Table 3 Linear compression and flexural... | Emerald Publishing

Table 3

Linear compression and flexural strength model (Equation 8) parameters for the gypsum rock

	Model parameters	k	a	b	c	Number of data	RMSE	R ²
Equation 5	p	2·1	−0·003	−0·007	−0·41	12	0·081	0·88
	q	−12·9	0·14	0·013	−0·27	13	0·079	0·87
	σ _c: MPa	81·7	−0·73	−0·11	−11·5	12	0·311	0·96
	ϵ _c: %	2·22	−0·017	−0·003	−0·35	11	0·018	0·89
	E _i: MPa	42 974	−398	−57	−4684	13	230	0·95
Equation 6	σ _c: MPa	109	−1·0	−0·13	−13·2	12	0·380	0·94
	ϵ _c: %	1·76	−0·012	−0·002	−0·36	11	0·020	0·88
	β	22·5	−0·20	−0·02	−2·26	12	0·060	0·97

	Model parameters	k	a	b	c	Number of data	RMSE	R ²
Equation 5	p	2·1	−0·003	−0·007	−0·41	12	0·081	0·88
	q	−12·9	0·14	0·013	−0·27	13	0·079	0·87
	σ _c: MPa	81·7	−0·73	−0·11	−11·5	12	0·311	0·96
	ϵ _c: %	2·22	−0·017	−0·003	−0·35	11	0·018	0·89
	E _i: MPa	42 974	−398	−57	−4684	13	230	0·95
Equation 6	σ _c: MPa	109	−1·0	−0·13	−13·2	12	0·380	0·94
	ϵ _c: %	1·76	−0·012	−0·002	−0·36	11	0·020	0·88
	β	22·5	−0·20	−0·02	−2·26	12	0·060	0·97