Table 3 Peak characteristics of advance abutment pressure.

From: Study on migration instability characteristics and mine pressure control of roof overburden rock in thin coal seams mining

Face advanced distance /cm

Abutment pressure peak /N

Stress concentration factor

Distance between peak point and working face/cm

Peak influence range /cm

55

275.1

2.75

8

53

88

352.8

3.53

11

53

115

443.0

4.43

8

53

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