Longwall Mining Method of Ultra-thin Coal Seam Based on n00 Construction Method

Abstract

The present disclosure provides an extremely thin coal seam longwall mining method based on the N00 method, and relates to the technical field of mining. The mining method comprises the following steps: performing an advanced operation on a working face along a direction perpendicular to the working face to form a first roadway, supporting the first roadway to form a first trough; forming an advanced working area in the first trough; and using a shearer In the advanced working area, the coal is mined simultaneously on both sides of the first trough along the direction parallel to the working face, and the mined coal is transported to the scraper conveyor; the shearer on one side of the first trough runs When reaching the first preset position, the working face is blasted to form a second roadway, and the second roadway is supported to form a second trough; the shearer on the other side of the first trough runs to the second preset position. When in position, blast the working face to form the third roadway, and support the third roadway to form the third trough. The mining method of the present disclosure can avoid excavating the roadway in advance, reduce the cost of coal mining, improve the efficiency of coal mining, and avoid waste of resources.

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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