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SHINGEHA- GAMNOM CHROMITE MINES RAMCO
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Pre-Feasibility Report
Shingeha-Gamnom Chromite Mines
Village: Shingeha-Gamnom, Ukhrul District, Manipur
Mining Lease Area: 85 ha.
Production Capacity: 9100 tons per annum
M/s Rourkela Minerals Company Private Ltd. (RAMCO)
Power House Road, Rourkela 769 001, Odisha
SHINGEHA- GAMNOM CHROMITE MINES RAMCO
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1 EXECUTIVE SUMMARY
The mining lease area over 85.0 ha has granted mining lease in favour of
Rourkela Minerals Company Private Limited (ROMCO), is located in
Shingeha- Gamnom village, in Ukhrul district of Manipur State and is
featured in Topo-sheet No. 83 K/8. The granted lease is bounded between
Longitude 94°26’46’’ - 94°27’30’’ and Latitude 25°00’39’’ - 25°01’21’’
The ML area is devoid of any forest land or agricultural land; entire land is
categorised as unclassed Govt. land.
The Geological Probable reserve of float ore zone is estimated to be 79,959
tones and proved reserve is 1272 tones. Therefore, the total geological reserve
is 81231 tones and mineable reserve is also 81231 tones.
The production capacity of the mine is 9100 tons per annum. Based on current
exploration data, the life of the mine is 9 years.
The operation of mine will be fully manual by opencast method of mining
with an objective to produce 9100 (maximum) tones per annum. Dumper/
trippers will be utilized for shifting ore and overburden to respective sites.
Drilling and blasting will be conducted to dislodge the OB and ore body.
During plan period, 28444 m3 of mine overburden and inter-burden will be
generated. During conceptual period, 33854 m3 of mine overburden and inter-
burden will be generated.
The waste dump site is selected on the south-west side of the ML area, which
barren and spread over 2.0 ha. The height of the during proposed plan period
will be 5m and overall slope of 28°.
Total ML area is 85.0 ha and entire area is unclassed Govt. land. During the
plan period 9.07 ha and during conceptual period 27.09 ha land will be used
for various mining purpose.
It is proposed that at the end of 5 year plan period 4.07 ha and 8.90 ha at the
end of conceptual period will be degraded for quarry purpose. The mined out
area will be reclaimed, once it is proved no ore will occur below UPL. In case
ore occurs below UPL, mining will be continued till it is proved that no ore
shall be continued. At the end of life mine, the broken up area will be
reclaimed and rehabilitated.
The average water requirement is 6.5 KLD and peak demand is 10.25 KLD.
Water will be sourced from ground water.
About 43 miners are proposed to appointment. Apart from 19 numbers of
personnel is also required for this mine.
SHINGEHA- GAMNOM CHROMITE MINES RAMCO
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The safety zone around the ML area and dead end of the OB dump will be
utilised for plantation. It is proposed to plant of 3.332ha land and 5331 sapling
in the Plan period.
Project Cost is estimated to be XXX crores during Plan period.
SHINGEHA- GAMNOM CHROMITE MINES RAMCO
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2 INTRODUCTION OF THE PROJECT/ BACKGROUND INFORMATION
2.1 OVERVIEW
M/s Rourkela Minerals Company Private Limited (ROMCO) was established
in the year 1987. It has set up modern facilities of manufacturing for
procurement of powder from mineral, ferrous and non-ferrous metals and its
slag, processing, calcining, reducing, amalgamating, dressing, refining,
composing all types of minerals and minerals rejects to make them marketable
and usable as industrial raw materials. It has present manufacturing capacity
of 30,000 tonnes per day.
M/s Rourkela Minerals Company Private Limited had applied for grant of
Mining Lease for Chromite over 85 ha situated in village Shingeha- Gamnom
in Ukhrul district of Manipur State. The State Govt. with respect to Govt. of
India letter dated 05th Sept. 2007 communicated their decision their decision
for granting the applied area over 85 ha vide letter No. D(5)- 60/IND-2205
dated November 7,2007 in favour of ROMCO after compliance /fulfilment of
the formalities / requirement as per relevant provision of the Mines &
Minerals (Development & Regulation) Act 1957 and Mineral Concession Rules
1960. The State Govt. has decided to grant the mining lease in favour of
ROMCO (Refer Annex-1 ML grant letter).
