Abstract
A method of stemming a blast hole loaded with an explosive charge. The blast hole has side walls, an outwardly opening mouth and a central axis extending longitudinally of the blast hole. The method comprises inserting a conduit having a discharge end inwardly through the mouth of the blast hole and positioning the discharge end of the conduit within the blast hole generally adjacent the explosive charge. Particulate stemming material is forced under pressure through the conduit for exit from its discharge end into the blast hole toward the explosive charge thereby to pack stemming material in the blast hole adjacent the explosive charge. As stemming material is forced out the discharge end of the conduit, the discharge end of the conduit is moved generally axially outwardly relative to the blast hole toward the mouth of the blast hole to simultaneously fill and pack the blast hole with stemming material.
Recommended Citation
P. N. Worsey, "Method of Stemming a Blast Hole," U.S. Patents, Oct 1993.
Department(s)
Mining Engineering
Patent Application Number
US07/961,487
Patent Number
US5253586A
Document Type
Patent
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 1993 The Curators of the University of Missouri, All rights reserved.
Publication Date
19 Oct 1993
