The basic distribution pattern of horizontal stress on the roof for gob-side entry retaining is that it first shows an increasing trend and then shows a step-down trend.
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Research on the support of roadways with different roof cutting angles in gob-side entry retaining.
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The sentences
The vertical stress of the collapsed gangue self-forming gangue rib shows an increasing trend first, and after reaching the peak, it shows a decreasing trend, and then it grows slowly until it finally tends to equilibrium.