Table 5 CO distribution in the tunnel stable region in Condition 1 (x > L).

From: Study of harmful gas migration law and influencing factors after tunnel blasting in high-altitude tunnels under push ventilation conditions

Time

Distribution function(t ≤ t0)

Time

Distribution function(t > t0)

100

− 1.24E−04x2 + 0.04358x − 4.03134

350

0.0262x − 8.5200

140

− 1.07E−04x2 + 0.04313x − 4.85815

450

0.0278x − 11.0727

180

− 8.19E−05x2 + 0.03112x − 4.94126

550

0.0285x − 13.3639

220

− 7.51E−05x2 + 0.04061x − 6.30209

650

0.0294x − 15.7043

260

− 7.93E−05x2 + 0.04463x − 7.42041

750

0.0303x − 18.1517

300

− 5.49E−05x2 + 0.04089x − 8.21692

  

340

− 2.98E−05x2 + 0.03579x − 8.92313

  
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