Mechanical Analysis of Mining Stress Transfer on Isolated Island Face in Extra-Thick Fully Mechanized Top-Coal Caving Mining

Table 3

Stress–strain relationship of the goaf medium in the double-yield model.

Strain	Stress (MPa)	Strain	Stress (MPa)	Strain	Stress (MPa)
0.01	0.003	0.19	0.103	0.37	0.452
0.04	0.015	0.22	0.131	0.40	0.620
0.07	0.028	0.25	0.166	0.43	0.910
0.1	0.042	0.28	0.210	0.46	1.533
0.13	0.059	0.31	0.267	0.49	3.842
0.16	0.079	0.34	0.343	0.50	7.122