Khadakho Mine Planenvironmentclearance.nic.in/writereaddata/District/... · Surguja Belt Archaean...
Transcript of Khadakho Mine Planenvironmentclearance.nic.in/writereaddata/District/... · Surguja Belt Archaean...
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CONTENTS
SL NO CHAPTERS
1.0 GENERAL
2.0 LOCATION AND ACCESSIBILITY
3.0 TOPOGRAPHY AND GEOLOGY
4.0 ESTIMATION OF RESERVE
5.0 DEVELOPMENT AND PRODUCTION PROGRAMME
6.0 RECLAMATION
7.0 STRATEGY FOR PROTECTION OF RIVER COURSE, NALAS, WATER TANK, VILLAGES,IMPORTANT MONUMENTS, IF ANY
8.0 ANY OTHER RELEVANT INFORMATION
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2. LOCATION AND ACCESSIBILITY
Details of the area (with location map)
District and state Koriya Chhattisgarh
Tahsil Bharatpur
Village Khadakho
Khasra no. 107
Lease area (ha) 5.00 ha
Whether the lease area is recorded to
be in forest ( protected or reserved)
No
Ownership/occupancy Government land (Bhujal)
Existence of public road/railway line
if any nearby and approximate
distance)
The mine is connected to Village road via
a 100m long Kachcha road. And
connected to NH–78 at about 50 km and
SH-3 at about 100m.
Topo sheet no 64 E/14
Latitude and longitude Corner Latitude Longitude
A 23°36'11.42"N 81°51'57.72"E
B 23°36'11.34"N 81°52'00.20"E
C 23°36'03.35"N 81°51'59.92"E
D 23°35'57.79"N 81°51'57.40"E
E 23°35'50.43"N 81°51'52.76"E
F 23°35'51.10"N 81°51'51.28"E
G 23°35'59.42"N 81°51'55.82"E
H 23°36'05.26"N 81°51'57.27"E
Land use pattern (forest, agriculture, grazing, barren etc)
Government revenue land, Bhujal
General location and vicinity map (1:5000)
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3. TOPOGRAPHY AND GEOLOGY
Topography:
The lease area is falling in the river bed River Singhor. The sand found in river
bed. The general surface level of the lease area is comparatively lower than the
surrounding. The general surface level is around 520m RL on the river bank.
The drainage location is towards North direction in the lease area.
River and drainage:
The lease area forms the river bed of Singhor River which flow towards north
direction in the lease area. Singhor has its origin in the hills of Bharatpur
tehsil. The Singhor River is the tributary of Banas River. It has medium
catchment area.
Transportation of sand:
The sand is not a in-situ material. It is being carried out by flowing water
during the monsoon every year from various catchment area in Koriya district
and getting accumulated at convenient location like bends, escarpments etc.
And as such the sand of the lease area is a carried material brought from
various locations and getting accumulated at convenient places in the flow
direction from the river. The size of the accumulated sand varies due to the
time factor taken by the river as well as the quantity of low water. The
depositions normally take place on winding course
(bend)/meanders/loops/circuitous journey (of a river) in flow direction.
REGIONAL GEOLOGY
The state of Chhattisgarh constitutes one of the important geological terrains of
the Indian Shield exposing rock sequences from Archaean to Recent.
A crustal scale Central Indian Shear Zone (CIS) trending E-W and passing
through the central part, subdivides the state into two distinct geological
provinces viz., the southern Bastar province and the northern Satpura
province.
