{"id":7268,"date":"2025-08-25T11:40:22","date_gmt":"2025-08-25T15:40:22","guid":{"rendered":"https:\/\/wipware.com\/?p=7268"},"modified":"2026-09-14T15:36:20","modified_gmt":"2026-09-14T19:36:20","slug":"effect-of-excessive-burden-distance-on-blasting-result-part-2","status":"publish","type":"post","link":"https:\/\/wipware.com\/fr\/kb\/effect-of-excessive-burden-distance-on-blasting-result-part-2\/","title":{"rendered":"Effet d&#039;une distance de remblayage excessive sur le r\u00e9sultat du dynamitage \u2013 Partie 2"},"content":{"rendered":"<p class=\"wp-block-paragraph\"><strong><em>Que se passe-t-il au niveau de la fragmentation de votre explosion lorsque la distance entre les rang\u00e9es (charge) est excessive\u00a0?<\/em><\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-introduction-excessive-burden\">Introduction \u2013 Charge excessive<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Selon Prasad et al. (2017), la taille des fragments de roche est un param\u00e8tre essentiel d&#039;un point de vue \u00e9conomique dans toute exploitation mini\u00e8re \u00e0 ciel ouvert. Un espacement excessif entre les rang\u00e9es, souvent synonyme de charge accrue lors des op\u00e9rations de dynamitage, peut r\u00e9sulter d&#039;un forage mal r\u00e9alis\u00e9 (facteur humain, facteur machine).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-applying-chapman-jouguet-cj-condition\">Application de la condition de Chapman-Jouguet (CJ)\u00a0:<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La condition de Chapman-Jouguet (CJ) est approximativement v\u00e9rifi\u00e9e pour les ondes de d\u00e9tonation des explosifs puissants. Elle stipule que la d\u00e9tonation se propage \u00e0 une vitesse \u00e0 laquelle les gaz r\u00e9actifs atteignent tout juste la vitesse du son au moment o\u00f9 la r\u00e9action cesse. Dans ce cas, une charge excessive affecte la distribution de l&#039;\u00e9nergie explosive en diminuant l&#039;efficacit\u00e9 de la propagation de l&#039;onde de choc, ce qui influe sur la formation de microfissures.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-cj-plane-theory\">Th\u00e9orie du plan CJ<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Selon la th\u00e9orie du plan CJ, une charge optimale assure une propagation efficace de l&#039;onde de choc et la formation de microfissures, \u00e9l\u00e9ments cruciaux pour la rupture de la roche. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">En cas de charge excessive, l&#039;\u00e9nergie se dissipe avant de fracturer correctement la roche, ce qui entra\u00eene une fragmentation insuffisante. Ce transfert d&#039;\u00e9nergie inefficace perturbe le processus de d\u00e9tonation, r\u00e9duisant l&#039;efficacit\u00e9 du tir et produisant des fragments de roche plus gros et non bris\u00e9s.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"629\" src=\"https:\/\/wipware.com\/wp-content\/uploads\/2024\/07\/Prasad-et-al.-2017-excessive-burden-part-2-1-1024x629.jpg\" alt=\"\" class=\"wp-image-7269\" srcset=\"https:\/\/wipware.com\/wp-content\/uploads\/2024\/07\/Prasad-et-al.-2017-excessive-burden-part-2-1-1024x629.jpg 1024w, https:\/\/wipware.com\/wp-content\/uploads\/2024\/07\/Prasad-et-al.-2017-excessive-burden-part-2-1-300x184.jpg 300w, https:\/\/wipware.com\/wp-content\/uploads\/2024\/07\/Prasad-et-al.-2017-excessive-burden-part-2-1-768x472.jpg 768w, https:\/\/wipware.com\/wp-content\/uploads\/2024\/07\/Prasad-et-al.-2017-excessive-burden-part-2-1-18x12.jpg 18w, https:\/\/wipware.com\/wp-content\/uploads\/2024\/07\/Prasad-et-al.-2017-excessive-burden-part-2-1.jpg 1100w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-burden-distance-affects-rock-fragmentation\">La distance de la charge influe sur la fragmentation des roches<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Cet article utilise les donn\u00e9es de Prasad et al. (2017) pour expliquer plus en d\u00e9tail l&#039;effet des augmentations de la charge de 2,5 \u00e0 3 m. Comme le montre la droite de r\u00e9gression, l&#039;analyse a r\u00e9v\u00e9l\u00e9 que la taille de la fragmentation de l&#039;explosion (D50 et D95) augmente avec une corr\u00e9lation positive sup\u00e9rieure \u00e0 50%.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cela montre que plus la distance de remplissage est importante, plus les fragments de roche g\u00e9n\u00e9r\u00e9s par le tir sont gros. Un remplissage excessif, \u00e0 facteur de poudre \u00e9gal, affectera in\u00e9vitablement la taille et la forme des fragments. Pour \u00e9valuer l&#039;influence du remplissage actuel sur la fragmentation, il est indispensable d&#039;analyser l&#039;\u00e9tat du forage avant le chargement.