To the problem of selecting vertical shafts location with combined geotechnology of developing deposits

To The PRoBlem of SeleCTINg veRTICAl ShAfTS loCATIoN wITh ComBINeD geoTeChNology of DeveloPINg DePoSITSPurpose.Justification and development of scientific and methodological provisions and recommendations for determining the rational location of vertical shafts with the combined method of mining mineral deposits (the com bined geotechnology), taking into account the new manmade impact factor: the open pit space, as well as contact of weakened rocks with the open pit, the presence of groundbased open pit facilities and communications) with ap probation at the mine of the Zhairem MCC JSC (the Republic of Kazakhstan).methodology.When performing the studies on determining the location of vertical shafts in the combined geo technology conditions (transition from open pit to the underground method), the calculation method of the geome chanical model of the massif according to P. S. Shpakov classification is used that allows using the numericalanalyt ical method to estimate stability of slopes for the open pit boards of arbitrary shape.findings.The algorithms for stepbystep, sequential, local optimization of qualitative characteristics and quanti tative parameters for selecting the area of rational and safe location of vertical shafts and a model of the combined geotechnology using opening schemes of vertical shafts are proposed.The method for calculating and assessing stabil ity of open pit slopes for open pit boards of arbitrary shape for the geomechanical model of a heterogeneous massif for 4 types of computational schemes is considered.The results of scientific and experimental studies in the conditions of the Ushkatyn3 deposit (the Republic of Kazakhstan) allowed determining the zones of rock displacement around the pit and establishing safe distances for vertical shafts from the edge of the pit.originality.Studies for determining the rational and safe location of vertical shafts with the combined geotechnol ogy, taking into account new technological factors: open pit space, areas of weakened rocks contacting the open pit, landbased open pit facilities, communications, and others.The model which allows determining the vertical shafts location in the combined geotechnology is developed.There are extended methodological provisions for calculating and assessing stability of the pit slopes for the geomechanical model of the heterogeneous massif which allow estab lishing the zones of the rock displacements and collapse on the earth surface.Practical value.The proposed methodological guidelines and recommendations for selecting the rational place for laying vertical shafts, a model of the combined geotechnology when opening with vertical shafts, the ways of solving specific engineering and geomechanical tasks will improve the efficiency of using the combined geotechnology in the course of further development of fields that assume openunderground mining.

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