Stemming
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United States of America Patent
Stats
-
Jul 29, 1980
Grant Date -
N/A
app pub date -
May 15, 1978
filing date -
May 7, 1977
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In mining and quarrying an explosive charge is placed in a shot hole, and the subsequent explosion is contained by stemming. The invention provides stemming made from stemming plugs, each consisting of a self-supporting body made principally of sand bound with the aid of sodium silicate. The plugs are wetted, preferably by immersion in water, and inserted into the shot hole where they are crushed or disintegrated to form the stemming.
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