{"id":30237,"date":"2026-05-07T16:44:59","date_gmt":"2026-05-07T16:44:59","guid":{"rendered":"https:\/\/ccemining.com\/?page_id=30237"},"modified":"2026-05-07T17:45:26","modified_gmt":"2026-05-07T17:45:26","slug":"article-2","status":"publish","type":"page","link":"https:\/\/ccemining.com\/en\/article-2\/","title":{"rendered":"Article 2"},"content":{"rendered":"\t\t
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Comment optimiser la teneur de coupure pour maximiser la VAN de votre projet minier ?<\/h2>\t\t\t\t<\/div>\n\t\t\r\n\t\t\t\t
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La teneur de coupure<\/strong> (cut-off grade) est l’un des param\u00e8tres les plus influents dans l’\u00e9conomie d’un projet minier. Elle d\u00e9termine ce qui est consid\u00e9r\u00e9 comme minerai exploitable et ce qui est trait\u00e9 comme st\u00e9rile \u2014 et donc, directement, la taille des r\u00e9serves, la dur\u00e9e de vie de la mine et la valeur actuelle nette (VAN) du projet. Pourtant, elle est souvent fix\u00e9e de mani\u00e8re simpliste, sans optimisation rigoureuse.<\/p>

Qu’est-ce que la teneur de coupure ?<\/h4>

La teneur de coupure est la concentration minimale d’un m\u00e9tal ou min\u00e9ral en dessous de laquelle l’extraction n’est pas \u00e9conomiquement justifi\u00e9e dans les conditions actuelles ou pr\u00e9vues du march\u00e9. Elle s’exprime g\u00e9n\u00e9ralement en g\/t (or, argent), en % (cuivre, zinc) ou en unit\u00e9s sp\u00e9cifiques selon le m\u00e9tal consid\u00e9r\u00e9.<\/p>

Une teneur de coupure trop \u00e9lev\u00e9e<\/strong> r\u00e9duit le tonnage exploitable et raccourcit la dur\u00e9e de vie de la mine, mais augmente la teneur moyenne et les revenus unitaires. Une teneur trop basse<\/strong> gonfle les r\u00e9serves mais dilue les teneurs, augmente les co\u00fbts de traitement et peut r\u00e9duire la VAN globale.<\/p>

La m\u00e9thode de Lane : optimiser dynamiquement la teneur de coupure<\/h4>

La th\u00e9orie de Kenneth Lane<\/strong> (1988) reste la r\u00e9f\u00e9rence pour l’optimisation de la teneur de coupure. Elle consid\u00e8re trois contraintes limitantes dans une mine :<\/p>

  • La capacit\u00e9 mini\u00e8re<\/strong> (tonnes extraites par p\u00e9riode)<\/li>
  • La capacit\u00e9 de traitement<\/strong> (tonnes trait\u00e9es par p\u00e9riode)<\/li>
  • La capacit\u00e9 de vente\/raffinage<\/strong> (m\u00e9tal vendu par p\u00e9riode)<\/li><\/ul>

    Selon la contrainte active \u00e0 chaque p\u00e9riode, la teneur de coupure optimale sera diff\u00e9rente. L’objectif est de maximiser la VAN<\/strong> sur toute la dur\u00e9e de vie de la mine, et non simplement le profit \u00e0 court terme.<\/p>

    Les facteurs qui influencent la teneur de coupure<\/h4>

    Prix des m\u00e9taux :<\/strong> une hausse du prix de l’or, par exemple, peut justifier l’abaissement de la teneur de coupure pour inclure davantage de minerai marginal dans les r\u00e9serves.<\/p>

    Co\u00fbts d’exploitation (OPEX) :<\/strong> toute r\u00e9duction des co\u00fbts de minage, de traitement ou de G&A permet d’abaisser la teneur de coupure de mani\u00e8re rentable.<\/p>

