Design of ore and discard chimneys (cheminées à minerai et à stérile) Abstract Mine chimneys are steep, underground openings into which ore is poured and then hoisted to the surface from the base of the central shafts. These chimneys occasionally become blocked, mainly due to the deterioration of their walls. The miners must then unblock them so that hauling work can continue. Given the nature of the activities carried out, this activity presents serious risks to miner safety. As a result, between 1987 and 1999, a survey was done of 60 accidents, nine of which were fatal, caused by work on these structures. Better chimney design would reduce the frequency of blockages and the deterioration of walls, which could help prevent accidents. The purpose of the research project is to develop a chimney design aimed at avoiding blockages and preventing or reducing wall deterioration, as well as to propose safer work methods. It will also provide the basis for a guide for mining engineers. Produced Under this Project Scientific Reports Design of ore and waste chutes Research Report: R-380List of work methods related to ore and waste chute clearing and rehabilitation operations (Revised version) Report Appendix: RA-380 Guide and Tools Ore and waste chute design guide Technical guide: RG1-380Ore and waste chute clearing guide (Revised Version) Technical guide: RG2-380 Simplified Articles Cheminées à minerai - Mieux les concevoir, les débloquer en toute sûreté Volume 18, n0 2 Scientific Publications Influence of excavation inclination and particle shape on ore pass hang-upsHadjigeorgiou J., Turcotte P., Lessard J.-F.Source : in Canadian Institute of Mining, Metallurgy and Petroleum Annual General Meeting (105th : 4-7 May, 2003 : Montréal, Canada), 2003Rock pass operational problems in Quebec underground minesLessard J.-F., Hadjigeorgiou J., Turcotte P.Source : Canadian Institute of Mining, Metallurgy and Petroleum Annual General Meeting (104th : 28 April-1 May, 2002 : Vancouver, Canada), 2002The case for liners in ore pass systemsHadjigeorgiou J., Lessard J.-F.Source : in International Seminar on Surface Support Liners 2003: Thin Spray-On Liners, Shotcrete and Mesh, (25-26 August, 2003 : Québec, Canada), 2003, Section 4, p. 14Design tools to prevent ore pass hang-upsLessard J.-F., Hadjigeorgiou J.Source : in Congress of the International Society for Rock Mechanics (10th : September 8-10, 2003 : Sandton, South Africa), 2003, vol. 2, p. 757-762Ore pass practice in canadian minesHadjigeorgiou J., Lessard J. F., Mercier-Langevin F.Source : South African Institute of Mining and Metallurgy Journal, vol. 105, no 11, 2005, p. 809-817Ore pass database: Quebec underground metal minesLessard J. F., Hadjigeorgiou J.Source : CIM Magazine, vol. 1, no 1, March-April 2006Numerical investigations of ore pass hang-up phenomenaHadjigeorgiou J., Lessard J. F.Source : International Journal of Rock Mechanics and Mining Sciences, vol. 44, no 6, 2007, p. 820-834 Additional Information Type: Project Number: 0099-0890 Status: Completed Year of completion: 2004 Research Field: Mechanical and Physical Risk Prevention Team: John Hadjigeorgiou (Université Laval)Jean-François Lessard (Université Laval)