Research on and design of a self-propelled nozzle for the tree-type drilling technique in underground coal mines

HIGHLIGHTS

• who: Yiyu Lu and collaborators from the State Key Laboratory of Mine Disaster Dynamics and Control, Chongqing University, Chongqing University, Chongqing, China have published the Article: Research on and Design of a Self-Propelled Nozzle for the Tree-Type Drilling Technique in Underground Coal Mines, in the Journal: Energies 2015, 8, 14260-14271 of /2015/
• how: To expand the volume of coal from which the gas can be extracted using a single borehole and improve gas drainage efficiency this paper proposes a new technique for gas drainage by using tree-type boreholes in coal seams . . .
  

   

  

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