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">De plus, \u00e9valuez les r\u00e9sultats de vos tirs de mine \u00e0 l&#039;aide d&#039;un logiciel d&#039;analyse d&#039;images. Le logiciel WipFrag est le plus recommand\u00e9 pour l&#039;\u00e9valuation des tirs de mine\u00a0; il b\u00e9n\u00e9ficie d&#039;une longue exp\u00e9rience et int\u00e8gre les derni\u00e8res innovations technologiques. Ce logiciel offre des avantages consid\u00e9rables pour \u00e9valuer l&#039;influence du terrain minier sur la fragmentation. Son application mobile permet une analyse pratique directement sur le terrain.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-deep-learning-capabilities\">Capacit\u00e9s d&#039;apprentissage profond<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Les capacit\u00e9s d&#039;apprentissage profond permettent un gain de temps d&#039;analyse gr\u00e2ce \u00e0 un traitement rapide des images. L&#039;outil de d\u00e9tection des blocs identifie les fragments surdimensionn\u00e9s, tandis que l&#039;analyse des sp\u00e9cifications permet de corr\u00e9ler les r\u00e9sultats du dynamitage avec les performances du concasseur primaire en aval, garantissant ainsi des tailles de fragments optimales pour un concassage efficace et une meilleure productivit\u00e9 globale.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"528\" src=\"https:\/\/wipware.com\/wp-content\/uploads\/2024\/07\/Prasad-et-al.-2017-excessive-burden-part-2-2-1024x528.jpg\" alt=\"\" class=\"wp-image-7270\" srcset=\"https:\/\/wipware.com\/wp-content\/uploads\/2024\/07\/Prasad-et-al.-2017-excessive-burden-part-2-2-1024x528.jpg 1024w, https:\/\/wipware.com\/wp-content\/uploads\/2024\/07\/Prasad-et-al.-2017-excessive-burden-part-2-2-300x155.jpg 300w, https:\/\/wipware.com\/wp-content\/uploads\/2024\/07\/Prasad-et-al.-2017-excessive-burden-part-2-2-768x396.jpg 768w, https:\/\/wipware.com\/wp-content\/uploads\/2024\/07\/Prasad-et-al.-2017-excessive-burden-part-2-2-1536x792.jpg 1536w, https:\/\/wipware.com\/wp-content\/uploads\/2024\/07\/Prasad-et-al.-2017-excessive-burden-part-2-2-18x9.jpg 18w, https:\/\/wipware.com\/wp-content\/uploads\/2024\/07\/Prasad-et-al.-2017-excessive-burden-part-2-2.jpg 1858w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u00c0 suivre pour la partie 3 \u2013 Vous pouvez \u00e9galement retrouver les trois parties sur la page Facebook de Giant Miner\u00a0: <a href=\"https:\/\/www.facebook.com\/GiantMiner\">https:\/\/www.facebook.com\/GiantMiner<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-references\">R\u00e9f\u00e9rences<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Prasad, S., Choudhary, BS et Mishra, AK (ao\u00fbt 2017). Effet du rapport bourrage\/charge et du facteur de poudre sur la fragmentation de la roche induite par le dynamitage\u00a0: une \u00e9tude de cas. Dans IOP conference series\u00a0: materials science and engineering (Vol.\u00a0225, n\u00b0\u00a01, p.\u00a0012191). IOP Publishing.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-download-wipfrag-at-https-wipware-com-get-wipfrag\">T\u00e9l\u00e9chargez WipFrag sur <a href=\"https:\/\/wipware.com\/fr\/get-wipfrag\/\">https:\/\/wipware.com\/get-wipfrag\/<\/a><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Pour la partie 3, cliquez ici\u00a0: <a href=\"https:\/\/wipware.com\/fr\/kb\/effect-of-excessive-burden-distance-on-blasting-result\/\">https:\/\/wipware.com\/effect-of-excessive-burden-distance-on-blasting-result\/<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vous avez manqu\u00e9 la premi\u00e8re partie ? La voici : <a href=\"https:\/\/wipware.com\/fr\/kb\/effect-of-excessive-burden-distance-on-blasting-result-part-1\/\">https:\/\/wipware.com\/effect-of-excessive-burden-distance-on-blasting-result-part-1\/<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>What happens to your blast fragmentation when you have excessive inter-row distance (burden)? Introduction &#8211; Excessive Burden According to Prasad et al. (2017), rock fragmentation size is a very important parameter for an economical point of view in any surface mining. Excessive inter-row distance, often referred to as an increased burden in blasting operations, can [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":7270,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[91],"tags":[58],"class_list":["post-7268","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-kb","tag-wipfrag"],"acf":{"related_posts":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.7 (Yoast SEO v28.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Effect of Excessive Burden Distance on Blasting Result - Part 2 &#8226; WipWare<\/title>\n<meta name=\"description\" content=\"What happens to your blast fragmentation when you have excessive burden? 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