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

Table 5

Calculation parameters for the width variation of fault fracture zone.

Parameter	Value
Water pressure (MPa)	2.4
Side pressure coefficient	1.5
Tunnel depth (m)	650
Width of fault fracture zone (m)	10
	15
	20