Application of reverse circulation DTH hammer drill in anopen-pit mine exploration;

The aim of using the hollow DTH reverse circulation sampling drilling technology in the Molybdenum minerals in Henan is to solve the questions existence in drilling, holing and sampling.

Air driven hollow DTH hammer is applied,along with a set of dual wall drilling pipe and a specially designed reverse circulation bit,to conduct continuous coring reverse circulation drilling.

Application of hollow-through DTH to completed strata and improvement of reverse-circulation drilling bit;

Investigation of the Application of Hollow-through DTH Hammer Reverse Circulation Drilling Technique in Mineral Exploration

The hollow-through DTH hammer drilling techniques with whole hole reverse circulation is adopted,it is proved that this technique can resolve drilling.

As a kind of high and new technique, reverse circulation and continuous coring(sampling) drilling technique of hollow-through DTH hammer usually met complex formations(i.

The Hollow-through DTH hammer reverse circulation drilling technique is regarded as the advanced DTH hammer drilling technology, which integrates three advanced drilling methods of DTH hammer fracturing rock, fluent removal by reverse circulation and continually obtaining core and sample during drilling.