Prediction Model of Failure Zone in Roadway Sidewall considering the Lithologic Effect of Rock Formation

Table 3

The width of limit equilibrium zone under different support styles.

Support form	Calculation results by our model/m			Hou and Ma [29]	Liu et al [30]	Measured; results
	α	β=0.7	β=0.8
Unsupported	1.5	6.78	6.57	6. 23	4. 836. 41	No results
	2	6.45	6.29
	2.5	6.22	6.08
	3	6.06	5.93
Annular support	1.5	4.33	4.18	3. 78	2. 513. 92	3
	2	4.08	3.95
	2.5	3.90	3.79
	3	3.75	3.68
Arched support	1.5	5.54	5.36	4. 95	3. 525. 01	4 5
	2	5.26	5.10
	2.5	5.04	4.91
	3	4.89	4.78