MINNING Overview of National Aluminium Company Mines

1. Mining Operations Overview
Green Field Mining
By
Pramit Kumar Pattanayak

5. 1. Steps to Open a Mine
a) To prove the potentiality of reserve, rehabilitation prog.
b) To workout the demand profile.
c) The available infrastructure(Road, Power line, Rly.
Siding, Housing, Market etc.)
d) Nature of deposit (Operating cost must be least).
e) Availability of equipment, Procurement of equipment
vis-a-vis mine target.
f) Financial Involvement and rate of return.
g) Manpower assessment.
h) Notice of opening in form1 to DGMS and also to DMS
of that region.
5
Project Report:
Based on the report supplied by GSI or other prospecting
agencies, A complete project report is to be prepared by
CMPDIL or by other approved body. This report is to be
submitted to G.O.I for its approval and necessary orders:
a) Land area requirement and its acquisition
b) Program including shifting of population and their
rehabilitation.
c) Life of the mine including M.O.W (Method of Working),
selection of customer in mode of return , dispatch
system , machinery.
d) Employment status in recruitment procedure.
e) EMP
f) EIA
g) Reclamation programme (Applicable for O/C) i.e. Green
belt vegetation.

6. 2. Overview of Mining processes (1/2)
6
Processing
Dry Plant
Wet Plant
Despatch
CLO/ fines
despatch to
customers
Iron Ore Mining Process Flow

7. 2. Overview of Mining processes (2/2)
7
Coal Mining Process Flow
MC
CC
TC
RJ
Quarry
Raw Coal and OB Removal Raw Coal processing to get
Clean Coal
To Customers
and Power
Plants
Crushing
RC: Raw Coal TC: Tailing Coal CC: Clean Coal MC: Middling Coal RJ: Reject
W: Waste IC: Internal Customer Q: Mine Quarry W: Waste
Coal Dispatch
Coal Beneficiation (Crushing and Washing)
Washery
RC
RC
w
Q
Coal Mining

8. MINES
OPENCAST MINES UNDERGROUND MINES
• Opencast Coal Mines Underground Coal Mines
• Opencast Metal Mines Underground Metal Mines
(Trench mining in NALCO)

9. PANCHPATMALI BAUXITE MINES OF
NALCO.
Panchaptmali
Bauxite Mines of
NALCO
BALABHADRA
KONARK SUBHADRA
ARKHAPAL-B
BHUBANESWARI
LINGRAJ
BALIPATA
DURGA
RADHIKAPUR
D
C
KOSLA
GOPAL
PRASAD
WEST
HINGULA
NISA TOWN
B2
B1
KALINGA
EAST
C'
PADMA
D
NATRAJ
NANDIRA
TALCHER
E'
DUELBERA
DHARAMPUR
TALCHER
AUNLI
PATRA-
PADA
MACHHAKATA
MAHANADI
CHHENDIPADA
BHAGIRATHI
BAITARNI
TIKRA
ALAKNANDA
NAINI BANKHUI
MANDAKINI
NEELACHAL
KANIHA
STPC
SAMAL
TOWN
A'- JAGANNATH
B'-
C'-
D'-
E'-
SOUTH
ANANTA
ANANTA
HANDIDHUA
O.C.
BALANDA O.C.
O.C.
O.C. EXPN
U.G.
INDEX
BARAKAR
KARHARBARI
NALA/
TALCHER
METAMORPHIC
ROAD
EXISTING RLY. LINE
RIVER
COLONY
NANDIRA JHOR
ROAD
ROAD
ANGUL TOWN
NALCO
SMELTER
N
A
L
C
O
TPS
(NALCO)
TO CUTTACK
T
O
C
U
T
T
A
C
K
/P
A
R
A
D
IP
/V
IZ
A
G
FERT. PLANT
FCI
NH
-23
TO ROURKELA
UTKAL
A
TO SAMBALPUR
TALCHER SAMBALPUR RAILWAY LINE
ROAD
NH-42
0M 4675M 9350M
84°-45'
2
0°-50'
2
1°-00'
2
1°-10'
84°-45' 85°-00' 85°-15' 85°-25'
2
1°-00'
2
0°-55'
T
O
P
A
L
L
A
H
A
D
A
TIK
RA
N
A
DI
R
O
A
D
Bharatpur
south
Bharatpur
north
CHHENDIPADA
BAITARNI
EAST
WEST
WEST EAST
Promotional
Promotional
BRAHMNI
KALINGA
GOPAL
PRASAD
EAST
WEST
NC
NC NC
Cptv.
Cptv.
Cptv.
Cptv.
Cptv.
Cptv.
( KANIHA-II)
Non potential
BALABHADRA
Cptv.
Kosla exploration
camp
Brahmni River
RAMCHANDI
Cptv.
UTKAL
RADHIKAPUR
EAST(INCL.
UTKAL F)
SINGHARA JHOR
NC
SAKHIGOPAL-B
NC
ARKHAPAL-A
NC
NC
UTKAL E
BLOCK
BLOCK LOCATIONMAP
NATIONAL ALUMINIUM COMPANY LIMITED
MINING PLAN FOR UTKAL-EOCP
UTKAL
E
GEN-II
UTKAL-E & UTKAL-D COAL MINES OF
NALCO.
Utkal-D&E Coal
Mines of NALCO
NALCO MINES

