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Coalbed methane (CBM) reservoirs in China are characterized by extremely low aperture and natural fractures density, which seriously affects the efficient CBM exploitation. In this paper, we have developed an experimental system for crushing coal by high-voltage electrical pulses (HVEP) to improve the pore structure. The coal samples collected were crushed under different breakdown voltages. It can...
An experimental system was developed to study the feasibility of crushing coal using high-voltage electrical pulses in an air environment to increase the permeability of coalbed methane (CBM) reservoir. Anthracite coal samples from Linhua and Guhanshan coal mine were chosen and analyzed in this study. It is indicated that the breakdown field strength of air is 18–18.3kV/cm, whereas these of the Linhua...
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