Stemming definition of Stemming in the Free Online Encyclopedia.

stemming

A suitable inert incombustible material or device used to confine or separate explosives in a drill hole, or to cover explosives in mudcapping.

stemming - stemmer

Stemming

in blasting operations:

(1) The process of filling the empty part of a charge case, such as a blasthole or well, with an inert stemming material (sand, gravel, or clay) to retain the products of the detonation of an explosive charge in an enclosed space. Blastholes and wells are stemmed mechanically by pneumatic rammers and stemming machines. Stemming is performed after the charging operation is completed.

(2) The material used in charge cases to insulate an explosive charge. Friable materials that are inert to the action of an explosion and are sufficiently hard and have a high coefficient of internal friction are usually used for stemming. In blast-holes, the best stemming materials are crushed stone chips (with water filling the spaces between the grains), coarse sand, water-filled plastic ampuls, and fast-hardening concretes. In shafts in which there is a gas or dust hazard, various types of pulp and paste stemming materials are also used. Stemming made of finely crushed chips (to 20 mm) and siftings from crushing and sorting plants is used in wells. Water stemming of well charges is less effective, since its ejection resistance decreases sharply with an increase in diameter. Stemming made with pieces of rock no larger than 300 mm is advisable for case charges. Stemming increases the resistance to the escape of gaseous detonation products from the charge case, as well as the duration of application of the explosion energy to the performance of efficient crushing work or the removal of rock to a particular distance.

The length of the stemming may be only 8–10 times the diameter of the blasthole or well when the most effective materials and the most efficient explosive charge arrangements are used. In shafts with gas and dust hazards, the length of the stemming is governed by the Safety Regulations.

V. M. KOMIR

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No references found	The bases of the mountains forming the gorge in which the little village lay, were richly green; and high above this gentler vegetation, grew forests of dark fir, cleaving the wintry snow-drift, wedge-like, and stemming the avalanche. David Copperfield by Dickens, Charles View in context Sir Nigel's shield was broken, his crest shorn, his armor cut and smashed, and the vizor torn from his helmet; yet he sprang hither and thither with light foot and ready hand, engaging two Bretons and a Spaniard at the same instant--thrusting, stooping, dashing in, springing out--while Alleyne still fought by his side, stemming with a handful of men the fierce tide which surged up against them. The White Company by Doyle, Sir Arthur Conan View in context The sea of people is coming this way, and we shall find a difficulty in stemming the tide. Four Beasts in One by Poe, Edgar Allan View in context	Stellenbosch Steller's Sea Cow Steller's Sea Lion Steller, Georg Wilhelm Stellera Stelleroidea Stellinga, Uprising of the Stellite Stelmakh, Mikhail Stelmakh, Mikhail Afanasevich Stelvio Pass Stelze, Charles Stem stem bag stem blight stem break stem canker Stem Cell Stem cells stem correction stem rust stem-cell leukemia stem-winding Stemalit stemmer Stemming stemming rod Stemonitaceae Stemonitales Stenberg, Vladimir Avgustovich and Georgh Avgustovich Stenbock, Count Magnus stench stench trap Stencil stencil printing Stenciling Stendal Stende Stendhal Stenella Stenetrioidea Stengel, Casey Stenmark, Ingemar Stenness, Loch of Steno's Law Steno, Nicolaus Stenobathic Animal Stenobiont Stenocephalidae stenocephaly stenode circuit	stemhead STEMI stemless stemless stemless stemless stemless carline thistle stemless carline thistle stemless daisy stemless golden weed stemless hymenoxys stemless loco Stemlet stemma Stemmacantha carthamoides stemmas stemmata stemmatic stemmatics stemmatology stemmatology stemmed stemmed stemmed stemmed stemmed stemmer stemmer Stemmers Run Middle School Stemmery Stemming stemming algorithm stemming algorithm Stemming Algorithms stemming rod Stemmons Corridor Business Association Stemmy STEMNET Stemodia kingii Stemonitaceae Stemonitales Stempel School of Public Health Stemple stemples Stemplot Stemplot stems stems stems stems stems stems stemson STEMTEC STEMTP STEMULE stemware Sten Sten Sten gun Sten guns

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The bases of the mountains forming the gorge in which the little village lay, were richly green; and high above this gentler vegetation, grew forests of dark fir, cleaving the wintry snow-drift, wedge-like, and stemming the avalanche.

David Copperfield by Dickens, Charles View in context

Sir Nigel's shield was broken, his crest shorn, his armor cut and smashed, and the vizor torn from his helmet; yet he sprang hither and thither with light foot and ready hand, engaging two Bretons and a Spaniard at the same instant--thrusting, stooping, dashing in, springing out--while Alleyne still fought by his side, stemming with a handful of men the fierce tide which surged up against them.

The White Company by Doyle, Sir Arthur Conan View in context

The sea of people is coming this way, and we shall find a difficulty in stemming the tide.

Four Beasts in One by Poe, Edgar Allan View in context