Onsite Tests and Numerical Simulation of Broken Rock Zones in Surrounding Rocks of Seepage Roadways under Blasting

Table 1

Mechanical parameters of the calculation model for the seepage tunnel.

Homogeneous degree (m)	Average elastic modulus (MPa)	Friction angle (°)	Average compressive strength (MPa)	Poisson ratio
3	90000	37	200	0.25
Permeability coefficient (m d^-1)	Porosity	Pore pressure coefficient	Injury mutation coefficient	Coupling coefficient
The upper 1, the lower 0.001	The upper 0.3, the lower 0.1	1	5	0.1