Analytical Solution of a Circular Opening considering Nonuniform Pressure and Its Engineering Application

Table 3

Summary of cases on fracture and support scheme of opening under nonuniform pressure.

Site	Buried depth (m)	In situ stress state	Deformation features	Support schemes	Support effects
No. 1 coal mine [13]	930	λ = 1.2	Roof (floor) > side	Deep hole grouting + shallow hole grouting + whole section high-strength bolt (rope) support	Stable
No. 2 coal mine [12]	535	λ = 0.3.	Roof (floor) < side	Shallow hole grouting + high-strength bolt (rope) support	Stable
No. 3 coal mine [16]	640	λ = 1.5	Roof (floor) > side	Grouting + cable anchor + flexible truss yield support	Stable
No. 4 coal mine [38]	860	λ = 1.36	Roof (floor) > side	Cable anchor + concrete lining + steel pipe arch support	Stable