The invention relates to auxiliary working apparatus (10) for use with drilling apparatus for drilling holes into the ground and where the drilling apparatus has a platform supported by a support structure (50) thereof through which a drill bit (30) passes, the platform serving as a barrier between chippings blown from a hole being drilled into the ground and the drill motor and drill bit displacement mechanism of the drilling apparatus. The auxiliary working apparatus includes a roller-type brush (20) arrangement that, in its operative configuration, is mounted beneath the platform and that is operable for displacing chippings blown from a hole being drilled into the ground to spaced locations from the hole.