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 language | English |
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Title of host publication | Proceedings of the 36th International Conference on Ground Control in Mining, ICGCM 2017 |
Editors | Michael Murphy, Brijes Mishra, Kyle Perry, Heather Lawson |
Pages | 353-358 |
Number of pages | 6 |
ISBN (Electronic) | 9780873354561 |
State | Published - 2017 |
Event | 36th International Conference on Ground Control in Mining, ICGCM 2017 - Morgantown, United States Duration: Jul 25 2017 → Jul 27 2017 |
Publication series
Name | Proceedings of the 36th International Conference on Ground Control in Mining, ICGCM 2017 |
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Conference
Conference | 36th International Conference on Ground Control in Mining, ICGCM 2017 |
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Country/Territory | United States |
City | Morgantown |
Period | 7/25/17 → 7/27/17 |
Bibliographical note
Publisher Copyright:© 36th International Conference on Ground Control in Mining, ICGCM 2017. All rights reserved.
ASJC Scopus subject areas
- Geochemistry and Petrology