Study on the Safety Thickness of Rock Strata for Outburst Prevention in Deep Tunnel Based on Numerical Modeling and Backpropagation Neural Network

Table 3

Calculation parameters for water pressure variation.

Parameter	Value
Side pressure coefficient	1.5
Width of fault fracture zone (m)	10
Tunnel depth (m)	650
Water pressure (MPa)	1.2
	2.4
	3.6