Big inclination high seam coal face first caving cloth pore structure
The utility model discloses a big inclination high seam coal face first caving cloth pore structure, set up the big gun hole on transportation roadway, it is old apical pore down in proper order, lower triangular space lumpiness hole, lower end via hole and lower end hole, old apical pore is 14 with...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The utility model discloses a big inclination high seam coal face first caving cloth pore structure, set up the big gun hole on transportation roadway, it is old apical pore down in proper order, lower triangular space lumpiness hole, lower end via hole and lower end hole, old apical pore is 14 with inclined coal seam's contained angle down, lower old apical pore, lower triangular space lumpiness hole, contained angle between the adjacent hole with the lower end hole of lower end via hole is 18 respectively, 25, with 28, set up the big gun hole on the return air lane, it is old apical pore in proper order, go up triangular space lumpiness hole, upper end via hole and upper end hole, the contained angle of wherein going up old apical pore and inclined coal seam is 32, go up old apical pore, go up triangular space lumpiness hole, contained angle between the adjacent hole with the upper end hole of upper end via hole is 28 respectively, 14 with 13. The utility model discloses it is rational in infrastructure, we |
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