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The generalized litho stratigraphic sequence of Chhattisgarh is given below:
Canozoic Recent-Holocene Alluvium
Mid-Pliocene Laterite
Mesozoic Upper Cretaceous- Palaeogene
Deccan Trap
Upper Cretaceous Lameta Group
Palaezoic-Mesozoic Lower Cretaceous
Upper Carboniferous
Gondwana Super group
Proterozoic Meso-Neo Proterzoic
Kimberlite Chhattisgarh Super group, Indravati Group, SabriGroup, Pairi (khariar) group
Mesoproterozoic Pakhal Supergroup
Palaeo-Mesoproterozoic
Kairagarh Group, Abujhmar Group, ChilpiGroup, TulsiDongar Group
Palaeoproterozoic Dongargarh Granite Sonakhan Group, Nandgaon Group, Metamorphites and Granite of BilaspurRaigarh-Surguja Belt
Archaean Palaeoproterozic Bailadila Group, ChhtanagpurGneisic Complex
Archaean Eastern ghat, Supergroup, Bengpal (Sukuma) Group, Unclassified BastaGneissses, Baya Gneisses etc Kondagaon granulite and chanockite, Bhopalpatanam Granulite
Regional geological succession established (GSI 2006) for the area is published
which is as given below with little modification applicable to the sand mine
area and surroundings (environ) under consideration.
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Regional Geological Succession (GSI 2006)
Period Group Formation Major Litho Units
Upper Gondwana
Jabalpur Umia Sandstone, Shale
Jabalpur Clay , Sandstone
Chaugon Clay , Sandstone
Rajmahal Kota Sandstone, Grits, Coal Bands
Rajmahal Basaltic Lava Flows
Mahadeva Maleri Red Clays, Sandstone
Pachmari Red Sand Stone, Clays
------------------------- Unconformity--------------------------------
Lower Gondwana
Panchet Panchet Brown Sandstone, Shales
Damuda Raniganj Sandstone, Shale, Coal Seams
Berraen Measures Sandstone, Ironstone, Shale
Barakar Sandstone, Shale, Coal Seams
Karaharbari Sandstone, Grits, Coal Seams
Talchir Rikba Sandstones
Talchir Geenish Shale
Boulder bed Boulder Bed
Notified Sand mine area is geologically situated in the bed of Singhor River in
Koriya district predominantly comprising older sandstone, exposed forming
bold and rugged topography represented by high hillocks and undulatatory
terrain. Part of the area is peneplained, weathered and extensively occupied by
the alluvial sandy soil cover ranging from 0 to 5m.
Notified sand mine area is geographically situated in the river bed of Singhor.
In eastern part of almost horizontally bedded Gondwana supergroup comprised
of the equivalent of sandstone of Barakar formation. Rocks of Barakar
formation are forming bold and rugged and gently southerly dipping
topography in east of the river. The Barakar formation is almost horizontally
bedded, weathered and extensively occupied by the alluvial soil cover ranging
from almost 0.5 to 4 m. Sand is deposited annually during the monsoon, which
is mostly derived from the older rocks exposed in southern parts of the area.
Sand of the area doesn’t allow exploration and mining by the conventional
methods, owing to the unconsolidated nature of the sand dominantly
comprising fragments of quarts, feldspar. Therefore, the anticipated reserves
can only be classified in Recognized Resources Category.
The proposed sand mine in situated at the Singhor River bed, which originated
upstream terrain at Bharatpur tehsil. It is the tributary of Banas River. It has
medium catchment area. The river bed comprised of unconsolidated alluvial
placer deposit of sand and bajari found along the river bed. The rock
formations thrusting invasion of Singhor is within the Barakar formation of
the Gondwana Super Group rocks.
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Based on the geology consideration thickness of the almost horizontally
deposited sand along the Singhor River is likely to be over 4 m. The sand (0.1
to 2 mm) deposit is mostly without any waste and overburden material and
mostly common unconsolidated angular to sub-angular and sub-rounded
grains mainly of variety of quarts, feldspar and rarely iron oxide minerals, mica
silt (<0.6 mm) grains. Sorted boulders (>25 cm.), Cobbles (6.4 cm to 25.6 cm.)
pebbles (0.4 to 6.4 cm), gravels (0.2 to 0.4 cm) from angular to sub rounded
makes essential part of the alluvial deposits, but at the surface generally sand
and sorted bajari (gravels & pebbles) are seen.
Local Geology:
The river bed comprised of unconsolidated alluvial placer deposit of sand and
bajari found along the river bed. The rock formations thrusting invasion of
Singhor is within the Barakar formation of the Gondwana Super Group. Rocks
of Barakar formation are farming bold and nugged and gently westward
dipping topography in eastern part of the river. The Barakar formation is
almost horizontally bedded without significant exposures. The formation
around the area are weathered and extensively occupied by the alluvial soil
cover noggin from almost 2 m. to 10 m.