10. BRIEF ABOUT UTKAL D& E (Combined) COAL MINE
Sl
.
N
o
Details Utkal D & E
1 Total area 825.01 Hectare (Ha)
Forest
land
312.70 Ha
3 Extractable
Reserve
176.05 Million Tonnes
4 Area of
Excavation
393.44Ha
5 Peak Rated
Capacity
4.0 Mtpa
6 Coal Grade G-13 (avg)
7 Expected Life of
Mine
48 year

11. 11
THERE ARE 04(FOUR) PILLARS OF ANY GREEN FIELD MINING
1. Environmental Clearance
2. Land acquisition
3. Mining Lease
4. Forest Clearance

12. 12
12
MAJOR ACTIVITIES FOR GREEN FIELD COAL MINE PROJECT
 Land Acquisition for:
- Mining Lease Area, R&R,CISF Colony ,Township
- Transport Corridor
 Mining Lease
 Environmental Clearance
 Forest Clearance
 EPCM Consultancy contract
 Coal and OB out sourcing contract (MDO)
 Electrical Power
 Water (Industrial and Drinking) clearances

13. Miscellaneous activities.
 Explosive Magazine Permission from Controller of Explosive, Nagpur
 Permission for Establishing Diesel Bunk and Using Diesel Bousers
 Wild Life Clearance from PCCF(WL) and CWLW.
 Consent to establish Coal Mine from OSPCB
 Tree felling permission from Forest Department
 Mining Opening Permission from DGMS.
 Permission to use water and electricity from Govt. Authorities

16. 16
Land Acquisition

17. Land Acquisition step(As per land acquisition act 1894)
• NOTIFICATION NO ACTIVITIES
1. Short title, extent and commencement.
2. (Repealed)
3. Definitions.
4(1). Publication of Notification in official Gazette and in two daily news
5. Payment of compensation for damage done to land during the course
of surveying
6(1). Declaration that the land is required for a public purpose.
7. After draft declaration under Section–6 Collector to take order for the
acquisition of the land.
8. Land to be marked out measured and planned, unless it has already
been done under Section – 4
 Family generology
survey
 Land Survey
 Structural Survey
 Tree Enumeration
LAND ACQUISITION

18. 18
NOTIFICATION NO ACTIVITIES
9. Collector to cause public notice to be given at convenient
places on or near the land inviting claims to compensation
for all interests in land.
10. Power to require and enforce the making of
Statements as to names and interests.
11. Enquiry and award by Collector.
12. Collector to give immediate notice of award (12-2) to those
who are not present when award made.
13. Adjournment of enquiry.
13A. Correction of clerical errors, etc.
14. Power to summon and enforce attendance of witnesses and
production of documents.
15. Matters to be considered and neglected.
15A. Power to call for records, etc.
Taking possession

