Numerical Investigation of Relationship between Bursting Proneness and Mechanical Parameters of Coal

Table 7

Values of standard deviation of the eight probability distributions under eight cohesion scatter intervals.

Distribution	Cohesion intervals (MPa)
	0.82–8.82	1.32–8.32	1.82–7.82	2.32–7.32	2.82–6.82	3.32–6.32	3.82–5.82	4.32–5.32
Weibull	2.78	2.39	2.02	1.66	1.31	0.98	0.64	0.32
Normal	2.79	2.41	2.05	1.69	1.34	0.99	0.66	0.33
Rayleigh	2.57	2.24	1.91	1.58	1.26	0.94	0.62	0.31
Chi-square	2.64	2.32	2.00	1.66	1.33	0.99	0.66	0.33
Student’s	2.77	2.41	2.06	1.70	1.35	1.00	0.66	0.33
Exponent	2.27	2.02	1.75	1.47	1.19	0.89	0.60	0.30
Cauchy	2.56	2.33	2.03	1.70	1.35	1.01	0.67	0.33
Fisher	2.38	2.18	1.91	1.62	1.31	0.99	0.66	0.33