In order to improve the production efficiency of coal-bed methane with low permeability

we proposed the CBM fracturing and recovery technique with pulsed discharge in water

studied the mechanism of high-voltage electrical pulse discharge in water and the fracture mechanism of coal fractures

and calculated the numerical simulation of energy by RFPA-Dynamic. The results showed that under the same hydrostatic pressure

and with the increase of discharge energy

the fissures increased

the fissure length got longer

the width got wider

and the fissure density around the borehole got larger. The tip stress of the fissure increased with the loading time and the discharge energy

so that the fissures expanded more easily. The research results could provide certain theoretical basis for the exploitation of CBM.