Overview
| Stage | Production |
| Mine Type | Underground |
| Commodities |
|
| Mining Method |
- Longitudinal open stoping
- Sub-level open stoping (SLOS)
- Transverse open stoping
- Paste backfill
|
| Production Start | ...  |
| Mine Life | 15 years (as of Jan 1, 2021) |
Zawar Mines consists of four mines namely Mochia, Balaria, Zawar Mala and Baroi.
A successful public hearing was conducted during the year for the Expansion of Zawar Mines from 4.8 million TPA (Tones per annum) to 6.5 million TPA and Beneficiation from 4.8 million TPA to 7.3 million TPA. |
Source:
p. 7,78
Hindustan Zinc Limited (HZL) owns and operates a fully integrated zinc-lead business. HZL is one of the world's largest integrated zinc-lead producer by volume. Vedanta Limited, an India-listed susidiary of Vedanta Resources Limited, owns 64.9% of the share capital of HZL, while the Government of India remains an equity partner and holds a 29.5% stake. HZL is listed on Indian stock exchanges (NSE and BSE).
Contractors
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Summary:
All the deposits at Zawar are hosted by epizonal metamorphosed dolomites of the Tiri Formation, Aravalli Supergroup (1.7 – 1.8 Ma), either in north-south structures (Post-Aravalli orogeny) or in W-E structures (Delhi orogeny). The mineralisation comprises sphalerite and galena as disseminations or veinlets in bodies defined by grade contacts only. Silver mineralisation has been concentrated in the upper levels of the mines which have been depleted either by historical mining of earlier modern mining. The deposits are either tabular, steeply northeast-dipping and west-plunging (Mochia and Balaria), or complex-shaped lenses following the Northern plunge of a fold-axis (Zawarmala). At Baroi, mineralisation is largely disseminated and organised in poorly constrained Northwest dipping bodies.
The deposits are considered to be syn-metamorphic stratabound carbonate-hosted (dolomite) lead-zinc deposits (Mississippi Valley Type in the wider sense). There are minor cross cutting post-mineralisation intrusives of Precambrian and Cretaceous age. The deposits have the following general geometry:
• Mochia Central: strike: 1,050m E – W, consisting of 8 lenses; lenses strike 60 - 200m; Dip 80-85º towards the S; Width 2-45m; dominant plunge of 50-60º towards the SW.
• Mochia West: strike: 1,800m E – W, consisting of 32 lenses; lenses strike 60 – 150m; Dip 80-85º towards the S; Width 2 – 20m; dominant plunge of 50-60º towards the SW.
• Balaria Central: strike: 1,05 ........
Mining Methods
- Longitudinal open stoping
- Sub-level open stoping (SLOS)
- Transverse open stoping
- Paste backfill
Summary:
Mining methods implemented at the four operations are the same with an underground sub level open stoping mine extraction with backfill.
Sub-level Open Stoping (Longitudinal & Transverse)
The litho-environment is competent and self-supporting and thus allows for adoption of open stoping mining method. Longitudinal & Transverse sub-level open stoping method of mining shall be continued with some variants for optimizing mine development quantum, enhancing mechanization, productivity and optimizing ore recovery during Mining Plan and Conceptual Mining period. The various modifications for improvement are as follows:
- Ramp connectivity from Surface at all mines, connecting various levels & sub-levels thus allowing high level of mechanization for development, drilling and ore hauling. The decline from surface allows greater flexibility in operation as it is possible to lower down mining equipment through it. It will enable additional ore hoisting capacity and faster man & material movement to UG location.
- Use of remote control LHD for mucking operation allowing mining of ore being blocked in trough pillars and improving blasted ore recovery into stopes.
- Hauling of ore / waste from underground to surface through 60T/30T/20T LPDTs.
- Sublevel stoping with post backfilling.
Mochia Mine
The sequence of stoping involves creation of 80 m wide stopes leaving 20m/25m wide pillars in between two stope panels up to 57mRL. The stopes b ........
Source:
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Flow Sheet:
Summary:
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Reserves at March 31, 2022:
The Mineral Resources are reported at a ZnEQ COG of:
- Balaria 3.36%;
- Baroi 2.56%;
- Mochia 2.67%;
- Zawarmala 3.44%.
| Category | Tonnage | Commodity | Grade | Contained Metal |
|
Proven & Probable
|
37.9 Mt
|
Zinc
|
2.8 %
|
1,062 kt
|
|
Proven & Probable
|
37.9 Mt
|
Lead
|
1.2 %
|
452 kt
|
|
Proven & Probable
|
37.9 Mt
|
Silver
|
23 g/t
|
28,160 koz
|
|
Measured & Indicated
|
36.8 Mt
|
Zinc
|
3.4 %
|
1,236 kt
|
|
Measured & Indicated
|
36.8 Mt
|
Lead
|
2 %
|
726 kt
|
|
Measured & Indicated
|
36.8 Mt
|
Silver
|
28 g/t
|
33,532 koz
|
|
Inferred
|
79.3 Mt
|
Zinc
|
3.6 %
|
2,852 kt
|
|
Inferred
|
79.3 Mt
|
Lead
|
2.1 %
|
1,695 kt
|
|
Inferred
|
79.3 Mt
|
Silver
|
34 g/t
|
87,051 koz
|
|
Total Resource
|
116.1 Mt
|
Zinc
|
3.5 %
|
4,088 kt
|
|
Total Resource
|
116.1 Mt
|
Lead
|
2.1 %
|
2,421 kt
|
|
Total Resource
|
116.1 Mt
|
Silver
|
32 g/t
|
105,583 koz
|
Corporate Filings & Presentations:
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