From Shovels to Machines
This invention relates to mining machines, primarily though not exclusively intended for coal mines, and relates particularly to machines known as continuous miners.
This invention relates to mining machines, primarily though not exclusively intended for coal mines, and relates particularly to machines known as continuous miners.
Inventor Joseph Francis Joy (September 13, 1883 - February 1957) was born in Cumberland, Maryland. He was introduced to coal mining at a young age, and himself had loaded coal in the old way. ... The continuous miner, a machine that extracted coal and loaded it as well, eventually replaced loading machines.
…by single machines, known as continuous miners, that broke off the coal from the seam and transferred it back to the haulage system. The Joy Ripper (1948) was the first continuous miner applicable to the room-and-pillar method.
Designed for mid- to high-seam, standard-width entry applications, the Joy 12CM12 continuous miner offers exceptional performance with a solid-head cutting head system and 38 in (965 mm) conveyor width. Designed for mid- to high-seam, standard-width entry applications, the Joy 12CM12 continuous miner offers exceptional performance with a solid ...
The "DOSCO Miner" was a made-in-Nova-Scotia continuous mining machine that helped mechanize coal mining in the 1950s and laid the groundwork for how modern coal mining is still done. ... the DOSCO Miner, and had it built at the Trenton steel works, which DOSCO owned, making it a uniquely Nova Scotian invention. In 1949, the DOSCO Miner was ...
The present invention relates to a novel continuous miner, comprising a cutting portion, shovel portion, a body portion, scraper conveyors, the support portion traveling, …
This paper will trace the development of underground coal mining machinery from the days of the tiny air-powered machines to today's 60-ton electric-powered continuous miners. Some important design features which have made the modern fixed-drum continuous miner a success will be examined.
The JOY 14CM continuous miner product line has been developed to meet the high productivity requirements of today's underground mining industry and is the product of choice for the world's top producing mines. Joy provides the ideal combination of …
Referring now to the continuous miner according to the invention shown in FIGS. 3-8, there is shown a chassis 2 and personnel cabin 4 mounted on crawler tracks 6. Typically the chassis 2 is 8.2 m long by 3.6 m wide, by 1.8 m high. A conveyor 8 extends from the front to the rear of the chassis. This conveyor section is tiltable around pivot 14 ...
A continuous miner having improvements therein for enabling the same to be advanced in a coal seam having a shortwall face extending concavely arcuate from one side wall defining one end ... This invention relates to coal mining and more particularly to improvements in the method and apparatus for advancing continuous mining machines in a coal ...
This invention relates to continuous mining machinery and more particularly to improvements in self-propelled crawler type continuous mining machines. The utilization of a pair of oppositely pitched oppositely rotated auger cutters in connection with a shortwall mining frame to achieve continuous operation is disclosed in Wilcox U.S. Pat. No ...
Continuous mining of underground metal mines closely combines mining technology system change with comprehensive mechanization and automation of mining, …
The continuous miner technology (CMT) is being adopted extensively in underground coal mines of India as mass production technology. This technology potentially eliminates the two-unit operating, namely the drilling and blasting. This elimination helps for better strata control and avoids the drillers working in unsafe conditions, maybe under the loose coal …
The Joy Manufacturing Company was a major manufacturer of mining and materials handling machinery built upon the invention of the first practical coal loading machine by Joseph F. Joy (1883-1957). It is a somewhat random collection of documents assembled and preserved by the former corporate secretary James Packer (1920-2008) for the purpose of ...
It is the monoblock type coalcutter being made of major parts such as cutting units, loading part, delivery section, running part, mainframe, driver's cabin, spooling systems the invention discloses a kind of electric drive track travelling open continuous miner.It can both be matched with scraper plate continuous haulage system or belt continuous haulage system, realize that …
Continuous miner manufacturers focus on furthering the development of new models with increased stability and other benefits. Many companies, including , aim to produce reliable machines with enhanced speed and better remote operations, such as the company's flagship Joy 12HM31 model.
Continuous mining currently accounts for about 49% of total U.S. underground coal production each year. Standard continuous miners can extract coal at a rate of up to 38 tons a minute depending upon the seam thickness. New, more powerful continuous miners are highly productive and are remotely controlled being designed for a variety of seams ...
It describes the JOY continuous miner product line which includes three machine classes for different mining heights: 14CM, 12CM, and 12HM series. Key components of the continuous miners are described, including the cutter, gathering head, conveyor, traction, dust collector, hydraulics, and electrical systems. Specifications for the Joy 12CM15 ...
This paper will trace the development of underground coal mining machinery from the days of the tiny air-powered machines to today's 60-ton electric-powered continuous miners. Some …
A continuous miner has a pivotal boom mounting a rotor carrying picks for attaching and dislodging mineral deposit in a mineral deposit seam within host rock. A thin layer of mineral deposit is left respectively against a roof and against a floor. ... In accordance with a third aspect, the invention extends to a continuous miner mounting ...
This invention relates generally to improvements in the mining of coal or the like from a solid seam thereof, and more particularly to a combination of apparatus for mining in a more efficient manner. The modern continuous miner is able to remove coal from a solid seam at such a …
FIELD: mining. SUBSTANCE: attached to body of continuous miner mounted on running gear are two working members with carriers having rock-cutting tools. Located between carriers and hydraulic cylinders which turn them is kinematic connection in form of articulated levers. Each carrier has, at least, two parts installed with shift to each other.
The invention provides a continuous mining machine control system for a coal mine based on image and data combination. The continuous mining machine control system consists of a mining laser orientation instrument and video navigation target matching device, a closed dustproof video gradienter observation box, a data and image monitoring main unit and a communication …
Abstract: The present invention relates to a mining system. The system includes a continuous miner for forming plunge tunnels from a roadway. A flexible conveyor system is coupled to the continuous miner for conveying mined material from the plunge tunnels. A controller is provided for controlling the continuous miner and the flexible conveyor ...
Beginning in the late 1940s, coal companies rapidly introduced longwall and continuous mining machines. Longwall machines sheer coal from the face in a circular motion. ... it was not profitable on a large scale until the invention of massive earth-moving equipment in the mid-20th century. Statewide, surface mining comprises less than 40 ...
The 12HM46 continuous miner, with a dual gathering head system, is ideal for industrial mineral mining applications, including trona, gypsum, potash, and salt. The 12HM46, with a 1473 mm (58 in.) cutter head diameter, is the largest and most powerful drum-style continuous miner in our product lineup. With a machine mass of 154,000 kg (340,000 […]
The Continuous Mining System (CMS) was an innovation project developed by Codelco, in Chile, that intended to create a continuous material handling system for block and panel caving operations. With the objective of illustrating the impacts and implications of implementing a disruptive innovation project, the CMS initiative is below described ...
The document discusses continuous miners, which are machines used in underground coal mining. It consists of a large rotating drum equipped with tungsten carbide teeth that scrape coal from the seam. Early versions date …
First introduced in the late 1940's, continuous miners provided a quantum leap in the speed and efficiency of extracting coal. Modern versions operate on basically the same principal as their predecessors using a large rotating steel drum …
With continuous surface mining, there is a high level of consistency in particle sizes, resulting in better mineral recovery in later heap leaching stages. On top of that, avoiding big chunks of rocks — very common in blasting — increases the hauling process's efficiency as more material is transported in a given spatial volume.
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