22. 22
Mining
lease

23. 23
Mining Lease
Application
Inspection by
Geologists
Spot inspection report
to Director Geology
& Mining
Technical recommendations
to department of Mines,
State Government
Inspection by
RI/Tahasildar
Spot inspection
report to Collector
Revenue recommendation
to Department of Mines ,
State Government.
Department of Mines,
State Government
Recommendation by
Ministry of Mines
State Govt
Ministry of
Coal , Govt.
of India
Concurrence
for grant to
State Govt.
Intention to grant
order by state
Govt.
ML order by
state Govt.
Approval of Mining Plan
Site clearance from MoEF
Project Clearance from MoEF
ML Deed
Execution
Land
demarcation and
Stamp duty
Adjudication
Permission
from DGMS
Mine Opening
Notice
Mining
Operation
COLLECTORATE
DGPS
Survey

24. 24
Rehabilitation
AND
Resettlement

25. 25
25
PROPOSED AREA TO BE ACQUIRED FOR R&R SITE FOR 350 FAMILIES :-
MINIMUM FACILITIES TO BE PROVIDED IN PROPOSED R&R SITE
 School
 Roads, Drains and playground
 Drinking water and electricity facilities in village
 Village Sabhagruha
 Mahila Samiti Gruha
 Temple, Church and Maszid as per religion
 Cremation ground/Burial ground
 Arrangement for enhancement of Skills
 Common pond.
 Any other facilities as required for day to day life

30. Utkal-D & E Coal Mines - INTRODUCTION
Particulars Details
Lease area 825 Ha
No. of workable coal seams 17
Geological Reserve 297.578 Million tonnes
Extractable Reserve 176.05 Million Tonnes
Grade of Coal G-13 (Avg. GCV- 3747 kcal/Kg)
Stripping Ratio 2.27: 1
Mine Capacity 4.0 Million Tonnes per Annum
Mine Life 46 Years
Mining Method Mechanised Opencast including Highwall mining
Coal: Surface Miner, Payloader & Dumpers
OB: Drilling & Blasting, Shovel Dumper combination
Mode of operation of Mine Through Mine Developer cum Operator
M/s UCMIPL (Consortium of M/s Mythri Infrastructure Pvt. Ltd & M/s AMR Ltd.)
Notice of Mine Opening 22.08.2022
Status of Mining Operation Mining Operation from Utkal-D Coal Mine was started w.e.f.09.11.2022 and
Clearances for Utkal-D&E Coal Block (Combined) is under process.
30

31. LOCATION DETAILS
Particular Details
Area Project area: 862.526 ha (ML Area: 824.316 ha + freehold area: 38.21 ha)
Location of
Mine site
Villages
Nandichhod (Gopiballavpur), Gopinathpur Jungle, Kosla,
Kundajhari Jungle, Korada, Raijharan, Similisahi
Tehsil Chhendipada
District Angul
State Odisha
Toposheet No Core Zone: 73D/13
Buffer Zone: 73H/1, 73G/4, 73C/16 and 73D/13
Category Category “A”, 1(a)-(3) Mining of Mineral
Project Utkal D & E
31

32. Sub-bituminous coal or black lignite is a grey-black or dark
brown coal. It ranges from hard to soft as it represents an
intermediate stage between low quality lignite and higher
quality bituminous coal. The carbon content of sub-bituminous coal
varies from 70-76%.[8] Sub-bituminous coals are among the
younger coals geologically—approximately 251 million years old.
Therefore, the longer burial time compared to lignite increases it's
energy density ranges from 18-23 MJ/kg.[4] This type of coal is the
most commonly used, with 30% of coal resources being sub-
bituminous
Coal available in Our Mines

