DETERMINATION OF THE SURFACE COLLAPSE PROCESS PHASE CAUSED BY BLOCK CAVING MINING

Abstract

The relevance of the research. Waste rock dumping in the area of the surface collapse caused by the underground mining is one of the rational methods of dumping. It contributes to saving land resources and reducing the transport path of overburden. The paper considers the safety of waste rock dumping on the earth’s surface in the collapse zone caused by operating underground mines. The aim of the research is to develop the methods for determining and monitoring the phase of glory hole evaluation for safety of people and equipment when working in the zone of collapse. Methods: creating the caved rock zone model. Model sets the ratio between the glory hole volume and undercut volume using the swell factor. The criterion of the glory hole growth is the increase of the glory hole to the maximum volume, defined by the geometric parameters of the undercut. The swell factor of caved rock mass is determined in situ by analyzing the measured glory holes. Results. The authors have developed the classification of the glory hole evaluation stages and methods for its determining and defind the value of the swell factor of caved rock mass in the specific conditions of the Sokolovskoe ore deposit. The swell factor of the caved rock mass, defined for the first glory holes, is within 1–1,4. It was determined by proportion soil and rock in the waste rock above undercut. The swell factor of the caved rock mass, defined for the second glory holes, is about 1,0

Keywords

• glory hole
• swell factor
• caved rock zone
• block caving
• surface collapse
• deformation monitoring
• unmanned aerial vehicle
• digital elevation model