Effects of Water Immersion on the Long-Term Bearing Characteristics of Crushed Gangue in Goaf

Table 1

Physicomechanical parameters of rock.

Lithology	Density (g·cm^-3)	Tensile strength (MPa)	Uniaxial compressive strength (MPa)	Elastic modulus (GPa)	Cohesion (MPa)	Internal friction angle (°)
Mudstone	2.566	1.01	15.7	8.2	7.45	19.3
Sandy mudstone	2.594	4.25	67.8	15.6	19.30	34.2
Limestone	2.578	7.46	112.9	20.2	21.56	22.75
Sandstone	2.611	8.87	107.4	32.5	32.00	38.7