Numerical and Similarity Simulation Study on the Protection Effect of Composite Protective Layer Mining with Gently Inclined Thick Coal Seam

<div>Variation law of extraction parameters of the main drainage pipe in 3307B bottom drainage roadway. (a) Gas concentration; (b) gas content.</div>

Shock and Vibration

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Figure 14

Figure 14: Numerical and Similarity Simulation Study on the Protection Effect of Composite Protective Layer Mining with Gently Inclined Thick Coal Seam 

Figure 14 | Numerical and Similarity Simulation Study on the Protection Effect of Composite Protective Layer Mining with Gently Inclined Thick Coal Seam 