{"id":22633,"date":"2023-08-25T11:21:43","date_gmt":"2023-08-25T09:21:43","guid":{"rendered":"https:\/\/sisgeo.com\/non-classifiee\/ptolemaida-coal-mine-waste-disposal-the-deepest-dex-installation-150-m-greece\/"},"modified":"2024-01-17T12:47:24","modified_gmt":"2024-01-17T11:47:24","slug":"ptolemaida-coal-mine-waste-disposal-the-deepest-dex-installation-150-m-greece","status":"publish","type":"post","link":"https:\/\/sisgeo.com\/fr\/projets\/ptolemaida-coal-mine-waste-disposal-the-deepest-dex-installation-150-m-greece\/","title":{"rendered":"Ptolemaida coal mine waste disposal \u2013 The deepest DEX installation (150 m) &#8211; Greece"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"22633\" class=\"elementor elementor-22633 elementor-6612\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e5b61b3 e-flex e-con-boxed e-con e-parent\" data-id=\"e5b61b3\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5963969 elementor-widget elementor-widget-text-editor\" data-id=\"5963969\" data-element_type=\"widget\" data-e-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\t\t<p>This area, where the two DEX columns are installed, is an old waste rock dump site of an open pit coal mine. The depth of the waste is approximately 150 m and consists of alternating layers of silt, sand, gravels, limestone and lignite.<\/p>\n<p>Instruments installed:<br>\u2022 Two QJ quick joint inclinometer columns, 150m length, with 11 DEX magnet rings each<br>\u2022 Two DEX in-place extensometer columns, each one composed by 11 DEX settlement probes<br>\u2022 Two OMNIAlog data loggers with accessories (solar power supply and 3G router)<\/p>\n<p>The scope of the DEX columns is to monitor the settlement of the above strata and evaluate the stability of the surface in order to plan the construction of a new road passing on the surface of the waste dump.<br>Logging of the borehole during drilling was essential, because the sequence of the layers was not known and large voids were also very likely to be encountered due to decomposition of the lignite.<br>Grouting of the inclinometer casing was a little bit difficult due to the voids encountered and the high permeability of the sand and gravel layers.<br>The OMNIA was programmed to take measurements every 12 hours and send with e-mail to selected recipients. The measurements were correlated with the absolute settlement of the surface, measured with surveying instruments.<br>The analysis of the measurements presents a clear view of the distribution of the settlements with depth and for each layer.<br>Long term monitoring is necessary in order to decide if it is feasible to proceed to the construction of the new road.<\/p>\n<p>Courtesy of Eurotech SA, Greece (<a href=\"http:\/\/www.eurotech-ltd.gr\/en\">www.eurotech-ltd.gr\/en<\/a>)<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>This area, where the two DEX columns are installed, is an old waste rock dump site of an open pit coal mine. The depth of the waste is approximately 150 m and consists of alternating layers of silt, sand, gravels, limestone and lignite. Instruments installed:\u2022 Two QJ quick joint inclinometer columns, 150m length, with 11 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":6617,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[556,772,486,771,754,546],"tags":[],"class_list":["post-22633","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-extensometres-dex-et-dex-s-3d","category-cavernes","category-enregistreur-de-donnees-omnialog","category-mines-fr","category-projets","category-tube-inclinometrique-quick-joint"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.2 (Yoast SEO v27.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Ptolemaida coal mine waste disposal \u2013 The deepest DEX installation (150 m) - Greece - Sisgeo<\/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:\/\/sisgeo.com\/fr\/projets\/ptolemaida-coal-mine-waste-disposal-the-deepest-dex-installation-150-m-greece\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ptolemaida coal mine waste disposal \u2013 The deepest DEX installation (150 m) - Greece\" \/>\n<meta property=\"og:description\" content=\"This area, where the two DEX columns are installed, is an old waste rock dump site of an open pit coal mine. The depth of the waste is approximately 150 m and consists of alternating layers of silt, sand, gravels, limestone and lignite. Instruments installed:\u2022 Two QJ quick joint inclinometer columns, 150m length, with 11 [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/sisgeo.com\/fr\/projets\/ptolemaida-coal-mine-waste-disposal-the-deepest-dex-installation-150-m-greece\/\" \/>\n<meta property=\"og:site_name\" content=\"Sisgeo\" \/>\n<meta property=\"article:published_time\" content=\"2023-08-25T09:21:43+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-01-17T11:47:24+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/sisgeo.com\/wp-content\/uploads\/2023\/08\/0_ptolemaida_coal_mine_waste_disposal_greece_dex_sisgeo.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"960\" \/>\n\t<meta property=\"og:image:height\" content=\"540\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Staff Pipeline\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Staff Pipeline\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/sisgeo.com\/fr\/projets\/ptolemaida-coal-mine-waste-disposal-the-deepest-dex-installation-150-m-greece\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/sisgeo.com\/fr\/projets\/ptolemaida-coal-mine-waste-disposal-the-deepest-dex-installation-150-m-greece\/\"},\"author\":{\"name\":\"Staff Pipeline\",\"@id\":\"https:\/\/sisgeo.com\/fr\/#\/schema\/person\/ad7e82c7990ef88823f081613e1100e2\"},\"headline\":\"Ptolemaida coal mine waste disposal \u2013 The deepest DEX installation (150 m) &#8211; 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