has participant well stimulation hydraulic fracturing 2020-06-02T13:54:58Z hydrofracturing hydrofracking fraccing fracing A well stimulation technique during which bedrock formations are fractured through the injection of pressurized proppant-bearing liquid into a well-bore. frac'ing fracking When the hydraulic pressure is removed from the well, small grains of hydraulic fracturing proppants (either sand or aluminium oxide) hold the fractures open. fracking liquid