Who invented the continuous miner?
The first successful use of a continuous miner took place in 1943; the machine was built by the American Harold Silber. Joy acquired the patent for this continuous miner. In 1958, the first continuous miner was used in South African coal mining. In Europe, the first continuous miner were used in the 1960s.
When was the continuous miner invented?
The Joy Ripper (1948) was the first continuous miner applicable to the room-and-pillar method.
How much does a joy miner weigh?
145,000 lbs.
Specifications for 12CM12
| Cutter head design | Solid head |
|---|---|
| Minimum cutting height *Without dust collector | 55 in 59 in 85 in |
| Weight | 145,000 lbs. |
| Ground pressure | 31 psi |
| Ground clearance | 12 in |
What is joy miner?
[′jȯi ′mīn·ər] (mining engineering) A continuous miner weighing about 15 tons (13,600 kilograms) and made up of a turntable, a ripper bar, and a discharge boom conveyor; used mainly in coal headings and in extraction of coal pillars.
How much does a Joy continuous miner weigh?
How long is a continuous miner?
The 12HM series continuous miners can be designed to match mine specific haulage systems. Different conveyor lengths and conveyor chain speeds are available to optimize the haulage system performance, whether it is batch or continuous haulage.
How much does a longwall shearer cost?
A single longwall machine of this size costs $70 million, but at current coal prices, it pays for itself in about two months.
What is mine live selling?
They’re called miners because they Mine in the Comments section when they want to buy an item after a seller shows it off.
What is the best condition suitable for longwall method?
This technique is ideally suited to deep, very gassy coal seams with low to medium permeability (1–10 md). Its effectiveness may be reduced if the coal seam is deeper than 4000 ft where the coal seam permeability is generally less than one microdarcy.
What is Joy Joy miner?
What is a joy 12hm continuous miner?
Continuous miners offer a highly productive alternative to traditional drill and blast mining systems. With multiple models available, Joy 12HM continuous miners can be applied in seams from 2 to 6 meters (79 to 236 inches).
What is the largest type of continuous miner?
The largest and most powerful Joy drum-style continuous miner, with a machine mass of 154,000 kg (340,000 lbs.) and a maximum cutting height of 6 m (20 ft.). Engineered to help productively mine industrial minerals like trona, gypsum, potash and salt.
Which 12hm46 is the best continuous heavy miner?
With the most mass and installed cutting power, up to 850 kW (1,140 HP), the 12HM46 is engineered to be our most productive continuous heavy miner. Continuous miners offer a highly productive alternative to traditional drill and blast mining systems.