Microscopic mechanism for enhanced coal bed methane recovery and outburst elimination by hydraulic slotting: A case study in Yangliu mine, China

摘要: Coal bed methane (CBM) is a clean, efficient, and environmentally friendly energy, its efficient exploitation can meet the growing demand for energy worldwide. Besides, (CH4) greenhouse gas (GHG) 25–72 times more powerful than carbon dioxide (CO2) in inducing global warming. With regard to mining industry, CBM regarded as major hazard resource, inadequate management or control may lead serious coalmine accidents. In China, drainage main measure adopted resolve this problem. However, because coal seams China are characterized by low permeability, it difficult drain contained mass. Therefore, measures must be taken reconstruct reservoir enhance seam permeability. hydraulic slotting has been widely accepted applied mine engineering owing permeability-enhancement effect. work, based on our previous research, we systematically elaborate mechanisms of permeability enhancement elimination outburst from microscopic perspectives. To examine rationality practicability research results effect slotting, field experiment was conducted monitoring were analyzed. Our show that flow rate concentration slotted boreholes significantly higher those conventional boreholes. addition, time required borehole eliminate 72.41% less needed borehole. The practice Yangliu could extended other mines with similar conditions. © 2016 Society Chemical Industry John Wiley & Sons, Ltd