Based on the geology consideration thickness of the almost horizontally
deposited sand along the Singhor river is likely to be over 4 to 4.5m. The sand
(0.1 to 2 mm) deposit is mostly without any waste and overburden material and
mostly common unconsolidated angular to sub-angular and sub-rounded
grains mainly of variety of quarts, feldspar and rarely iron oxide minerals, mica
silt (<0.6 mm) grains. Sorted boulders (>25 cm.), Cobbles (6.4 cm to 25.6 cm.)
pebbles (0.4 to 6.4 cm), gravels (0.2 to 0.4 cm) from angular to sub rounded
makes essential part of the alluvial deposits, but at the surface generally sand
and sorted bajari (gravels & pebbles) are seen.
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4. ESTIMATION OF RESERVE
Estimation of reserve:
Unlike other mineral deposits, sand deposits are not in-situ deposits. The
deposition of sand takes place every year during monsoon. The amount of sand
sediment deposition in a particular river stretch may vary year to year
depending upon a number of factors like rain fall in the catchment area, bed
slope, amount of sand excavated from that area etc. Also the thickness of the
sand bed in a particular stretch of a river is not of uniform thickness. So the
methods of reserve estimation generally used for estimation of other mineral
deposit which are in situ deposits cannot be used to estimate the sand reserve.
Sand deposition in the area is not of uniform thickness, the thickness of the
sand bed varies from 3.0 m to 3.5 m. The water level in the proposed mining
area goes up to 3.0-4.0 m below the general sand level in the area during
summer.
The reserve of sand in the proposed mine is estimated based on the following
facts and assumptions:
1. The lease area is 5 ha or 50,000 m2. Average width of the river is 80 m,
Average length of lease area is about 677 m, and average width of notified
area is about 67 m.
2. Sand deposition in the area is not of uniform thickness, the thickness of
the sand bed varies from 3.0 m to 3.5 m. In most of the area it is more than
3.0m. So, the average thickness of sand bed is considered to be 3.0 m for
reserve estimation.
3. Minable reserve is estimated after leaving a layer of 1.0 m along the river
bed
4. As per distance certificate given by Mining office it seems that river bank to
lease area is 10m.
Considering the above facts and assumptions,
The present sand reserve in the lease area 50,000m2 X 3m = 1,50,000 m3
Minable reserve (av. thickness 2m) 50,000m2 X 2m = 1,00,000m3
Annual Replenishment of Sand in the Lease Area:
As per the Ministry and Environment and Forest OM No. J-13012/12/2013-IA-
1I (I) dated 24.12.2013, the annual replenishment of the sand in the lease area
should be sufficient to sustain the mining operation at level prescribed in the
Mine plan.
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The replenishment of sand depends mainly upon the catchment area of the
river, annual rainfall in the catchment area erosion of rocks in the catchment
area etc. The proposed area falls under the river bed of Singhor River.
As stated earlier, the proposed area for sand mining falls under the river bed of
River Singhor. It has a medium catchment area. The average rain fall of the
catchment area of the river varies from 4000-5000 mm. All these factors
indicate that the annual sediments replenishment capacity of the Singhor is
good enough to sustain the proposed production.
Anticipated life of the mine:
As per the Chhattisgarh Minor Mineral Rules, 2015 There is no provision in the
Chhattisgarh Gond Khanij Ret Ka Utkhanan and Vavsaya Viniyaman Nirdesh
2006 and said rules regarding grant of lease for a fixed period as in case of
other mineral minerals.
As the quantity of sand that will be mined every year will get replenished every
year during monsoon, the sand reserve will not get depleted.
