The Airflow Reversal Law in Ventilation System after Coal and Gas Outburst in Tunneling Roadway

Figure 4

Cloud charts of ventilation parameters under different outburst pressures in heading roadway. (a) 0.1001 MPa. (b) 0.1005 MPa. (c) 0.101 MPa. (d) 0.105 MPa. (e) 0.11 MPa. (f) 0.15 MPa. (g) 0.2 MPa. (h) 0.5 MPa. (i) 0.74 MPa. (j) 1 MPa. (k) 5 MPa.

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