longwall coal-cutting machine

RealTime Methane Prediction in Underground Longwall Coal Mining ... MDPI

RealTime Methane Prediction in Underground Longwall Coal Mining ... MDPI

Detecting the formation of explosive methaneair mixtures in a longwall face is still a challenging task. Even though atmospheric monitoring systems and computational fluid dynamics modeling are utilized to inspect methane concentrations, they are not sufficient as a warning system in critical regions, such as near cutting drums, in realtime. The long shortterm memory algorithm has been ...

Longwall machinery | PPT SlideShare

Longwall machinery | PPT SlideShare

2. Longwall shearers The coal is cut from the coal face by a machine called the shearer (power loader). This machine can weigh 75120 tonnes typically and comprises a main body, housing the electrical functions, the tractive motive units to move the shearer along the coalface and pumping units (to power both hydraulic and water functions).

Vestvolden, Capital Region of Denmark, Denmark AllTrails

Vestvolden, Capital Region of Denmark, Denmark AllTrails

This trail takes you through the scenic surroundings of Mågeparken and along Vestvolden. Vestvolden was a Copenhagen fortification from 1820 1920 and stretches over 15 km. Vestvolden as seen today is one of the last fortifications in Copenhagen west. You will also come through parts of Hvidovre and past an open grass area.

(PDF) Underground mining Methods ResearchGate

(PDF) Underground mining Methods ResearchGate

Longwall stoping is applicable to bedded deposits of uniform shape, li mited thickness an d large horizontal extensio n (, a coal seam, a potash layer or the reef, the bed of quartz pebbles ...

Longwall Shearers Selection Guide: Types, Features, Applications ...

Longwall Shearers Selection Guide: Types, Features, Applications ...

Longwall mining is a type of mining where aggregate, typically coal, is extracted in panel sections of approximately m by 200400 m by 34 km. The width of the panel referred to as the face of the seam is undercut by another piece of mining equipment, such as a roadheader or continuous miner.

Joy Longwall Shearers Underground Mining India | Komatsu Mining Corp.

Joy Longwall Shearers Underground Mining India | Komatsu Mining Corp.

Joy introduced the first allelectric shearer in 1976. Since then, Joy shearers have been working in the world's most productive longwall mines and in the most demanding conditions. Models are available for seam ranges from to meters ( to 30 ft.). In addition, the series has a complete series of installed ranging arm power options ...

What Is Underground Mining? KoneCarbide

What Is Underground Mining? KoneCarbide

As the cutting machine cuts the ore from the longwall face, a continuously moving armored conveyor transports slices of the ore to the drifts, and then the slices are transferred out of the mine. The above process is mainly for soft rocks, such as coal, salt, etc. For hard rocks, such as gold, we cut them by drilling and blasting.

salvaging installation of powered support longwall equipment

salvaging installation of powered support longwall equipment

• With coal cutting machine and/or blasting in conjunction with individual supports. • With Shearer Loader in conjunction with individual supports (Closed circuit hydraulic props) ... Powered support longwall equipment is an integrated set of machinery used for fully mechanized extraction of coal from a longwall face. PSLW technology is a ...

Staff View: Longwall coal cutting machinery;

Staff View: Longwall coal cutting machinery;

Longwall coal cutting machinery; a practical treatment combining experience of the coal face with machine shop practice for mining students, engineers, and all engaged in coal mining; Saved in: Bibliographic Details

Automation in longwall coal mining: A stateoftheart review

Automation in longwall coal mining: A stateoftheart review

The longwall mining methodology has advanced in the past few decades. The recent trend has focused mainly on enhanced productivity and automation (Peng et al. 2019). To achieve this, interest in ...

Mechanized Longwall Mining | PDF | Coal Mining | Mining Scribd

Mechanized Longwall Mining | PDF | Coal Mining | Mining Scribd

coal and other minerals from deposits included a survey of longwall tech niques used by mines in the Midwest in 1936 (184), a comprehensive review of coal mining practices (including longwall) in Europe in 1939 (153), descrip tions of two German coal winning machines published in 1946 (5, 25), a summary of conditions and practices ...

