US Patent Issued to CHINA UNIVERSITY OF MINING AND TECHNOLOGY on Sept. 16 for "Methods for grout injection repair and water retention in goaf" (Chinese Inventors)

ALEXANDRIA, Va., Sept. 17 -- United States Patent no. 12,416,237, issued on Sept. 16, was assigned to CHINA UNIVERSITY OF MINING AND TECHNOLOGY (Beijing).

"Methods for grout injection repair and water retention in goaf" was invented by Yifan Zeng (Beijing), Hao Li (Beijing), Qiang Wu (Beijing), Weihong Yang (Beijing), Donghui Yang (Beijing), Aoshuang Mei (Beijing) and Anqi Zhou (Beijing).

According to the abstract* released by the U.S. Patent & Trademark Office: "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 ex...