Using a dolly pusher for split set installation involves several steps and requires careful attention to detail to ensure the safety and effectiveness of the support system. Below is a comprehensive guide outlining the process:

1. Gather Equipment:

Split set bolts: These are steel bolts with a split end designed to expand when inserted into a hole.

Dolly pusher: A specialized tool used to push the split set bolts into place.

Hammer: To drive the split set bolts into the hole.

Safety gear: Including gloves, goggles, and a hard hat.

2. Prepare the Work Area:

Ensure the work area is clear of debris and hazards.

Identify the locations where split sets will be installed.

3. Drill Holes:

Use a rock drill to create holes of the appropriate diameter and depth in the rock where support is needed.

The diameter and depth of the holes should match the specifications of the split set bolts being used.

4. Insert Split Set Bolts:

Place a split set bolt into the drilled hole, ensuring that the split end is facing outward.

Insert the dolly pusher over the protruding end of the split set bolt.

5. Push Split Set Bolt into Place:

Apply pressure to the dolly pusher, pushing the split set bolt into the hole.

Continue pushing until the split set bolt is fully seated in the hole.

6. Remove Dolly Pusher:

Once the split set bolt is in place, remove the dolly pusher from the protruding end of the bolt.

7. Secure Split Set Bolt:

Use a hammer to strike the exposed end of the split set bolt, driving it further into the hole.

This action causes the split end of the bolt to expand, anchoring it securely in the surrounding rock.

8. Repeat the Process:

Continue drilling holes and installing split set bolts until the desired support system is in place.

Ensure that split set bolts are installed at regular intervals and according to engineering specifications to provide adequate support.

9. Inspect Installation:

Once all split set bolts are installed, visually inspect the support system to ensure that bolts are properly seated and secure.

Check for any signs of instability or defects that may require additional attention.

10. Test Support System:

If necessary, conduct load testing to verify the effectiveness of the support system.

This may involve applying force to the installed split set bolts to ensure they can withstand the anticipated loads.

11. Monitor and Maintain:

Regularly inspect the split set support system for signs of wear, damage, or degradation.

Replace any damaged or compromised split set bolts as needed to maintain the integrity of the support system.

12. Safety Considerations:

Always wear appropriate personal protective equipment when installing split set bolts.

Follow all safety protocols and procedures to minimize the risk of accidents or injuries.

Ensure that all workers involved in the installation process are trained and competent in the use of the equipment and techniques involved.

By following these steps and exercising caution and attention to detail, you can effectively use a dolly pusher for split set installation to create a reliable and secure support system in underground mining or tunneling operations.