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Information × Registration Number 0222U005289, 0120U100929 , R & D reports Title Alaboration of numerical-analitical methods for solution of mining problems popup.stage_title Head Kahadii Tetiana S., Доктор фізико-математичних наук Registration Date 27-12-2022 Organization National Technical University Dnipro Polytechnic popup.description2 Algorithms for taking into account such patterns of rock mass disturbance as joint spacing, crack inclination angle, joint conditions, and rock water saturation has been improved. Based on three-dimensional modeling the dependences of the displacement of the contour of long underground excavation and the height of the zone of inelastic deformations in its vicinity on the depth of mining, rock strength, joint spacing, joint condition index, and distance to the face at which the movements are stabilized. A method of multifactor structural identification based on the group method of data handling (GMDH) was improved, which allowed to determine the most dominant factors and build a prognostic model of the stability of the preparatory excavation conjugated with longwall. The geomechanical substantiation of excavations reuse under conditions of the jointed mass is executed. The problem of nonlinear optimization is solved by the method of generalized reduced gradient and the optimal combination of factors is established, which ensures the preservation of the maximum cross-sectional area of preparatory excavation.   Product Description popup.authors popup.nrat_date 2022-12-27 Close