Abakan iron ore deposit

Abakan iron ore deposit is located in the ReGeological cross section of the Abakan ore depositpublic of Khakassia, Krasnoyarsk Krai, Russian Federation, in the north eastern spurs of the Western Sayan mountains.

The deposit has been discovered in 1856, and the ore has been mined from time to time since then. Abakan Ore Mining company (Abakanskoye rudoupravlenie) has been created in 1947-59 for the mining and processing of this ore. Since 1957 Abakan ore deposit has been mined using the open pit technique, and starting from 1962 by the underground mining means (the mine with the depth of 400 metres has been put into action).

The deposit has the contact-metasomatic origin, and is represented by the steeply dipping, easy to beneficiate, magnetite ore bodies and skarns, among the tuffaceous sedimentary rocks of the Middle Cambrian, which have been torn through by the syenite-diorite intrusions. There are 5 known ore bodies, which, together with their host rocks, are dissected by the numerous ruptures with the amplitude of movements of more than 50 metres. The permanent companions of the magnetite are actinolite, chlorite, calcite, siderite, and cobalt containing pyrite.

The deposit has been explored down to the depth of 1200-1300 metres below the surface, with a rupture down to the depth of 700-900 metres. Ore reserves are about 153.0 million metric tonnes (1981), containing 42.4% of the Fe element on average, with the admixture of Co, Zn, S. The deposit is mined using the 5 vertical shafts with the horizontal level crosscuts. The method of mining is the forced collapse of the ore at the horizontal mining levels, with the breaking of the ore on the vertical compensatory space in the sandwiched environment. The height of the level is 60-80 metres. Ore extraction ratio is 85%. The annual ore production is 2.4 million metric tonnes (1981). The productivity of the underground worker is 21.1 metric tonnes per shift.The system of the forced level collapse, with the breaking of the ore on the compensatory space

The ore is beneficiated by the two-stage dry magnetic separation. Industrial product (containing 47.5% of the Fe element) is sent for the further beneficiation to the beneficiation and sintering plant in the Abaza city. Industrial centres are the Abaza city, Abakan city (170 km) and Novokuznetsk city (360 km), which are connected with the Abaza city by the railway. The main consumer of the ore is the Kuznetsk Metallurgical Combine industrial complex.

In the diagram:

1 - the excavation for the railway carriages;
2 - the excavation for the vibration machines;
3 - the hoppers for the release of the ore;
4 - the bore holes for the slash production level;
5 - the bore holes of the upper level;
6 - the bore holes for the creation of the compensatory space;
7 - the bundles of the blast bore holes for the collapse of the pillars;
8 - the excavations for the ventilation;
9 - the ore, which has been broken off;
10 - the collapsed laying rocks;
11 - the bore holes for the breaking of the ore in the chamber;
12 - the slit for the cut off;
13 - the bore holes for the collapse of the ceiling;