33. 33
Timeline/Milestones
Sl. No. Milestone Timeline (Actual / Expected)
1 Allotment of Utkal D&E Coal Mines in favour of Nalco (Zero Date) 02.05.2016
2 Grant order for Mining lease of Utkal-D 16.04.2020
3 EC (Environment Clearance) of Utkal-D Coal Block 11.08.2020
4 Revision of Zero Date of Utkal-D&E Coal Block 21.08.2020
5 FC (Forest Clearance) of Utkal-D Coal Block 06.01.2021
6 Execution of Mining Lease of Utkal-D Coal Block 25.03.2021
7 Grant order for Mining lease of Utkal-E 12.04.2021
8 Grant of Mine opening permission of Utkal-D Coal block 21.05.2021
9 FC (Forest Clearance) of Utkal-E Coal Block 31.01.2022
10 Engagement of MDO (LOA) 28.02.2022
11 Execution of Mining Lease of Utkal-E Coal Block 31.03.2022
12 Grant of Mine opening permission of Utkal-E Coal block 30.09.2022
13 Construction of Railway siding 31.10.2023
14 Development of major Mining Infrastructure, Roads, Buildings, workshop, Lab. etc
including Development of R & R Colony - Completion
31.10.2023
15 Commercial Operation date 31.12.2023

34. GEOLOGY
Utkal-D&E coal blocks are located in the southcentral part of Talcher coalfield, Odisha.
Talcher coalfield is the south-eastern most part of lower Gondwana basin within northwest southeast trending Sone-
Mahanadi master basin belt. The coalfield is nearly elliptical in shape having strike length of about 80km (east-west)
and dip extension (north-south) of around 26km. Strike and Dip General strike of the beds in mainly E-W to ESE-
WNW with slight variations in the central part of the block. The direction of the dip of the strata is towards N to NNE
and the amount varies from 3 °-8 °. 3 faults with throw ranging from 0 to 15m heading both North & Southward.
Faults occur mostly in the central part of the block; thus major part of the combined block remains almost free from
structural disturbance. Dip of the fault plane is around 70° -75°.
Gross Geological Reserve "Mt“-303.71
Blocked Reserve "Mt“- 113.3520
Extractable Reserves "Mt" 176.0500
Excavation Area 393.4400
External Dump 345.4100 4.
Safety Zone 23.3100 5. Other Use 29.8200 6.
Infrastructure area 65.1100

35. RULES & REGULATION IN COAL MINES SAFETY
35
Sl. No. Statute
1 The Mines Act, 1952
2 The Mines Rules, 1955
3 The Coal Mines Regulations, 2017
4 The Mines Rescue Rules, 1985
5 The Mines Vocational Training Rules, 1966
6 The Mines Crèche Rules, 1966
7 The Mines Maternity Benefit Act & Rules, 1963
8 The Indian Explosive Act, 1884
9 The Explosive Rules, 2008
10 The Workmen Compensation Act, 2010
11 The Electricity Act, 2003
12 The Central Electricity Authority (measures related to safety & supply) Regulations, 2010

36. RULES & REGULATION IN COAL MINES SAFETY(Envt)
36
Sl. No. Statute
1 The Environment (Protection) Act 1986 (EPA);
2 The Forest (Conservation) Act 1980;
3 The Water (Prevention and Control of Pollution) Act 1974; and
4 The Air (Prevention and Control of Pollution) Act 1981.
5 MMDR Act 1957
6 Mineral Concession Rule 1960
7 Mineral Conservation and Development Rules 1988
8 Wildlife protection act 1972

37. Mining Operation in Utkal D Coal Mine
Mining Method- Surface Mining using Surface Miner + shovel-Dumper combination in coal excavation.
Drilling- blasting + shovel-Dumper combination for removal of Overburden.

