Patent · US Active

Method for pillar recovery in chamber-and-pillar working and tubbing unit for pillar recovery

US7540693B2 · kind B2 · utility

6Cited by

7References

12Claims

0Family size

Assignee

DBT GMBH · DE

Inventors

Peter Gross · Saarlouis, DE
Reiner Schuster · Riegelsberg, DE

Key dates

Filing date	Aug 24, 2006
Grant date	Jun 2, 2009
Priority date	—
Expiry date	Aug 24, 2026

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21C41/16
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

Methods for pillar recovery in chamber-and-pillar working materials in underground stratified beds are disclosed. Additionally, tubbing units for pillar recovery in chamber-and-pillar working of materials in underground stratified beds are disclosed. An extraction device is aligned obliquely to pillar galleries located between the pillars and the roof is supported in front of the retreat face of the extraction device with a plurality of tubbing units, each tubbing unit being adjustable in height and width and movable through operation of a vehicle. The tubbing units may be moved through other tubbing units that are set, and reset in another position.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.