{"version":"1.0","provider_name":"Robbins","provider_url":"https:\/\/www.robbinstbm.com\/es\/","title":"Recent Cutter Technology Advances to Efficiently Bore Through Extremely Challenging Conditions in Hard Rock - Robbins","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"0I3kmPFgIv\"><a href=\"https:\/\/www.robbinstbm.com\/es\/cutter-technology-advance\/\">Recent Cutter Technology Advances to Efficiently Bore Through Extremely Challenging Conditions in Hard Rock<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/www.robbinstbm.com\/es\/cutter-technology-advance\/embed\/#?secret=0I3kmPFgIv\" width=\"600\" height=\"338\" title=\"&#8220;Recent Cutter Technology Advances to Efficiently Bore Through Extremely Challenging Conditions in Hard Rock&#8221; &#8212; Robbins\" data-secret=\"0I3kmPFgIv\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script type=\"text\/javascript\">\n\/* <![CDATA[ *\/\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n\/\/# sourceURL=https:\/\/www.robbinstbm.com\/wp-includes\/js\/wp-embed.min.js\n\/* ]]> *\/\n<\/script>\n","thumbnail_url":"https:\/\/www.robbinstbm.com\/wp-content\/uploads\/2018\/05\/8398432384.jpg","thumbnail_width":850,"thumbnail_height":566,"description":"Extreme conditions for cutters can result in poor advance rates, catastrophic disc cutter failure, or unacceptable wear life of a disc cutter. For TBMs in hard rock, two of the most important parameters to consider are the cutter performance and the penetration rate. This paper presents the developments and challenges that have driven the last years\u2019 advances in cutter technology, as well as the results of those developments on recent projects."}