Deformed Steel Bars rock bolt

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Rebar and anchor applied in mine roadway surrounding rock of underground engineering and support, to ensure that the mine roadway and surrounding rock stability of underground engineering. Its structural characteristics: full length rod body have rolling straight thread, length and other strength; Tighten with prestressed gasket and ball head nut. It is better than that of round steel processing of anchor rod, the advantage is:, anchor end and fastening end without machining; , such as strength, high material utilization; And anchoring strength; And is equipped with prestressed gaskets, easy to control the installation quality; , fast installation, etc. Is a kind of section material, save work, such as the strength of the new bolt, has wide application prospects. Detail descriptions Before have not been sprayed concrete cover, screw anchor with anchor tension or torsion torque wrench are measured directly. After the clamp bolt, slow uniform pressure, until the pressure gauge reading value to design the corresponding numerical, or make the bolt looseness, generally do not do the destructive test. After the bolt is sprayed concrete cover, screw anchor with anchor rod detectors after proven, will anchor plane out again. Test number per 30 ─ 50 meters long or cavity per 300 root anchor a set of samples, each group shall not be less than 3, should be at checkpoints in a row within the same section of the bolt uniform selection.

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jining hengwang mining machinery co,ltd

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