Pre-Feasibility Reportenvironmentclearance.nic.in/writereaddata/Online/...It is proposed to plant of...

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


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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.


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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.


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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.


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Figure 1.1: Mine Location Map Toposheet


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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.


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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


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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.


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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.


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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.


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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,


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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

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