NKOMATI ANTHRACITE (PTY) LIMITED - Sentula Mining

Environmental Impact Assessment Report: Nkomati Anthracite (Pty) Limited, Madadeni Opencast
Mining Project Page 54
sewage treatment and collection and waste management (water, domestic waste and industrial
waste).
Haul roads will be used for the haulage of overburden material to the stockpiling area and haulage of
run of mine coal to the R.O.M. coal stockpile. Haul roads will also be used by mine personnel vehicle
to access to the opencast pit areas. Access roads will be used by the mine personnel for accessing
the mine area and will also be used by haulage trucks transporting coal from the mine to the destined
clients.
6 . 2 . 2 . 1 . 2 . S e c o n d a r y Ac t i vit i e s
Disposal of Mine Affected Water into the Pollution control dam
A pollution control dam will be constructed during the construction phase of mining. The dam will
comply with all regulatory requirements. The dam will have sufficient capacity to cater for seepage
water from the opencast pit and any dirty water runoff captured by the dirty water diversion trenches
from the dirty water areas of the mine.
All dirty water emanating from the mining area will be contained into the dam. Additional water from a
1:50 year 24-hour rainfall event, captured within the dam and all dirty water areas, will also be
retained within the pollution control dam.
6 . 2 . 2 . 2 P r o c e s s es
No activities warranting a process will be undertaken at the proposed Madadeni Opencast area during
its construction phase.
6.2.3 De c o m m i s s i o n i n g an d C l o su r e Ph a s e
6 . 2 . 3 . 1 Act i vit i e s
6 . 2 . 3 . 1 . 1 . P r i m a r y Ac t i vi t i e s
Filling of final voids
Backfilling and rehabilitation of these voids will be undertaken during the decommissioning phase.
The hards, subsoil and topsoil overburden, stockpiled during the construction phase, will be used to
backfill the final voids. The method of material placement will be placement of hards overburden,
followed by subsoil material and finally a layer of topsoil. Topsoil placement will be as per
recommendation from the soil specialist report. The final void (adit areas) will be filled to surface and
shaped to ensure that the area is free draining.
Rehabilitation of R.O.M. stockpile areas
The R.O.M. coal stockpiling areas will be graded to a depth of 100 mm to remove all carbonaceous
material build-up. In addition to this, the base of the R.O.M. coal stockpile areas will be removed and
disposed of appropriately. Carbonaceous and non-hazardous material from the R.O.M. coal stockpile
will be placed in the bottom of the final cuts prior to backfilling. All material used for the construction
of the R.O.M. stockpile areas foundation will be removed and used for backfilling of the final voids.
The areas will then be ripped to a depth of 100mm, covered with topsoil and seeded.
Rehabilitation of access and haul roads
All access and haul roads that will not be used after mining will be ripped, to a depth of 250mm to
reduce compaction. The area will then be covered with a layer of topsoil before it can be seeded.
NKOMATI ANTHRACITE (PTY) LIMITED COMPILED BY GEOVICON ENVIRONMENTAL (PTY) LTD