The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 22, 2017
Filed:
Jul. 22, 2015
Applicant:
Xia Zhao, Xining, CN;
Inventor:
Xia Zhao, Xining, CN;
Assignee:
Other;
Primary Examiner:
Int. Cl.
CPC ...
E21C 41/32 (2006.01); E21C 41/26 (2006.01); E21C 41/16 (2006.01); E21C 41/28 (2006.01);
U.S. Cl.
CPC ...
E21C 41/32 (2013.01); E21C 41/16 (2013.01); E21C 41/26 (2013.01); E21C 41/28 (2013.01);
Abstract
The present invention provides a mining method. The method includes: dividing a mining region into a plurality of federated mining regions; performing an open-pit mining operation in each of the federated mining regions and forming a pit in each of the federated mining regions; performing an underground mining operation on a slope of the pit and forming a plurality of excavated tunnels; and backfilling a pit of a previous federated mining region with a spoil of a subsequent federated mining region.