12th Annual Longwall Conference Design and Concept of Longwall Top Coal Caving from Austar Coalmine to North Goonyella Coa...
Introduction 
17 October 2013 
2 
Speaker 
Steven Chandler 
• Initial Longwall Top Coal Caving kit at Austar Coalmine 
•Ph...
Initial LTCC at Austar Coalmine 
17 October 2013 
3 
Design for the Austar 2 leg shield was developed in China by the Yanz...
Initial LTCC at Austar Coalmine 
17 October 2013 
4 
•Greta Seam Coal Measures 
–5.5m – 7m thick 
–low strength (5 - 8MPa)...
Initial LTCC at Austar Coalmine 
17 October 2013 
5 
•LTCC Kit had to be down rated 
The Drift is the largest constraint o...
Initial LTCC at Austar Coalmine 
17 October 2013 
6 
MG ROADWAY SUPPORT 
REAR AFC DISCHARGE 
FACE SHIELD 
FRONT AFC 
CRUSH...
Initial LTCC at Austar Coalmine 
17 October 2013 
7
Initial LTCC at Austar Coalmine 
17 October 2013 
8 
•EL 2000 Shearer 
•540 kW AFC Motors with KP 45 class CSTs Chain spee...
Phase 2 LTCC at Austar Coalmine 
17 October 2013 
9 
The opportunity for this was the re-handing of the Kit for Area 2 
Im...
Phase 2 LTCC at Austar Coalmine 
17 October 2013 
10
Phase 2 LTCC at Austar Coalmine 
17 October 2013 
11
Phase 2 LTCC at Austar Coalmine 
17 October 2013 
12
Phase 2 LTCC at Austar Coalmine 
17 October 2013 
13
Phase 3 of the LTCC North Goonyella Coalmine 
17 October 2013 
14 
•The Yancoal / Peabody LTCC project provided to opportu...
Phase 3 of the LTCC North Goonyella Coalmine 
17 October 2013 
15 
New equipment design to improve the efficiency of the L...
Phase 3 of the LTCC North Goonyella Coalmine 
17 October 2013 
16 
Due to the difficult Middle Goonyella seam the Run of f...
Phase 3 of the LTCC North Goonyella Coalmine 
17 October 2013 
17 
North Goonyella Mine Run of face shield 
Austar Mine Ru...
Phase 3 of the LTCC North Goonyella Coalmine 
17 October 2013 
18
Phase 3 of the LTCC North Goonyella Coalmine 
17 October 2013 
19
Phase 3 of the LTCC North Goonyella Coalmine 
17 October 2013 
20
Phase 3 of the LTCC North Goonyella Coalmine 
17 October 2013 
21 
•Tons per metre /Shear = 2512 tons 
•Sheared Coal = 154...
Phase 4 ( proposed) LTCC at Austar Coalmine 
17 October 2013 
22 
•Replacement of the 6 leg shield with the 4 leg shield
Phase 4 ( proposed) LTCC at Austar Coalmine 
17 October 2013 
23
Future Development of LTCC Equipment 
17 October 2013 
24 
•Reduce the Length of the Rear Tail gate Drive unit 
•Design Wa...
Conclusion 
17 October 2013 
25 
•Australian coal companies need to embrace this concept 
•Maximize Resource Recovery 
•Ne...
Upcoming SlideShare
Loading in …5
×

Steven chandler, yancoal technology development

596 views

Published on

0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
596
On SlideShare
0
From Embeds
0
Number of Embeds
1
Actions
Shares
0
Downloads
7
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Steven chandler, yancoal technology development

