN FORECASTS IN SAME ROCK CONDITIONS/DISTRIBUTION

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PERFORMANCES


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SAFETY


SAFETY EQUIPMENT AND PROCEDURES WERE DESIGNED TO COPE WITH STRINGENT ANGLO AMERICAN STANDARDS

2 HOURS PER DAY WERE DEDICATED TO SAFETY TRAINING OF THE TUNNEL CREWS WITH NO PRODUCTION

NO SIGNIFICANT ACCIDENTS OCCURRED DESPITE THE ENCOUNTERED DIFFICULT GROUND CONDITIONS

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CONCLUSIONS


THE DSU COMPACT SYSTEM TBM PROVED TO OUTPERFORMS UNDER SEVERAL POINT OF VIEW IN A MINING ENVIRONMENT

THE LOS BRONCHES MINE IS SATISFIED ABOUT PRODUCTION, SAFETY AND QUALITY OF THE WORKS PERFORMED AND HAS EXTENDED BY ADDITIONAL 3+2=5 KM THE TOTAL TONNEL TO BE BORED BY TBM METHOD

THIS SUCCESS PROVE THAT THERE IS STILL A LOT OF SPACE FOR INNOVATION AND SPECIAL TBM APPLICATIONS FOR MINING

TBM FOR MINING APPLICATIONS - Selitunnel...SME 2011 ‐DENVER ‐REMO GRANDORI NO DESIGN EVOLUTION IN TBM FOR MINING IN SINCE 1960’s TBM DESIGN INNOVATION HAS BEEN FOCUSED ON: •SOFT

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