Authors: V.A. Gogolin, I.A. Ermakova

Title of the article: Selection of development working location nearby the mined-out space with allowance for geomechanical factors

Year: 2019, Issue: 1, Pages: 43-48

Branch of knowledge: Geomechanics, rock blasting, mining aerogasdynamics, and mountain thermal physics

Index UDK: 622.831

DOI: 10.26730/1999-4125-2019-1-43-48

Abstract: The development of new sections of coal seams often occurs near the previously developed sections and requires the drivage of new development workings. These development workings should be in the pillar at a certain distance from the mined-out space to maintain their stability. The article deals with the problem of the stress-strain state of the pillar with the development workings located in the zone of influence of the mined-out space. The numerical calculations of the vertical component of stress at different distances of the development workings from the mined-out space are carried out. The state of the development working in relation to the width of the pillar between the development working and the mined-out space, the depth of the development and the compressive strength of the coal were investigated. The calculations were carried out by the finite element method for the conditions of a flat linearly deformed state of rocks. To assess the strength of the pillar between the devel-opment working and the mined-out space, the compressive strength criterion of rocks was used, taking into account the out-of-limit deformation of coal. The relationship between the minimum width of the safety pillar and the ratio of the depth of the development to the strength of the coal in compression is established. The dependence obtained allows us to substantiate the choice of the location of the development working in the coal pillar, taking into account the known geomechanical factors. The minimum width of the safety pillar between the development work-ing and the mined-out space for the conditions of development of flat seams of Kuzbass was calculated.

Key words: development working coal pillar finite element method strength of the pillar

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