Subsidence Prediction of Overburden Strata and Surface Based on the Voussoir Beam Structure Theory
The hard and stiff strata (key strata) bear the overburden load in the form of a voussoir beam structure (VBS) after break. The VBS affects both the surface subsidence and the stope underground pressure. Therefore, the reasonable method to predict the surface subsidence is based on the whole subside...
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Wiley
2018-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2018/2606108 |
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| author | Changchun He Jialin Xu |
| author_facet | Changchun He Jialin Xu |
| author_sort | Changchun He |
| collection | DOAJ |
| description | The hard and stiff strata (key strata) bear the overburden load in the form of a voussoir beam structure (VBS) after break. The VBS affects both the surface subsidence and the stope underground pressure. Therefore, the reasonable method to predict the surface subsidence is based on the whole subsidence formulae of the VBS. This study first establishes the subsidence formulae of the VBS analytically. The influence of the block length on the subsidence curve and the VBS level on the zero-subsidence range are then analyzed based on the subsidence formulae of the VBS. The results show the half-subsidence curve of the VBS is an S-shaped curve. The block length hardly affects the S-shaped subsidence curve determined by the width of the undercompacted zone. Furthermore, a greater undercompacted zone width corresponds to a greater offset distance of the inflection point. The higher the VBS level, the farther the zero-subsidence range, and the flatter the subsidence curve. The subsidence of the highest VBS can approximately represent the surface subsidence when the topsoil is thin enough. |
| format | Article |
| id | doaj-art-ef82a050fad14709b36965526c8dd6c1 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-ef82a050fad14709b36965526c8dd6c12025-02-03T05:46:06ZengWileyAdvances in Civil Engineering1687-80861687-80942018-01-01201810.1155/2018/26061082606108Subsidence Prediction of Overburden Strata and Surface Based on the Voussoir Beam Structure TheoryChangchun He0Jialin Xu1School of Mines, China University of Mining and Technology, Xuzhou, Jiangsu 221116, ChinaSchool of Mines, China University of Mining and Technology, Xuzhou, Jiangsu 221116, ChinaThe hard and stiff strata (key strata) bear the overburden load in the form of a voussoir beam structure (VBS) after break. The VBS affects both the surface subsidence and the stope underground pressure. Therefore, the reasonable method to predict the surface subsidence is based on the whole subsidence formulae of the VBS. This study first establishes the subsidence formulae of the VBS analytically. The influence of the block length on the subsidence curve and the VBS level on the zero-subsidence range are then analyzed based on the subsidence formulae of the VBS. The results show the half-subsidence curve of the VBS is an S-shaped curve. The block length hardly affects the S-shaped subsidence curve determined by the width of the undercompacted zone. Furthermore, a greater undercompacted zone width corresponds to a greater offset distance of the inflection point. The higher the VBS level, the farther the zero-subsidence range, and the flatter the subsidence curve. The subsidence of the highest VBS can approximately represent the surface subsidence when the topsoil is thin enough.http://dx.doi.org/10.1155/2018/2606108 |
| spellingShingle | Changchun He Jialin Xu Subsidence Prediction of Overburden Strata and Surface Based on the Voussoir Beam Structure Theory Advances in Civil Engineering |
| title | Subsidence Prediction of Overburden Strata and Surface Based on the Voussoir Beam Structure Theory |
| title_full | Subsidence Prediction of Overburden Strata and Surface Based on the Voussoir Beam Structure Theory |
| title_fullStr | Subsidence Prediction of Overburden Strata and Surface Based on the Voussoir Beam Structure Theory |
| title_full_unstemmed | Subsidence Prediction of Overburden Strata and Surface Based on the Voussoir Beam Structure Theory |
| title_short | Subsidence Prediction of Overburden Strata and Surface Based on the Voussoir Beam Structure Theory |
| title_sort | subsidence prediction of overburden strata and surface based on the voussoir beam structure theory |
| url | http://dx.doi.org/10.1155/2018/2606108 |
| work_keys_str_mv | AT changchunhe subsidencepredictionofoverburdenstrataandsurfacebasedonthevoussoirbeamstructuretheory AT jialinxu subsidencepredictionofoverburdenstrataandsurfacebasedonthevoussoirbeamstructuretheory |