Quantitative Inversion of Water-Inrush Incidents in Mountain Tunnel beneath a Karst Pit

Table 8

Calculation results based on geometric models.

Basin number	6		7		8		9		10
Type	Cone	Truncated cone	Cone	Truncated cone	Cone	Truncated cone	Cone	Truncated cone	Cone	Truncated cone
Top radius of pit, R (m)	151.4	151.39	186.0	186.00	98.9	98.85	119.0	119.02	209.6	209.59
Bottom radius of pit, r (m)		2.00		15.0		1.0		50.0		15.0
Actual rainwater accumulation, Q (m³/d)	5979	5979	9004	9004	2545	2545	3697	3697	11450	11450
Height of pit, H (m)	35.1	35.13	37.0	37.0	21.5	21.5	25.0	25.0	21.5	21.4
tan θ	0.23	0.24	0.20	0.21	0.22	0.22	0.21	0.36	0.1	0.11
Depth of rainwater accumulation, h (m)	6.7	5.8	7.0	5.3	5.9	5.2	5.4	0.9	4.8	3.9