掘削機 - SANDVIK MINING AND CONSTRUCTION OY

Title:

掘削機

Document Type and Number:

Japanese Patent JP4551960

Kind Code:

B2

Abstract:

A method of breaking rock which includes the steps of drilling a hole in the rock using a drill rod; leaving the drill rod in the hole; using water flow to direct a propellant charge into the hole through a passage in the drill rod; and at a leading end of the drill rod, firing the propellant charge with, at least, the drill rod and water in the hole and passage providing a stemming function.

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Inventors:

Leppannen, Yarmo

Application Number:

JP2008502164A

Publication Date:

September 29, 2010

Filing Date:

March 13, 2006

Export Citation:

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Assignee:

SANDVIK MINING AND CONSTRUCTION OY

International Classes:

E21B1/00; B02C19/00; E21B7/00; E21C37/12; E21B; E21C; E21D

Domestic Patent References:

JP11510575A
JP2020792A

Foreign References:

US5803551

Attorney, Agent or Firm:

Takao Katori

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