Patents by Inventor Guangqing Liu

Guangqing Liu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20250059889
    Abstract: A method for screening a key stratum for overburden separation grouting in a coal mine includes: selecting overall analysis objects based on coal mine planning; conducting a primary screening of the analysis objects based on a scope of a subsidence zone; conducting a secondary screening of the analysis objects based on whether there is an old goaf; determining key stratums for screened-in analysis objects, prioritizing the key stratums based on a number of separation spaces and a range of a separation height, setting a safe height based on a diversion fissure zone, and prioritizing numbers of groutable layers based on a potential separation space and a water resistance of a rock stratum; prioritizing the groutable layers based on a fault impact; and comprehensively analyzing grouting priority levels of the key stratums based on results of the three prioritizations, and grouting separation layers of the key stratums in order of priority.
    Type: Application
    Filed: April 12, 2024
    Publication date: February 20, 2025
    Applicants: PING AN COAL MINING ENGINEERING TECHNOLOGY RESEARCH INSTITUTE CO., LTD, HUAINAN MINING (GROUP) CO., LTD, ANHUI COALFIELD GEOLOGICAL BUREAU EXPLORATION AND RESEARCH INSTITUTE
    Inventors: Hongjie SUN, Bing LI, Shikai AN, Guangqing HU, Haiyan CHENG, Yingui GAO, Lin HU, Pengfei TAO, Hao LI, Yaojun SHI, Ruiyu LIU
  • Patent number: D954127
    Type: Grant
    Filed: December 17, 2020
    Date of Patent: June 7, 2022
    Assignee: Shenzhen CTV INT Cloud Technology Co., Ltd.
    Inventor: Guangqing Liu
  • Patent number: D960954
    Type: Grant
    Filed: April 16, 2020
    Date of Patent: August 16, 2022
    Inventor: Guangqing Liu
  • Patent number: D960955
    Type: Grant
    Filed: December 15, 2020
    Date of Patent: August 16, 2022
    Assignee: Shenzhen CTV INT Cloud Technology Co., Ltd.
    Inventor: Guangqing Liu
  • Patent number: D995607
    Type: Grant
    Filed: September 10, 2021
    Date of Patent: August 15, 2023
    Assignee: Shenzhen CTV Int Cloud Technology Co., Ltd.
    Inventor: Guangqing Liu
  • Patent number: D1008337
    Type: Grant
    Filed: June 15, 2022
    Date of Patent: December 19, 2023
    Assignee: SHENZHEN CTV INT CLOUD TECHNOLOGY CO., LTD.
    Inventor: Guangqing Liu