Small mine-mining area division, mining sequence and mining area roadway layout

1 mining area should be based on a strike length of geological structure of Ida, coal seam occurrence conditions, mining mechanization level, the connection relation mining area reserves, production capacity of mining area, mining area and roadway maintenance and other factors to determine.

2 When there is a fault or fold structure in the minefield that has a great influence on the layout of the mining roadway and the mining of the working face, the fault and the pleated crankshaft should be used as the natural boundary of the mining area.

3 There are many small faults in the mine field. When the mining area cannot be avoided, the working face mining direction should be avoided and the fault direction should be inclined at a small angle.

4 The central mining area should be prioritized when conditions permit. When the conditions are suitable, it can be arranged in the inclined well of the disc.

The number of mining areas and working faces produced simultaneously in the mine shall be determined according to the geological conditions of the mining area, the coal seam production capacity, and the degree of mechanization of mining. The mining area and working face produced by the mine should not exceed two, and the mine with conditions should be concentrated on one well.

The mining sequence of the mining area shall be forward-type mining that is extended from the front to the back and gradually extended to the boundary of the well.

The order of coal seam mining shall be determined according to factors such as coal seam occurrence conditions and mining technical conditions, and shall meet the following requirements:

1 For the mining sequence of close-distance coal seams, the downstream mining of the upper and lower mining layers should be carried out first;

2 The distance between the layers of coal seam is large. The mining of the lower coal seam does not affect the integrity of the upper coal seam. When the lower layer is technically and economically reasonable, the upper mining of the lower layer and the upper layer of the upper mining layer may also be adopted.

When mining coal and gas outburst coal seams, the protective layer should be first mined.

When the coal seam occurrence conditions and mining technical conditions are appropriate, the upper and lower mountains of the mining area should be arranged in the coal seam.

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