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我队使用φ56金刚石钻头配单动双管钻进8～9级混合岩化片麻岩,由于岩石坚硬,研磨性大,岩层破碎,施工中岩心易堵塞,回次进尺短,有时仅钻进0.2米就迂堵提钻,不但工人劳动强度大,而且影响钻头寿命和台月进尺。为此,在学习外地经验的基础上,我们采取了以下做法。 1.认真抓好卡簧的选用下钻前检查卡簧是否好用。先用手试一下弹性,再选一块较完整的,上回次取出的下部岩心,将卡簧
Our team used φ56 diamond drill bit to drill 8-9 mixed gneiss with single action double pipe. Because of hard rock, big abrasiveness and rock broken, rock core is easy to block during construction, 0.2 meters on the detours to mention drilling, not only the labor intensity of workers, but also affect the life of the drill and the Taiwan month footage. To this end, we have taken the following approach based on our experience in the field. 1. Seriously grasp the choice of the circlip Check the circlip before drilling is easy to use. First try the flexibility by hand, then choose a more complete, the last time removed the lower core, the retainer