Table 2 Simulation scheme.

From: Study on the anchorage mechanism and roof stability control technology of bolts in fractured or weak surrounding rock

Anchoring method

End anchorage

Extended anchoring

Full-length anchorage

Anchoring section

Section Number/Section

10–12

5–12

2–12

Length/m

0.6

1.6

2.2

Free end

Section Number/Section

1–9

1 ~ 4

1

Length/m

1.8

0.8

0.2

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