The installation steps of galvanized anchor rods for mining mainly include the following key steps, which ensure the correct installation and effective support of the anchor rods:
1, Preparation work
1. Check the anchor rod and accessories: Ensure that the specifications, length, and quality of the galvanized layer of the galvanized anchor rod meet the design requirements, and also check whether the connecting sleeve, nut, and other accessories are complete and of qualified quality.
2. Prepare tools: Prepare the necessary tools for installation, such as wrenches, windmills (or coal drills), manual mixers (or stirrers), angle gauges, etc.
3. Determine the hole position: The technical personnel shall determine the hole position according to the design requirements and mark prominent signs to ensure the accuracy of the drilling position.
2, Drilling and cleaning
1. Drilling: Select the appropriate drill bit for drilling based on the specifications and length of the anchor rod. During the drilling process, attention should be paid to adjusting the angle of the drill rod to ensure that the verticality and depth of the borehole meet the requirements. The drilling depth should be about 0.5m greater than the length of the anchor rod to facilitate installation and grouting.
2. Hole cleaning: After drilling, rinse the remaining soil and debris in the hole with pressure water to ensure that the hole is clean and free of foreign objects.
3, Install anchor rod
1. Placement of anchoring agent: Place a specified amount of anchoring agent (such as resin medicine roll) into the bottom of the hole.
2. Insert the anchor rod: Insert the galvanized anchor rod into the hole so that the threaded end of the anchor rod is exposed from the hole. During the insertion process, the anchoring agent can be pushed into the hole with the Fried Dough Twists end of the Fried Dough Twists metal rod body to ensure that the anchoring agent is evenly distributed in the hole.
3. Mixing and solidification: Start the wind anchor machine (or coal-fired drill) to drive the anchor rod to rotate and push it into the bottom of the hole at a constant speed. The stirring time is generally 20-35 seconds to fully mix the anchoring agent and generate a chemical reaction. After the mixing is completed, stop drilling and remove the mixer (or windlass). Wait for the anchoring agent to solidify for a period of time (usually 5-15 minutes), during which do not move or shake the rod.
4. Install the support plate and nut: After the anchoring agent solidifies, place the support plate (or load-bearing plate) and tighten the nut to the specified torque with a wrench. Ensure that the support plate is tightly attached to the rock wall or support surface to improve the support effect.
4, Subsequent work
1. Inspection and testing: After installation, conduct a visual inspection and anchoring force test on the anchor rod. Ensure that the anchor rod is not damaged, loose, and the anchoring force meets the design requirements.
2. Recording and archiving: Record key data and information during the installation process, such as drilling depth, anchor rod length, anchoring force test results, etc., and archive them for future reference.
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