Method for measuring coal fracturing range based on voltage and current oscillogram

The invention discloses a method for measuring a coal fracturing range based on a voltage and current oscillogram, and is suitable for the technical field of plasmas. The method comprises the steps of discharging a coal seam; acquiring related electric signal parameters according to the voltage and current waveforms; dividing coal seam discharge into a first-time discharge condition and a non-first-time discharge condition to judge electric signal parameters, if the electric signal parameters all meet a limit value requirement, regarding the coal seam as successful breakdown, otherwise, regarding the coal seam as non-breakdown; and outputting a breakdown result, continuously discharging the coal seam, repeating the steps, and ending discharging of the coal seam when the number of successful breakdown times of the coal seam reaches a certain value and the relevant electric signal parameter value is stable. According to the method, whether the coal seam in the discharge area is successfully punctured or not is