The mast of the rotary drilling rig is generally more than ten meters or even tens of meters long. If the operation is slightly improper, it is easy to cause the center of gravity to lose control and roll over.
The following are the 7 reasons for the rollover accident of the rotary drilling rig:
1. Since the rotary drilling rig needs to provide down force from the front of the equipment when drilling under pressure, most rotary drilling rigs are front-heavy and rear-light (the center of gravity is in the front), and the height of the mast makes the center of gravity easy to transfer (so the drill should be lowered as much as possible. rod suspension height).
Machine center of gravity forward and mast height are important causes of rollover
1. Poor road conditions: Most rollovers of rotary drilling rigs are caused by false road surfaces, which look solid, but are actually hollow.
2. Back filling the mud pool: Many machines overturned because the back filled mud pool was not marked and forgotten.
3. Soft road surface: Generally, the sidewalk is very narrow, and when the road surface is softened by rain or river water, it has almost no carrying capacity.
4. Collapsed hole: The mud was not prepared according to the geology, groundwater, or the groundwater was relatively rich, causing the surrounding of the casing to gradually collapse until it collapsed to the bottom of the drilling rig crawler, causing the crawler to hang in the air.
The main measures to prevent the rotary drilling rig from tip over:
1. Constantly adjust the center of gravity of the drilling rig according to the road conditions, such as: luffing position, mast tilt angle. The mast leans left and leans right. Drill pipe lifting height. Turn back to the boarding position. If the road conditions ahead are not clear, quickly lower the main roll and let the drill bucket test the road.
2. Drop the mast and retract the track: in severe road conditions, the mast can be dropped or the track can be retracted.
3. For the backfilled mud pool, mark the top of the pile. If the terrain is bad, don’t be afraid of trouble. When it’s time to drop the mast, you must drop the mast. If the road conditions ahead are uncertain, you can try to walk the machine. When walking the machine, you should keep adjusting the machine’s center of gravity according to the road conditions.
Gookma Technology Industry Company Limited is a hi-tech enterprise and a leading manufacturer of construction machinery such as rotary drilling rig, concrete mixer and concrete pump etc in China.
You are welcome to contact Gookma for further inquiry!
Post time: Jun-20-2023
