Abstract: In order to solve the difficult problem of supporting cracked roof in driving coal roadway through faults,the technology of pre-grunting Marithan with hollow anchored bolt and cable was applied to reinforcing roof and two-side.Parameters including grunting range,pre-grunting distance,diffusion diameter,borehole distribution and grunting pressure were obtained.Practice showed that Marithan effectively controlled surrounding rock deformation and prevented roadway blocking,roof falling and coal-wall sliding.Driving speed was increased under safe condition.