Mechanism of Fire Prevention with Liquid Carbon Dioxide and Application of Long-Distance Pressure-Holding Transportation Technology Based on Shallow Buried and Near-Horizontal Goaf Geological Conditions

Figure 18

Variation in time of gaseous O₂ and CO₂ concentration upon tests of direct injection of CO₂ in real field. Figures from top to bottom refer to four different observation points, named 29#, 30#, 31#, and 32#.

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