IMPROVEMENTS IN OR RELATING TO CEMENTITIOUS COMPOSITIONS

摘要

The invention provides a method of preparing a blast hole (20) which method comprises the steps of drilling a blast hole (20); placing explosives (40) in the blast hole; filling the blast hole (20) with a stemming material (50) comprising a cement composition and water wherein the weight ratio of water to solids content of the stemming material is at least about 1:1.