5. DEVELOPMENT AND PRODUCTION PROGRAMME
Mining Method
As per the ministry of environment, forest and climate change (MoEF)
Guidelines Sustainable Sand Mining management Guidelines 2016, Mining
Operation Will be done Semi–Mechanized and help of small mining machinery
such as Small loading Machine, dumper, tipper, tractor for loading and
transportation, The bench wise mining cannot be possible in sand mining
because no bench can be maintained in river sand, Sand will be loaded to the
help of local labour & machine such as small Loading Machine.
Due to Continuous accumulation of sand in the area During Rainy Season
there will be not much depletion in the reserve of sand, hence reserve will be
likely to be remaining same every year and in future also, Accordingly five year
production plan can be revised as below.
Development:
The mine is a very small mine and does not require much development work.
Only a ramp of mild gradient of 1 in 15 to 20 will be constructed from approach
road at the river bank to approach the mine.
The excavation of sand will be strictly carried out as per the restrictions
imposed by Chhattisgarh Minor Mineral Rules 2015, Chhattisgarh Gond Khanij
Ret Ka Utkhanan and Vavsaya Viniyaman Nirdesh 2006 and the additional
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conditions imposed by Govt. of Chhattisgarh vide Gazette notification dated
1.11.2013 and as the Ministry and Environment and Forest OM No. J-
13012/12/2013-IA-1I (I) dated 24.12.2013.
The Government of Chhattisgarh has imposed the following restrictions on
river bed sand mining vide Gazette notification dated 1.11.2013:
1. Mining shall not be carried out within 100 m of any bridge/ National
Highway/ State highway.
2. Mining shall not be carried out within 50 m of any natural water
recourse, dam etc
3. Mining shall not be carried out within 3.0 from the banks of the river
4. Mining shall be carried out up to maximum 3.0 m depth or bed rock in
the river
The Ministry and Environment and Forest OM No. J-13012/12/2013-IA-1I
(I) dated 24.12.2013 imposed the following restrictions on river bed mining.
1. The mining activity shall be done manually. 2. The depth of mining shall be restricted to 3m/water level, whichever is
less. 3. For carrying out mining in proximity to any bridge and/or embankment,
appropriate safety zone shall be worked out on case to case basis to the
satisfaction of SEAC/SEIAA, taking into account the structural
parameters, location aspects, flow rate etc. and no mining shall be
carried out in the safety zone so worked out.
4. No in stream mining shall be allowed 5. In case of transportation by road, the transport vehicles will be covered
with taurpoline to minimize dust/sand particle emissions.
Production Programme:
As stated earlier, the sand deposition in the area is not of uniform thickness,
the thickness of the sand bed varies from 3.0 m to 3.5 m. The water level in the
proposed mining area goes up to 3.0- 4.0 m below the general sand level in the
area during summer. It is proposed to skim the sand leaving a 2.0 m thick
layer on river bed. To protect the in stream micro and macro flora, excavation
will be restricted above water level which will not affect the turbidity of the
water. In order to protect the natural permeability and porosity of the filter
material due to compaction of filter zone of river bed, no heavy vehicles and
machine will be used.
Mining Operation Will be done Semi–Mechanized and help of small mining
machinery such as Small loading Machine, dumper, tipper, tractor for loading
and transportation. A ramp will be constructed and will be maintained to
connect the approach road to the mining area.
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Year Proposed Production of sand, m3/year
1st year 60,000
2nd year 60,000
3rd year 60,000
4th year 60,000
5th year 60,000
Transportation Infrastructure:
The sand is generally transported by the consumer in their own tractors,
tippers/dumpers. The capacity of the dumpers generally used is 10 m3. The
mining of sand is mostly carried out in 8 months from November to June. The
mining will be carried out only during the day time i.e. from 8 am to 6.0 pm.
The estimation of average requirement of dumper trips per day and per hour is
given below:
Details
Sand Production/year 60,000m3
No of working days in a year 8X30 240 days
Av. Sand Production/day 60,000/240 250m3
Carrying capacity of dumper 10 m3
Av number of trips required/day 250/10 25
No of working hours/ day 10 hrs
Average no of trips/hour 25/10 2.5
The mine is well connected to village road via a 100m long Kachcha road. The
village Khatouli is connected to NH–78 at about 50 km long Tar road and also
by SH-03 at about 100m. A ramp of gradient 1-15 is proposed to be
constructed for evacuation of sand from the mine. The carrying capacity of the
road is sufficient to take this insignificant traffic of tippers. Also the
requirement of dumpers for transportation of sand is too less only average 2.5
trips/hour, there will be no queuing of dumpers and no large parking space
will be required.
