{"id":12135,"date":"2022-03-28T08:38:48","date_gmt":"2022-03-28T08:38:48","guid":{"rendered":"https:\/\/tononeng.com\/tonon-usa\/?page_id=12135"},"modified":"2022-08-17T09:40:19","modified_gmt":"2022-08-17T09:40:19","slug":"sievers-miniature-drill-test","status":"publish","type":"page","link":"https:\/\/tononeng.com\/tonon-usa\/services\/list-of-tests\/sievers-miniature-drill-test\/","title":{"rendered":"Sievers&#8217; Miniature Drill test"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"12135\" class=\"elementor elementor-12135\" data-elementor-settings=\"[]\">\n\t\t\t\t\t\t\t<div class=\"elementor-section-wrap\">\n\t\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-552e6db8 elementor-section-full_width elementor-section-height-default elementor-section-height-default\" data-id=\"552e6db8\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-5725aa2f\" data-id=\"5725aa2f\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-1b8a8a44 elementor-widget elementor-widget-image-carousel\" data-id=\"1b8a8a44\" data-element_type=\"widget\" data-settings=\"{&quot;slides_to_show&quot;:&quot;1&quot;,&quot;navigation&quot;:&quot;none&quot;,&quot;autoplay&quot;:&quot;yes&quot;,&quot;pause_on_hover&quot;:&quot;yes&quot;,&quot;pause_on_interaction&quot;:&quot;yes&quot;,&quot;autoplay_speed&quot;:5000,&quot;infinite&quot;:&quot;yes&quot;,&quot;effect&quot;:&quot;slide&quot;,&quot;speed&quot;:500}\" data-widget_type=\"image-carousel.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.5.2 - 22-12-2021 *\/\n.elementor-widget-image-carousel .swiper-container{position:static}.elementor-widget-image-carousel .swiper-container .swiper-slide figure{line-height:inherit}.elementor-widget-image-carousel .swiper-slide{text-align:center}.elementor-image-carousel-wrapper:not(.swiper-container-initialized) .swiper-slide{max-width:calc(100% \/ var(--e-image-carousel-slides-to-show, 3))}<\/style>\t\t<div class=\"elementor-image-carousel-wrapper swiper-container\" dir=\"ltr\">\n\t\t\t<div class=\"elementor-image-carousel swiper-wrapper swiper-image-stretch\">\n\t\t\t\t\t\t\t\t<div class=\"swiper-slide\"><figure class=\"swiper-slide-inner\"><img decoding=\"async\" class=\"swiper-slide-image\" src=\"https:\/\/tononeng.com\/tonon-usa\/wp-content\/uploads\/2022\/03\/1_ucs-without-moduli-con-testo-540x166.jpeg\" alt=\"UCS without Moduli\" \/><figcaption class=\"elementor-image-carousel-caption\">UCS without Moduli<\/figcaption><\/figure><\/div><div class=\"swiper-slide\"><figure class=\"swiper-slide-inner\"><img decoding=\"async\" class=\"swiper-slide-image\" src=\"https:\/\/tononeng.com\/tonon-usa\/wp-content\/uploads\/2022\/03\/2_ucs-with-moduli-con-testo-540x166.jpeg\" alt=\"UCS with Moduli\" \/><figcaption class=\"elementor-image-carousel-caption\">UCS with Moduli<\/figcaption><\/figure><\/div><div class=\"swiper-slide\"><figure class=\"swiper-slide-inner\"><img decoding=\"async\" class=\"swiper-slide-image\" src=\"https:\/\/tononeng.com\/tonon-usa\/wp-content\/uploads\/2022\/03\/6_brazilian-con-testo-540x166.jpeg\" alt=\"Brazilian Test\" \/><figcaption class=\"elementor-image-carousel-caption\">Brazilian Test<\/figcaption><\/figure><\/div><div class=\"swiper-slide\"><figure class=\"swiper-slide-inner\"><img decoding=\"async\" class=\"swiper-slide-image\" src=\"https:\/\/tononeng.com\/tonon-usa\/wp-content\/uploads\/2022\/03\/6_abrasion-con-testo-540x166.jpeg\" alt=\"Abrasion Test\" \/><figcaption class=\"elementor-image-carousel-caption\">Abrasion Test<\/figcaption><\/figure><\/div><div class=\"swiper-slide\"><figure class=\"swiper-slide-inner\"><img decoding=\"async\" class=\"swiper-slide-image\" src=\"https:\/\/tononeng.com\/tonon-usa\/wp-content\/uploads\/2022\/03\/5_cerchar-con-testo-540x166.jpeg\" alt=\"Cerchar Test\" \/><figcaption class=\"elementor-image-carousel-caption\">Cerchar Test<\/figcaption><\/figure><\/div><div class=\"swiper-slide\"><figure class=\"swiper-slide-inner\"><img decoding=\"async\" class=\"swiper-slide-image\" src=\"https:\/\/tononeng.com\/tonon-usa\/wp-content\/uploads\/2022\/03\/5_brittleness-con-testo-540x166.jpeg\" alt=\"Brittleness Test\" \/><figcaption class=\"elementor-image-carousel-caption\">Brittleness Test<\/figcaption><\/figure><\/div><div