The present invention relates to an impact coal cutting machine for coal cutting work on a fully mechanized coal cutting working face in a coal mine, which is composed of a Tshaped impact cutter frame, cutter teeth, an impact transmission box, an energy storing mechanism, a coal filling plough, a rocking arm, an auxiliary rocking arm, a turning reversing mechanism, a safety protection device ...
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The processes of gas emission into the working face from coal, cut by the mining machine with the simultaneous top coal caving on to the conveyor located behind the powered support units, are ...
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Coalcutting machine Download PDF Info ... Prior art keywords mounting cutter bar coal motor cutter 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.)
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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.
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USA US1687A US168725A USA US A US A US A US 1687 A US1687 A US 1687A US 168725 A US168725 A US 168725A US A US A US A Authority US United States Prior art keywords connector chain coal jib cutting machine Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.
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The first chain coal cutting machine was invented in Coatbridge in 1871 by John Alexander of the iron and coalmasters William Baird and Company. This kind of coal cutter works much like a chainsaw, with sharp metal teeth attached to a moving chain.
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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.
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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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Mechanical cutting. Our comprehensive range of mechanical cutting equipment offers effective solutions for a wide range of underground mining and construction applications, including rapidentry roadway development, demanding production settings without drilling and blasting, as well as boring of ore passes and ventilation shafts.
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Coal cutting machine Download PDF Info Publication number USA. ... Authority US United States Prior art keywords machine frame pedestals elements drum 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 ...
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US862831A US344656A USA US862831A US 862831 A US862831 A US 862831A US 344656 A US344656 A US 344656A US A US A US A US 862831 A US862831 A US 862831A Authority US United States Prior art keywords coal machine cutting machine bar cutter Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.
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The antiscatter device for coal of described winning machine cutting part passes through two semicircular arms (6) relative fixed on the cutting units drum shaft, and can rotate with cutting units during use, semicircular arms is assemblied in inboard cylinder, and a convex slot is arranged on the drum arc spillplate can turn to diverse location with the lifting of cutting units ...
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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 ...
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US476162A Coalcutting machine Google Patents Coalcutting machine . Download PDF Info Publication number US476162A. US476162A US476162DA US476162A US 476162 A US476162 A US 476162A US 476162D A US476162D A US 476162DA US 476162 A US476162 A US 476162A Authority US United States
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2. To increase the coal output of a face. Advantages of a Coal Cutting Machines were: Straight and systematic advance at the whole face Because of the systematic advance of the whole face, systematic roof supprots can be set to provide a uniform subsidence of the roof beds behind the moving face. This is important in longwall face.
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US409870A Coalcutting machine Google Patents Coalcutting machine . Download PDF Info Publication number US409870A. US409870A US409870DA US409870A US 409870 A US409870 A US 409870A US 409870D A US409870D A US 409870DA US 409870 A US409870 A US 409870A Authority US United States
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Two types of coalcutting machines are used for longwall mining: shearers and pl ows. Shearers predominate . The p low is a much simpler machine, used mostly for relatively thin (42 inches or less ...
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A coal cutting machine has a rotary cutter drum mounted on a machine adapted to travel the length of a coal face, the drum has picks mounted thereon for cutting coal from the face, and includes at least one electrically operated sensitive pick engaging the coal face and to produce an electric signal proportional to the cutting force on the pick.
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USA USA USA USA US A US A US A US A US A US A US A US A US A US A US A US A Authority US United States Prior art keywords frames coal bar cutting machine machine Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.
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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.
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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 ...
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Download PDF Info Publication number ... 167857A US A US A US A US A US A US A Authority US United States Prior art keywords machine coal chain apron cutting Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. ... cutting process ...
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Cutting Machine. A machine that usually cuts coal with a 10 to 15cm slot. The slot allows room for the expansion of the broken coal. ... Universal Coal Cutter. A type of coal cutting machine that makes horizontal cuts into a coal face at any point between the bottom and top. The cutter bar can be twisted to make cuts at any angle to the ...
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DASCO is a family owned company, helping families in need of home medical equipment since 1987. Our home office is located in Westerville, Ohio with several branches throughout Ohio, West ia, Kentucky, Indiana, Michigan and Texas to serve you. DASCO was established in 1987 by Don Seeley and is now owned by his children, Jason and Rachel.
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US510455A Coalcutting machine Google Patents Coalcutting machine . Download PDF Info Publication number US510455A. US510455A US510455DA US510455A US 510455 A US510455 A US 510455A US 510455D A US510455D A US 510455DA US 510455 A US510455 A US 510455A Authority US United States
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evaluation of coal cutting equipment. The tool life of bits is limited by their wear rate. It occurs because of relative frictional motion between rock/coal and tool. Wear of the cutting tools is one of the most important process parameters for evaluating the economy of process and efficiency of the operation (Maidl et al. 2008).In general ...
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A material supplier from Belgium would like to produce limestone powder for his custome...
India is rich in various mineral resources and it is an important mineral processing market
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