Study of the Roof Deformation Characteristics of Roadway Excavation Face and Unsupported Roof Distance

Table 3

Calculation parameters of example.

Example	Overburden load p0 (MPa)	Support load p1 (MPa)	Support load p2 (MPa)	Peak load p3′ (MPa)	The bulk density γm (kN/m^3)	Thickness hm (m)	The length L1 (m)	The length L2 (m)	The length L3 (m)	Elastic modulus E (GPa)
Example 1	2–8	2	0.5	5	24	2	3	2	2	10
Example 2	5	2–8	0.5	5	24	2	3	2	2	10
Example 3	5	2	0.2–0.8	5	24	2	3	2	2	10
Example 4	5	2	0.5	2–8	24	2	3	2	2	10
Example 5	5	2	0.5	5	18–30	2	3	2	2	10
Example 6	5	2	0.5	5	24	1.0–3.5	3	2	2	10
Example 7	5	2	0.5	5	24	2	1.5–4.5	2	2	10
Example 8	5	2	0.5	5	24	2	3	0.5–3.5	2	10
Example 9	5	2	0.5	5	24	2	3	2	0.5–3.5	10
Example 10	5	2	0.5	5	24	2	3	2	2	7–13
Sensitivity	Sensitivity	Sensitivity	Insensitivity	Insensitivity	Insensitivity	Sensitivity	Sensitivity	Sensitivity	Sensitivity	Sensitivity