Dual-system two-hardness short-wall coal seam mining method

Abstract

The invention relates to a dual-system two-hardness short-wall coal seam mining method. A coal miner suitable for hard coal seam small working face (short wall) is combined for solving the cutting problem of hard coal seams; then by researching a short-wall matching technology, a mining technology of short-wall fully-mechanized coal mining and direct cut feeding is formed; a hard ejection plate control method is matched, so that the short-wall efficient mining is realized; the mining speed of the short-wall working face is accelerated; the coal recovery ratio is improved, and the dual-system two-hardness short-wall coal mining method has important significance to the normal sustainable development of mine.

Description

technical field [0001] The invention relates to a coal seam mining method, in particular to a fully mechanized mining method with two systems and two hard short walls. Background technique [0002] Due to the vigorous implementation of high-yield and high-efficiency comprehensive mechanized mining for many years, and the layout of the working face is based on increasing the length of the working face and the mineable length, the amount of remaining coal at the corners has increased; The serious damage to the coal seam also increases the number of corner coal seams and small working faces. Many existing mines have entered the final stage of mining, so it is imperative to rely on fine mining to improve the recovery rate of mine resources and increase the mining workload of the remaining corner coal seams. At the same time, there are huge coal reserves under buildings and railways, and these resources should be rationally developed and utilized. However, the existing mining e...

AI Technical Summary

Problems solved by technology

However, the existing mining equipment and technical means of the small working face and the remaining corner coal seams are relatively backward, which not only leads to low coal production, low production efficiency, and poor safety conditions

At the same time, due to the slow mining speed of the working face, it seriously affects the mining succession of the underlying coal seam, which restricts the normal production of the mine and the improvement of resource recovery rate.

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