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Title of Journal: J Cent South Univ

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Abbravation: Journal of Central South University

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Central South University

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10.1007/978-3-662-06545-7_3

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2227-5223

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Elimination of boundary effect for laminated overb

Authors: Peng Zhang K A Heasley
Publish Date: 2016/07/05
Volume: 23, Issue: 6, Pages: 1468-1473
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Abstract

The laminated overburden model LaModel has been widely used for pillar design and stability analysis As a boundary element program the LaModel program is sensitive to the boundary condition which should be considered before creating the model To eliminate the boundary effect in a LaModel pillar stability analysis a suitable boundary buffer zone is needed around the model edge The radius of influence R and the abutment load extent D are two major factors that affect the stresses and displacements calculated in LaModel To determine the optimum buffer zone extent a database of case histories was analyzed using the LaModel program Values for R and D were varied until a buffer zone having negligible influence on the pillar stability factor SF of the active mining zone AMZ was determined

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