Experimental Investigations on Rheological Properties of Mudstone in Kilometer-Deep Mine

Table 5

Triaxial test results for mudstone.

Specimen number	Confining pressure (MPa)	Compressive strength (MPa)	Elastic modulus (GPa)	Cohesion (MPa)	Internal friction angle (°)
A1	5	68.27	17.70	16.5	42.9
A2	10	90.40	21.56
A3	15	106.41	24.79
A4	20	128.43	29.48