Analysis of Influence Law of Burial Depth on Surrounding Rock Deformation of Roadway

Table 5

Limiting strength and buried depth of rock.

Lithology	Siltstone	Mudstone	Fine sandstone	Sandy stone
Buried depth of limiting strength (m)	500∼600	300∼400	400∼500	400∼500
Cohesion range (MPa)	11.5∼12.5	6∼7	9∼10	7∼8