eprintid: 1332 rev_number: 18 eprint_status: archive userid: 2 dir: disk0/00/00/13/32 datestamp: 2015-02-16 08:47:59 lastmod: 2017-02-08 12:21:38 status_changed: 2015-04-27 12:10:42 type: article metadata_visibility: show creators_name: Lesniak, Andrzej creators_name: Isakow, Zbigniew creators_id: lesniak@agh.edu.pl creators_id: corp_creators: Faculty of Geology, Geophysics and Environmental Protection, AGH University of Science and Technology, Poland corp_creators: EMAG Centre, Katowice, Poland title: Space–time clustering of seismic events and hazard assessment in the Zabrze-Bielszowice coal mine, Poland ispublished: pub subjects: RP2 subjects: SMU subjects: SS divisions: EPOS-ESI6 full_text_status: none keywords: Source location; Clustering; Seismic hazard; Rockbursts; Coal mining abstract: The results of the statistical analysis of seismic activity recorded in the “Zabrze-Bielszowice” coal mine in Poland are presented in this article. The monitoring was conducted by a small network consisting of four triaxial geophones deployed in vertical holes in the roof. For over 1000 seismic events recorded during the two month's experiment, the location of sources was realized. The seismic sources were mostly located ahead of the active face of the longwall. Since the first day of the monitoring, cluster analysis was sequentially performed for increasing number of sources. At the end of the experiment, 31 clusters were identified. They consisted of different numbers of events and were separated in space. About 40% of the events were not included in the clusters. For each large cluster, hazard analysis was separately performed. The hazard function evaluated for the largest cluster was compared with hypocenters of high energy tremors (E>1000 J) recorded by the geophones in that area. For some cases, recorded tremors occurred after an abrupt decrease of hazard function, but only one of them was located in the vicinity of the appropriate cluster. We concluded that for the analyzed cluster, a correlation between evaluated hazard function and time occurrences of the high energy tremors existed. Except for one case, there is no space correlation between analyzed clusters and high energy tremors. date: 2008-12 date_type: published publication: International Journal of Rock Mechanics and Mining Sciences volume: 46 number: 5 publisher: Elsevier Science pagerange: 918-928 id_number: doi:10.1016/j.ijrmms.2008.12.003 refereed: TRUE issn: 1365-1609 official_url: http://dx.doi.org/10.1016/j.ijrmms.2008.12.003 access_IS-EPOS: limited owner: Publisher citation: Lesniak, Andrzej and Isakow, Zbigniew (2008) Space–time clustering of seismic events and hazard assessment in the Zabrze-Bielszowice coal mine, Poland. International Journal of Rock Mechanics and Mining Sciences, 46 (5). pp. 918-928. DOI: https://doi.org/10.1016/j.ijrmms.2008.12.003