Study Of Shape and Inclined Surface Pillar Effect On Strength Of Pillar

  • Rully Nurhasan Ramadani Jurusan Teknik Pertambangan, Fakultas Teknik Universitas Islam Bandung.
  • Iswandaru Iswandaru Jurusan Teknik Pertambangan, Fakultas Teknik Universitas Islam Bandung.
  • Ridho K. Wattimena Jurusan Teknik Pertambangan, Fakultas Teknik Universitas Islam Bandung.
  • Made A Rai Jurusan Teknik Pertambangan, Fakultas Teknik Universitas Islam Bandung.

Abstract

Study of stability and pillar failure mechanism with a variety of methods have been
carried with empirical and analytical approach. H. Moomivand dan V.S. Vutukuri in 2008 do
to research with physical model of coal cubic with ratio of 0,25 to 10 with surface of pillar is
horizontal, this research aims to investigated changes in the ratio of pillar on compressive
strength and pillar mine failure mechanism, to study the relationship do the physical modelling
with 5 variations of height of 5 cm – 40 cm each pillar geometry has 7 variatons inclined
surface 0o-30o. Samples of the pillar of testing with direction of the axial load on the body pillar
until failure. Other than that do to 2D numerical modelling with finite element methods with
assisted of software Phase2 (Rockscience). Physical modelling result showed the value of
the compressive strength and the strength of pillar will be increased with the increasing ratio
of pillars w/h. Effect of change in the inclined surface pillar to the compressive strength and
pillar of strength showed no behavioral changes in the compressive strength and the strength
of the pillars to change the angle of the surface of the pillar. Changes in strength factor and
sigma 1 showed decreasing of the value when the angle of the pillar is increasing even
though the changes in the value of the numerical modeling results are not significant.

Keywords: Mechanism, failure, Pillar, Finite Element, horizontal, displacement, strength

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Published
2019-06-28
How to Cite
Ramadani, R., Iswandaru, I., Wattimena, R., & Rai, M. (2019). Study Of Shape and Inclined Surface Pillar Effect On Strength Of Pillar. PROMINE, 7(1), 08-14. https://doi.org/10.33019/promine.v7i1.1055
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