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Published on 25 April 2020

SUBSTANTIATION PARAMETERS OF DEVELOPMENT TECHNOLOGY FOR UNDERWORKED DISSEMINATED ORES

O. Z. Gabaraev , N. G. Valiev, Y. A. Majstrov, I. A. Zasseev

The stress-strain state of the rock and massif was assessed from the consolidating stowing by the finite element method. Studies have shown that an increase in the underworking span leads to an increase in stresses in the previously filled space.  In the central part of the block, in the area where  fractured rocks  transit to solid, increased stresses are confined with s≥ (2÷2,5)γН, then the stresses decrease to an average level.  It was revealed that when using continuous chamber development systems, a rectangular prism is formed in the edge part of the stowing array, the lateral face of which is an outcrop of the stowing in the treatment mine, the stability of which is determined by the condition of non-destruction of the prism in the stowing array. A new experimental method has been developed for calculating the normative strength of the filling mass, taking into account the influence of lateral deformation restrictions and hardening of the filling mass during volumetric unequal compression, which allows increasing the measurement accuracy. It has been established that with the developed technology of excavation of worked-up ores sections, the lower part of the chamber is supported by beaten and stained ore, and the stability of the upper part is increased due to the intensive filling of the worked space and reduction of the standing time of the open chamber. The technology provides high stability of the worked out space and allows to reduce ore loss and dilution.

CityVladikavkaz, Ekaterinburg
CountryRussia
UDC622.27
Issue2020, № 1 (Т. 12)
Key wordshardening mixtures, various-strength compositions, deformations, massif hardening, and development technology.
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Categories: Articles

Tags: твердеющие смеси, разнопрочные составы, деформации, упрочнение массива, технология разработки.

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ISSN 1998-4502 (Print)                                                            ISSN 2499-975Х (Online)