Goaf Gas Control Improvement by Optimizing the Adjacent Roadway Large-Diameter Boreholes

Table 5

Distribution of spontaneous combustion zone in goaf with different extraction rates (y = 10 m).

Extraction rate (m·s^−1)	Inlet side (m)	Middle part (m)	Air-return side (m)
2	64–87	69–93	12–23
4	66–89	72–96	15–27