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:
Sep. 16, 2025
Filed:
Jun. 10, 2025
China University of Mining and Technology, Beijing, Beijing, CN;
Yifan Zeng, Beijing, CN;
Hao Li, Beijing, CN;
Qiang Wu, Beijing, CN;
Weihong Yang, Beijing, CN;
Donghui Yang, Beijing, CN;
Aoshuang Mei, Beijing, CN;
Anqi Zhou, Beijing, CN;
CHINA UNIVERSITY OF MINING AND TECHNOLOGY, Beijing, CN;
Abstract
Provided are a method for grout injection repair and water retention in a goaf, including: determining extraction information on the goaf and a coal seam, forming a barrier wall through performing a first grouting operation at a side of the goaf near the coal seam based on the extraction information, performing a second grouting operation to complete a grout injection repair from outside to inside in the goaf based on the extraction information. The first grouting pressure of the first grouting operation is less than the second grouting pressure of the second grouting operation.