Study on Lateral Deformation and Failure Characteristics of Coal Based on Different Confining Pressures

Table 1

Physical and mechanical parameters of coal samples under different confining pressures.

Number	Loading rate (mm/min)	Diameter (mm)	Height (mm)	Confining pressure (MPa)	Peak strength (MPa)	Peak lateral strain, 10^–2	Peak axial strain, 10^–2	Maximum lateral strain, 10^–2	Maximum axial strain, 10^–2
M1	0.05	49.28	98.32	0	12.80	0.7667	0.5351	2.0611	0.997
M2	0.05	49.42	98.89	3	43.95	0.6984	1.2775	1.6062	2.0216
M3	0.05	49.3	100.18	5	53.36	0.852	1.2412	2.6946	2.1174
M4	0.05	49.34	100.11	7	67.43	1.0649	1.8067	2.1468	2.3674