Influence of Long Boreholes Layout and Drilling Length on Gas Drainage Based on Multifield Coupling Model of Gas-Bearing Coal

<div>Distribution of gas content in 90 m borehole with different drainage time: (a) gas content distribution on the monitoring line in the strike direction; (b) distribution of gas content in the trend direction monitoring line.</div>

Advances in Civil Engineering

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Figure 12

Figure 12: Influence of Long Boreholes Layout and Drilling Length on Gas Drainage Based on Multifield Coupling Model of Gas-Bearing Coal 