A support method for gob-side entry retaining in blast mining working face with small area and thin coal seam
A small-area working face technology, applied in mining equipment, earthwork drilling, shaft equipment, etc., can solve problems such as scientific support methods and hidden safety hazards in blast mining working faces without small-area thin coal seams, so as to prevent spontaneous combustion And harmful gas enters the working face, maintains stability, and is easy to operate
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[0036] combined with Figures 1 to 3 The specific embodiment of the present invention is described further:
[0037] The scheme design of the pulling working face is as follows: figure 1 shown.
[0038] Support schemes such as figure 2 image 3 As shown, the process is: supplementary bolting 20m ahead of the working face, the row spacing is 1.0m, four bolts in each row, and the bolt specification is Φ22×2000mm; the method of advancing the coal wall is used to erect the shed, and the I-shaped steel shed The coal wall distance of the advanced working face shall not exceed 4m.
[0039] Before the shed is advanced, the gangue on the floor of the shed area is cleaned manually with a pick, and the cleaned gangue is manually transferred to the original belt conveyor transportation system to be transported to the ground. Safety. Before installing the beam, first check the section width of the roadway according to the center line, and measure the height of the roadway. If it doe...
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