AUTHOR=Zhou Kai , Yu Fenghai , Tan Yunliang , Guo Weiyao , Zhao Tongbin 

TITLE=Study on failure behaviors and control technology of surrounding rock in a weakly cemented soft rock roadway: A case study

JOURNAL=Frontiers in Earth Science

VOLUME=Volume 11 - 2023

YEAR=2023

URL=https://www.frontiersin.org/journals/earth-science/articles/10.3389/feart.2023.1153753

DOI=10.3389/feart.2023.1153753

ISSN=2296-6463

ABSTRACT=During coal mining, the deformation and failure of weakly cemented soft rock roadway would bring out difficulties for roadway support. To solve this issue, this paper firstly investigates the in-situ deformation and failure behaviors of soft rock roadway in a mine in Western China. Then, the failure mechanism and corresponding support principles are discussed and given. Thirdly, two schemes of support optimization (bolt and cable reinforcement optimization, grouting + Single Prop + Top Beam combined reinforcement) are proposed and tested. Results show the support capacity can meet the requirements after the optimization of the bolt and cable reinforcement support; Due to the development of roof cracks and low grouting pressure, the grouting slurry can not completely fill the roof cracks, resulting in poor roof control effect. At this time, passive support “Single Prop + Top Beam” can effectively control the roof subsidence and achieve good application results.