Coal mine gob-side entry retaining side supporting method
A technology for coal mines and goafs, applied in mining equipment, earthwork drilling, shaft lining, etc., can solve problems such as difficulty in recovery of single columns, failure of single columns, material loss, etc., to shorten moving time and increase recovery rate , the effect of reducing difficulty
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[0020] The following implementations are used to illustrate the present invention, but not to limit the scope of the present invention.
[0021] see figure 1 -4, the present invention includes the following steps:
[0022] (1) Firstly, dense single hydraulic props 1 are adopted beside the gob-side retaining alley. The dense single hydraulic props include vertical single hydraulic props 11 and inclined single hydraulic props 12, and the gap between the inclined single hydraulic props 12 and the roof Connect with the hinged top beam 4 to make the single hydraulic prop contact with the roof of the roadway more smoothly;
[0023] (2) After the goaf is cut and the roof is directly collapsed, on the basis of the original support of 3 anchor rods, the roof of the gob-side retaining entry is started to be supported by 2 anchor cables. The retaining entry is supported by inclined double-row anchor cables. The spacing is 2m, the row spacing is 2.2m, the selected anchor cable length is...
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