Scanning was carried out in part under the unmined pillar of the seam No. 3, which in the conditions of the thick Sedlove Member negatively impacted the gate condition of mining
works. The present tailgate was impacted by significant deformations of steel arch support, broken middle wooden
props and numerous ceiling bursts. This phenomenon can be
described as acoustic effect of the rock mass.
The great advantage of this device is that the resulting
point cloud may be processed by a variety of metrical tasks
(height and width measurements, deformation measurements, the calculation of area, volume, etc.) without requirement to repeated visit of the risky mining works.