Study on Formation Mechanism of Dumping Piles on Dumping Area Stability

Abstract

Dumping areas represent a stable hazard. To clarify the formation mechanism of dumping piles on dumping area stability, an investigation in open pit mine was performed. Moreover, experiments with gravel were conducted based on the research site conditions. The geological conditions, dumping operation, and waste particle size distribution were investigated in the Heidaigou open pit mine. Particle size distribution, dumping height, dumping volume, and floor inclination were varied to examine their effects on a single pile formation. The design of blasting can be modified to make the particle size of waste smaller. The volume of the bucket does not have a pronounced effect on dumping pile repose angle, capacity of dumping pile, and dumping area stability. The smaller the floor inclination, the better it is. Two measures are proposed to increase the kinetic force of friction between waste material and floor surface. The interval distance, dumping volume and dumping height were also varied to examine the interaction between the formations of multiple piles. The dumping width should be decided through optimization efficiency of bulldozer and dumping device in bucket wheel excavator-belt-stacker dumping operation and dragline dumping operation. Moreover, the volume of the bucket does not have a pronounced interaction effect. In the dumping operation, the work amount of bulldozer decreases as dumping pile increases. The design of the dumping operation must consider the total efficiency of ground leveling operation and forming dumping the area.

Innuendoes of Sterilisation Drilling in Surface Mining Operations—A Case Study

“…Waste dump lift height should necessarily be constant, though is restricted to prevent shear stresses on the foundation and is a factor to control consolidations and permeability variations [26]. The mining laws of Ghana also restricts the lift height to a maximum of 15 m. Though the total height of the dump is also restricted by formation mechanism [27] and carrying capacity limitations [28], the Ghanaian mining code limits the maximum dump height to the height of the highest topography in the vicinity. Also, the berm distance is petched at a minimum of 10 m to allow for battering before rehabliatiton such that the batter angle (θ 1 ) is less than the angle of repose (θ).…”

Methodology for a Dump Design Optimization in Large-Scale Open Pit Mines

“…Subsequent lifts' height tend to be constant but are restricted to prevent shear stresses on the foundation and is a factor to control consolidations and permeability variations [6]. The total height of the dump is also restricted by formation mechanism [7] and carrying capacity limitations [8]. As in most of the large open pit operations haulage is performed by heavy trucks, the access to the successive dump lifts is achieved by stablishing ramps of a suitable width, super elevation and gradient in order to minimize travel distance and therefore to reduce haulage costs.…”