Study on Occurrence Mechanism of Coal Pillar in L-Shaped Zone during Fully Mechanized Mining Period and Prevention Technology

Table 5

Mechanical parameters of strain-softening model.

Strain	Cohesion (MPa)	Friction angle (°)	Dilation angle (°)
0	1.3	23	0
0.1	1.3	23	0
0.12	1.0	18	5
0.15	0.7	16	8
0.2	0.6	15	8
1	0.6	15	10