2.2 LOCATION
The 85 ha mining lease is located in Shingeha- Gamnom village, in Ukhrul
district of Manipur State and is featured in Topo-sheet No. 83 K/8. The
granted lease is bounded between Longitude 94°26’46’’ - 94°27’30’’ and Latitude
25°00’39’’ - 25°01’21’’ (Refer Map Figure-1). The ML area is approximately 82 km
by road from Imphal. The nearest town is Kamjong about 30 km from the ML
area. The nearest railway station is Dimapur, is about 255 km the ML area.
SHINGEHA- GAMNOM CHROMITE MINES RAMCO
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Figure 1.1: Mine Location Map Toposheet
SHINGEHA- GAMNOM CHROMITE MINES RAMCO
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2.3 GEOLOGY AND RESERVE
2.3.1 Geology
The area around Gamnon showing chromite mineralization is a hilly terrain
having mixed gradients. The area is mostly occupied by ultramafics of
ophiolites suit of rock and structurally disturbed, chromite mineralization has
taken place due to re-mobilization. The chromite mineralization has taken
place along the general trend of the ultramafics.
The major part of the area is covered with ultramafics of ophiolites suite. The
litho-units encountered in the area are alluvium soil, harzburgite &
serpentinsed harzburgite in which chromite ore bodies and chromite float ores
are exposed.
The initial geological exploration study reveals that Hard Lumpy and Massive
Ore (HLMO) trending NNE-SSW over a strike length of 5 to 6m with an
average width of 3 to 4m. The recovery of refractory grade (HLMO) is almost
90%. The thickness will be about 3m. Float chromite ore with a thickness of 1.0
to 1.5m having recovery of 30% has also been encountered in the ML area.
2.3.2 Geological Reserve
The Geological Probable reserve of float ore zone is estimated to be 79,959
tones and proved reserve is 1272 tones. Therefore, the total geological reserve
is 81231 tones and mineable reserve is also 81231 tones.
Mineable Reserve
Proved and probable reserves of chromite ore both are considered as mineable
reserve, because:
The safety zone (7.5 m along the ML boundary) does not affect the
mine working;
Sufficient place towards all sides of the probable zone limit is vacant to
find place at outer limit of the pit/quarry that shall be worked to raise
ore;
Bench slope can be maintained safety.
2.3.3 Grade
The podiform chromite occurs in the area and they range from 5m x 2.5m to
30m x 10m in dimension. The grade of Hard Lumpy Massive Ore (HLMO)
varies from 30% to 60% Cr2O3, whereas, lower grade ore also be available and
varies from 10% to 30% Cr2O3.
2.3.4 Production Capacity & Life of the Mine
The targeted production capacity of the mine is 9100 tons per annum. Based
on current exploration data, the life of the mine is 10 years.
SHINGEHA- GAMNOM CHROMITE MINES RAMCO
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2.4 EXPLORATION
The Chromite mineralization in the form of pods is encountered in the mild
gradient of the hill range of the Gamnon block. The chromite pods are
irregular in distribution but controlled by lithology as well as structures. The
massive chromite pods are aligned along the litho contacts and found in the
upper part of the hill and break-in slopes of the spurs. Keeping these features
in view, the further exploration has been proposed:
Cross trenches: 14 no. of cross trenches- (10 m length x 3m width x 6 m
depth)
Bore holes: Planned at 200m x 200m grid interval and bore holes to be
drilled up to 50 m depth. 26 bore holes planned during plan period.
2.5 USE OF MINERALS
Refractory is a product which is hard to work with, and are especially
resistance to heat and pressure. The products are used for high temperature
insulation and erosion/ corrosion and made mainly from non-metallic
minerals. The principal application of Refractories are steel industries, cement,
glass, non-ferrous metals, petro-chemicals and fertiliser industry, chemical,
ceramics and even thermal power station and incinerators.
Various types of Refractories presently manufactured in India for application
in different industries. Those main items are Basic Refractories, High Alumina
and Allied Refractories, Insulation Bricks, Monolithics, Gunning Mixes,
ramming Masses, Refractory Plastics, etc.
Chrome Magnesite is a basic refractory product. The range of general purpose
varieties is suitable for back up application, reheating furnace and other non-
ferrous industries.
The chromium ore will be utilised in the refractory industries. The wide
spectrum of sophisticated Refractories is being produced in the Sarvesh Plant
(a sister concern of ROMOCO) at Kuarmunda of Sundergarh District of
Odisha. Major consumers in India are the following to whom Sarvesh supplies
Refractories manufactured for which chrome ore is raw material.
