Large Deformation Mechanics of Gob-Side Roadway and Its Controlling Methods in Deep Coal Mining: A Case Study

Table 1

Two-direction hydrofracturing parameters.

No.	Length of hole (m)	Diameter of hole (mm)	Elevation angle of hole (°)	Included angle between hole and roadway (°)	Hole spacing (m)	Fracturing time (min)	Fracturing interval (m)	Single-hole fracturing times
S	40.5	50	50	90	16	30	2-3	10–13
S′	40.5	50	50	3–5	8	30	2-3	10–13