TBM FOR MINING APPLICATIONS
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1 TBM FOR MINING APPLICATIONS
2 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
3 IN 2008 SELI DEVELOPED A NEW TYPE OF TBM FOR AN ANGLO AMERICA MINE THE LOS BRONCHES COPPER MINE IN CHILE
4 THE LOS BRONCHES EXPLORATORY TUNNEL ORIGINAL ALIGNMENT REDUCED PORTAL SPACE MODIFIED ALIGNMENT 8 KM LONG 4,5 m bore diameter
5 Andesite for m Rhyodacite porphyry for m Tourmaline breccia for m Chlorite breccia for 100 m Faults for 25 m FORESEEN TUNNEL GEOLOGY Quartz monzonite for m Andesite for m Rhyodacite porphyry for m Tourmaline breccia for m Chlorite breccia for 100 m Faults for 25 m
6 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
7 INTEGRATED SYSTEM DESIGN NEW TBM TYPE NEW COMPACT BACK UP DESIGN COMPLEMENTARY TUNNEL TRANSPORT SYSTEMS AND LINES COMPACT PORTALS INSTALLATION
8 DSU COMPACT TBM FLAT CHD 19 CUTTERS GROUND TREATMENTS 360 PATTERN HOLES ROOF FINGER SHIELD FOR ROCK BOLTS AND STEEL SETS PREFABRICATED PANELS AUXILIARY THRUST TO ADVANCE THROUGH FAULTS SHORT CONICAL SHIELDS LARGE GRIPPER PADS
9 DSU COMPACT TBM AUXILIARY GRIPPERS LARGE BUCKEST WITH GRILL BARS
10 DSU COMPACT TBM 300 mm THICK PLATE CHD NO STEPS TELESCOPIC JOINT ROOF AND PROBE DRILLS 6 M LONG CONICAL SHIELDS STEEL SETS PANELS ERECTOR
11 COMPACT BACK UP SYSTEM L1 SEVEN CONTAINERISED DECKS ONLY 60 M LONG TUNNEL CONVEYOR
12 PORTAL LOCATION DIFFICULT ACCESS IN WINTER Condivisione HARD di MINE TRUCK TRAFFIC WINTER CLIMATE
13 PORTAL INSTALLATIONS PORTAL INSTALLATIONS
14 WINTHER WEATHER WINTER WEATHER IMPOSED TBM ASSEMBLY AND INSTALLATIO NS TO BE LOCATED INSIDE THE TUNNEL
15 AUX. THRUST ON STEEL SETS PANELS TBM ASSEMBLY WINTER WEATHER IMPOSED TBM ASSEMBLY AND INSTALLATIO NS TO BE LOCATED INSIDE THE TUNNEL BOLTED STRUCTURES FOR ASS/DISASS. UNDERGROUND
16 WINTHER WEATHER WINTER WEATHER IMPOSED TBM ASSEMBLY AND INSTALLATIO NS TO BE LOCATED INSIDE THE TUNNEL INSTALLATIONS ENTIRELY UNDERGROUND
17 ROCK BOLTS ROCK SUPPORTING SYSTEM STEEL SET PANELS
18 RUNNING BLOCKS IN FRONT OF CHD Condivisione di RESIN TREATED THROUGH obiettivi BLOCKS e traguardi BUKETS TBM STARTED TO BORE IN A FAULT AREA
19 WINTH WINTER WEATHER IMPOSED TBM ASSEMBLY AND INSTALLATIO NS TO BE LOCATED INSIDE THE TUNNEL STEEL PANELS ERECTED THROUGH THE FAULT
20 TUNNEL ALIGNMENT MOVED TO HIGH COVERS AND BETTER ROCK CONDITIONS VERY HARD ROCK OVER 300 MPA
21 SOUND ROCK FREE FROM FRACTURE S
22 WATER INFLOWS UP TO 300 LT/SEC
23 HIGH PRESSURE WATER INFLOWS FROM PROBE HOLE
24 PUMPING WATER IN THE TUNNEL INVERT
25 SYSTEMATIC ROCK BURSTS UNDER HIGH COVER
26 SYSTEMATIC ROCK BURSTS UNDER HIGH COVER
27 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 m/day THESE AVERAGES ARE MORE THAN DOUBLE THAN ANGLO AMERICAN FORECASTS IN SAME ROCK CONDITIONS/DISTRIBUTION
28 PERFORMANCES
29 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
30 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 IL FUTURO PERFORMED DI AND SELI 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
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