Magchrome Dunite for Ladle Safety lining- Alloy Steel Plant Durgapur,
Essar Steel, Surat and Usha Martin Industries, Jamshedpur;
Direct Bonded Magchrome Bricks for LD Permanent Lining- Bhilai Steel
Plant, Bhilai
Chrome-Magnesite (Sc) Bricks for EAF- GontermannPeipers (I) Ltd., Field
Gun factory, Kanpur, Haryana Steel & Alloys, Murthal.
2.6 EMPLOYMENT POTENTIAL
Considering highest excavation including HLMO from the mines is in the 3rd
year, i.e. 10018 m3, 300 working days in year, 34 m3 materials will be handled
daily. Keeping output per man shift at 0.8 m3 per day, about 43 miners are
SHINGEHA- GAMNOM CHROMITE MINES RAMCO
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proposed to appointment. Apart from 19 numbers of personnel is also
required for this mine.
2.7 PROJECT COST
Project Cost is estimated to be XXX crores during Plan period.
SHINGEHA- GAMNOM CHROMITE MINES RAMCO
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3 PROJECT DESCRIPTION
3.1 MINING
The operation of mine will be fully manual by opencast method of mining
with an objective to produce 9100 (maximum) tones per annum. Dumper/
trippers will be utilized for shifting ore and overburden to respective sites.
Drilling and blasting will be conducted to dislodge the OB and ore body. The
sizing of ore will be done through manually or by secondary blasting.
Shorting and loading will be manually. Ore will be dispatched through trucks.
On the exposure
3.1.1 Mining during Plan Period
There are eight exposures of chromite ore, towards east and central zone of
the Ml area, numbered as 1 to 8. It has been proposed to mine on the exposure
number 1 to 3 and 5 to 7 during the 5 year Plan period. It is also proposed to
go down 3m below the surface, up to which chromite ore is expected to
continue.
The targeted annul production is 9100 tons. The total ore will be produced
during plan period is 37493 tons and production varies from 4644 tons (1st
year) to 9058 tons (5th year). The average striping ration is 1: 0.76. The year
wise production details are as follows:
Table-2.1: Year wise production details during Plan period
Year No. of
Benches
Length & Width of
Quarry
Volume of
ROM (m3)
Quantity of
Ore (tons)
Volume of
waste (m3)
1st 1 100 m x 50 m 1554 4644 3492
2nd 1 140 m x 60 m 2633 7861 5863
3rd 1 170 m x 50 m 2631 7866 5938
4th 1 110 m x 80 m 2694 8064 6152
5th 1 100 m x 100 m 3022 9058 6999
3.1.2 Mining during Conceptual Period
Presently with geological mapping of the area, 8 nos. of lensoid pocket
deposits of chrome ore with float ore surrounding these have been established
with proved depth of 1m from surface level for the float ore zone. Based on
these information conceptual mining has been prepared. Further exploration
has been proposed during plan period, all probability, further knowledge
about deposit and accordingly conceptual mining plan will undergo changes
as required, which will be submitted in the subsequent mining scheme. The
conceptual mining information is provided in following table.
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Table-2.2: Conceptual Mining Details
Year No. of
Benches
Length & Width of
Quarry
Volume of
ROM (m3)
Quantity of
Ore (tons)
Volume of
waste (m3)
1st 1 320 m x 280 m 14457 43338 33854
3.2 EXTENT OF MECHANISM
The mine will be totally manual with deployment of 2 numbers
dumper/trippers (10 tons), 2 tractors mounted compressors, 4 jackhammers,
one water tanker (10 Kl) and 2 jeeps.
3.3 MINE WASTE MANAGEMENT
3.3.1 Waste Generation
During plan period, 28444 m3 of mine overburden and inter-burden will be
generated. During conceptual period, 33854 m3 of mine overburden and inter-
burden will be generated.
3.3.2 Waste Dump & Management
The waste dump site is selected on the south-west side of the ML area, which
barren and spread over 2.0 ha. The height of the during proposed plan period
will be 5m and overall slope of 28°. The dump can accommodate 2.0 lakh m3
waste materials up to 10 m height.
Retaining wall and garland drain around the dump site will be provided to
prevent wash off from the dump. Catch drain in individual terraces will be
provided to prevent gully formation and each catch drains will be connected
to garland drain. A sedimentation tank will be provided to arrest the
sediments. In course of time, dead end of the dump will be utilised for
plantation.
3.4 DRILLING & BLASTING
Chrome ore body need to be dislodged from the benches by drilling and
blasting prior to excavation and loading. The most common types of
explosive, i.e. slurry and booster charge and ammonium nitrate, aquadine,
superdyne, fuel oil mixture (ANFO) will be used in mines. A portable
magazine of 50 kg capacity will be installed in the lease area.
