Ultra-thin coal seam longwall mining method based on N00 construction method

Abstract

The invention provides an ultra-thin coal seam longwall mining method based on an N000 construction method, and relates to the technical field of mining. The ultra-thin coal seam longwall mining method includes the steps that advancing operation is performed on a working face in the direction perpendicular to the working face to form a first roadway, and the first roadway is supported to form a first gate road; an advance working area is formed in the first gate road; coal mining machines are adopted to simultaneously mine coal in the advance working area in the direction parallel to the working surface towards both sides of the first gate road, and a mined coal body is transported to a scraper conveyor; when the coal mining machine located on one side of the first gate road runs to a first preset position, the working face is blasted to form a second roadway, and the second roadway is supported to form a second gate road; and when the coal mining machine located on the other side of the first gate road runs to a second preset position, the working face is blasted to form a third roadway, and the third roadway is supported to form a third gate road. According to the ultra-thin coalseam longwall mining method based on the N000 construction method, roadway tunneling in advance can be avoided, the coal mining cost is reduced, the coal mining efficiency is improved, and the wasteof resources is avoided.

Description

technical field [0001] The present disclosure relates to the technical field of mining, in particular, to a longwall mining method of an extremely thin coal seam based on the N00 method. Background technique [0002] As one of the main energy sources, coal is widely used in daily life and industrial production. With the development of science and technology, people's demand for coal resources is increasing, and efficient mining of coal resources is particularly important. [0003] Ultra-thin coal seam is a common form of coal seam distribution. Usually, the ultra-thin coal seam is mined by using the high-grade general mining face extraction technology. Before mining, it is necessary to excavate multiple roadways in advance, and leave The roadway is supported by columns. And in order to ensure that the coal seam in the extremely thin coal seam is fully exposed, the roadways excavated in the extremely thin coal seam are semi-coal rock roadways, which are difficult to excavat...

AI Technical Summary

Problems solved by technology

And in order to ensure that the coal seam in the extremely thin coal seam is fully exposed, the roadways excavated in the extremely thin coal seam are semi-coal rock roadways, which are difficult to excavate, take a long time to excavate, and have low coal mining efficiency and high cost; at the same time, coal Columns are left in the roadway and cannot be recycled, resulting in waste of coal resources

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