The steps of rock bolt construction are what we need to understand, the following five points are the construction points of the rock bolts we summarized.

1.        Positioning: after passing the excavation section inspection, draw the bolt hole position on the rock surface according to the design requirements.

2.        Drilling: excavation guide hole is made by artificial hand-held wind drill. The technical requirements of making hole: aperture ?38~42mm; opening deviation less than 2%, the hole depth is 3~5cm longer than the bolt insertion part.

3.        Insert the rock bolt slowing into the hole 3~5cm away from the bottom of the hole. After the rod is inserted, the hole is tightly closed with cement mortar or other, and the vent hole is set.

4.        Rock bolt grouting: grouting pressure is adjusted at 0.5~0.8Mpa, slowly inject the slurry, when the vent hole has slurry flowing out, close the vent hole and stop the grouting after 3~5 minutes of steady pressure injection.

5.        Pressure pad and nut mounting, after the grouting is completed, the pad and nut are added to the end of the anchor rod, and the nut is not fastened. After 24shours of grouting, tighten the nut with a tightening force of 10KN/m~20KN/m.

Zongxiang is a professional company, we can provide you various rock bolt, include friction bolt, frp bolt, left-hand rock bolt, etc. High quality products for you. If you have any demand, you can contact us for more information.

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