A coal caving method with segmental staggered cutting and circular coal caving in top coal caving working face

Abstract

The invention discloses a sectional staggered cutting circulatory caving method of caving mining face and belongs to the technical field of a fully-mechanized coal mining and caving method of coal mine. The mining face is equally divided into an upper half section and a lower half section; a coal cutter feeds cutting slantly from the end of the upper half section; after cutting of the i-1 cutting,caving is conducted on the upper half section of the i-1 cutting and the i-2 cutting; a coal cutter feeds cutting slantly from the end of the lower half section; after cutting of the i cutting, caving is conducted on the lower half section of the i cutting and the i-1 cutting; cycle operation is followed, the cutting number of the upper and lower half sections is always 2 cuts more than the number of the last cutting until the end of coal mining, wherein i=4,5,...,n; and by the sectional cutting, the cutting and caving will not affect each other. Thereby, the problem that mining and caving cannot be carried out simultaneously is solved, the time of waiting for caving is shortened, and the coal mining efficiency is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of fully mechanized coal mining methods in coal mines, and in particular relates to a method for long-distance fully mechanized caving working faces by adopting segmental interlaced cutting and circular coal discharging on the working face. Background technique [0002] For the traditional fully-mechanized caving face, it is usually the method that the shearer cuts two or three cuts, stops and waits, and then puts coal in sequence. However, the traditional top-coal caving process faces many problems. For example, the coal caving time is 2-3 times the coal cutting time, and parallel mining and caving operations cannot be realized, which greatly inhibits the efficiency of the working face. [0003] At present, in order to improve the efficiency of the fully mechanized caving face, more efficient low-level top-coal caving hydraulic supports are usually used, which have achieved better economic benefits compared...

AI Technical Summary

Problems solved by technology

[0007] The present invention overcomes the deficiencies of the prior art, and aims to provide a method for segmented, interlaced, and circular coal caving in the top-coal caving face, which effectively solves the problem that the fully-mechanized caving face cannot realize parallel operation of mining and caving, and is difficult to meet the needs of large mines. Coal cutting output and working face efficiency are low

Images