Back-analysis of the rockburst in Frieda 5 and design program for panel in seam 6 (HBL-France)

Vincent Renaud (1) , Lynda Driad (1) , Marwan Al Heib (1) , J.-F. Noirel (2)

1 INERIS - Institut National de l'Environnement Industriel et des Risques
2 Coal Mine

This paper develops the studies carried out after the fatal accident occurred during the mining of Frieda5-1250 panel at Merlebach mine section of HBL (East France). On the 21 June 2001, a violent rockburst (local magnitude of 3.6) has affected the panel 1250 of Frieda5 coal seam. An investigation program was carried out to determine the causes of this accident and to understand the induced phenomenon. The program include: seismic investigations, geological and geotechnical analysis and numerical modeling. The objective is to determine eventually the presence of particular geological structures and there role in the initiation of the accident. After the accident, the HBL intended to mine the Seam 6. In order to monitor the behavior of the ground during the mining of the Seam 6, a geotechnical program comprising a complete study of the natural conditions and a seismic analysis was carried out. The environment of the panel is marked by the presence certain number of faults. Stress disturbed by the exploitation of the old panels and the presence of faults are likely to modify the equilibrium of strata before the exploitation and can induced seismicity. To study their influence, the INERIS carried out a numerical modeling in the scale of mine area (SUIT3D and FAULT3D), for the determination of the stress zone induced by old and new panels.

Domaines: Sciences de la Terre; Sciences de l'environnement

Vincent Renaud, Lynda Driad, Marwan Al Heib, J.-F. Noirel. Back-analysis of the rockburst in Frieda 5 and design program for panel in seam 6 (HBL-France). ROCKBURSTS International Symposium 2002, Nov 2002, Ustron, Poland. pp.313-326. ⟨ineris-00972385⟩