Mechanism and Control of Water–Rock Coupling-Induced Disaster when Mining below the Unconsolidated Confined Aquifer

Table 6

Influence of the strength enhancement factor on the overlying strata structure stability.

Strength enhancement factor	Overlying load (MPa)		Displacement (mm)		Fracture height (m)
	Key strata	Lower water-resisting	Key strata	Lower water-resisting
1.0	5.41	4.47	3968.00	3877.00	55.00
1.2	5.42	4.40	3963.00	3879.00	55.00
1.5	0.87	4.42	207.70	112.20	53.88
2.0	0.71	5.89	120.10	42.75	39.25