Rotary drilling rigs are equipped with different drilling tools according to the geology. When working in thick pebble layers, rotary drilling rigs use sand drilling heads and rock opening drills. In situations with dense and hard pebbles, rock opening drills are used to disturb and break the geological structure, followed by using sand drilling heads to remove debris. When working in thick pebble layers, it is important to check the mud in the casing and the surrounding terrain changes. If any abnormalities around the casing are found, drilling should be stopped immediately to identify the cause and prevent accidents. When operating the drill rod pressing mechanism, pay attention to the changes in drill pressure, which should not exceed the pressure that the hydraulic system can withstand; the drill rod can only be lifted when it is unlocked. The speed of raising and lowering the drill head should be slow; too fast movement of the drill head can easily create a vacuum and cause borehole collapse.

During construction, the drill rig's steel wire rope and winch should be regularly inspected, and worn steel wire ropes should be replaced timely. The drilling speed should not be too fast, and a combination of forward and reverse drilling methods should be used to form a protective wall. It is important to clearly remember the position of each drilling increment before raising the drill head and compare it with the position after re-drilling. This can help timely detect changes inside the borehole and prevent accidents.