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:
Nov. 12, 2019
Filed:
Dec. 01, 2017
China University of Mining and Technology, Jiangsu, CN;
Baiquan Lin, Jiangsu, CN;
Tong Liu, Jiangsu, CN;
Ting Liu, Jiangsu, CN;
Wei Yang, Jiangsu, CN;
He Li, Jiangsu, CN;
Zhanbo Huang, Jiangsu, CN;
Rui Wang, Jiangsu, CN;
Yihan Wang, Jiangsu, CN;
China University of Mining and Technology, Jiangsu, CN;
Abstract
A method for stepwise construction of a preferential gas migration pathway at a stope in a coal seam. First, a gas migration pathway is preliminarily formed at a stope depending on a mining effect of mining in a first mined seam. construction and stabilization method of gob-side entry retaining in deep strata, and a method of manual-guided pre-fracturing boreholes are then used to perform active construction respectively in external space and the outside of coal-rock mass to form preferential gas migration pathways. Eventually, under the effect of mining-induced stress, a system of preferential gas migration pathways connected to each other at the stope is further formed.