Case Study on the Mechanism of Influence of Stoppage on Ground Pressure under Different Rates of Advance

Table 5

Roof pressure characteristics at different rates of advances.

Advance speed (m/d)	Abutment pressure peak value (MPa)			Peak stress concentration factor
	Survey line 1	Survey line 2	Survey line 3	Survey line 1	Survey line 2	Survey line 3
5	8.48	11.6	10.2	1.37	1.87	1.65
10	8.28	11.2	9.99	1.34	1.81	1.61
15	8.14	11.0	9.77	1.31	1.77	1.58
20	8.14	10.9	9.03	1.31	1.76	1.45