Calcined petroleum coke with high conductivity for grounding engineering and preparation method thereof

The invention discloses calcined petroleum coke with high conductivity for grounding engineering and a preparation method thereof. The calcined petroleum coke is prepared from the following raw materials: 15-25WT% of superconducting carbon powder with the resistivity ranging from 1.2*10[Omega].m to 1.4*10[Omega].m, 75-85WT% of 100-150 mesh calcined petroleum coke and 0.05-0.1WT% of nano-nickel powder. The preparation method comprises the steps of taking a certain amount of 100-150 mesh calcined petroleum coke as an anode, taking stainless steel as an anode current collector, soaking in an H2SO4 aqueous solution of certain concentration by adopting a doping modification method, taking a lead plate as a cathode, carrying out electrolysis by using constant current, and performing conductivity modification on produced expansible graphite so as to obtain the calcined petroleum coke. The scheme of the invention is applicable to novel grounding engineering resistance reduction and soil moisture preservation