This training report provides information on the Gevra Mines location, climate, methods of mining, drilling and blasting procedures, soil disposal planning, pumping and drainage systems, power supply, manpower, and civil construction activities. It also discusses the status of air, water, and noise pollution and describes control measures implemented. The report concludes with details on the mine closure plan and restoration activities.

1. Training Report
SECL Gevra Mines

3. Location, Physiography and Climate
• Gevra mining block having an area of about 19.03
sq.km is located in the central part of korba
coalfield.
• Latitude 22°18’00’’ and 22°21’42’’ and Longitude
82°32’00’’ to 82°39’30’’.
• The elevation ranging from 288m to 328 m above
mean sea level.
• The climate of the area is dry to moist tropical.
• The temperature rises to 48° in May and drops to
7° in December. The average annual rainfall is
1265 mm.

4. METHOD OF MINING
• Gevra Opencast Project is being worked by
opencast methods deploying shovel dumper
combination and HEMM configuration.
• Deployment of draglines is not suggested as the
combined thickness of the lower most seams i.e.
LK seam (>48 m) will restrict the efficient
deployment of dragline mining; and the inter-
parting between LK(top) and LK(bottom) does not
offer adequate load to justify the deployment.

6. Drilling & Blasting
• Drilling and blasting would be required only in OB
bench before excavation by shovels.
• 381 mm RBH drills will be deployed for shovel
benches of 42 cum rope shovel whereas 250 mm
RBH drill will be deployed for benches of 12 cum
shovels.
• 160 mm drills have been provided for drilling in
benches of bands and partings.
• The explosives consumption has been envisaged
as 0.30 – 0.35 kg/cum of excavation.

7. Soil Disposal Planning
• The proposed sequence of mining is ideally
suited for achieving the objective of placing
maximum possible waste in the internal
dumps.
• The opencast mining of Gevra block involves
removal of 1267.00 M.cum. of Overburden.
• Presently, internal backfilling is being done in
the quarry and considerable volume of OB is
also being dumped in the external dump.

8. Pumping and Drainage
• The pumping system at Gevra Expansion Project
(35 Mty) has been designed to dewater the
inflow of water due to precipitation falling within
the active pit limit during the monsoon season to
enable the mining activity to continue round the
year.
• The surface within the mine intake area is gently
undulating and local drainage pattern is towards
the seasonal nala i.e. Laxman Nala. This nala
drains into Ahiran river located towards north
east

9. Power Supply in the expansion report
• Gevra opencast expansion project will receive
power at 33kV from existing 132/33kV
substation of SECL at Gevra.
• The specific energy consumption of the
project has been estimated as 3.408 kwh/t for
a targeted production of 35 Mt per year.
Substation No. Voltage ratio Transformer Capacity
1 33/3.4kV 2x6MVA
2 33/6.5kV 2x16MVA
3 33/6.6kV 2x16MVA

10. Manpower & Productivity
The sanctioned manpower for Gevra Opencast Expansion Project (25 Mty)
was 2725.
the group-wise break-up of incremental manpower from 25 to 35 Mty is
given below
Sl no. Particulars Nos. % of total manpower
1 Workers 355 64.43
2 Monthly Paid staff 167 30.31
3 Executives 29 5.26
Total 551 100.00

11. Civil Construction
• excavation Workshop Complex.
• E&M Workshop Complex.
• Residential buldings.
• Roads and culverts.
colony roads and culverts
approach roads and culverts
haul road
diversion of road

12. Land Acquisition
• The break-up of the land is as follows:- The
sanctioned Project Report (25 Mty) will
require 3584.671 Ha of land which is already
acquired. Additional land reqirement for
Project Report (25 to 35 Mty) is assessed as
599.815 Ha.
Particulars Forest Govt. Tenancy Total
Rev
A Land already acquired
a. Quarry 385.121 289.514 1113.14 1787.77
4 9
b. Safety zone 3.472 4.643 75.385 83.500
c. Infrastructures & 515.434 261.859 936.099 1713.39
rehabilitation 2
Sub-Total (A) 904.027 556.016 2124.62 3584.67
8 1

13. B Additional land requirement
a Quarry area 78.507 10.682 160.282 249.471
b Safety zone 56.096 58.587 235.661 350.344
c Infrastructure & rehabilitation 0.00 0.00 0.00 0.00
Sub-Total(B) 134.603 69.269 395.943 599.815
C Total land for the project
(A+B)
a Quarry area 463.628 300.196 1273.42 2037.25
6 0
b Safety zone 59.568 63.230 311.046 433.844
c Infrastructures & 515.434 261.859 936.099 1713.39
Rehabilitation 2
Total land for the project 1038.63 625.285 2520.57 4184.48
(A+B) 0 1 6

14. Air Pollution Status
• The RDS was placed at various sampling
station to collect sample .
• RDS were run for 48 hour every week (for
three months to represent one season) to
collect SPM,SO2 and NOX sample.