38. Development process of a new mine
 Geological survey
 Exploration
 Mine development
 Mining
 Rehabilitation: acid mine drainage, selective
mining, waste rock dumping site, cover system,
erosion control, revegetation etc.
 Environmental monitoring
2

39. Mining Methods
 Surface/open cut mines:
 Strip mining; dragline
 open pit mining; truck & shovel, BWE etc.
 Underground mines: manual, semi- mechanized, fully-
mechanized
 Bord/Room-and-pillar mining
 Longwall/shortwall mining
 Other methods depending on seam conditions
3

40. Open cut/surface mining: 40% of total produced coal (WCI）
 （For example, 80%: Australia,67%: USA）
•Strip mining: horizontal～gentle dip seams(side-casting, in-pit disposal)
•Open pit: Steep dip and multi-seams (dump site, out-of-pit disposal)
•Mountain top removal mining (Appalachian coal field, USA)
Stripping Ratio = Volume of Material (bcm)/ Extraction of Coal (ROM-ton*)
4

41. Strip Mining
5

42. Open pit mining (shovel & truck): flexible
4
2

43. Seismic survey and exploration drilling
4
3

44. Topsoil stripping by bulldozer or scraper
4
4

45. Overburden drilling for blast holes and blasting
4
5

46. Blasting pattern (example)
10

47. Explosives
 ANFO (Ammonium Nitrate Fuel Oil
Explosive)
 Slurry, Watergel, Emulsion Explosives
 High Density ANFO (emulsion blends or
heavy ANFO)
 Velocity of detonation:
ANFO
Watergels
Emulsions
2,200-4,000 m/s
3,500-5,000 m/s
4,500-6,100 m/s
12

48. Dragline (50 million US$)
13

50. Bucket Wheel Excavator (over 1 billion US$)
50

51. Truck and shovel
51

52. Super dump truck-Komatsu 960E
(Payload:327t) 5 million US$
52

53. Coal extraction (truck, dozer & shovel)
53

54. The major equipment for the mine producing
7 Mt/yr
 6 x electric rotary drills (250 mm dia.) for overburden
 12 x electric shovels with 17 m3 buckets for
overburden
 4 x hydraulic shovels with 11 m3 buckets for coal
 6 x rubber tired front end loaders with 9.6 m3 buckets
 50 x 154 t 900 kW rear dump trucks for waste haulage
 14 x 109 t 900 kW rear dump trucks for coal haulage
 19 x 300 kW track-mounted bulldozers
 3 x 224 kW wheeled bulldozers
 Other vehicles (Pick-up cars, Site-mixing truck,
Graders, Water spray trucks etc.)
54

55. Performance of equipment
 Availability = Operated hours/Scheduled hours x 100
(%)
 Efficiency = Operated hours/Available hours x 100
(%)
 Utilization = Real work hours/Operated hours x 100
(%)
 The bigger, the better!
55

56. Typical underground mining systems
56

57. Room (Bord)-and-pillar (Continuous miner
and shuttle car)
57

58. Wongawilli method and break line support (BLS)
23

59. Longwall mining
Shield Supports
Shearing Machine
Armored Face Conveyor
Stageloader &
Belt Tailpiece
Drive Unit For
Armored Face Conveyor
59

60. Mining Operation in Utkal D Coal Mine
Mining Method- Surface Mining using Surface Miner + shovel-Dumper combination in coal excavation.
Drilling- blasting + shovel-Dumper combination for removal of Overburden.

