What Is a Rock Drill?

Rock drill is a tool used to directly mine stone. It drills holes in the rock formations to put explosives into the rock to complete the mining of stone or other stonework. In addition, rock drills can also be converted into destroyers to break hard layers such as concrete. According to its power source, rock drills can be divided into four categories: pneumatic rock drills, internal combustion rock drills, electric rock drills and hydraulic rock drills.

The rock drill works on the principle of impact crushing. When working, the piston makes high-frequency reciprocating motion, which constantly impacts the tail. Under the action of the impact force, the pointed wedge-shaped drill bit crushes the rock and cuts it into a certain depth to form a dent. After the piston retracted, the drill turned through a certain angle, the piston moved forward, and when it hit the tail again, a new dent was formed. The fan-shaped rock mass between the two dents is shredded by the horizontal component force generated on the drill bit. The piston continuously impacts the tail of the drill, and continuously inputs compressed air or pressure water from the center hole of the drill to discharge the slag out of the hole, forming a circular hole of a certain depth. ^[2]

1. Before rock drilling, check the integrity and rotation of each component (including rock drill, bracket or rock drilling trolley), fill in necessary lubricants, check the air passage, whether the water passage is unobstructed, and whether the connection joints are firm.

2. Ask for help near the working surface, that is, check whether there is live rock or turquoise on the roof near the working surface and the second gang, and make necessary treatment.

3. The flat blasthole position on the working surface must be flattened before drilling to prevent slipping or shifting of the blasthole.

4. It is strictly forbidden to dry the eyes. We must adhere to wet rock drilling. When operating, turn on the water first, then turn on the air, and when the drilling is stopped, turn off the wind and then turn off the water. When opening the eye, run at low speed first, and then drill at full speed after drilling to a certain depth.

5. Drilling personnel are not allowed to wear gloves when drilling.

6. When using air leg drilling, pay attention to standing posture and position. Never press on the body, or stand under the drill rod in front of the rock drill to prevent injury.

7. When abnormal sound is found in rock drilling, when the powder discharge water is abnormal, the machine should be stopped and inspected to find out the cause and eliminate it before continuing drilling.

8. When the rock drill is withdrawn or the drill rod is replaced, the rock drill can run at a slow speed. Pay attention to the position of the steel drill of the rock drill, avoid the drill rod from falling off and hurt people, and close the gas path in time.

9. When rock drilling with an air-leg rock drill, the top should be firmly secured to prevent the top from slipping and hurting people.

10. When using the upward rock drill to shrink the bracket, the drill rod must be supported to prevent the drill rod from falling down and hurting people. ^[3]