TY - JOUR PY - 2006// TI - Prevention of Rock Bursts: Evaluation of Safety Requires Expert Knowledge JO - Gluckauf: Die Fachzeitschrift fur Rohstoff, Bergbau und Energie A1 - Huwe, HW A1 - Baltz, R A1 - Hucke, A SP - 338 EP - 341 VL - 142 IS - 7-8 N2 - The experts on the Department for Prevention of Rock Bursts can now delimit potential rock burst hazards very accurately on the basis of their experience and by inclusion of suitable databases. However, the increasing rock pressure at greater depths gives rise to new hazardous situations, which necessitate accurate expert evaluation on the site. In recent years the larger mechanical equipment required larger roadway cross-sections and as a result of the increasing pressure due to the greater depth more stable compact supports. With its massive backfilling this promoted a build-up of stress in areas with a potential rock burst hazard. A rock burst with injuries to personnel in 2004 shows that the pressure due to the depth and a geological anomaly alone may lead to corresponding stress concentrations. The above-mentioned situation was promoted by massive backfilling, which prevented the seam from migrating into the open mine workings. The conventional geometrical situations such as pillar edges or seam corners are no longer alone in the forefront in recognised hazardous areas, as is also shown by this case. The increasing problem of earth vibrations also has a partial effect on the mine workings. The consequence may be a transient pressure rearrangement. As shown by a practical case, this results in new situations in areas with a rock burst hazard, which require accurate evaluation by different technical departments.

 

LA - SN - 0340-7896 UR - http://dx.doi.org/ ID - ref1 ER -