61. Longwall face with shearer and shield
supports
 Seam thickness: 1.5-7.0m
 High performance
61

62. Plow mining
for thin seams:
Seam thickness:
0.6-2.3 m
Full automation
62

63. Shortwall
Mining
63

64. Prop and cap mining system
物理探査の
の
概要
概要
64

65. “Kakkuchi” (Cut & fill) mining for
steep coal seam
65

66. Longwall top coal caving (LTCC) method for extra-thick
seam
66

67. Multi-slicing method for thick
seam
31

68. Blasting
gallery
(BG)
method
for thick
seams
using
long
blasting
holes
32

69. Ring
blasting
pattern

70. Longwall Panel Design
 Geological conditions: faults, coal seam
 Panel size:
Panel width; 50-250 m,
Panel length; 300-1000m, ave. 450m
 Super panel in the USA
Panel length; over 3000m
Twenty-mile mine: Panel length; about
6000m
34

71. Vertical stress distribution around a
longwall panel
71

72. Interpanel-pillar system
72

73. Stability of the
longwall face
using shield
supports
73

74. 74

75. 75

76. Rapid roadway drivage with S-
100 Roadheader
76

77. Material transport
77

78. Rockbolts
42

79. Roadway drivage with bolter miner
43

80. Dual support system with steel supports and bolts
Roof bolt
(2.4m)
Rib bolt(1.5m)
W-strap with steel mesh
Steel pipe
Fiber mesh
Standing steel support
80

81. Stress
conditions in
UK and Japan
coal mines
81

82. Strata Behavior Monitoring System
(a) Monitoring System
82
(b) Tell-tale System

83. Accidents in underground coal mines
1) Roof and rib falls
2) Outbursts of coal, rock and gas
3) Spontaneous combustion
4)Coal dust explosion: frictional sparks
from machine cutting
5)Gas explosion: frictional sparks from
machine cutting
6) Mine fire
7) Water inrush and flooding 47

84. 48

85. Causes of roof fall
 Geological conditions: weak strata,
deterioration due to water (humidity),
wet/dry cycle of ventilated air
 Stress conditions: magnitude and
direction, heading faces, intersections,
mining activities
 Support systems: bolting, standing
supports (steel arches, three-piece sets,
articulated supports, yielding supports,
etc.)
49

86. Highwall mining systems
 Transit mining systems from surface to
underground
 Safest underground mining system
because of none working in underground
 Mining systems
1) Auger mining
2) Metec Miner System
3)Continuous Highwall Mining (CHM)
System: Add car system, Archveyor
system 50

87. Auger mining
87

88. Metec miner system
88

89. Add car system (CHM)
89

90. Archveyor system (CHM)
90

91. Longwall punch mining
91

92. Room/Bord-and-pillar punch mining
56

93. Methane gas emission/diffusion at
ponds
93

94. Rehabilitation
Sedimentation pond
Recovery of a disturbed land into a stable, safe and forming a sustainable
forest ecosystem 59

95. 60

96. Mining Area
Coal Mining Operation

97. AVAILABLEMACHINERYFLEET

98. Salient features of Bauxite Mine
-Largest Bauxite deposit in Asia
-Largest Bauxite producing Mine in Asia
-Open cast, fully mechanized, trench concept Mining
-Simultaneous Reclamation
-Largest double roll tooth crusher
-Longest single flight conveyor on hilly terrain

99. North block
Central block
South block
Present Working area
PANCHPATMALI BAUXITE MINES
Status as on dt. 31-03-2021
1. Bauxite Transported to Refinery:
142.7 mill. Tons apprx.
1. Balance Mineable reserves :
164.3 mill. Tons apprx.
1. Balance Life of Mine (apprx): 22 yrs @
7.5mtpy.
The deposit occupies
the crest of the
Panchpatmali
plateau, which is
about 21kms long
and trends in NNE-
SSW direction. It has
a plateau top area of
16.80 sq.Kms

100. Key parameters
Top soil 0 – 1 mtr.
OB thickness 2 - 4 mts.
Bxt. thickness 14 mtr. Avg.
Tonnage (Total) 310 mil.tons
Al2O3 40 - 44 %
SiO2 2 - 3 %

101. Field Samples
SABmis2ppt
OB/Aluminous Laterite
Bauxite
PLK Khondalite

102. PANCHPATMALI BAUXITE DEPOSIT
Bottom bauxite
(3-4 m)
Main Bauxite
(8-10m)
Lateritic OB
(2-4 m)
Top soil
(0-1 m)
Top soil
(0-1 m)
Lateritic OB
(2-4 m)
Main Bauxite
(8-10m)
Bottom bauxite
(3-4 m)
Backfilled
area
Plantation
s
Cross section Vertical section

