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detained and later was adopted and has prevailed to this day. Later it was built Hrastnik shaft 1, which is a mine
opened up to Level VII. horizons to +87. The newest facility is shaft Hrastnik 2, which extends to K-12 to XI
horizon.
Mining method
The principle of the open pit coal layer conditioned location. Hrastnik mine was split vertically in the main
horizons, which were typically spaced up to 50 m. The space between horizons was divided into removal of
earth floors. Between the horizons of the cave area divided into removal of earth floors, which are related to the
horizon shafts or sloping lines. These are decline shafts or incline shafti. Upper horizons, and the main horizons
lines were used for the delivery of material, and Hike team for ventilation.
Lower horizon, or below horizon lines were used to transport coal to fresh air at floor level and removal of earth
to mine water drainage. At the lowest part of the horizon of the pumping station was built. The amount of
excavation floors, which were located between the horizons, was dependent on the mining method used
primarily on the amount of excavation.In cross-mining method, the amount of floors is up from 3 m to 5m.
When using long fase mining method of demolition, the floor height is varied from 3 m up to 15 m. In Hrastnik
mine due to the security level used in the floors long fase mining method with the demolition of most up to 10
m.
Lateral removal of earth chamber method
found expression Hrastnik break.
Hrastnik layer was compared with Ojstro at the turn pushed into the depths. The results of geological research
stratum, we have intensively carried out in 1980-1990 showed that the presence of coal up to the level -200 m.
Stratum Hrastnik coal in the west-east, the east entry to the cave Dol in the pit and the most easterly Lasko. A
layer of coal, which stretched all the way to the surface, decreasing with depth to the south. Width of the coal
ranged from 25 m to 50 m layer is stretched all the way from the surface to a depth of up to level. 235 and was
more or less unchanged in size and shape. From the level 235, the class size is significantly increased, apparently
was stratum.
In Hrastnik mine was used for coal mining over the excavation methods. Here we describe only two, which are
most characteristic of mine.The oldest mining method which was used from the start of excavation to the middle
60 years of the last century, the lateral chamber mining method. Transverse chamber mining method consists of
the arrow lines, which is manufactured using layers of coal in the normal east-west direction, depending on the
location coal layer, normal to the direction line are manufactured struts. Directional line is constructed on the
excavation floor, which are from top to bottom. Rippers floor of the main horizons associated with the route for
the expedition team, delivery of materials, ventilation, drainage and transportation of coal.
From the transverse line (normal) to layer a distance of 5 m were built struts to full floor strata or caprock. Cross
then under paragraphs expand into the chamber in the opposite direction making cross member. Space
(chamber), which is caused by coal excavation backfilling of backfill materials often this was floor strata (clay
soil). Backfill excavation area was first settled later manually with pneumatic backfilling. After suspending the
filling occurred mine fires.
Long wall mining method to increase height
Long wall mining method to increase the amount of the highly productive mining method, which is currently in
use. Method is used in combination with dust self-propelled hydraulic supports. Mining the vast amounts of 50
m to 80 m height, 10 m to 15 m. Daily production ranged from 2000 t / d to 3000 t / day.
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