eprintid: 1355 rev_number: 15 eprint_status: archive userid: 2 dir: disk0/00/00/13/55 datestamp: 2015-02-26 15:16:13 lastmod: 2017-02-08 12:21:42 status_changed: 2015-04-27 12:10:45 type: article metadata_visibility: show creators_name: Shen, B. creators_name: King, A. creators_name: Guo, H. corp_creators: CSIRO Exploration & Mining, P.O. Box 883, Kenmore, Queensland 4069, Australia corp_creators: CSIRO Exploration & Mining, P.O. Box 883, Kenmore, Queensland 4069, Australia corp_creators: CSIRO Exploration & Mining, P.O. Box 883, Kenmore, Queensland 4069, Australia title: Displacement, stress and seismicity in roadway roofs during mining-induced failure ispublished: pub subjects: RA2 subjects: SMU subjects: SS divisions: EPOS-P full_text_status: none keywords: Displacement; Stress; Seismicity; Roof stability; Longwall mining; Real-time monitoring abstract: Roof stability in gateroads is a long-standing issue in many of the underground mines in Australia that use longwall extraction methods, due primarily to a significant increase of vertical stresses ahead of the longwall face. Although numerous studies have been done in the past, the process of roof rock deformation and breakage prior to and during a roof failure in an actual mining environment is still being debated. This paper describes a new integrated roof monitoring system and the results from applying this system in an Australian underground coal mine. The system integrates displacement, stress and seismic monitoring. It has been applied to two roadways in an Australian underground coal mine during two field experiments. The key roof behaviour identified by the integrated monitoring package during the two field monitoring experiments is reported and discussed in this paper.The experiments were conducted in the “tailgate” roadways that are adjacent to the caved zone, or “goaf”, of the previously mined panels. It was found in the experiments that, prior to roof falls, roof displacement accelerates whereas the horizontal stresses reduce. Seismic activity intensifies before major roof displacement or stress changes are evident, and subsides in the later stage of roof failure when large roof displacement is visible. The seismic resonance frequencies decrease during roof failure development. The field monitoring studies have also identified a number of quantitative and site-specific roof fall precursors potentially useful for roof fall prediction and prevention. date: 2007-10-24 date_type: published publication: International Journal of Rock Mechanics and Mining Sciences volume: 45 number: 5 publisher: Elsevier pagerange: 672-688 id_number: doi:10.1016/j.ijrmms.2007.08.011 refereed: TRUE issn: 1365-1609 official_url: http://dx.doi.org/10.1016/j.ijrmms.2007.08.011 access_IS-EPOS: limited owner: Publisher citation: Shen, B. and King, A. and Guo, H. (2007) Displacement, stress and seismicity in roadway roofs during mining-induced failure. International Journal of Rock Mechanics and Mining Sciences, 45 (5). pp. 672-688. DOI: https://doi.org/10.1016/j.ijrmms.2007.08.011