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IN BLASTING, STEMMING BLASTHOLES BY USING PLASTER(GYPSUM PLASTER OR MOULDING PLASTER) OR PLASTER AND LIMESTONE POWDER
IN BLASTING, STEMMING BLASTHOLES BY USING PLASTER(GYPSUM PLASTER OR MOULDING PLASTER) OR PLASTER AND LIMESTONE POWDER
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机译：石膏（石膏石膏或模压石膏）或石膏和石灰石粉在爆破，锻压爆破中的应用
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摘要
The method is stemming blastholes which is prepared easily and high blast energy is used breaking rocks with higher efficiency rate and it is a cheap and useful method. In this method, a solution in which plaster or plaster and limestone powder is mixed with water was improved for stemming blastholes. It is useful that some drilcuttings must be added over explosives so as to prevent moister. This powder is most readily available in blast sites. This solution is hardened in 15-20 minutes and it is strong like concrete. In this method, length of stemming is variable but length of stemming should be chosen as 30-50 cm.
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