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:
Jul. 03, 2018
Filed:
Nov. 19, 2014
China University of Mining and Technology, Xuzhou, CN;
Liqiang Ma, Xuzhou, CN;
Xiaomin Yu, Xuzhou, CN;
Yinzhong Zhang, Xuzhou, CN;
Jiaxue Wang, Xuzhou, CN;
Junjie Wang, Xuzhou, CN;
Maoping Zhao, Xuzhou, CN;
Jianbo Cao, Xuzhou, CN;
Peng Dl, Xuzhou, CN;
Zhiyuan Jin, Xuzhou, CN;
Fei Wang, Xuzhou, CN;
China University of Mining and Technology, Jiangsu, CN;
Abstract
A transportation main roadway and stope branch roadways are arranged by adopting a wangeviry coal mining method. A plurality of stope branch roadways are divided into multiple mining stages, based on which the stope branch roadways are skip-mined; and coal pillars are not reserved among the stope branch roadways. The transportation main roadway is a main transportation channel, and the stope branch roadways are coal mining roadways. All the stope branch roadways are sequentially stoped in a skip-mining manner according to the designed mining sequence and are sequentially and timely filled. The coal never stoped or the filled stope branch roadways is/are used as supports for controlling roofs at the two sides of the stope branch roadways, and the stope branch roadways are sequentially stoped according to a plurality of mining stages, and finally the coal pillar-free mining is realized.