{"id":1482,"date":"2014-02-14T22:36:10","date_gmt":"2014-02-14T21:36:10","guid":{"rendered":"http:\/\/mdemierre.speleologie.ch\/?p=1482"},"modified":"2026-05-14T16:21:59","modified_gmt":"2026-05-14T15:21:59","slug":"desobstruction","status":"publish","type":"post","link":"https:\/\/www.techt.ch\/mdemierre\/?p=1482","title":{"rendered":"D\u00e9sobstruction en sp\u00e9l\u00e9ologie"},"content":{"rendered":"<p>Pour p\u00e9n\u00e9trer dans une cavit\u00e9, il est parfois n\u00e9cessaire de supprimer une obstruction qui bouche ce conduit ou qui en emp\u00eache le franchissement.\u00a0Certains indices, comme un courant d&rsquo;air ou la morphologie des galeries, motivent les sp\u00e9l\u00e9os a d\u00e9sobstruer. Il faut savoir que la majorit\u00e9 des premi\u00e8res en Suisse romande sont permises par les d\u00e9sobstructions.<\/p>\n<p><span style=\"text-decoration: underline;\">A la pelle et avec des bidons, pour enlever les bouchons de s\u00e9diments :<\/span><\/p>\n<p>Il est fr\u00e9quent qu&rsquo;une cavit\u00e9 soit obstru\u00e9e par du sable ou le plus souvent par de l&rsquo;argile provenant de la dissolution de la roche calcaire. C&rsquo;est alors qu&rsquo;il faut sortir pelles et bidons. Plus on creuse gros, plus il y aura de d\u00e9blais \u00e0 \u00e9vacuer ! Logique ! Quelle est alors la section id\u00e9ale ?<\/p>\n<ul>\n<li>Jusqu&rsquo;\u00e0 5 m\u00e8tres, il suffit de creuser assez pour passer en rampant.<\/li>\n<li>De 5 \u00e0 30 m\u00e8tres, la taille id\u00e9ale est celle permettant de passer \u00e0 quatre pattes. L&rsquo;id\u00e9al est la pelle de pionnier pli\u00e9e et des bidons d\u00e9coup\u00e9s ou des bacs.<\/li>\n<li>Plus de 30 m\u00e8tres, il faut progresser debout ou presque avec de plus gros moyens.<\/li>\n<\/ul>\n<div class=\"ast-oembed-container \" style=\"height: 100%;\"><iframe loading=\"lazy\" title=\"D\u00e9sobstruction d&#039;un bouchon d&#039;argile\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/Rcrau1rdys4?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/div>\n<p>&nbsp;<\/p>\n<p><span style=\"text-decoration: underline;\">Pour la roche en place et les blocs :<\/span><\/p>\n<p>Il est possible de casser de la roche avec un burin, une massette, une barre \u00e0 mine, un \u00e9clateur de roche ou un marteau piqueur.\u00a0Si l&rsquo;obstacle est constitu\u00e9 de roche compacte, le moyen le plus efficace est l&rsquo;explosif. Nul besoin d&rsquo;\u00e9normes explosions ! Quelques grammes d&rsquo;explosif bien plac\u00e9s\u00a0dans des charges for\u00e9es suffisent.<\/p>\n<p>&nbsp;<\/p>\n<div class=\"ast-oembed-container \" style=\"height: 100%;\"><iframe loading=\"lazy\" title=\"minage en sp\u00e9l\u00e9ologie\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/_vTQiAr5XLI?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/div>\n<p>&nbsp;<\/p>\n<p>Comment reconnait-on un vrais sp\u00e9l\u00e9o ? A la d\u00e9sobstruction ! \ud83d\ude09<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Pour p\u00e9n\u00e9trer dans une cavit\u00e9, il est parfois n\u00e9cessaire de supprimer une obstruction qui bouche ce conduit ou qui en [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1484,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ngg_post_thumbnail":0,"footnotes":""},"categories":[48,80,2],"tags":[50,37,27,19],"class_list":["post-1482","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-secours-technique","category-technique-speleologie","category-technique","tag-desobstruction","tag-exploration-2","tag-explosifs-2","tag-speleologie-2"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.0.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"Pour p\u00e9n\u00e9trer dans une cavit\u00e9, il est parfois n\u00e9cessaire de supprimer une obstruction qui bouche ce conduit ou qui en emp\u00eache le franchissement. Certains indices, comme un courant d&#039;air ou la morphologie des galeries, motivent les sp\u00e9l\u00e9os a d\u00e9sobstruer. Il faut savoir que la majorit\u00e9 des premi\u00e8res en Suisse romande sont permises par les d\u00e9sobstructions. 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