Social Responsibility
Environment protection is one of the prior objectives of RMG.
Extraction of mineral resources by quarrying shall certainly cause environmental impact to the area, which is expressed in disturbance of vegetation cover and landscape. Vegetative cover of the territory used for quarries is presented by deciduous forest and bushes. The amount of trees that are to be cut down is measured and adequate compensatory reforesting is carried out on the territories determined by the National Forest Agency of Georgia.
 
Since the introduction of RMG to the industrial market, certain arrangements have been carried out in the field of environment.
Since 2012, a new structure of health, safety and environment service has been established. Company has developed a new environmental policy. Chemical laboratory of the company has been equipped with modern express analyzers for determining heavy metals, cyanides and sulfate ions composition in water and air. Daily monitoring has been carried out regarding the following:

  • Water disposal;
  • Emission into the atmosphere;
  • HCN gas volume;
  • Waste rock sites;
  • Pipelines' integrity;
  • Tailings;
Description of Acid Mine Drainage Water

Water running into and drained from the quarry is characterized with high content of metals and acidity.
Excavated from the quarry mineralized waste rock spread out on the surface, makes influence on waste water quality extracted from the quarry bottom.
Acid mine drainage waters represent sulfate hydrous solutions of heavy metals  
that are stipulated by hydro geological specifications of the deposit and exogenetical and microbiological factors developed over the deposit. Main part of these waters, including acid mine drainage water pumped out from the quarry bottom,is localized in the dam arranged to the west of the deposit, within the Kazretula River ravine.

Technology of Purification of Acid Mine Drainage and Copper Cementation

Acid mine drainage water purification and copper extraction is carried out by means of cementation technology. Further lime is added to the purified water which maintains acidity level and transferring of remaining sulfate-ions into insoluble admixture. Then the mentioned solution is pumped into the tailings dam. Later this water is used as back water for technological process of the copper plant.

Ground Waters of the Region

Ground waters are not extracted for the project use and since all technologies represent a closed cycle, waste water is not discharged into ground waters.

Production of Gold

HCN gases are inspected weekly around the heap leach platforms, which are observed in insignificant amounts. Pursuant to the professional Health Safety Manual, HCN gas concentration in safe working conditions should be less than 5 ppm.
Water used on the site is fully localized. Main drain pond has been designed and constructed in such a way to admit two times more than average maximum amount of two month-rainfall (215mm), or 430mm precipitation.

In case if precipitation is extremely higher, so that water overflows from the pond, the cyanide concentration in the water will be so low that will not cause harm to the environment.

Water Quality Monitoring

Environmental division of the Company is carrying out daily monitoring of water quality, to demonstrate that water is free from cyanide or various metalocomplexes of cyanide or heavy metals. There have been 4 points selected around the open quarry for sample collection that are in hydraulic continuity with open quarry waters:

Point №1: Water discharged from waste dam towards the west of the open quarry, to the riv. Kazretula.
Point №2: At the junction of the riv. Kazretula and the riv. Mashavera;
Point №3: On the riv. Mashavera, in Bolnisi;
Point №4: On the spring running to the riv. Mashavera to the East of the open quarry;


Description of Water Circulation Scheme of RMG Copper

  • Acid mine drainage water is naturally collected into the pond arranged at the bottom of the quarry;
  • Acid mine drainage water is pumped out from the bottom of the quarry by means of special pumps and pipelines into the acid mine drainage water dam arranged under the second waste rock disposal site;
  • Water, discharged from №2 waste rock disposal site,wich is also characterized with low pH is collected in the same dam;
  • Acid mine drainage water is drifted to the copper production plant from the dam, where it is processed and purified and copper cementised concentrate is obtained;
  • Later, the remaining acid water along with the waste formed as a result of copper ore processing, is pumped into the tailings dam by means of special pumps and pipeline;
  • Water drained from the tailings dam is collected in the pond arranged at the bottom of the dam;
  • Water, added from the river Mashavera is also collected here;
  • Water from the pond is pumped back into the tailings  by means of special pumps and pipeline;
  • Heavy particles are deposited in the tailings dam and the water is returned to the enterprise by means of special pumps and the pipeline for ensuring ore “flotation” process;
  • Thus, water of RMG Copper is circulating within closed cycle;

Description of RMG Gold water Circulation Scheme

  •  Heap leach platforms are inlaid with waterproof, high density polyethylene (HDPE);
  • Crushed ore heaps are located on the platforms, which are splashed with 0.06% sulfate cyanide;
  • Gold ore leached by means of the solution runs into the solution pond full of ore;
  • From the pond the solution is delivered to the activated charcoal filter, where gold is absorbed into the activated charcoal;
  • Waste water runs to the pond of concentrated cyanide solution in which cyanide is added and delivered back for splashing over the piles;
  • Here water moves in a closed cycle;

Prevention of Dust Production

Dust produced due to the quarry operation and gases emissed as a result of explosions, does not belong to the high environment contamination group. Nevertheless, besides the neutralization of quarry acid waters it is very important to take some active measures for fighting against dust, and one of the basic means of these is periodical watering of dust producing sources.
In order to reduce dust particles, company's special vehicles filled with water provide daily watering of motorways.
Main sources of dust production are quarry and main roads, waste rock disposal sites.
Dust emission is controlled by water splashing systems, which are installed on the ore crasher and delivery points.
Considering prevailing wind directions, nearby settlements are not subject to dust pollution.
Dust produced as a result of sample crashing and grinding in the lab is collected in the dust collector which filters dusty air and moves it to the container. Here from air is regularly emptied in piles which are immediately moistened, due to which dust is washed into the pile.