class=\"swiper-slide\"><figure class=\"swiper-slide-inner\"><img decoding=\"async\" class=\"swiper-slide-image\" src=\"https:\/\/tononeng.com\/tonon-usa\/wp-content\/uploads\/2022\/03\/3_thin-section-analyses-con-testo-540x166.jpeg\" alt=\"Thin Section Analyses\" \/><figcaption class=\"elementor-image-carousel-caption\">Thin Section Analyses<\/figcaption><\/figure><\/div>\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-09b6b66 elementor-section-stretched elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"09b6b66\" data-element_type=\"section\" data-settings=\"{&quot;stretch_section&quot;:&quot;section-stretched&quot;,&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-f195418\" data-id=\"f195418\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-cfbdca6 elementor-widget elementor-widget-shortcode\" data-id=\"cfbdca6\" data-element_type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<\/p><p id=\u201cbreadcrumbs\u201d><span><span><a href=\"https:\/\/tononeng.com\/tonon-usa\/\">Home<\/a><\/span><\/p><p>\t\t<div class=\"elementor-shortcode\"><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-b49d543 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"b49d543\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-c3e41a3\" data-id=\"c3e41a3\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-f867a25 elementor-widget elementor-widget-hub_fancy_heading\" data-id=\"f867a25\" data-element_type=\"widget\" data-widget_type=\"hub_fancy_heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\n\t\t<div id=\"ld-fancy-heading-69ebd526d8708\" class=\"ld-fancy-heading\">\n\t\t\t<h3 class=\"ld-fh-element elementor-heading-title lqd-highlight-underline lqd-highlight-grow-left h3\"  > Rock drilling tests: the Sievers' Miniature Drill test<\/h3>\t\t<\/div>\n\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-115b607 elementor-widget elementor-widget-text-editor\" data-id=\"115b607\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.5.2 - 22-12-2021 *\/\n.elementor-widget-text-editor.elementor-drop-cap-view-stacked .elementor-drop-cap{background-color:#818a91;color:#fff}.elementor-widget-text-editor.elementor-drop-cap-view-framed .elementor-drop-cap{color:#818a91;border:3px solid;background-color:transparent}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap{margin-top:8px}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap-letter{width:1em;height:1em}.elementor-widget-text-editor .elementor-drop-cap{float:left;text-align:center;line-height:1;font-size:50px}.elementor-widget-text-editor .elementor-drop-cap-letter{display:inline-block}<\/style>\t\t\t\t<p><em>The design of an underground excavation includes the delicate phase of estimating the drillability of the rocks. The Sievers &#8216;Miniature Drill Test is a drillability test that evaluates, using an index called Sievers&#8217; J-Value (SJ), the ability of a rock to be pierced by a metal tip.<\/em><\/p><p>The Sievers drillability test was developed by the Swedish H. Sievers in the 1950s and subsequently implemented by the Norwegian University of Science and Technology <strong>(NTNU)<\/strong> and the Norwegian research company <strong>SINTEF<\/strong>.<\/p><p>The Sievers perforability test provides an estimate of the &#8220;hardness&#8221; (or resistance to indentation) of a rock surface: it is performed on a cylindrical specimen, the bases of which are plane parallel and obtained by cutting with a diamond saw.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-dea706e elementor-widget elementor-widget-image\" data-id=\"dea706e\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.5.2 - 22-12-2021 *\/\n.elementor-widget-image{text-align:center}.elementor-widget-image a{display:inline-block}.elementor-widget-image a img[src$=\".svg\"]{width:48px}.elementor-widget-image img{vertical-align:middle;display:inline-block}<\/style>\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"780\" height=\"565\" src=\"\/\/www.w3.org\/2000\/svg&#039; viewBox=&#039;0 0  &#039;%3E%3C\/svg%3E\" class=\"attachment-large size-large ld-lazyload\" alt=\"\" data-src=\"https:\/\/tononeng.com\/tonon-usa\/wp-content\/uploads\/2022\/02\/sievers_j_apparato.jpg\" data-srcset=\"https:\/\/tononeng.com\/tonon-usa\/wp-content\/uploads\/2022\/02\/sievers_j_apparato.jpg 992w, https:\/\/tononeng.com\/tonon-usa\/wp-content\/uploads\/2022\/02\/sievers_j_apparato-300x217.jpg 300w\" data-sizes=\"(max-width: 780px) 100vw, 780px\" data-aspect=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Drill-counterweight system for carrying out the Sievers' Miniature Drill Test. The drill drills a hole at a speed of about 200 revolutions per minute through Vidia bits, the shape of which is defined by the NTNU-SINTEF Standard (Source: Dahl, 2003 - modified).