Close interaction of rock fragments in underground roadway during irreversible movement of surrounding rock mass
Journal Title: Metallurgical and Mining Industry - Year 2017, Vol 9, Issue 6
Abstract
The purpose of this paper was to investigate the irreversible movement of the rock masssurrounding underground roadway. We used actual measurements of ground displacement that helped to found spatial movement of the rock mass around the roadway. Any rock mass could not move into the opening synchronously. The rock mass separates into fragments after transition to over-peak state and deforms as a discrete environment in order to accumulate the degree of freedom. The adjacent blocks move by turn, one after another in time and in space. These blocks should move forth and back in anti-phase mode accelerating or decelerating to coordinate their displacements into the cavity. Such a behavior reflects irreversible processes that are quite different from elastic behavior of vertical cross section of the roadway in plane strain state. Disintegrated rock mass is an open thermodynamic system and self-organizes its behaviordue to close interaction of adjacent rock fragments adjusting their nonreversible movements, which facilitates accumulation of degree of freedom. Such an effect has been registered in the first time and allows developing new and modification existent technologies of underground roadway maintenance that is of practical importance.
Authors and Affiliations
Ludmila Zakharova
Keywords
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- EP ID EP322781
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