Method for cutting coal wall and counting lump coal rate by 2D simulated fully mechanized coal mining face roller

Abstract

The invention discloses a method for cutting a coal wall and counting a lump coal rate by a 2D simulated fully mechanized coal mining surface roller, which is suitable for mining research. The methodcomprises the steps of: setting ball element and wall element data in software in a linear bonding model, and generating ball elements in the wall elements to establish an initial simulation model; establishing an early-stage uniaxial compression and Brazilian splitting test initial model, determining a proportional relation between mesoscopic parameters of the model and macroscopic physical and mechanical parameters of a coal body, and establishing an initial coal body model; generating a roller model, and endowing the roller with a proper rotating speed and a horizontal rightward speed to cut the coal body model until cutting is completed; and counting the cut model lump coal rate, comparing the cut model lump coal rate with the actual lump coal rate of the reference working face, and adjusting the rotating speed and the horizontal speed of the model roller until the model lump coal rate is the same as the actual lump coal rate of the working face. Simulation software can be directlyused for counting the lump coal cutting rate of the working face, operation is easy, and the problem that the coal mining efficiency is reduced due to lump coal rate counting in the working face is solved.

Description

technical field [0001] The invention relates to a method for simulating fully-mechanized mining face drum cutting coal wall and counting lump coal rate, especially suitable for a method of 2D simulated fully mechanized mining face drum cutting coal wall and counting lump coal rate used in coal mining research . [0002] technical background [0003] Lump coal refers to a coal block with a diameter of more than 30mm. The lump coal rate is an important indicator to measure the quality and value of coal products. The higher the lump coal rate, the better the coal quality and the higher the coal price. The rate is also conducive to reducing dust. With the development of my country's industrial technology, my country's coal mining has developed from gun mining and mechanized mining to comprehensive mining, intelligent mining, automation and mechanization. At the same time, it is difficult to directly count the lump coal rate of the working face, and it is impossible to make time...

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Problems solved by technology

[0006] Aiming at the above-mentioned problem that it is difficult to directly count the lump coal rate in the underground working face, the present invention provides a 2D simulated fully mechanized mining face roller cutting coal wall and counting the lump coal rate method with simple steps and good use effect

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