3.5 MINE DRAINAGE
The proposed mine is situated on hilly terrain. There is perennial nala passing
in and around the ML area. Three seasonal nala is passing through the ML
area. However, the proposed mining activity will not affect as the mine
working zone is far away from nala.
SHINGEHA- GAMNOM CHROMITE MINES RAMCO
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The proposed mine will not cut the ground water and water level is much
below ultimate working table.
To control the rainwater, catch drains are planned around the waste dump
and quarry. Rain water will be diverted to sedimentation tank. After
treatment, water will be discharged into the local nala.
3.6 LAND USE
Total ML area is 85 ha and entire area is unclassed Govt. land. During the plan
period 9.07 ha and during conceptual period 27.90 ha land will be used for
various mining purpose. The land use break up is provided in table below:
Table 2.3: Proposed Land Use Land use Plan Period (ha) Conceptual Period (ha)
Area under mining/quarry 4.07 8.90
Storage of top soil 0.00 0.00
Waste dump 2,00 14,00
Mineral storage 1.00 2.00
Infrastructure with magazine 1.00 1.00
Roads 1.00 2.00
Sub-total 9.07 27.09
Safety zone 2.832 2.832
Undisturbed area 73.098 54.268
Total 85.000 85.000
3.7 MINED OUT LAND AND MINE CLOSURE
It is proposed that at the end of 5 year plan period 4.07 ha and 8.90 ha at the
end of conceptual period will be degraded for quarry purpose. The mined out
area will be reclaimed, once it is proved no ore will occur below UPL. In case
ore occurs below UPL, mining will be continued till it is proved that no ore
shall be continued.
3.8 WATER REQUIREMENT & SOURCING
The average water requirement is 6.5 KLD and peak demand is 10.25 KLD.
Water will be sourced from ground water.
3.9 GREENBELT & AFFORESTATION
The safety zone around the ML area and dead end of the OB dump will be
utilised for plantation. Year wise planation details is provided in the following
table.
Table 2.4: Year wise Plantation details Year Location Area (ha) No. of trees to be planted
1st Safety zone 0.560 896
2nd Safety zone 0.560 896
3rd Safety zone 0.560 896
4th Safety zone & dump 0.560 896
5th Safety zone & dump 1.092 1747
Total 3.332 5331
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3.10 FACILITIES
The ML area is well connected by the road. Market, postal, medical, schooling,
etc. are available in the Kamajong, about 30 km from ML area. Statutory and
essential infrastructure like rest shed, blasting shed, first aid centre, crèche ,
canteen, latrine/urinal for both male and female workers, drinking water
facilities, etc will be provided within the ML area.
SHINGEHA- GAMNOM CHROMITE MINES RAMCO
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4 EXISTING ENVIRONMENT, POTENTIAL IMPACT & MITIGATION
MEASURES
4.1 LAND ENVIRONMENT
4.1.1 Land Use
The total mining lease is 85.0 ha; and entire land is unclassed Govt. land.
During plan period, approximately, 9.07 ha and during conceptual period,
27.09 ha of land will be utilised for various mining purposes.
The mined out land will be progressive reclaimed and rehabilitated by
backfilling and same will be utilised for plantation purposes. OB dump will be
stabilised and same will be utilised for plantation.
4.1.2 Soil Quality
The soil in this area ranges from brown to reddish brown in colour; while the
texture ranges from clayey loam to loam. The pH ranges from 6.16 to 9.53. The
soil is porous with sufficient water holding capacity to support plant growth.
The organic matter content is high.
4.2 AIR ENVIRONMENT
There is air polluting industries in the study area. The sources of air emission
are fugitive emission from road and emission from traffic, fuel wood burning
and jhum-cultivation (burning of vegetation).
During mining activity, fugitive dust is likely to be generated from drilling,
blasting, excavation, loading & unloading of ore and mine waste and
vehicular movement in the haul road.
The fugitive dust emission will be controlled through periodic water
sprinkling in the mine haul road. The greenbelt in the safety zone will be
developed.
4.3 NOISE ENVIRONMENT
There is no noise generating industries in the study area. The major source of
noise is traffic noise in the main road.
The potential impact on noise quality is due to drilling & blasting, and
movement of vehicles in the mine.
The maintenance of vehicle and greenbelt in the ML area will minimise the
noise impact.