  1. 1. 12th Annual Longwall Conference Design and Concept of Longwall Top Coal Caving from Austar Coalmine to North Goonyella Coalmine
  2. 2. Introduction 17 October 2013 2 Speaker Steven Chandler • Initial Longwall Top Coal Caving kit at Austar Coalmine •Phase 2 Longwall Top Coal Caving kit at Austar Coalmine •Phase 3 Longwall Top Coal Caving Kit North Goonyella Coalmine •Phase 4 ( Proposed ) at Austar Coalmine •Future Developments of LTCC in Australia
  3. 3. Initial LTCC at Austar Coalmine 17 October 2013 3 Design for the Austar 2 leg shield was developed in China by the Yanzhou Mining Company ( Part of the Yankuang Group ) Yankuang Group owned the patent for the 2 leg LTCC Shield Yankuang Group and DBT developed the 2 leg caving shield and manufactured to DBT Standard Yankuang purchased Austar Coalmine to Introduce LTCC System of mining to the western world Austar face first full face of 2 leg caving shields in the world
  4. 4. Initial LTCC at Austar Coalmine 17 October 2013 4 •Greta Seam Coal Measures –5.5m – 7m thick –low strength (5 - 8MPa) –Immediate 15m of roof laminated (20-60MPa) •Immediate floor soft mudstone (20MPa) •Geotechnical Issues –seam highly cleated and jointed –inseam shear zones –High horizontal stresses (40-50MPa) •Operational Issues –1m of coal in the floor on development –LTCC requires 8.5m to 9.5m wide installation roadway
  5. 5. Initial LTCC at Austar Coalmine 17 October 2013 5 •LTCC Kit had to be down rated The Drift is the largest constraint on the capacity of the mine •The same drift infrastructure is still operating today •Drift belt capacity 1000t/hr •Maximum load for drift winder 54 tonnes •Envelope for drift transport 3250mm x 2400mm •Caterpillar ( DBT then Bucyrus ) & Yancoal worked closely with the design of the equipment to allow it to be stripped into manageable size units •Selecting and educating the Longwall crews to extract the above horizon .
  6. 6. Initial LTCC at Austar Coalmine 17 October 2013 6 MG ROADWAY SUPPORT REAR AFC DISCHARGE FACE SHIELD FRONT AFC CRUSHER BSL
  7. 7. Initial LTCC at Austar Coalmine 17 October 2013 7
  8. 8. Initial LTCC at Austar Coalmine 17 October 2013 8 •EL 2000 Shearer •540 kW AFC Motors with KP 45 class CSTs Chain speed 1.1m/s •400kW Crusher and BSL motors Chain 1.5m/s •2 x leg 1900/3500 mm 971 ton shield •Canopy Ration of 2.3 :1 Leg angle of 12 degrees and caving angle of 29 degrees •6 leg Gate end shield •AFC centres of 6.9m with bent rear AFC •Open Bottom Rear AFC pans 1142 mm PF 5 42mm chain • 1342mm BSL •150m face for A1 Panel the 220m A2 Panel •PMCR electro Hydraulic shield control •BSL Current control
  9. 9. Phase 2 LTCC at Austar Coalmine 17 October 2013 9 The opportunity for this was the re-handing of the Kit for Area 2 Improvements implemented •Move the Rear Tail gate drive from the end of the face to 4 shields into the block •Rear TG drive on a base plate with tunnels •Introduce 4 larger capacity 4 leg shields operating 1 web back at the Tail gate end of the face •Introduce the Cross frame and P drive onto a 1542mm base for the Rear AFC MG Drive but the BSL is only 1342mm, extra room for coal flow past front drive •Introduce 2 x 4 Leg Buttress shields into the Maingate inbye of the cross frame •Shorten the Roadway shield and position at highest abutment area of the Main gate roadway •Straighten the Rear AFC and decrease the AFC centres to 6.150m •Lower the TG drive and apply 3.5 degree attack angle to the bed plate •Flatten out the Rack bar at the MG so the shearer does not lift •Introduce Big Foot ( a hydraulic stab jack) to Lift the Goaf side of the Front MG drive
  10. 10. Phase 2 LTCC at Austar Coalmine 17 October 2013 10
  11. 11. Phase 2 LTCC at Austar Coalmine 17 October 2013 11
