Letter "S"

Secondary minerals

SECONDARY MINERALS are the minerals, which have been formed as the result of the chemical weathering, or of the replacement of the minerals, which have been isolated earlier.

Secondary explosive substances

SECONDARY EXPLOSIVE SUBSTANCES, see within the "Brisant explosive substances" article.

Secondary crushing

SECONDARY CRUSHING is the destruction of the oversized pieces within the mining mass during the construction, and during the opencast or underground development of the deposits.

Secondary settling

SECONDARY SETTLING within the underground mine is the spontaneous periodic settling of the rock within the roof of the longwall stope during the process of its movement.

Secondary extraction of petroleum

SECONDARY EXTRACTION OF PETROLEUM is the development of the energetically depleted petroleum layers, using the injection of the water or gas into these layers.

Sudden breakthrough

SUDDEN BREAKTHROUGH of the waters and quick clays is the increased inflow of the water or loose water-saturated rocks, which are having the quick clay properties, into the mine working; this phenomenon proceeds as the result of the spontaneous or forced destruction of the water-resistant rocks within the mine working.

Sudden outburst

SUDDEN OUTBURST is the spontaneous outburst of the gas, solid useful mineral (coal, salt), or country rock into the underground mine working from the stope or near-stope zone of the massif; the duration of the sudden outburst is up to several seconds.

Seismic vibrator

SEISMIC VIBRATOR, see within the "Non-explosive sources of the seismic oscillations" article.


SEAMARK is the floating anchored rod sign, with the fixed coordinates of the location.

Spillway device

SPILLWAY DEVICE serves for the diversion of the clarified water beyond the limits of the aggradation structures (dams, hydraulic waste dumps, storage facilities for the tailings, and so on), and for the passing of the freshet and rainstorm waters.

The side of the open pit mine

SIDE OF THE OPEN PIT MINE is the lateral bounding surface of the open pit mine, which is formed by the set of the slopes and horizontal places of the benches.

"Strong breathing" of reservoir

"STRONG BREATHING" of reservoir is the process of moving the air and vapour-aerial mixtures within the reservoirs for the storage of the easily evaporating liquids during their complete emptying and filling.

Swamp-traversing machine

SWAMP-TRAVERSING MACHINE, swamp-and-snow-traversing machine is the transport-technological machine for the transportation of people, loads, and equipment over the soils with the low bearing capability...


SWAMP is the place on the Earth's surface, which is continuously or periodically abundantly moistured, is covered prevalently by the moisture-loving plants (hydrophytes)...

Stray currents

STRAY CURRENTS are the currents of the leakage into the ground from the grounded electrical devices (rails of the electrified transport, working groundings of the electrical power transmission lines...

Stone block

STONE BLOCK is the the product of the natural stone in the shape of the right parallelepiped.

Safe distances during the blasting works

SAFE DISTANCES DURING THE BLASTING WORKS are the minimal distances from the charge of the explosive substances, at which the action of the explosion is safe for the people, mechanisms, buildings, and built structures...

Safety of the labour within the mining-extracting industry

SAFETY OF THE LABOUR WITHIN THE MINING-EXTRACTING INDUSTRY is the state of the labour conditions at the facilities of the mining-extracting industry, in case of which there is excluded the impact of the dangerous...

Safety signs

SAFETY SIGNS are the conventional designations in graphical form of the messages for the occupational safety.

Shaft-sinking bucket

SHAFT-SINKING BUCKET is designed for the hoisting of the rock, for the descent and ascent of the people, materials, equipment, for the inspection of the lining and so on during the construction and deepening of the vertical mine workings.