[Retracted] A Performance of a Nanofiber Polymer in Geotechnical Engineering Support

Table 1

Physical and mechanical parameters of roof and floor.

Rock formation name	Shear modulus; G/GPa	Tensile strength; k/MPa	Bulk modulus; V/GPa	Density; d/N·m^3	Adhesion; c/MPa	Friction angle; f/°
Laodi	1.78	3.6	2.19	2380	5.45	39.9
Direct bottom	2.12	3.l	2.42	2510	5.51	38.4
Coal seam	0.81	1.6	1.48	1340	2.53	36.4
Direct top	2.2	2.6	2.41	2490	5.57	38.3
Basic top	3.6	3.2	4.1	2520	6.29	39