Critical Conditions and Energy Transfer Characteristics of the Failure Process of Coal-Rock Combination Systems in Deep Mines

Table 2

The critical equilibrium values for the failure of the two types of coal–rock combination sample structures with different lithologies and different height ratios.

Set A			Difference	Set B			Difference
A11	153.490	156.324	-2.834	B11	200.054	200.525	-0.471
A12	153.581	156.110	-2.529	B12	209.201	209. 669	-0.468
A13	157.802	159.573	-1.771	B13	206.072	206.508	-0.436
A21	180.778	181.845	-1.067	B21	244.145	244.436	-0.291
A22	175.587	176.664	-1.077	B22	241.743	241.945	-0.202
A23	178.998	180.079	-1.081	B23	245.242	245.455	-0.213
A31	197.935	198.566	-0.631	B31	301.323	301.446	-0.123
A32	195.588	196.289	-0.701	B32	305.901	306.083	-0.182
A33	196.145	196.799	-0.654	B33	304.851	304.983	-0.132