Deformation Mechanism of the Coal ahead of Fully Mechanized Caving Face under High-Intensity Mining Condition

Table 1

Mechanical property parameters of coal’s fracture structure.

Main fractures	Normal stiffness Kn/MPa	Tangential stiffness Ks/MPa	Main fractures distribution
			Angles (°)	Widths (cm)
Fracture 1	3800	1200	71	0.15
Fracture 2	3800	1200	84	0.04