Research Article
Effects of Borehole Arrangement on Methane Migration and Implications for High Efficiency Extraction in Intact and Tectonic Combined Coal Seams
Table 3
Comparison of the gas extraction amount between the traditional and optimal dislocation borehole arrangement.
| | Different borehole patterns | Gas amount at 100 d (kg/m3) | Gas amount at 200 d (kg/m3) | Gas amount at 300 d (kg/m3) | Time required for gas extraction of 2.50 kg/m3 (d) |
| | Traditional single-row borehole arrangement | 1.326 | 2.124 | 2.676 | 266 | | Optimal dislocation borehole arrangement | 2.013 | 2.971 | 3.526 | 145 |
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