Remote and automatic control of longwall mining

Remote and automatic control of longwall mining

article{osti_, title = {Remote and automatic control of longwall mining}, author = {Wood, P A}, abstractNote = {The recent literature concerned with the monitoring, remote control and automation of longwall mining equipment is reviewed. The mining equipment considered is the coal cutting machine, the armoured face conveyor, and the powered supports.

Longwall top coal caving design for thick coal seam in very poor ...

Longwall top coal caving design for thick coal seam in very poor ...

Longwall mining is one of the most applicable and effective production methods for underground coalmines. Longwall mining is attractive for producers due to its high production rate (Galvin 2016).Mechanized longwall mining requires heavy machinery and equipment that are shearer for coal cutting, hydraulic shields for roof control, and armored face conveyor (AFC) for the haulage of the coal.

Longwall automation CSIRO

Longwall automation CSIRO

[Text appears on screen: 90% longwall] [Image changes to show an increasing currency value] It contributes 7 billion to Australia's export income every year. [Image changes to show a computerised image of a shearer machine working underground] Miners carefully drive a machine with large rotating cutting drums back and forth across a coal seam.

(PDF) RealTime Methane Prediction in Underground Longwall Coal Mining ...

(PDF) RealTime Methane Prediction in Underground Longwall Coal Mining ...

RealTime Methane Prediction in Underground Longwall Coal Mining Using AI. ... locations and operational conditions of the cutting machine. Results show that the algorithm can predict explosive ...

Longwall Mining an overview | ScienceDirect Topics

Longwall Mining an overview | ScienceDirect Topics

CoalMining Techniques and Coal Fires. Stanley R. Michalski, in Coal and Peat Fires: A Global Perspective, 2011 Longwall Coal Mining. The longwallmining method is a continuous mining system that was developed for mining coal deposits uniform in thickness and slope or where the overburden pressures may crush support pillars or for improving productivity. . This method relies on the complete ...

Threedimensional physical model experiment of mininginduced ...

Threedimensional physical model experiment of mininginduced ...

The coal area is km long, km wide, and is spread over approximately km 2. The mine was founded in 1965 and is a stateowned enterprise with an annual output of up to 600,000 tons. The coal seam studied in this work strikes at 330340° with a length of 547 m and inclines at 240250° with a length of 176 m.

Longwall | Komatsu

Longwall | Komatsu

Longwall mining is an efficient mining method and using the right equipment can make it even more profitable. Joy longwall systems incorporate shearers, roof supports, face conveyors and more into one system that can be tightly orchestrated by advanced electronics — including cuttingedge automation.

PDF Reliability analysis of drum shearer machine at mechanized longwall mines

PDF Reliability analysis of drum shearer machine at mechanized longwall mines

longwall mining, coal is extracted from a very large block or "panel" of coal by an automated cutting machine called "shearer" that moves along a track parallel to the working coal face.

Longwall Coal Cutting Machines the Future

Longwall Coal Cutting Machines the Future

For more than 30 years shearer loaders have been the most important winning machines for,longwall mining. While the machines of the first generation had a driving power of only 100 or so kW, the present day shearer loaders may be powered by more than 1000 kW. Daily outputs of 24000 tonnes have now been reached, but this still does not set a limit. If the deposit conditions allow, further ...

Longwall mining Wikipedia

Longwall mining Wikipedia

Longwall mining is a form of underground coal mining where a long wall of coal is mined in a single slice (typically m (2 ft 0 in 19 ft 8 in) thick). The section of rock that is being mined, known as the longwall panel, is typically 34 km ( mi) long, but can be up to km ( mi) long and 250400 m (8201,310 ft) wide. History

PDF Topic 7: Underground Mining Methods Longwall Sublevel ... ResearchGate

PDF Topic 7: Underground Mining Methods Longwall Sublevel ... ResearchGate

Longwall mining machines are typically 150250 meters in width and to 3 meters high. Longwall miners extract " panels " rectangular blocks of coal as wide as the face the

Control system for longwall shearer PEASE; ROBERT E.

Control system for longwall shearer PEASE; ROBERT E.

The invention claimed is: 1. A control system for a longwall coal shearer assembly, said shear assembly comprising a track positionable in a tunnel along a seam of coal having a generally sine wave contour and a shearing machine adapted to move along said track, said shearing machine including a body having a longitudinal reference, a shearing drum, and an arm pivotally supported at one end on ...

