Elimination of Coal and Gas Outburst Dynamic Disasters in Dengfeng Coalfield through Gas Extraction Based on Extremely Thin Protective Coal Seam Mining

<div>Instruments used in the determination of coal seam gas parameters: (a) gas absorption experiment device; (b) 5E-MAG6600 full-automatic industrial analyzer; (c) WT-1 gas diffusion rate tester; (d) coal firmness coefficient tester.</div>

Advances in Civil Engineering

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Figure 3: Elimination of Coal and Gas Outburst Dynamic Disasters in Dengfeng Coalfield through Gas Extraction Based on Extremely Thin Protective Coal Seam Mining 

Figure 3 | Elimination of Coal and Gas Outburst Dynamic Disasters in Dengfeng Coalfield through Gas Extraction Based on Extremely Thin Protective Coal Seam Mining 