An investigation of the key factors influencing methane recovery by surface boreholes

作者：Liu, Y K^*; Zhou, F B; Liu, L; Hu, S Y

来源：Journal of Mining Science, 2012, 48(2): 286-297.

DOI：10.1134/S1062739148020098

• surface borehole
• volumetric flow of methane under standard state
• permeability coefficient
• distance from working face to venthole
• key factors

The paper deals with key factors influencing surface borehole gas drainage. Herein, the surface borehole drilled through the overburden of gobs, which was commonly operated in China, has been investigated. By building a mathematical model, the literature probed into the issue that how such factors as permeability coefficient and pressure of coal seams affected the flow of pure methane under standard conditions. The results indicated that a key factor was the distance between mining face and borehole (reflecting the gas permeability coefficients of overlying coal seams and gobs). The data measured from surface gas drainage practice at Wulan Coal Mine verified the conclusions of the theoretical research.

• 出版日期2012-3
• 单位中国矿业大学（北京）