“Relief-Retaining” Control Technology of Floor Heave in Mining Roadway with Soft Rock: A Case Study

Table 1

Numerical simulation scheme for control scheme of floor heave.

Control technologies and parameters		Scheme 1	Scheme 2	Scheme 3
Pressure relief grooves	Depth (m)	2.0	2.0	2.0
	Width (m)	0.4	0.6	0.8
Retaining piles	Depth (m)	3.0	3.0	3.0
	Spacing (m)	0.5	1.0	1.5
Large-diameter pressure relief boreholes	Depth (m)	10	10	10
	Spacing (m)	0.8	1.0	1.2