USA US374357A USA USA US A US A US A US 374357 A US374357 A US 374357A US A US A US A US A US A US A Authority US United States Prior art keywords carriers machine cutting tools coal Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.
ELECTRIC MININGMACHINERY, WITH SPECIAL REFERENCE TO THE APPLICATION OF ELECTRICITY TO COALCUTTING, PUMPING, AND ROCKDRILLING. (INCLUDES PLATES AND APPENDIX). Authors: L B ATKINSON, C W ATKINSON. Source: Minutes of the Proceedings of the Institution of Civil Engineers, Volume 104, Issue 1891, 1 Jan 1891 (89113) COAL. CUTTING. MACHINERY.
US475833A Coalcutting machine Google Patents Coalcutting machine . Download PDF Info Publication number US475833A. US475833A US475833DA US475833A US 475833 A US475833 A US 475833A US 475833D A US475833D A US 475833DA US 475833 A US475833 A US 475833A Authority US United States
Coalcutting machine. Download PDF Info Publication number US818619A. ... coal Substances description 14; Mouth Anatomy description 6; chest Anatomy description 4; UPMXNNIRAGDFEHUHFFFAOYSAN Bromoxynil Chemical compound OC1=C ...
Download PDF Info Publication number US801583A. ... Authority US United States Prior art keywords machine coal rod cutting fender Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed ...
The cutters are placed on the coal mining machines in the amount of 3896 pieces, depending on the design of the executive body (Fig. 1). Figure 1. Working element of coal mining machine with cutting tools In 2011 134 coal mining machines operated in Russian mines, 108 of them being produced in Ukraine, Poland, Germany and the USA [1].
During automatic and intelligent cutting at the coal mining face, complex geological conditions (fold structure, fault structure and magmatic intrusion) easily cause distinct occurrence conditions of coal rock seams (gangue, inclusion, or fault in the coal and rock), which induces different coalrock cutting performances of shearer picks.
Download PDF Info Publication number US904623A. ... Authority US United States Prior art keywords cutting coal machine motors bolt Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed ...
The size of coal chips, produced during coal cutting operations, is of prime importance from the viewpoint of feed size desired by power plants. Proper chip size in cutting can eliminate primary crushing and inturn save energy. Achieving a designated size of chip is intimately linked with the drum design inter alia the wrap angle, line spacing of picks and pick size. Operating parameters ...
The productivity of coalcutting machines can be increased and the quality indices of the cut coal improved by means of new, less energyconsm~ng methods of coal cutting. In certain conditions the percussive method of coal cutting satisfies these requirements [13]. In this connection, increasing attention has recently been paid to finding or ...
GATE END BOX. It is used to supply 550 volt AC to the coal cutting machine working at coal faces. The maximum distance of gate end box from the machine is 100 meter. For putting ON, OFF the switch at 550 volt on the machine itself may produce a spark which is turn may ignite firedamp or coal dust. Hence to avoid this there is pilot switch on the coal cutting machine which works at 30 volts.
simulate wet conditions that occur during the coal cutting process. The tail section of the continuous mining machine can be swung 30 degrees off center to strategically place the mined product. The chain flight bars impact the side flex plates that guide the conveyor when the tail section is swung.
161 views 62 pages Coal Cutting Machine Uploaded by Sai Hello Copyright: © All Rights Reserved Flag for inappropriate content of 62 Coal Face Mechanization • Deployment of machines at the working place from where mineral/ coal has to be extracted is known as face mechanization. • During the last 50 years, significant changes have
Figure 1. Working element of coal mining machine with cutting tools In 2011 134 coal mining machines operated in Russian mines, 108 of them being produced in Ukraine, Poland, Germany and the USA [1]. Coal mining machine cutting tools play a key role in
Download PDF Info Publication number USA. ... 1952 H. G. LEWIS COAL CUTTING AND LOADING MACHINE 5 SheetsSheet 3 Filed July 22. 1949 Harold G. Lewis Patented May 6, 1952 COAL CUTTING AND LOADING MACHINE Harold G. Lewis, Peytona, W. Va., assignor of thirtythree and onethird per cent to Jesse C. Clendenin and thirtythree and onethird ...
China is the world's largest coal producer and consumer. At present, coal is the main energy source in China and will still serve as its basic energy source in 2050 [1,2,3,4].In recent years, large coal mines in Shanxi, Shaanxi, and Inner Mongolia have been put into operation, and fully mechanized faces (FMMFs) with large mining heights contribute to fulfilling the overall target of annual ...
Coalcutting machine Download PDF Info Publication number USA. ... Authority US United States Prior art keywords machine shaft coal tunnel truck Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy ...
(PDF) A methodology for designing cutting drum of surface miner to achieve production of desired chip size A methodology for designing cutting drum of surface miner to achieve production...
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).
The CoalCutting Machine described in the present paper has been worked daily or nightly for nearly two years at the Platt Lane Colliery of the Wigan and Whiston Coal Co., in a seam of coal known by the name of the "Pemberton Little Coal" or "Pemberton Yard Mine."
Coalcutting machine Download PDF Info Publication number USA. ... Authority US United States Prior art keywords machine skid wheels coal running Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy ...
coal cutting machine machine Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired Lifetime Application number USA Inventor Hubert L Smith Original Assignee Hubert L ...
misc{etde_78946, title = {Selection procedure of coal cutting machine} author = {Singh, T N} abstractNote = {Selection of equipment for cutting of coal is undergoing radical modification with optimisation of energy requirement, cutting array and design of bits. An experimental study was undertaken to define power requirements for ploughing and shearing of coal by a particular geometry of ...
The object of the invention is to provide a readily controllable and durable machine for mining coal, which will enable the coal to be mined in large and solid lumps, with a relatively small amount of slack, and also will permit a selective mining of the coal so that diiferent grades in different strata may be kept separate from each other and slate or clay strata may be kept out of the coal.
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