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Selection of Mine Layout Towards Management of Uranium Waste:
An Indian Experience
D. AcharyaA.K. Sarangi
Uranium Corporation of India ltd.
SINGHBHUM BELT IN JHARKHAND
NALGONDA DISTRICT IN ANDHRA PRADESH
YSR (CUDDAPAH) DISTRICT IN ANDHRA PRADESH
WEST KHASI HILLS DISTRICT IN MEGHALAYA
Uranium Mining Centers of India (Existing & Proposed)
YADGIRI DISTRICT IN KARNATAKA
•Dissimilar geological settings
•Small size deposits, occurring as cluster
•Advantage of similar orebody configuration
Banduhurang
TuramdihNarwapahar
BhatinJaduguda
BagjataI
IIIII
IV
OMG
Alluvium
Schist & Quartzite
Mayurbhanj Granite/Singhbhum Granite
Metabasics/Conglomerate/Quartzite
Soda Granite & Granophyre
Uranium Deposits and OccurrencesCopper Deposits: I. Roam-Rakha,II.Surda,
III.Mosabani, IV.Badia
0 5 10 km
TATANAGAR
220
15’860 45’
230
00’860 45’230
00’850 30’
850 30’220
15’
Mohuldih
Operating mines at Jaduguda, Bhatin, Narwapahar, Turamdih, Bagjata, Banduhurang and Mohuldih Plants at Jaduguda and Turamdih
Uranium Mining in SSZ
• Seven mines feed two process plants• Process plants at logistically optimised
locations.• Tailing ponds located close to the process
plants in topographically suitable sites.• Conveyor transport of ore from mines located
within the same complex as the mills.• Ore transport from other mines to plants in
covered trucks.
Uranium Mining in SSZ
Mining Layout in SSZ• Cut & Fill mining method is selected on ore geometry:
•Irregular lenticular ore body•Moderate dip: ~350, Stability of hangwall is ensured by fill material.
•Trackless mining with decline entry to mine and ramp access to stopes:
•Early start of production•Movement of equipment between levels/ stopes•Ease of handling waste rock generated from development face to stope•Flexibility in selection of waste rock disposal area in underground.
Mining Layout in SSZ
Mining Layout in SSZ
•Waste rock generated during development is aresource- It augments tailing sand used as fillmaterial.•Use of waste rock as fill material in stopesreduces environmental impact on surface:
•Land utilized for waste rock dump isminimised•Environmental impact of waste dump & costof rehabilitation of dumps are reduced.
•Generation during mine development & between lenses.•Low grade ore generates large volumes of tailing sand.•Waste rock is stored in designated waste rock dumps.•Tailings storage in engineered Impoundment Facilities
Generation of Waste
A Typical Underground Mine Layout
• A decline and a shaft as mine entries.•80 ramp as stope access•Ventilation raises at 200m distance define a stope block
Generation of Waste
Waste dumps and Tailing Ponds are located and designed as per approval of regulatory authorities
•Atomic Energy Regulatory Board•Ministry of Environment & Forest•Director General of Mines Safety
Storage of Waste Dumps
Selection of Site: The waste dump location is decided so as to avoid/ minimise impact on the following:
•Ore reserve•Water bodies, habitation, agricultural land etc
The potential hazards to be considered during and after the active life of the dump:
•Slope stability•Dust•Noise (during the active life)•Water run-off
Storage of Waste Dumps
Rehabilitation Objective•To ensure long term stability & integrity of the structure without human intervention.•To minimise rate of release of solid, liquid and gaseous effluents.
Methodology of waste dump reclamation
• Limiting the height of the dumps to 5m only• Limiting the slope of the dumps to 280
• Ensuring proper compaction• Laying & compacting of soil cover for 30 cm
thickness• Grass turfing over compacted soil• Garland drain around waste dump area• Diverting the water for industrial use• Greenbelt around the area with indigenous species
Selection of Type of Vegetation
Plantation should meet following criteria•Horizontal growth of the plants•High bio-mass production•Self sustaining•Low water requirement•Preferably not edible by man & animal•Root penetration less than 30cm•Should not cause cracks and fissures on surface
0.0
0.5
1.0
1.5
2.0
0 30 50 70
Gam
ma
Leve
l (mG
y/hr
)
Soil thickness (cm)
Road
Fence around the area
Garland drainWaste Dump area after reclamation
Drain
Water pit Earthen
Bund
Water pumped to Mine Water Pond > ETP > Plant for reuse
Water Management