What is a walking dragline?
What is a walking dragline?
n. (Mining & Quarrying) a very large-capacity dragline mounted on feet or pads instead of tracks.
How much do draglines cost?
Draglines in mining A large dragline system used in the open pit mining industry costs approximately US$50–100 million. A typical bucket has a volume ranging from 40 to 80 cubic yards (30 to 60 cubic metres), though extremely large buckets have ranged up to 168 cubic metres (5,900 cu ft).
Do they still make draglines?
Modern Draglines Giant draglines have long since been made obsolete, but dragline excavators are still very much in use. The largest available dragline on the market today is Joy Global’s P&H 9020XPC.
What are the various uses of draglines?
Draglines or continuous excavators, which are used to strip the overburden from the lower seams, are large pieces of equipment and require large, level areas from which to work. Draglines and continuous excavators have dig depth limitations.
How long does dragline take to complete one cycle?
A dragline can be said to have a simple routine of work, which is composed of digging and walking. Mine design team has little control on walking, which is a steady process. Almost all walking draglines take a step of approx. 2 m within a period of 0.75-1 min.
How much does a dragline operator make?
Dragline Operators in America make an average salary of $41,042 per year or $20 per hour. The top 10 percent makes over $66,000 per year, while the bottom 10 percent under $25,000 per year.
How many types of dragline are there?
There are three types of dragline; Wheel mounted dragline. Crawler type dragline. Truck mounted dragline/portable dragline.
What is the maximum gradient for dragline?
Even thinner seams with a limiting gradient of 1 in 6 to 1 in 8 are now considered to be mineable by draglines. A dragline may be considered as one of the world’s biggest robots which is about 100 m high and is used as a walking crane in surface coal mines.
What is break even stripping ratio?
You will recall that the maximum allowable stripping ratio, SRmax, also called break-even stripping ratio, is the maximum amount of overburden/waste that can be extracted per unit of ore at the economic pit limit.
How do you become a dragline operator?
Career Requirements
- Step 1: Complete Dragline Operator Training. Most dragline operators are trained on the job, assisting and learning from more experienced workers.
- Step 2: Complete Safety Training.
- Step 3: Advance to Dragline Operator.
- Step 4: Beyond Dragline Operator.
What is dragline operator?
A dragline operator’s main responsibility is to manage the levers that control the dragline excavator. You use controls to lower the bucket down to the ground and then drag it along in a straight path to gather materials. You may also be responsible for providing light maintenance or adjustments to a dragline machine.
Why dragline is not used in metal mines?
It is not suitable to load piled up material as a shovel. Draglines are popular with many mines due to their reliability and extreme low waste removal cost. However, they have very limited application due to their boom height, boom length and dig-depth.