    Taux d’actualisation :<\/strong> un taux \u00e9lev\u00e9 favorise une teneur de coupure plus haute en d\u00e9but de projet (extraction du minerai riche en priorit\u00e9) pour maximiser les flux de tr\u00e9sorerie pr\u00e9coces.<\/p>

    R\u00e9cup\u00e9ration m\u00e9tallurgique :<\/strong> une meilleure r\u00e9cup\u00e9ration \u00e0 l’usine \u00e9quivaut \u00e0 une r\u00e9duction effective de la teneur de coupure \u00e9conomique.<\/p>

    Contraintes g\u00e9ologiques et g\u00e9otechniques :<\/strong> certaines zones ne peuvent \u00eatre exploit\u00e9es qu’\u00e0 des co\u00fbts sp\u00e9cifiques, ce qui influe sur la teneur de coupure locale.<\/p>

    Strat\u00e9gies d’optimisation pratiques<\/h4>

    Optimisation par blocs :<\/strong> utiliser des logiciels comme Whittle, Deswik ou GEOVIA pour optimiser les fosses et les s\u00e9quences en int\u00e9grant des teneurs de coupure variables par phase et par p\u00e9riode.<\/p>

    Analyse de sensibilit\u00e9 :<\/strong> tester l’impact de variations de \u00b110-20% sur les prix, co\u00fbts et r\u00e9cup\u00e9ration pour identifier la robustesse de la teneur de coupure retenue.<\/p>

    R\u00e9vision p\u00e9riodique :<\/strong> la teneur de coupure n’est pas fig\u00e9e \u2014 elle doit \u00eatre r\u00e9vis\u00e9e \u00e0 chaque mise \u00e0 jour des param\u00e8tres \u00e9conomiques ou lors des \u00e9tudes de faisabilit\u00e9.<\/p>

    Int\u00e9gration au mod\u00e8le financier :<\/strong> la teneur de coupure doit \u00eatre directement li\u00e9e au mod\u00e8le DCF pour mesurer son impact r\u00e9el sur la VAN et le TRI.<\/p>

    Impact chiffr\u00e9 : un exemple simplifi\u00e9<\/h4>

    Pour une mine d’or avec 10 Mt de ressources \u00e0 1,5 g\/t en moyenne :<\/p>

    • Teneur de coupure \u00e0 0,8 g\/t<\/strong> \u2192 8 Mt de r\u00e9serves, teneur moyenne 1,8 g\/t, VAN = 120 M$<\/li>
    • Teneur de coupure \u00e0 0,5 g\/t<\/strong> \u2192 9,5 Mt de r\u00e9serves, teneur moyenne 1,55 g\/t, VAN = 105 M$<\/li>
    • Teneur de coupure \u00e0 1,2 g\/t<\/strong> \u2192 5 Mt de r\u00e9serves, teneur moyenne 2,1 g\/t, VAN = 95 M$<\/li><\/ul>

      Dans cet exemple, 0,8 g\/t maximise la VAN<\/strong> \u2014 ni trop haut, ni trop bas.<\/p>

      Conclusion<\/h4>

      L’optimisation de la teneur de coupure est un exercice it\u00e9ratif, multidisciplinaire et strat\u00e9gique. Elle n\u00e9cessite une collaboration \u00e9troite entre g\u00e9ologues, ing\u00e9nieurs miniers, m\u00e9tallurgistes et analystes financiers. Chez CCE Mining<\/strong>, nous int\u00e9grons syst\u00e9matiquement cette optimisation dans nos \u00e9tudes de planification et d’estimation des r\u00e9serves, pour garantir que chaque projet atteigne son plein potentiel \u00e9conomique.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\r\n\t\t\t\t<\/div>\n\t\t\r\n\t\t

