US Patent Issued to CCTEG COAL MINING RESEARCH INSTITUTE on April 15 for "Three-level prevention and control method for rock burst roadway" (Chinese Inventors)

ALEXANDRIA, Va., June 5 -- United States Patent no. 12,276,196, issued on April 15, was assigned to CCTEG COAL MINING RESEARCH INSTITUTE (Beijing).

"Three-level prevention and control method for rock burst roadway" was invented by Yongzheng Wu (Beijing), Yukai Fu (Beijing), Xiaowei Chu (Beijing), Jinyu Chen (Beijing), Jie He (Beijing), Xinhua Liu (Beijing) and Xianzhi Meng (Beijing).

According to the abstract* released by the U.S. Patent & Trademark Office: "A three-level prevention and control method for a rock burst roadway, the method comprising: pre-weakening a thick and hard rock layer above a roadway before the roadway is excavated; carrying out prestress support, pressure relief and reinforcement when the roadway is excavated; and ...