Dendrobium Coal Development Taskforce Presentation.
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Transcript of Dendrobium Coal Development Taskforce Presentation.
Dendrobium Coal
Development Taskforce Presentation
Page 2
Dendrobium and Illawarra Coal
•Commenced construction 2001 for continuity of number 3 seam supply for Illawarra blend
•Commenced longwall production April 2005
•Transport via rail network to Dendrobium Washery
Page 3
Dendrobium Mine Portal
Area 1 Longwall Blocks
No.1 Vent Shaft
BlueScope Steel & Coal Terminal
Page 4
Regional location
Mine site
Cordeaux Dam
Stockpile and coal handling facilities
Mount Kembla Village
AREA 3
AREA 2
AREA 1
AREA 3
AREA 2
AREA 1
Page 5
Mine plan overview
Operational constraints
•Mining within a sensitive catchment
•Multiple external approvals
•Geology and structural intrusions
•Proximity to other existing mines
•Curfews for transport
•Community proximity
•Longwall constrained by development
Page 6
Development Equipment Overview
• Gate road: – 2 x Voest Alpine continuous miners (superpanel)– 2 x 15SC 32 Waratah Shuttle cars– 1 x Stamler feeder– 1 x 18m3 and 1 x 23m3 Auxiliary Ventilation Fans– Conveyor 1500mm fastgate
• Mains Headings: – 1 x Joy 12 CM 30 continuous miner – 1 x 10 SC 32 shuttle car – 1 x Stamler feeder– Conveyor 1800mm bolted structure– 1 x 18m3 auxiliary ventilation fan
Page 7
Constraint- Mining under and adjacent to old mine workings
•Risk management and gaining approval for development and extraction
•Pillar by pillar approval requiring up holes for drainage
•Water management under Mount Kembla Colliery – infrastructure to pump up to 150l/s
•Training and authorisation of personnel to work in control zones
Page 8
Constraints – Exploratory and statutory drilling
Stubs driven off gate roads
Page 9
Constraints – Geology (MG3 ABM20 superpanel)
• Geology – Low strength roof conditions with a large number of low angle faults and dykes. Support type is the primary driver of development performance
MG3 - Pillar Cycle Times v's Support Type
256
134
23
240 260
113
165
242
11
43
149
171
72.5 85.5
305
169
114
5043
266114
61
296 320
112
210155.5 248
227
128
180
88
53
231
54
545
8
6
20
0
100
200
300
400
500
600
3 - 4
4 - 5
5 - 6
6 - 7
7 - 8
8 - 9
9 - 1
0
10 -
11
11 -
12
12 -
13
13 -
14
18 -
19
19 -
20
14 -1
6
16 -
18
Face
/ Blee
der h
dg
Met
res
of
Su
pp
ort
0
5
10
15
20
25
30
Pil
lar
Cyc
le D
ays
Sum of M's Developed in X2 Red Support
Sum of M's Developed in Red Support
Sum of M's Developed in Yellow Support
Sum of M's Developed in Green Support
Sum of Pillar Cycle Time
C / T
Data
Cycle time range: 7 -19 days
Cutting rate:0.5m/hr – 3.5m/hr
Page 10
Constraint - Geology
Normal mining horizon 3.2m
Roof falling to 5.5m on first workings and roadway for future tailgate
Typical Jointing on Development
Red Support density
Page 11
Improvements – Changing mining horizon
• Historical soft floor conditions
• Reduced sprains/strains – muddy conditions
• Reduced production delays - bogging of equipment, cleaning of roads and pumping
• Reduced equipment damage
Sprain & Strain injuries in the Dendrobium Development Panel
0
1
2
3
4
5
6
7
8
Jan Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar May Jun
2005 2006
Total
Total Recordable Injuries (All) Business Unit Name Development - DEN Nature Of Injury Name Sprains/Strains
Count of Event#
Years Occurred Date
Ramped up on coal 15th Dec
05
Floor conditions changed 9th Apr
05
BHPB Development Metres / week - Since rampup in NWMs - FY06
0
50
100
150
200
250
300
TotalLinear (Total)
Sum of BHP M's
WEEK
Page 12
Improvement – Gate belt installations
•Working at heights and time constraints
•Transfer point, Jiffy drive & structure - installed first pass at 3.1m high
•Panel sequenced around jiffy belt installation - 4-5 days
• Hydraulically tensioned boot
•Allows final drive / LTU installation - 2-3 months
Working at heights risk reduced
Page 13
Improvement – Gate belt installations
Jiffy drive configuration : flameproof 110kw with delay fluid coupling mounted from head pulley off a torque arm
Hydraulically tensioned boot end for use with the jiffy drive gate belt installation.
Page 14
Improvement – Fit for purpose equipment
Building on the work from Centennial Coal - machines modified to better control variable strata conditions.
Stage 1: removal of CLA and fitment of EW
shovels
Stage 2: Tilt on apron
Page 15
Improvement – Supervisory leadership
• Managing performance and developing people - frontline supervisors
• Supervisors relatively young with little experience
• Conducted a site survey on Leadership.
• Linked leadership to front line competencies
• Real workplace ‘projects’ as learning vehicles and supported by workplace coaching
• Tailored Certificate IV ‘Business’
• Review and evaluation on-going
Page 16
Upcoming challenges: Mining at grades
Grade of 1:5 seam profile (9m seam section)
Page 17
1:8 Drifts to remain within Seam from NWM 13 – 20c/t
Upcoming challenges: mining at grades
Page 18
Summary
• Dendrobium is a simple mine constrained primarily by location and geology, though forms an essential part of the Illawarra Coal business
• Continue to learn about more accurate forecasting and management of local number 3 seam conditions
• Rationalising development for simplicity, and consistency• Continue to seek changes to equipment- fit for purpose• Considerable challenges ahead - mining at grades