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      Comment optimiser la teneur de coupure pour maximiser la VAN de votre projet minier ? La teneur de coupure (cut-off grade) est l’un des param\u00e8tres les plus influents dans l’\u00e9conomie d’un projet minier. Elle d\u00e9termine ce qui est consid\u00e9r\u00e9 comme minerai exploitable et ce qui est trait\u00e9 comme st\u00e9rile \u2014 et donc, directement, la taille…<\/p>","protected":false},"author":3,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-30237","page","type-page","status-publish","hentry"],"yoast_head":"\nArticle 2 - CCE Mining<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ccemining.com\/en\/article-2\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Article 2 - CCE Mining\" \/>\n<meta property=\"og:description\" content=\"Comment optimiser la teneur de coupure pour maximiser la VAN de votre projet minier ? La teneur de coupure (cut-off grade) est l’un des param\u00e8tres les plus influents dans l’\u00e9conomie d’un projet minier. Elle d\u00e9termine ce qui est consid\u00e9r\u00e9 comme minerai exploitable et ce qui est trait\u00e9 comme st\u00e9rile \u2014 et donc, directement, la taille...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/ccemining.com\/en\/article-2\/\" \/>\n<meta property=\"og:site_name\" content=\"CCE Mining\" \/>\n<meta property=\"article:modified_time\" content=\"2026-05-07T17:45:26+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/ccemining.com\/wp-content\/uploads\/2026\/05\/pexels-jplenio-2566850-1-scaled.jpg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/ccemining.com\\\/article-2\\\/\",\"url\":\"https:\\\/\\\/ccemining.com\\\/article-2\\\/\",\"name\":\"Article 2 - CCE Mining\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/ccemining.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/ccemining.com\\\/article-2\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/ccemining.com\\\/article-2\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/ccemining.com\\\/wp-content\\\/uploads\\\/2026\\\/05\\\/pexels-jplenio-2566850-1-scaled.jpg\",\"datePublished\":\"2026-05-07T16:44:59+00:00\",\"dateModified\":\"2026-05-07T17:45:26+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/ccemining.com\\\/article-2\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/ccemining.com\\\/article-2\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/ccemining.com\\\/article-2\\\/#primaryimage\",\"url\":\"https:\\\/\\\/ccemining.com\\\/wp-content\\\/uploads\\\/2026\\\/05\\\/pexels-jplenio-2566850-1-scaled.jpg\",\"contentUrl\":\"https:\\\/\\\/ccemining.com\\\/wp-content\\\/uploads\\\/2026\\\/05\\\/pexels-jplenio-2566850-1-scaled.jpg\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/ccemining.com\\\/article-2\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/ccemining.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Article 2\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/ccemining.com\\\/#website\",\"url\":\"https:\\\/\\\/ccemining.com\\\/\",\"name\":\"CCE Mining\",\"description\":\"Experts en exploitation mini\u00e8re \u00e0 Montr\u00e9al\",\"publisher\":{\"@id\":\"https:\\\/\\\/ccemining.com\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/ccemining.com\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/ccemining.com\\\/#organization\",\"name\":\"CCE Mining\",\"url\":\"https:\\\/\\\/ccemining.com\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/ccemining.com\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/ccemining.com\\\/wp-content\\\/uploads\\\/2024\\\/03\\\/cropped-LOGO-CCE-1-scaled-1.png\",\"contentUrl\":\"https:\\\/\\\/ccemining.com\\\/wp-content\\\/uploads\\\/2024\\\/03\\\/cropped-LOGO-CCE-1-scaled-1.png\",\"width\":2097,\"height\":762,\"caption\":\"CCE Mining\"},\"image\":{\"@id\":\"https:\\\/\\\/ccemining.com\\\/#\\\/schema\\\/logo\\\/image\\\/\"}}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Article 2 - CCE Mining","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/ccemining.com\/en\/article-2\/","og_locale":"en_US","og_type":"article","og_title":"Article 2 - CCE Mining","og_description":"Comment optimiser la teneur de coupure pour maximiser la VAN de votre projet minier ? 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