Simulation of the Uniaxial Mechanical Properties and Crack Evolution of Coal Pillar-Artificial Dam in Abandoned Mines

Table 5

Crack evolution of coal pillar-artificial dam.

Group	Initiation stress (MPa)	Damage stress (MPa)	(%)	(%)
Dam	13.48	34.12	39.27	99.40
Coal	2.11	5.31	39.06	98.29
50°	9.19	32.38	27.97	98.56
60°	9.35	33.10	27.94	98.92
70°	10.86	33.22	32.22	98.55
80°	10.31	32.65	31.38	99.39
90°	9.50	31.83	29.50	98.86