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Estimating Volume of Roof Fall in the Face of Longwall Mining by Using Numerical Methods / Estymacja Objętości Zawału Stropu W Rejonie Przodka Ścianowego W Oparciu O Metody Numeryczne
| Content Provider | Scilit |
|---|---|
| Author | Saeedi, Gholamreza Shahriar, Korosh Rezai, Bahram |
| Copyright Year | 2013 |
| Abstract | Dilution is one of many challenges confronting professionals in mining and milling, and is perhaps one of the oldest. Longwall mining is one of the mining methods that is often affected by out-of-seam dilution (OSD). In this method, roof falls play a significant role in increasing OSD in the prop-free front of the face area. Thus, estimating the volume of roof fall can be extremely helpful to assess dilution of the run of mine coal without a sampling process. This paper presents the effect of exposed area geometry on potential roof falls using the 2D numerical modelling program FLAC. In this respect, a half-prolate ellipsoid was considered as the low stress level or plasticity zone under yield tension which roof material fall. Since FLAC software does not show roof falls in prop-free front of the face, a series of two-dimensional numerical models are developed using UDEC software. The comparison of the results of two numerical models clearly indicates that volumes of roof fall obtained by means of these methods are in good agreement with each other. |
| Related Links | http://www.degruyter.com/dg/viewarticle.fullcontentlink:pdfeventlink/$002fj$002famsc.2013.58.issue-3$002famsc-2013-0053$002famsc-2013-0053.pdf?t:ac=j$002famsc.2013.58.issue-3$002famsc-2013-0053$002famsc-2013-0053.xml |
| Ending Page | 778 |
| Page Count | 12 |
| Starting Page | 767 |
| ISSN | 08607001 |
| DOI | 10.2478/amsc-2013-0053 |
| Journal | Archives of Mining Sciences |
| Issue Number | 3 |
| Volume Number | 58 |
| Language | English |
| Publisher | Walter de Gruyter GmbH |
| Publisher Date | 2013-09-01 |
| Access Restriction | Open |
| Subject Keyword | Archives of Mining Sciences Characterization and Testing of Materials Dilution Numerical Modeling Longwall Mining Tabas Coal Mine Cienianie Warstwy Modelowanie Numeryczne Wybieranie Cianowe Kopalnia Wgla Tabas Journal: Archives of Mining Sciences, Vol- 58, Issue- 1 |
| Content Type | Text |
| Resource Type | Article |
| Subject | Geochemistry and Petrology Geotechnical Engineering and Engineering Geology |
