期刊
INTERNATIONAL JOURNAL OF COAL GEOLOGY
卷 64, 期 1-2, 页码 66-78出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.coal.2005.03.017
关键词
rockburst; seismic; overcoring; stress; analysis; mine
This paper presents the results of seismic and geotechnical studies carried out after a fatal accident that occurred during mining of the Frieda5 coal seam at Merlebach mine of HBL (Houilleres du Bassin Lorrain, East France). On June 21, 2001, a violent rockburst (local magnitude of 3.6) affected the Frieda5 seam at depth of approximately 1250 m. The zone of the accident is located in the main gate 200 m ahead of the longwall face. Subsequently, an investigation was carried out to determine the causes of the accident and to understand the induced phenomenon. The program included an analysis of a comprehensive set of seismic data and the collection of in-situ stress measurements. The objectives were twofold: (1) to provide input data for the back analysis of the rockburst and (2) to identify other potential high-risk zones in the next panels to be mined. The joint analysis of the seismic, geological and geotechnical investigations suggests that the rockburst is largely due to a specific geological phenomenon, a sandstone channel in the floor of the coal seam characterized by high horizontal stresses. (c) 2005 Elsevier B.V All rights reserved.
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