Justifying of Variants and Constructive Parameters of System of Thin Ore Deposit Mining

Abstract

At present time mining of thin steep and sloping ore deposit is specified by significant lowering of extraction horizon -700-1100m and by rise of different protective pillar parameters, as a result, losses of mineral raw materials are increased and entire efficiency of ore deposit mining is reduced. Therefore, issues of searching and development of mining systems and scientific approaches in justifying of safe parameters of geo-technologies, allowing to minimize geotechnical hazards, providing required quality of mined materials in dependence of geological and geo-mechanical conditions, become more important.Objective of study is determining of safe parameters of geotechnologies with open mined space during mining of thin ore deposits in conditions of Irtyshsky polymetallic ore mine.Main methods of studies are technological design and mathematical (numerical) simulation of stress-strain behavior and stability of rock at constructive elements of underground geotechnologies.Room and pillar parameters are established by carried out calculations for mining systems with open mined space, providing safety of mining at deposit locations with steep and slopping ore dip.Using 3-dimensional mathematical simulation during studies of typical geological and geomechanical condition of the functioning mine significantly extends knowledge and approaches in solution of rather difficult problems. It shows high reliability and correctness of results for concrete unique mine-technical situations.