(PDF) Longwall; Sublevel Caving and Block Caving ... ResearchGate

(PDF) Longwall; Sublevel Caving and Block Caving ... ResearchGate

Longwall mining machines are typically 150250 meters in width and to 3 meter s high. Longwall miners extr act " panels " rectangular blocks of coal as wide as the f ace the

Development of noise controls for longwall shearer cutting drums

Development of noise controls for longwall shearer cutting drums

Recently developed engineering controls have shown great promise in reducing equipment noise within Mining. [28,29,44, 45, 46] Incorporation and continued development of these technologies, both ...

 Longwall Mining | GEOG 000 John A. Dutton eEducation Institute

Longwall Mining | GEOG 000 John A. Dutton eEducation Institute

Atlas Copco Longwall Mining of Coal Longwall mining of coal is a high production and high productivity method, employing sophisticated electrical, mechanical, and hydraulic systems, as well as computerbased monitoring and control systems. Most modern (coal) longwall faces are semiautomated.

Longwall Face Automation: Coal Seam Floor Cutting Path Planning ... MDPI

Longwall Face Automation: Coal Seam Floor Cutting Path Planning ... MDPI

Space adaptability between mining equipment and coalrock mass, to ensure the machines cut in a coal seam, is an importance technique in longwall mining automation. In order to guide the mining equipment cutting in the coal seam, a cutting path planning method based on multiple hierarchical clustering was proposed. Morphology similarity and the coplanarity measurement method were defined to ...

The applicability of longwall mining to American coal seams

The applicability of longwall mining to American coal seams

The longwall method of mining coal is applied effectively to a variety of geologic conditions and, therefore, it has many modifica­ tions. Its principal characteristic, however, is that the entire coal seam is extracted as nearly as possible in one operation, with the overburden being allowed to cave either partially or completely.

USB1 Longwall coal cutter and loader Google Patents

USB1 Longwall coal cutter and loader Google Patents

A longwall coal cutter and loader for longwall mining operations has a machine body drivable along a longwall conveyor in the longitudinal direction of the longwall surface, and at least two cutting rollers complementing or overlapping each other with their cutting sections. In order to improve the transverse transport of the mined material onto the longwall conveyor, to optimize the ...

Development of a floodedbed scrubber for removing coal dust at a ...

Development of a floodedbed scrubber for removing coal dust at a ...

A fullscale physical model of a coal cutting machine (longwall shearer) was fabricated. • A dust scrubber was designed and integrated into the fullscale physical model. • The system was installed in a longwall test gallery for evaluation. • Results of shakedown tests indicate respirable dust reduction from 46% to 53%. •

Anderton Shearer Loader Wikipedia

Anderton Shearer Loader Wikipedia

The Anderton Shearer Loader is a coal cutting machine which was used in the UK coal industry after 1953. The Anderton Power Loader with its cutting drum up to five feet in diameter was patented in 1953. ... The machine works by "shearing" coal from a longwall coal face as it moved along the face. The shear drum is around metres in diameter ...

Appendix F: Underground Coal Mining Methods and Engineering Dust ...

Appendix F: Underground Coal Mining Methods and Engineering Dust ...

As with the continuousmining machine, where worn cutting bits must be replaced, drill bits must also be replaced when worn to prevent excessive generation of respirablesize particles. ... Schatzel, S., R. Krog, and H. Dougherty. 2012. Field study of longwall coal mine ventilation and bleeder performance. Transactions of the Society for Mining ...

What is Longwall Mining Method and its types?

What is Longwall Mining Method and its types?

In longwall mining, proper maintenance of the machine is required. Water spray is required after coal cutting. We can not work further after the occurrence of danger, but in the board pillar, we can continue in other galleries. Difference between longwall advancing and longwall retreating: Longwall Advancing

What Can Go Wrong: The Dangers in Longwall Mining Popular Mechanics

What Can Go Wrong: The Dangers in Longwall Mining Popular Mechanics

Here is how longwall mining works and some of the hazards. It will take days and maybe weeks to know exactly what caused the explosion on Monday afternoon in Massey Energy's Upper Big Branch mine ...