Mining method and mining machine for cutting away hard mineral materials

US4181363A · kind A · utility

Assignee

• Gutehoffnungshutte Sterkrade A.G. · DE

Inventors

• Heinrich Goris · Hamminkeln, DE
• Roland Gunther · Wesel, DE
• Kurt Ogorek · Oberhausen, DE
• Karl H. Schwarting · Voerde, DE
• Wilfried Witulski · Unna, DE

Key dates

• Filing date: Mar 28, 1978
• Grant date: Jan 1, 1980
• Expiry date: Mar 28, 1998

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21C27/46
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

A mining method for cutting away hard mineral materials of a mining face, comprises, undercutting the mineral material by directing a liquid jet into the running face to form a mineral slab which overlies the undercutting and breaking the bond of the slab from the main face by striking it with a wedge-shaped impact tool in the undercut area and conveying away the broken-off material. The apparatus for carrying out the mining operation comprises a machine which is adapted to run along the mining face alongside a conveyor for conveying away the material. The machine includes an operating mechanism for moving a breaking head at each end inwardly into the mine face and along the mine face. The breaking head carries a percussion wedge member which may be driven into the mine face. In addition, it carries a nozzle assembly for directing a liquid jet at high pressure against the mining face so as to undercut an area thereof and to leave a slab overlying the undercut area which may be broken away by the wedge-shape percussion member.