![\"Self-drilling](\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2020\/04\/2020-04-08-09.13.32.jpg\")
<\/p>\nHello, everyone<\/p>\n
This is Enta.<\/p>\n
Today, I'm going to talk about self-drilling rock bolts lol<\/p>\n
<\/p>\n
A self-drilling rock bolt is a rock bolt consisting of a bit, a rod, and a coupling, and<\/p>\n
It is primarily used as a temporary rock bolt in locations where the borehole wall cannot remain stable on its own.<\/p>\n
In some cases, it has recently come to be regarded as the standard approach.<\/p>\n
In the past, self-drilling rock bolts were used for permanent installations.<\/p>\n
As for why it ended up deviating from the original plan, the truth is...Unstable injection<\/span><\/strong><\/span>That's how it was.<\/p>\n The contractor claimed that the work had been completed.<\/p>\n A while back, I used to say that myself.<\/p>\n In reality, there were quite a few areas where I wasn't sure if the solution had been injected properly.<\/p>\n Then, during an audit somewhere, that instability was uncovered, and,Prohibited<\/span><\/strong>It became (the National Highway Agency, I think?).<\/p>\n The biggest challenge with self-drilling rock bolts is the drilling process.<\/p>\n Since this is used on a mountain where the natural slope isn't stable, it's only natural that the slope would collapse.<\/p>\n We'll continue drilling while flushing out the slurry.<\/p>\n Whether drilling by hand or with a machine, when the shank adapter is removed upon completion of drilling, the rod may wobble, orIf it hits the borehole wall, the wall will collapse.<\/strong><\/p>\n Even if it hasn't crumbled, the injection is performed through the hole in the rod itself.<\/p>\n If the drilling is not done properly, the hole will be blocked, making injection impossible.<\/span><\/strong><\/p>\n Since the injection hose isn't secured in place, it's not possible to inject from the tip.<\/p>\n That means the only option is to inject it through the mouth.<\/p>\n The key to injection is the deepest point<\/span><\/strong><\/span>That's why. If we can't do that, we won't even be able to verify that the injection took place.<\/p>\n This is the main source of the difficulty.<\/p>\n If we inject from the deepest point and cannot confirm the return flow, we will only be able to inject partially.<\/span><\/strong><\/p>\n As long as slurry is being discharged during drilling, it can be determined that the rock mass is self-supporting.<\/p>\n However, if the number of these Kriko (slimes) drops drastically or they stop appearing altogether, it means the system has collapsed.<\/p>\n At that point, the surgeon pulls the rod up; after pulling it up, they reinsert it and check the clasp.<\/p>\n I know I'm repeating myself, but ultimately, self-drilling tends to press forward regardless of whether slime appears or not.<\/p>\n Be careful when the Drilling Slime isn't around.<\/span><\/strong><\/span>That's it.<\/p>\n <\/p>\n See you later.<\/p>","protected":false},"excerpt":{"rendered":" Hello, everyone. This is Enta. Today, I\u2019m going to talk about self-drilling rock bolts lol. Self-drilling rock bolts: These are rock bolts consisting of a bit, a rod, and a coupling, and are mainly used as temporary rock bolts in places where the borehole walls cannot stand on their own\u2026<\/p>","protected":false},"author":2,"featured_media":43690,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[30],"tags":[116,416,799,1523,3347,5157],"class_list":["post-46874","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-lock-bolt","tag-116","tag-416","tag-799","tag-1523","tag-3347","tag-5157"],"acf":[],"yoast_head":"\nThe Difficulty of Self-Perforation<\/h3>\n
Injection<\/h4>\n
![\"Self-drilling](\"https:\/\/stat.ameba.jp\/user_images\/20160804\/23\/enta-d\/45\/2b\/j\/o0580048013715106446.jpg?caw=800\")
<\/p>\nCriteria for Decision-Making During Drilling<\/h3>\n
![\"Self-Drilling](\"https:\/\/stat.ameba.jp\/user_images\/20160804\/23\/enta-d\/24\/af\/j\/o0580048013715106447.jpg?caw=800\")
<\/p>\nKey Points for Installing Self-Drilling Rock Bolts, etc.<\/h3>\n
\n
\n(Risk of backflow when digging a water ditch through the peat section)<\/strong><\/span><\/li>\n