Physical modeling geomechanical stability of open-cast slopes and internal overburden dumps
Stability of internal overburden dumps poses one of the most essential issues with surface mining technology.It depends on the range of interdependent factors: Open-pit technological operations,physical and mechanical properties of the rock mass,climatic factors,groundwater levels,shape and geometry of the foundation,and external loads.Complex influence of these factors leads to the emergence and outspreading geomechanical deformations in the dump core with the formation of rockslides,which complicate the mining operations and result in an increase of the specific mining capital expenditures.Therefore,precise estimation and effective management of open-cast mining technology and internal overburden dumping is an important engineering issue.Physical modeling as an instrument of engineering research remains a reliable technique for resolving numerous geomechanical issues including stability of slopes and internal dumps while surface mining.It is based on the theory of similarity of an artificially prepared equivalent material to the natural geotechnical object in-situ.Basic principles of this method consider replacement of natural rocks or soils by artificial materials with specific physical and mechanical properties in accordance with the scale of modeling and correlation with the properties of in-situ objects.In spite of some inaccuracies inherent to physical models still widely used to calibrate numerical models and to better understand the processes in rocks and soils.The paper deals with the modeling stability of internal dumps at open pit Maikubenskiy (Kazakhstan)by using the method of equivalent materials.The physical model of an intemal dump with different angles of slope inclination is simulated in a specially designed flat stand and using an equivalent mix of sand and oil.According to the results obtained critical values of inclination angles for the internal dump slopes can achieve up to 50 degrees considering compaction factor.
physical modeling method of equivalent materials stability of internal dumps sliding surface
B.R.Rakishev K.Seituly O.S.Kovrov
Kazakh National Technical University named after K I.Satpayev, Kazakhstan National Mining University, Dnipropetrovsk, Ukraine
国际会议
北京
英文
583-588
2014-10-16（万方平台首次上网日期，不代表论文的发表时间）