103. FUNCTIONS OF GEOLOGY DEPT.
(As per MCDR 2017)
• Carry out Prospecting & Exploratory works.
• Prepare Geological Maps, Plans & Sections.
• Maintain Bore hole Samples, logs & Records.
• Calculate Ore Reserves and Grades.
• Update Mineral Resources as per UNFC guidelines.
• Conserve & Optimise use of Mineral Resources.
• Guide Mining Operations to Optimise Ore Quality & Qauntity.
• Develop appropriate Sampling methods & Prepare samples.
• Carry out Mineralogical studies.
• Implement IBM guidelines as applicable.

104. Drilling
Sample
Processing
Reserve Estimation
& Mine Planning
Plan Implementation
& Quality Control
Drill Sample
PROCESS FLOW CHART

105. KPA Objectives
Pre-Production
Drilling
Drilling on 25m x 25m grid.
Mine planning
1. Reserve Estimation (100/25m grid)
2. Long term Plans(5yrs) and Short term plans Annual /
Monthly Mine plans .
Sample Collection
& processing
1. Hourly ROM samples
2. Blast /Rip/Btm bxt. /Field Samples
Quality
control
1. Ensure ROM Quality - Al2O3(T) & SiO2(T)
2. Maximise Ore Recovery
KEY OBJECTIVES

106. 106
❖ Pre-Production drilling is required to know the grade and thickness of
overburden and Bauxite ore.
❖ PP Drilling carried out on 25m x 25m grid.
❖ Powder sample is collected from each meter of drilling
❖ Each sample after being dried and processed (grinded up to -200 Mesh
size) is sent to laboratory for chemical analysis
❖ The analysis of meter wise sample data is used for mine planning
purpose, where the estimation is done using SURPAC Mine planning
Software

107. Blocks Area
Overburden (Top soil + Laterite) Bauxite
Tonnage
(Mill.T)
Al2O3
%
SiO2%
Thickness
In Mtrs
Tonnage
(Mill.T)
Al2O3% SiO2%
Thickness
In Mtrs
Central &
North Block
NB* 3.48 36.73 16.46 2.2 20.27 41.57 4.12 14.0
CB-I # 0.16 38.85 12.09 1.5 1.33 42.25 3.37 14.5
CB-II 3.87 35.44 14.02 1.1 63.10 43.85 3.56 14.5
C-N Mine 7.51 36.11 15.11 1.6 84.70 43.28 3.69 14.4
South Block SB 7.94 35.91 16.34 1.6 79.94 42.37 3.88 13.6
Panchpatmali C-N + SB 15.45 36.01 15.74 1.6 164.64 42.84 3.78 14.0
Balance Reserve As on 31.03.2021

108. THE MONTHLY ROM QUALITY AT PANCHPATMALI BAUXITE MINE
SHOULD BE MAINTAINED AS FOLLOWS :
• Total Al2O3 : 42.50 ± 2.0 %
• Total SiO2 : 3.84 ± 0.50 %
QUALITY CONTROL

109. ⮚ Removal of Top Soil
⮚ Loosening of Lateritic OB by Drilling-Blasting/Ripping-Dozing
⮚ Loosening of Main Bauxite by Ripping-Dozing/Drilling-Blasting
⮚ Selective excavation of bottom bauxite by Excavators
⮚ Loading by Wheel loaders or directly by Back hoe excavators
⮚ Transportation by 55T/100T rear dumpers
⮚ Crushing and Conveying of ROM Bauxite to Alumina Plant
Process involved in Bauxite Mining

110. RECLAMATION AND REHABILITATION OF MINED OUT AREA

111. Thank You

112. Safety first!
• Thank you
• for your kind
• attention!
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