Proceedings of the 8th Russian-Chinese Symposium “Coal in the 21st Century: Mining, Processing, Safety"

Considering Behind Limit Deformation for Calculation of Coal Pillars Parameters by Finite Element Method

Authors
Inna Ermakova, Natalya Pirieva
Corresponding Author
Inna Ermakova
Available Online October 2016.
DOI
https://doi.org/10.2991/coal-16.2016.17How to use a DOI?
Keywords
coal pillars, finite element method, behind limit coal deformation, maximum bearing pressure.
Abstract
The paper presents the steps of calculating the stress-strain state of coal pillars by finite element method. The estimated area included the following blocks: the rock of roof and soil, coal pillar, broken-down rock, and the area of complete roof displacement. All the blocks were taken linearly deformable with natural deformation characteristics. The distribution of the bearing pressure on the pillar obtained on the first stage was used to determine the length of behind limit deformation zone and its deformation characteristics. On the second stage, the behind limit deformation zone was additionally calculated on the edge of the pillar. The analytical dependence of the length of the pillar's behind limit deformation zone (the distance to the maximum pressure) on the compressive strength of coal, depth and lateral thrust rate was established. This result allows us to find the minimum width of the stable pillars.
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This is an open access article distributed under the CC BY-NC license.

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Proceedings
8th Russian-Chinese Symposium “Coal in the 21st Century: Mining, Processing, Safety"
Publication Date
October 2016
ISBN
978-94-6252-233-6
DOI
https://doi.org/10.2991/coal-16.2016.17How to use a DOI?
Open Access
This is an open access article distributed under the CC BY-NC license.

Cite this article

TY  - CONF
AU  - Inna Ermakova
AU  - Natalya Pirieva
PY  - 2016/10
DA  - 2016/10
TI  - Considering Behind Limit Deformation for Calculation of Coal Pillars Parameters by Finite Element Method
BT  - 8th Russian-Chinese Symposium “Coal in the 21st Century: Mining, Processing, Safety"
PB  - Atlantis Press
UR  - https://doi.org/10.2991/coal-16.2016.17
DO  - https://doi.org/10.2991/coal-16.2016.17
ID  - Ermakova2016/10
ER  -