Coal cutting method with multiple demonstration knifes

Abstract

The invention discloses a coal cutting method with multiple demonstration knifes, which comprises: the step (1): a coal cutter carries out coal cutting for the coal mining working face with the first i demonstration knife, wherein, i=1, 2,...m, and the coal cutter adjusts the cutting position and cutting direction according to the top and the bottom of the coal mining working surface; step (2): if the coal cutting locus of the coal cutter does not contact the top or bottom of the coal mining working surface, the coal cutting track of the ith demonstration knife is obtained, and if the coal cutting track of the coal cutter contacts the top or bottom of the coal mining working surface, the step (1) is repeated; the step (3): the step (1) and the step (2) are repeated, and the coal cutting tracks of the i+1-n demonstration knife of the coal cutter are obtained, wherein the n>m; the step (4): the coal cutter uses the coal cutting tracks of the i-n demonstration knifes as a memory coal cutting cycle, and carries automatically circulated coal cutting on the coal mining working face. The method provided by the invention carries out memory coal cutting by multiple demonstration knifes, thereby effectively reducing the influence on memory coal cutting caused by single demonstration knife, and minimizing cutting of rocks at the coal mining working face bottom, improving the coal cutting effect, and improving the coal cutting stability.

Description

technical field [0001] The invention relates to a coal cutting method, in particular to a multi-demonstration knife memory coal cutting method. Background technique [0002] With the continuous improvement of the degree of mechanization of coal mining, coal mining machines are widely used in the coal mining process. The working environment of coal mining is complex and harsh, especially in the mining process of thin coal seam working faces. Shearer operation will greatly increase the labor intensity of operators. [0003] For this reason, in the existing coal mining process, the single demonstration knife memory coal cutting method is generally adopted to automatically cut and mine coal to the coal seam, so as to reduce the labor intensity of the operator. The so-called single demonstration knife memory coal cutting method means that the operator operates the shearer to cut a demonstration knife along the coal seam of the working face, and the shearer stores the parameters ...

AI Technical Summary

Problems solved by technology

[0004] However, when actually memorizing the coal cutting process, the position of the shearer drum must be constantly adjusted for each coal cut to ensure that the coal cutting effect meets the requirements, and the coal cutting operation process of the demonstration knife cannot be simply repeated.

The so-called "demonstration knife" does not exist in practice. The error that occurs when the operator adjusts the drum position of the demonstration knife will be repeated infinitely, which will affect the coal cutting effect.

For example, when the operator adjusts the demonstration knife, there is an error of 200mm downward on the roller at a certain position, and the height and angle of the demonstration knife will be repeated when the automatic memory cutting coal is cut to the same position, that is, the roller will also automatically repeat the demonstration knife direction. Adjust down by 200mm, so that the shearer will continue to cut and mine in the position where there is no coal seam. It can be seen that the single-knife memory coal cutting method will amplify the influence of the error of the demonstration knife, which seriously affects the continuous mining of the coal seam

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