Satbayev University, Almaty, Kazakhstan

Nurpeisova M. B., Professor, Doctor of Engineering Sciences, marzhan-nurpeisova@rambler.ru
Soltabayeva S. T., Professor, Candidate of Engineering Sciences

NPK Algorithm LLP, Karaganda, Kazakhstan

Salkynov A. T., Chief Executive Officer

Research Institute of Comprehensive Exploitation of Mineral Resources — IPKON, Moscow, Russia
Miletenko N. A., Senior Researcher, Candidate of Engineering Sciences

This article deals with the determination and analysis of patterns of geomechanical processes in hybrid open pit/underground mineral mining. The domestic and foreign practices of mineral mining gravitate increasingly more toward the hybrid open pit/underground technologies. An illustration of such operations in Kazakhstan is the Saryoba copper–gold ore deposit which needs individual engineering solutions and reliable geomechanical justification of production with regard to the standards of subsoil protection and industrial safety. Hybrid open pit/underground mining creates a complex geomechanical system featuring repeated loading of the same rock mass areas during open pit and underground mining operations implemented concurrently or sequentially. The problem of geomechanical assessment of rock mass in such conditions is complicated by many internal and external influences, and by variability of rock mass behavior in time and space. Aiming at safe and efficient mining of gold ore lodes at the test deposit, the authors analyze the influence of natural and geotechnical factors on deformation processes, which enables estimating controllability of these effects on rock mass and its surroundings. This article describes the studies accomplished by the authors in the course of the research in the framework of the Project on Integrated Monitoring of Slow Crustal Motions in Central Kazakhstan. Furthermore, the article contains the geomechanical monitoring results obtained by the authors using up-to-date survey and geodesy equipment which ensures high accuracy and efficiency of surveying. The novelty of the research consists in evolvement of a concept about deformation mechanism in bedded rock masses and fracturing of a pillar established between the open pit and underground mine, as well as in determination of displacement patterns in rocks mass subjected to the hybrid open pit/underground method of mineral mining, which enables selecting ways of control over geomechanical processes.

The study was supported by the Ministry and Science and Higher Education, Grant АР14871828 Investigation and Development of High-Efficient Procedure for Geotechnical Monitoring of Rock Masses for Assessment and Prediction of Deformation Processes during Mineral Mining.

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