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Instruments and Systems: Monitoring, Control, and Diagnostics

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Theoretical Foundations of diagnosis of stress-strain state of ore in pillars in underground mining of low-power fields
YU. P. GALCHENKO

Innovative development of underground mining vein deposits is based on the extensive use of high-performance mountain technologyoriented
complex mechanization of mining operations and the gradual withdrawal of the person from dangerous zones of clearing space. In these conditions, it is particularly important diagnostics of the stress-strain state of rock mass, especially within the boundaries of intercommunication and between the chamber ore pillars that ensure the stability of the rock outcrops of rocks and preservation storey workings during the development of complex vein deposits. Since the redistribution of the field voltage, thus, associated with the dynamic formation of new outcrops, the mathematical formulation of the task is determined by the equilibrium equations, ratios honey additional
stresses and strains, the ratio between the Cauchy deformation and displacement, as well as the boundary conditions determining the impact
of sewage treatment works. The solution of this problem showed that the stress concentration in the intercommunication pillar increases almost in direct proportion to its height and the angle of incidence of the veins and decreases with decreasing values of the coefficient of
lateral thrust. It was also found that the process of loss of bearing capacity pillar begins with the formation of isolated pockets of the initial destruction in its geometric center. Moreover, with decreasing angle of incidence of a core of the development of local fracture is accelerated and the rear sight quickly loses stability.
Keywords: mining steeply dipping veins and ore reserves containing an array of stresses, strains, diagnosis, methodology, sustainability
pillars.

Contacts: E-mail: schtrek33@mail.ru

Pp. 28-33.

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