A framework for ventilation planning, with particular focus on planning to the end of mine life, was developed for use at the Diavik Diamond Mine. Diavik has been an underground operation since 2012 and has a mine life of only 13 years. With only eight years remaining the mine will go through some fundamental milestones before closure. These milestones include the closing of two orebodies, leaving a single orebody for the final three years of mine life. A significant change to the ventilation system will be required to support the transition to the final configuration. The framework achieved this result through the reconciliation of the production plan with the ventilation plan by creating design acceptability criteria, and using the value-ease analysis method to narrow down relatively quickly the ideas generated to two options for detailed assessment and economic analysis. For Diavik, the framework was successfully utilized by the mine engineers to select a cost effective ventilation plan based on twinning an exhaust raise and re-equipping an old drift to the pit as an exhaust path with a new fan chamber. Introduction The Diavik Diamond Mine has been an underground-only operation since 2012 and has a remaining mine life of eight years. In the first year of underground-only operations the production rate ramped up from 60 kt of ore per month to over 160 kt per month, and in the subsequent years this rate was pushed continuously as the operation went through various improvement initiatives. These increases are shown in Table 1; they demonstrate how early plans created before commercial production became detached from reality after a few years. By the end of 2016 Diavik was 1.2 Mt (+14.8%) ahead of the 2012 Mine Plan. Table 1. Plan vs Actual Ore Production at the Diavik Underground Mine 2012-16 (Harry Winston, 2012) (Yip and Pollock, 2017) Diavik UG 2012 2013 2014 2015 2016 Actual Underground Production 0.94 Mt 1.96 Mt 2.28 Mt 1.98 Mt 2.21 Mt 2012 Budget Plan 0.96 Mt 1.8 Mt 1.8 Mt 1.8 Mt 1.8 Mt During its remaining operational life, the mine will pass through several fundamental milestones. For ventilation, these milestones are the opening of C-block for sublevel stoping in the A154N orebody in 2018, the depletion of the A154S orebody in 2019, and the depletion of the A418 orebody while opening D-block in A154N in 2021, identified in Figures 1 and 2. This plan will leave a single orebody in operation for the final three years of mine life (Yip and Pollock, 2017). A significant change to the ventilation system was required to support these transitions to the final configuration. A framework for ventilation planning has been developed and was utilized to select a ventilation plan that will meet the requirements of the life-of-mine plan. Ventilation and Primary Fan Description Diavik’s primary surface “FAR” Fans, identified in Figure 1, move approximately 710 m3/s (1.5 Mcfm) with five Alphair 10150-AMF-5500 Full Blade 2.6m (101.5”) diameter fans opera
编制现矿A418矿体A154S矿体A154N矿体FAR通风机标定通风模型
{"title":"Life-of-mine ventilation planning at Diavik","authors":"R. Clarke, E. D. Souza","doi":"10.15834/cimj.2018.12","DOIUrl":"https://doi.org/10.15834/cimj.2018.12","url":null,"abstract":"A framework for ventilation planning, with particular focus on planning to the end of mine life, was developed for use at the Diavik Diamond Mine. Diavik has been an underground operation since 2012 and has a mine life of only 13 years. With only eight years remaining the mine will go through some fundamental milestones before closure. These milestones include the closing of two orebodies, leaving a single orebody for the final three years of mine life. A significant change to the ventilation system will be required to support the transition to the final configuration. The framework achieved this result through the reconciliation of the production plan with the ventilation plan by creating design acceptability criteria, and using the value-ease analysis method to narrow down relatively quickly the ideas generated to two options for detailed assessment and economic analysis. For Diavik, the framework was successfully utilized by the mine engineers to select a cost effective ventilation plan based on twinning an exhaust raise and re-equipping an old drift to the pit as an exhaust path with a new fan chamber. Introduction The Diavik Diamond Mine has been an underground-only operation since 2012 and has a remaining mine life of eight years. In the first year of underground-only operations the production rate ramped up from 60 kt of ore per month to over 160 kt per month, and in the subsequent years this rate was pushed continuously as the operation went through various improvement initiatives. These increases are shown in Table 1; they demonstrate how early plans created before commercial production became detached from reality after a few years. By the end of 2016 Diavik was 1.2 Mt (+14.8%) ahead of the 2012 Mine Plan. Table 1. Plan vs Actual Ore Production at the Diavik Underground Mine 2012-16 (Harry Winston, 2012) (Yip and Pollock, 2017) Diavik UG 2012 2013 2014 2015 2016 Actual Underground Production 0.94 Mt 1.96 Mt 2.28 Mt 1.98 Mt 2.21 Mt 2012 Budget Plan 0.96 Mt 1.8 Mt 1.8 Mt 1.8 Mt 1.8 Mt During its remaining operational life, the mine will pass through several fundamental milestones. For ventilation, these milestones are the opening of C-block for sublevel stoping in the A154N orebody in 2018, the depletion of the A154S orebody in 2019, and the depletion of the A418 orebody while opening D-block in A154N in 2021, identified in Figures 1 and 2. This plan will leave a single orebody in operation for the final three years of mine life (Yip and Pollock, 2017). A significant change to the ventilation system was required to support these transitions to the final configuration. A framework for ventilation planning has been developed and was utilized to select a ventilation plan that will meet the requirements of the life-of-mine plan. Ventilation and Primary Fan Description Diavik’s primary surface “FAR” Fans, identified in Figure 1, move approximately 710 m3/s (1.5 Mcfm) with five Alphair 10150-AMF-5500 Full Blade 2.6m (101.5”) diameter fans opera","PeriodicalId":197002,"journal":{"name":"CIM Journal","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131327882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
L. Sinclair, J. Smith, D. Koch, J. Tester, J. F. Thompson
{"title":"Hydraulic conductivity and residence time in fractured rock: Florence Copper in situ leaching case study","authors":"L. Sinclair, J. Smith, D. Koch, J. Tester, J. F. Thompson","doi":"10.15834/CIMJ.2018.17","DOIUrl":"https://doi.org/10.15834/CIMJ.2018.17","url":null,"abstract":"","PeriodicalId":197002,"journal":{"name":"CIM Journal","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124534081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Fifty years of seeding","authors":"P. Evans, D. Purdie","doi":"10.15834/cimj.2018.15","DOIUrl":"https://doi.org/10.15834/cimj.2018.15","url":null,"abstract":"","PeriodicalId":197002,"journal":{"name":"CIM Journal","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122790078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Reliability and application of instrumented rockbolts in underground coal mines","authors":"T. Kostecki, A. Spearing","doi":"10.15834/cimj.2018.16","DOIUrl":"https://doi.org/10.15834/cimj.2018.16","url":null,"abstract":"","PeriodicalId":197002,"journal":{"name":"CIM Journal","volume":"120 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134046408","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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