SDPS update: Easy calculation of the edge effect offset for complex extraction panels

Joshua Hescock, Zach Agioutantis

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

The Surface Deformation Prediction System (SDPS) has been developed as an engineering tool for the prediction of subsidence deformation indices through the implementation of an influence function. SDPS provides a reliable and fast method for the prediction of mining-induced displacements, strains, tilt, and so forth at any elevation between the seam and the horizontal or varying surface topography. One of the key aspects in obtaining reliable ground deformation prediction results is the determination of the edge effect offset. The value assigned to the edge effect corresponds to a virtual offsetting of boundary lines delineating the extracted panel to allow for roof cantilevering over the mined out area. The objective of this paper is to describe the methods implemented in updating the edge effect offset code within SDPS. Using known geometric equations, the newly developed code provides a more robust calculation of the offset boundary line of the extracted panel for simplistic, as well as more complex, mining geometries. Assuming that an extracted panel is represented by a closed polyline, the new edge offset algorithm calculates a polyline offset into the extracted panel by the user-defined edge effect offset distance. Surface deformations are then calculated using this adjusted panel geometry. The MATLAB® program was used for development and testing of the new edge effect offset feature. In completing rigorous testing regimes, the new offset features will be integrated into SDPS, further increasing the speed and reliability of the programs resulting in a retrospective increase in capability and flexibility.

Original languageEnglish
Title of host publicationProceedings of the 36th International Conference on Ground Control in Mining, ICGCM 2017
EditorsMichael Murphy, Brijes Mishra, Kyle Perry, Heather Lawson
Pages353-358
Number of pages6
ISBN (Electronic)9780873354561
StatePublished - 2017
Event36th International Conference on Ground Control in Mining, ICGCM 2017 - Morgantown, United States
Duration: Jul 25 2017Jul 27 2017

Publication series

NameProceedings of the 36th International Conference on Ground Control in Mining, ICGCM 2017

Conference

Conference36th International Conference on Ground Control in Mining, ICGCM 2017
Country/TerritoryUnited States
CityMorgantown
Period7/25/177/27/17

Bibliographical note

Publisher Copyright:
© 36th International Conference on Ground Control in Mining, ICGCM 2017. All rights reserved.

ASJC Scopus subject areas

  • Geochemistry and Petrology

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