Method for supporting triangular area in coal mine support-dismantling process
A technology for triangular area and coal mine, which is applied in the direction of supporting the roof beam of mine roof, mining equipment, earthwork drilling, etc. The effect of touching hands and feet
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[0012] Such as image 3 , 4 As shown in the diagram, a support method for the triangular area of a coal mine is provided. Three shielding frames 4, 5, and 7 are set in the triangular area, and after each frame 1 is withdrawn, two canopies are erected at the original frame position vertically in the direction of the shielding frames 9 The 9 beams of the canopy are about 750±50mm away from the top beam of the next support to be removed, and the distance between the 9 beams of the two canopies is 750±50mm, which is supported by three columns (each canopy beam is cut from the side beam end of the old pond to the support to be removed) The top line is basically flush, supported by two single columns with a column distance of 400-800mm at the same time, and the other side is supported by a single column 1-1.5m away from the end of the beam, and at the same time, it must be ensured that this end can be covered in the middle The length on the front beam of the frame is not less tha...
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