... in its Czech part. Here a case study of destress blasting is presented and evaluated in terms of rockburst prevention, focusing on a thick coal seam (about 5 m) subject to longwall mining under very unfavourable geomechanical conditions (great depth – 1200 m, competent rigid rocks between coal seams...

... thicknesses under different stoping geometries. Numerical modelling was also utilized to evaluate the crown pillar performance under various in-situ stress conditions and mining sequences. In addition, stope stability in the upper mining block was analysed using the updated Matthews' stability graph...

... Severe instability in an underground hard-rock bord and pillar mine situated on the Great Dyke in Zimbabwe necessitated a thorough revision of the existing design. Local geotechnical conditions characterized by undulating, subhorizontal and intersecting shear structures, variable in thickness...

... Gus seam of the Vryheid Formation. These seams are separated by a planar cross-laminated sandstone, here referred to as the parting, which ranges in thickness from 2 cm to 11 m. The parting forms the floor of the upper Alfred seam and the roof of the lower Gus seam. Roof failures are a major cause...