Reference number : GC-2017-Q3-00307, amendment number : , agreement type : G, recipient legal name : Apel, Derek (University of Alberta), recipient country : CA, recipient province : nan, recipient city : Alberta, recipient postal code : nan, program name english : Collaborative Research and Development Grants - Project, program name french : Subventions de recherche et développement coopérative - projet, program purpose english : Due to a combination of mining methods used to extract the mineral deposits and the tectonic stress regime unique to the kimberlite pipes the Canadian underground diamond mines are currently experiencing significant ground movements and in some instances some mines are reporting severe ground failures at their underground openings. These ground failures are not only hazards to the safety of mining employees but also reduce the extraction efficiency of the mineral and revenues at these mines. The high cost of underground operations and the low economy make the situation even worse._x000D_
The goal of this proposal is to develop an integrated approach in increasing extraction efficiently. Firstly, a_x000D_
systematic characterization of the host rock and cemented rock fill (CRF) will be conducted through a series of comprehensive laboratory and field in-situ investigations. After that, a stress-strain-volume change constitutive law will be derived from these characterizations for both rock mass and CRF in numeric modeling. Moreover, an assessment of the stability of underground workings will be implemented after pillar recoveries. At the end, ground performances will be monitored and data will go back to the prediction model as feedback and adjustments. As a result, a practical design guideline will be prepared to assist the pillar recovery for Diavik and other underground Canadian diamond mines., program purpose french : Due to a combination of mining methods used to extract the mineral deposits and the tectonic stress regime unique to the kimberlite pipes the Canadian underground diamond mines are currently experiencing significant ground movements and in some instances some mines are reporting severe ground failures at their underground openings. These ground failures are not only hazards to the safety of mining employees but also reduce the extraction efficiency of the mineral and revenues at these mines. The high cost of underground operations and the low economy make the situation even worse._x000D_
The goal of this proposal is to develop an integrated approach in increasing extraction efficiently. Firstly, a_x000D_
systematic characterization of the host rock and cemented rock fill (CRF) will be conducted through a series of comprehensive laboratory and field in-situ investigations. After that, a stress-strain-volume change constitutive law will be derived from these characterizations for both rock mass and CRF in numeric modeling. Moreover, an assessment of the stability of underground workings will be implemented after pillar recoveries. At the end, ground performances will be monitored and data will go back to the prediction model as feedback and adjustments. As a result, a practical design guideline will be prepared to assist the pillar recovery for Diavik and other underground Canadian diamond mines., agreement title english : Integrated approach to optimize mineral extraction efficiency in Canada's underground diamond mines, agreement title french : Integrated approach to optimize mineral extraction efficiency in Canada's underground diamond mines, agreement number : CRDPJ, agreement value : 124000.0, agreement start date : 2017-10-18, agreement end date : nan, description english : nan, description french : nan, expected results english : nan, expected results french : nan, additional information english : Grant or Award spanning more than one fiscal year (2017-2018 to 2021-2022)., additional information french : Subvention ou bourse octroyée s'appliquant à plus d'un exercice financier (2017-2018 à 2021-2022)., owner organization : nserc-crsng, owner organization title : Natural Sciences and Engineering Research Council of Canada | Conseil de recherches en sciences naturelles et en génie du Canada