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

Table 6

Concentration characteristics of stoppage pressure at different rates of advance: line 1.

Advance speed (m/d)	Abutment pressure peak value (MPa)			Amount of abutment pressure increase (MPa)			Rate of increase (%)
	Stop mining for 1 day	Stop mining for 2 days	Stop mining for 3 days	Stop mining for 1 day	Stop mining for 2 days	Stop mining for 3 days	Stop mining for 1 day	Stop mining for 2 days	Stop mining for 3 days
5	8.67	8.72	8.73	0.19	0.24	0.25	2.24	2.83	2.95
10	8.62	8.71	8.73	0.34	0.43	0.45	4.11	5.19	5.43
15	8.58	8.70	8.73	0.44	0.56	0.59	5.41	6.87	7.25
20	8.69	8.72	8.73	0.55	0.58	0.59	6.76	7.12	7.25