Earlier on (1), the authors described the geology and structure framing stages of a block geomechanical model of a mine. The instruments and technologies required for the collection and processing of source data on rock mass structure were presented. The model was applied to zoning of the Novo-Shirokino Mine field with respect the rock mass stability categories for support design purposes. In order to fill the geomechanical model with the data on the mechanical properties of the jointed rock mass, the full-scale study of the rock properties were accomplished.
The studies are required for the mine zoning with respect to rockburst hazard, determination of the stability criterion and allowable parameters of stopes, and for the numerical modeling of geomechanical processes to validate an efficient mining technology. Based on the analysis of the new lab test data on the properties of rocks in NSHM, recent rockburst hazard criteria and rock fracture prediction by the rock mass quality, the rockburst hazard zoning of the NSHM field was performed by the rock mass quality index Q. The factual data analysis produced a stability criterion, and the permissible parameters of stopes were determined thereupon. The expedience of the transition from sublevel stoping to sublevel caving is shown. The conclusion is proved by the numerical modeling outcome and by the data on actual movements in rock mass.
(1) This is the end of the article. The beginning of the Article can be found in Publications under "Geomechanical model of underground mine. Part 1." Article is available in Russian only.
