AUTHOR=Sun Ruda , Zhao Zhipeng , Yang Wei , Li Hongping TITLE=Research and application of hydraulic fracturing axial roof cutting technology for gently inclined hard roof based on abrasive jet JOURNAL=Frontiers in Earth Science VOLUME=12 YEAR=2024 URL=https://www.frontiersin.org/journals/earth-science/articles/10.3389/feart.2024.1485210 DOI=10.3389/feart.2024.1485210 ISSN=2296-6463