  12. 12. Phase 2 LTCC at Austar Coalmine 17 October 2013 12
  13. 13. Phase 2 LTCC at Austar Coalmine 17 October 2013 13
  14. 14. Phase 3 of the LTCC North Goonyella Coalmine 17 October 2013 14 •The Yancoal / Peabody LTCC project provided to opportunity to develop and implement phase 3 of the LTCC equipment . •A detailed review of the Austar kit identified many areas of improvement, with these implemented into the design with Caterpillar for the North Goonyella equipment to improve reliability, efficiency and maintainability. •1000mm web was selected due to following reasons 1.Lower extraction height improved roof strength ( thicker beam, Austar Mine ) 2.Increased support density of the new shield 3.Shield Lower . Advance . Set. operating one shield behind leading drum 4.Variable cutting cycle designed to assist with face conditions and production
  15. 15. Phase 3 of the LTCC North Goonyella Coalmine 17 October 2013 15 New equipment design to improve the efficiency of the LTCC performance. •In-line rear AFC drive unit ( AFC centers 7.150m with both AFC parallel ) •3 leg special gate end shields with increased advance force on the DA ram design ( to improve support density at gatends ) •Cross – frame rear M/G drive arrangement •Side shift cylinder from rear of No 3 shield to base plate of rear AFC cross frame •Mono rail mounted pump station • Double ended Pump motors with pumps mounted on both ends •Fully automated cutting and caving cycle with automated Dust control •Closed bottom rear AFC with Coal saver attached to improve recovery of Top coal
  16. 16. Phase 3 of the LTCC North Goonyella Coalmine 17 October 2013 16 Due to the difficult Middle Goonyella seam the Run of face shield design was improved to provide a higher support density These are • Shield centres 2050mm •Increased Cylinder leg size to 450mm •Improved shield hydraulic circuitry to reduce return pressure •Leg angle increased slightly •Caving Canopy angle increased slightly •Canopy ratio 2.29 :1 •Caving door position constant thru height range
  17. 17. Phase 3 of the LTCC North Goonyella Coalmine 17 October 2013 17 North Goonyella Mine Run of face shield Austar Mine Run of Face Shield
  18. 18. Phase 3 of the LTCC North Goonyella Coalmine 17 October 2013 18
  19. 19. Phase 3 of the LTCC North Goonyella Coalmine 17 October 2013 19
  20. 20. Phase 3 of the LTCC North Goonyella Coalmine 17 October 2013 20
  21. 21. Phase 3 of the LTCC North Goonyella Coalmine 17 October 2013 21 •Tons per metre /Shear = 2512 tons •Sheared Coal = 1542 Tons Caved Coal = 970 Tons •305m face , 3000t/hrs system •1200Kw drives on the AFC with 600Kw drives on Crusher and BSL
  22. 22. Phase 4 ( proposed) LTCC at Austar Coalmine 17 October 2013 22 •Replacement of the 6 leg shield with the 4 leg shield
  23. 23. Phase 4 ( proposed) LTCC at Austar Coalmine 17 October 2013 23
  24. 24. Future Development of LTCC Equipment 17 October 2013 24 •Reduce the Length of the Rear Tail gate Drive unit •Design Walking Tailgate roadway shields •Onboard shearer dust scrubber •Determine the most efficient cut to cave ratio •Determine the most efficient face length •Mobile fleet that can efficiently relocate the size of the current LTCC kit •Reduce the amount of coal left in the Goaf •Improve Maintenance Strategies to achieve higher engineering availabilities •Therefore higher % utilization and higher productivity at lower cost .
  25. 25. Conclusion 17 October 2013 25 •Australian coal companies need to embrace this concept •Maximize Resource Recovery •New Technology concepts developed from the Operators • The Operators work closely with the Designers from Caterpillar to improve the design of the equipment •Keep the Process Simple • Maintain High Operational and Engineering Standards •Automation

×