<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8b1c0ce elementor-widget elementor-widget-text-editor\" data-id=\"8b1c0ce\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>The Sievers&#8217; Miniature Drill Test is carried out thanks to a special drill &#8211; similar to the one shown in the figure above &#8211; equipped with a counterweight: the latter keeps Vidia points in pressure against the surface of the specimen for the entire duration of the test; this therefore consists in making a number of holes ranging from 4 to 8 and measuring their depth. The figure below shows an example of what the rock specimen looks like once the test is complete.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2f24961 elementor-widget elementor-widget-image\" data-id=\"2f24961\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"478\" height=\"541\" src=\"\/\/www.w3.org\/2000\/svg&#039; viewBox=&#039;0 0  &#039;%3E%3C\/svg%3E\" class=\"attachment-large size-large ld-lazyload\" alt=\"\" data-src=\"https:\/\/tononeng.com\/tonon-usa\/wp-content\/uploads\/2022\/03\/sievers_j_provino.jpeg\" data-srcset=\"https:\/\/tononeng.com\/tonon-usa\/wp-content\/uploads\/2022\/03\/sievers_j_provino.jpeg 478w, https:\/\/tononeng.com\/tonon-usa\/wp-content\/uploads\/2022\/03\/sievers_j_provino-265x300.jpeg 265w\" data-sizes=\"(max-width: 478px) 100vw, 478px\" data-aspect=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Rock specimen after performing the test: the Sievers' J-Value (SJ) coefficient is obtained from the average of the depth measurements of the five holes, useful for characterizing the drillability of a rock.<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-55caf15 elementor-widget elementor-widget-text-editor\" data-id=\"55caf15\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>The average of the depths of these holes leads to a coefficient, known as <strong>Sievers&#8217;J-Value (SJ),<\/strong> which will in turn be used for the calculation of the <strong>Drilling Rate Index (DRI) and Cutter Life Index (CLI)<\/strong>.<\/p><p>To obtain the perforability indices indicated by the NTNU-SINTEF standard, it is necessary to perform other drills, in addition to the Sievers&#8217; Miniature Drill Test: the Brittleness test, the Abrasion Value test and the Abrasion Value Cutter Steel test.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>UCS without Moduli UCS with Moduli Brazilian Test Abrasion Test Cerchar Test Brittleness Test Thin Section Analyses Rock drilling tests: the Sievers&#8217; Miniature Drill test The design of an underground excavation includes the delicate phase of estimating the drillability of the rocks. The Sievers &#8216;Miniature Drill Test is a drillability test that evaluates, using an [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":12126,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"inline_featured_image":false,"footnotes":""},"class_list":["post-12135","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.6.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Sievers&#039; Miniature Drill test - Tononeng<\/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:\/\/tononeng.com\/tonon-usa\/services\/list-of-tests\/sievers-miniature-drill-test\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Sievers&#039; Miniature Drill test - Tononeng\" \/>\n<meta property=\"og:description\" content=\"UCS without Moduli UCS with Moduli Brazilian Test Abrasion Test Cerchar Test Brittleness Test Thin Section Analyses Rock drilling tests: the Sievers&#8217; Miniature Drill test The design of an underground excavation includes the delicate phase of estimating the drillability of the rocks. 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