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

Table 4

Calculation parameters for side pressure coefficient variation.

Parameter	Value
Water pressure (MPa)	2.4
Width of fault fracture zone (m)	10
Tunnel depth (m)	650
Side pressure coefficient	1.25
	1.5
	1.75