15. • AIR QUALITY STANDARD: in micro gm/cubic m
STANDARD CATEGORY SPM RPM SO2 NOX
NAAQS(NATIONA INDUSTRIAL( 500 150 120 120
L AMBIENT AIR A)
QUALITY
STANDARD RESIDENTIAL( 200 100 80 80
B)
SENSITIVE(C) 100 75 30 30
AS PER AS MOEF OLD MINE(A- 600 300 120 120
NOTIFICATION O)
GSR 742(E)
DATED 25TH NEW 500 250 120 120
SEPTEMBER MINES(A-N)
2000

16. • AIR QUALITY DATA FOR GEVRA PROJECT(24
HOURLY)
DATE OF SPM RPM SO2 NOX
SAMPLING
07.05.11 302 145 19 23
23.05.11 280 132 24 28
No Of 2 2 2 2
Observation
ARITHMETIC 291 138.5 21.5 25.5
MEAN

17. Water pollution status
• Sample were collected from different location
in May 2011 and analysed.
• From the surface water sources , after removal
of floating/extraneous material, 3 lt of
representative water sample were collected in
plastic cans as per as IS:3025 and transported
to laboratory for physiochemical test.

18. • STANDARD
PARAMETER PH TSS(mg/l) COD(mg/l) O&G(mg/l)
Below detection 0.01 5 20 1
limit
AS PER AS MOEF 5.5 TO 9.0 100- 250 10
NOTIFICATION GSR 200(FOR
742(E) DATED 25TH IRRIGATIONAL
SEPTEMBER 2000 LAND)

19. • EFFLUENT QUALITY REPORT(GRAB
SAMPLING)FOR GEVRA PROJECT
SAMPLING STATION DATE PARAMETER
PH TSS COD O&G
GEVRA MINE 05.05.2011 7.61 89 105 <1.0
DISCHARGE
30.05.2011 7.79 99 135 <1.0

20. NOISE POLLUTION STATUS
• The noise level were measured by noise level
meter continuously for 24 hrs at hourly
interval ,in decibel under ‘A’ weighted average
.Values were reported as equivalent day , night
and day night noise levels.

21. • STANDARD:
MAXIMUM PERMISSABLE AREA CODE CATEGORY OF DAY TIME NIGHT
LIMITS IN DB(A) OF AREA TIME
AMBIENT NOISE LEVEL AS
PER MOeF NOTIFICATION
S.O 123(E) DATED 14aTH A INDUSTRIAL 75 76
FEBRUARY 2000 AND
GSR742(E) ,DATED 25TH
SEPT 2000
B COMMERCIAL 65 55
C RESIDENTIAL 55 45
D SILENCE 50 40
ZONE

22. • NOISE QUALITY DATA FOR GEVRA PROJECT
S/L NO AREA DATE DATE NOISE LEVEL
CODE
Day time Night time
1 A 03.05.201 19.05.201 68.7,69.1 62.7,63.2
1 1
2 C 03.05.201 19.05.201 61.8,58.9 52.6,53.6
1 1
3 C 03.05.201 19.05.201 52.6,53.2 41.6,42.3
1 1

23. Control measures for air pollution
• Water spraying by water Sprinklers (7 nos. of 28
KL and additional 3 to 6 nos. of 10 KL ) are being
done regularly on approach roads , coal
transportation roads and within the mining area
to minimize the dust generation.
• Conveyor belts for movement of total coal mined
from mine pit to surface will be installed to
reduce dust generation due to transportation.
• About 36.98 lakh saplings planted in project area
for dust suppression.
• Drills have been fitted with dust extractors.

24. Control measures for noise
• About 36.98 lakh saplings already planted for
noise attenuation.
• High capacity machines like 42 Cum. Shovels &
240 tonne dumpers, to be deployed in mine. This
will ensure reduced number of vehicular trips,
there by reducing noise levels.
• Provision of ear muffs/ear plugs to workers
subjected to noise level above recommended
limits.
• Routine maintenance schedules for machineries
to eliminate noise as far as possible.

25. Control measures for water pollution
• settling tank to treat mine water has been
commissioned.
• oil & grease trap for workshop effluent
treatment has been commissioned.
• mine sumps will act as a water recharge
structure.

26. MINE CLOSURE PLAN
• Mine closure is not something that happens at the end
of a mine’s life, rather mine closure is an ongoing series
of activities starting from the planning stage of a mine
and ending with a suitably restored site that can be
returned to the community.
• The extent of impacts are classified under:-
 Environmental Aspects
 Technical Aspects
 Social Aspects
 Safety Aspects

27. Environmental Aspects
• Hydro-geology
• Reclamation of dumps and adjoining area
• alternate use of land
• rehabilitation and resettlement

29. Technical aspects
• Dump stabilization
• Top Soil Management
• Disposal management of hazardous material

30. Social aspect
• Employment
• Association & Consultation with Stake holders
• Infrastructure and Services

31. safety aspects
• Management of voids, fractures
• Safety of adjoining mines
• Dealing with fire