Study on Deformation Response Law of Surrounding Rock in Solid Backfill Mining Stope

Table 2

Advanced stress concentration characteristics of working face.

Working face advancing length (m)	Backfill length of goaf (m)	Vertical stress of working face (MPa)	Vertical stress at 5 m position in front of working face (MPa)	Vertical stress at 10 m position in front of working face (MPa)	Vertical stress at 15 m position in front of working face (MPa)
10	0	3–4	6–7	9–10	9–10
30	20	3–4	6–7	7–8	7–8
60	50	2–3	5–6	8–9	9–10
80	70	4–5	6–7	9–10	—