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4.4 WATER ENVIRONMENT
4.4.1 Drainage & Surface Water Quality
There is no perennial stream within the ML area, however, three seasonal
nalas area passing through the ML area. The proposed mining activity will not
affect these nalas.
The surface runoff from waste dump site and mined out area is potential to
impact on receiving surface water bodies.
The runoff water from dump will be diverted to sedimentation tanks through
catch drains and garland drain. The suspended solid will be settled in the
sedimentation tank, after that water will be discharged into the nala. There
will be no contamination of hexavalent chromium (Cr+6) on the surface water
runoff from the mine and that flowing over the dumps since the ore to be
raised is lumpy in nature.
4.4.2 Hydrology & Ground Water Quality
In this area, ground water occurs under unconfined conditions in the mantle.
The aquifers area mainly composed of peridotite rocks. The harzburgite and
ophiolites are not very much porous in nature. Therefore, water catch within
the crack are not enough.
The proposed mine will not intersect the aquifer. The ground water pollution
in the mining areas either due to percolation or precipitation is not likely to
occur, because possible control measures shall be taken for checking possible
water pollution. The contamination of hexavalent chromium (Cr+6) on the
ground water regime will not be there due to lumpy nature of the ore to be
raised.
4.5 ECOLOGY & BIODIVERSITY
The peak is part of Shirui – Kashong range which is 2570 m in height and has
a habitat of rare and endangered species of lily called “Siroy Lily” (Lilium
mackliniae) which is locally called Shirui kashung Timrawon or Shirui lily in
Manipuri. Shirui Lily habitat is approximately, 12 km (aerial distance) from
the ML area. There is no ecologically sensitive habitat like National Park,
Wildlife Sanctuary within 10km radius of the ML area.
The ML is situated in the unclassed Govt. land, there are few tress within the
ML area, mainly bushes and grasses are seen in the ML area.
The clearance of vegetation may have impact on flora of ML area and
generation of dust and deposition in the nearby area may have impact on
vegetation. Noise and vibration due to mining activity may have impact on
local fauna,
SHINGEHA- GAMNOM CHROMITE MINES RAMCO
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The development of greenbelt in the safety zone and dead end of OB dump,
dust suppression and noise mitigation measures will be taken to minimise the
impact on ecology & biodiversity of the area.
4.6 SOCIO-ECONOMIC ENVIRONMENT
There is no settlement within the ML area. There are small villages in the
study area. There is no R&R issue due to proposed mining activity.
Due to proposed mining activity, some direct employment and job
opportunity will be created. The lessee will do the CSR activity in the nearby
villages as per Govt. norms.
CONTENTS
1 EXECUTIVE SUMMARY 1
2 INTRODUCTION OF THE PROJECT/ BACKGROUND INFORMATION 3
2.1 OVERVIEW 3
2.2 LOCATION 3
2.3 GEOLOGY AND RESERVE 5
2.3.1 Geology 5
2.3.2 Geological Reserve 5
2.3.3 Grade 5
2.3.4 Production Capacity & Life of the Mine 5
2.4 EXPLORATION 6
2.5 USE OF MINERALS 6
2.6 EMPLOYMENT POTENTIAL 6
2.7 PROJECT COST 7
3 PROJECT DESCRIPTION 8
3.1 MINING 8
3.1.1 Mining during Plan Period 8
3.1.2 Mining during Conceptual Period 8
3.2 EXTENT OF MECHANISM 9
3.3 MINE WASTE MANAGEMENT 9
3.3.1 Waste Generation 9
3.3.2 Waste Dump & Management 9
3.4 DRILLING & BLASTING 9
3.5 MINE DRAINAGE 9
3.6 LAND USE 10
3.7 MINED OUT LAND AND MINE CLOSURE 10
3.8 WATER REQUIREMENT & SOURCING 10
3.9 GREENBELT & AFFORESTATION 10
3.10 FACILITIES 11
4 EXISTING ENVIRONMENT, POTENTIAL IMPACT & MITIGATION
MEASURES 12
4.1 LAND ENVIRONMENT 12
4.1.1 Land Use 12
4.1.2 Soil Quality 12
4.2 AIR ENVIRONMENT 12
4.3 NOISE ENVIRONMENT 12
4.4 WATER ENVIRONMENT 13
4.4.1 Drainage & Surface Water Quality 13
4.4.2 Hydrology & Ground Water Quality 13
4.5 ECOLOGY & BIODIVERSITY 13
4.6 SOCIO-ECONOMIC ENVIRONMENT 14