Experimental Study on Mudstone’s Strength Characteristics in Deep-Buried Coal-Measure Formation: A Case Study of Permian Longtan Formation

Table 3

Specimens parameters and UCS test results.

Specimen no.	Length (mm)	Diameter (mm)	Weight (g)	Density (kg/m^3)	Load at failure (kN)	UCS (MPa)	UCS2 (MPa)
617	53.08	48.55	253.8	2583	58.82	31.77	28.90
621	80.90	48.89	413.6	2724	95.84	51.05	49.81
622	99.42	48.63	480.4	2602	99.74	53.70	53.84
623	80.43	48.49	417.0	2808	61.54	33.32	32.52
624	86.30	48.47	430.0	2700	82.58	44.75	44.10
625	68.36	48.73	370.4	2905	110.52	59.26	56.38
Mean value				2720	84.84	45.64	44.26