Research on the Identification of Precursor Information of Limestone Rockburst under Triaxial Unloading Conditions

Table 1

Mechanical parameters of limestone.

Rock type	Compressive strength/MPa	Tensile strength/MPa	Modulus of elasticity/GPa	Poisson’s ratio
Limestone	65.7	3.62	15.3	0.25
Limestone	57.1	3.25	15.7	0.23
Limestone	59.6	3.62	16.0	0.25

The parameters obtained from the three experiments were averaged to obtain uniaxial compressive strength of 60.8 MPa, tensile strength of 3.50 MPa, modulus of elasticity of 15.67 MPa, and Poisson’s ratio of 0.24 for the limestone.