Man Power Deployment:
The mining establishment presents opportunities of employment to various
posts under various cadres viz. supervisor, skilled workmen and unskilled
workmen beside casual workmen. The sand mining will be done Semi-
Mechanise method hence The average daily employment is tabulated below:
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Particulars No. of Workers
1 Supervisor 02
2 Skilled Loaders 05
3 Unskilled Loaders 13 (As per requirement & not more than 50)
Total (average daily employment) 20
These are the estimated number of workers which can be altered as per the
mineral requirements in the market. The workers are supposed to be employed
and paid shift wise. The lessee ensures that there is no violation of Labour Act
and all terms and conditions of employment is fulfilled as per the law.
Use of Mineral:
Sand is a very important mineral for our society due to its many uses. It can be
used for making concrete, filling roads, building sites, brick-making, making
glass, sandpapers, etc. The sand mined from the mine will be mainly used in
construction industry as a fine aggregate.
6.0 RECLAMATION PLAN
The proposed mine is of river bed sand mining and only involves scrapping of
thin layers of sand from the river bed. No pits are proposed to be dug that
need backfilling. Also there will no change in the post mining land pattern.
Plantation is not possible within the lease area as the mine is in the river bed.
However, It is proposed to do some plantation of local species of trees along
the approach road and along the river banks where ever possible.
7.0 STRATEGY FOR PROTECTION OF RIVER COURSE, NALAS, WATER
TANK, VILLAGES, IMPORTATNT MONUMENTS IF ANY
The sand mining is proposed in the river bed of Singhor River. There is no Nalla, water tank, village, important monuments in the close vicinity of the mine which may get affected due to mining activity. The river bed sand mining can cause the following environmental hazards:
• Instream habitat:
The impact of mining may result in increase in river gradient, suspended load, sediment transport, sediment deposition, turbidity, change in temperature, etc. Excessive sediment deposition for replenishment/ refilling of the pits affect
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turbidity, prevent the penetration of the light required for photo synthesis of micro and macro flora which in turn reduces food availability for aquatic fauna. Increase in river gradient may cause excessive erosion causing adverse effect on the in stream habitats.
• Riparian habitat:
This includes vegetative cover on and adjacent to the river banks, which controls erosion, provide nutrient inputs into the stream and prevents intrusion of pollutant in the stream through runoff. Bank erosion and change of morphology of the river can destroy the riparian vegetative cover.
• Degradation of Land:
Mining pits are responsible for river channel shifting as well as degradation of land, causing loss of properties and degradation of landscape.
• Lowering of groundwater table in the floodplain area:
Mining may cause lowering of riverbed level as well as river water level resulting in lowering of groundwater table due to excessive extraction and draining out of groundwater from the adjacent areas. This may cause shortage of water for the vegetation and human settlements in the vicinity.
• Depletion of groundwater:
Excessive pumping out of groundwater during sand mining especially in abandoned channels generally result in depletion of groundwater resources causing severe scarcity and affecting irrigation and potable water availability. In extreme cases it may also result in creation of ground fissures and land subsidence in adjacent areas.
• Polluting groundwater:
In case the river is recharging the groundwater, excessive mining will reduce the thickness of the natural filter materials (sediments), infiltration through which the ground water is recharged. The pollutants due to mining, such as washing of mining materials, wastes disposal, diesel and vehicular oil lubricants and other human activities may pollute the ground water.
• Choking of filter materials for ingress of ground water from river:
Dumping of final material, compaction of filter zone due to movement heavy machineries and vehicles for mining purposes may reduce the permeability and porosity of the filter material through which the groundwater is recharging, thus resulting in steady decrease of ground water resources. The following measures shall be taken to mitigate the adverse impact of mining on the river:
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