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Braking an electric motor by reversing its connections, so it tends to turn in the opposite direction; the circuit is opened automatically when the motor stops, so the motor does not actually reverse.
The formation of a barrier (plug) of solid material in a process flow system, such as a pipe or reactor.
(mining engineering)
(petroleum engineering)
The act or process of stopping the flow of water, oil, or gas in strata penetrated by a borehole or well so that fluid from one stratum will not escape into another or to the surface; especially the sealing up of a well that is dry and is to be abandoned.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



the process of forcing special solutions into rocks. Plugging is used in mining and hydraulic construction to reinforce rock massifs, to waterproof and lay seepage barriers that prevent subsurface water from penetrating mining excavations (mine shafts, shaft bottoms, and drifts) and prevent seepage from penetrating the foundations of hydraulic structures, such as dams. In drilling wells, plugging is used to prevent outflow of water, petroleum, and natural gas from the wells. Plugging operations differ in the plugging solution used—cement, clay, bitumens, and calcium silicate (for rocks) and synthetic resins (for strengthening rock massifs). Combinations of substances are also used.

In mine construction, preliminary plugging is carried out prior to excavating. A specific plugging operation consists in injecting solutions under low pressure (up to 1 technical atmosphere) into the gap between the mine supports and the rock walls of shafts or other excavations to ensure the uniform transfer of rock pressure to the supports from all directions. In the construction of hydraulic structures, plugging is carried out through boreholes sunk into the foundation of the structure. Solutions can also be injected into friable, unstable rocks through pipes driven into the rocks.

An integrated method of plugging rocks by using clay mortars with small amounts of reagents (cross-linking agents), such as cement and sodium silicate (water glass), came into use in the USSR in the 1970’s. With this process it is possible to make engineering calculations of the plugging process from preliminary hy-drodynamic investigations of the rock massif.


Adamovich, A. N., and D. V. Koltunov. Tsementatsiia osnovanii gidrosooruzhenii, 2nd ed. Moscow-Leningrad, 1964.
Trupak, N. G. Spetsial’nye sposoby provedeniia gornykh vyrabotok, 2nd ed. Moscow, 1964.
Cambefort, A. In”ektsiia gruntov. Moscow, 1971. (Translated from French.)
Bulatov, A. I. Tekhnologiia tsementirovaniia neftianykh i gazovykh skvazhin. Moscow, 1973.


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.


Filling a hole, drilled in masonry, with a fiber, plastic, or wood plug into which a screw can be driven.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
This process is largely similar to screen printing, but the squeegee is replaced by a "trough" via in which the plugging paste is pressed into the vias.
After thermal curing of the plugging paste--for most thermal setting plugging pastes this is carried out at 150[degrees]C for 30-45 min.--smearing and residues of the plugging paste are removed from the PCB by means of brushing and/or polishing, and the PCB and the via fillings are leveled.
Moreover, it has to be ensured that the plugging paste is not partially removed from the vias.
In order to facilitate brushing, various adjustments of plugging paste are available.
From the plugging tests it is clear that contact with the sheet does not significantly reduce the ability of the material to deform further, which indicates that conductive heat losses into the plug are minimal.
* Lubrication and cleaning shower nozzles-for plugging and nozzle integrity.
* Uhle box covers: plugging, surface wear, chips, cracks, sharp edges.
* Vacuum / blower rolls--check for plugging in hole openings.