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| Content Provider | Springer Nature Link |
|---|---|
| Author | Guo, Weijia Zhao, Jinhai Yin, Liming Kong, Dezhi |
| Copyright Year | 2016 |
| Abstract | In terms of the problem that deep coal resources are under the threats of high water pressure, it is necessary to further study the outburst mechanism of working face floor karst water from the view of studying varying patterns of rock mechanical parameters and confined water pressure distribution of floor rock under the mining influence in the process of mining. Through the theoretical research of fluid-solid coupling and rock seepage experiment, the changing rule of the rock porosity and the Young’s modulus is analyzed, the changing law of the floor displacement is obtained by establishing the floor mechanic model, and the relation between elastic energy density and rock mass unit strain is established. Based on the numerical model of fluid-solid coupling analysis by the Comsol Multiphysics software, the changing law of floor displacement corresponds to the theoretical solution, the different variation laws of rock mass of different depths under the actions of ground pressure are acquired by simulation calculation, the distribution characteristics of pore water pressure are discussed, and the elastic energy density of the rock mass under the action of imbalance water pressure before and after mining is comparatively analyzed. Studies show that the distribution of pore water pressure is horizontally different before and after the stress peak line, and it mainly has four distribution patterns vertically. When mining above the confined water, the spatiotemporal position when and where the upper and lower boundaries of the rock mass in the lower water-resisting layer release energy at the same time is critical to the occurrence of water inrush. |
| Starting Page | 1 |
| Ending Page | 14 |
| Page Count | 14 |
| File Format | |
| ISSN | 18667511 |
| Journal | Arabian Journal of Geosciences |
| Volume Number | 10 |
| Issue Number | 1 |
| e-ISSN | 18667538 |
| Language | English |
| Publisher | Springer Berlin Heidelberg |
| Publisher Date | 2016-12-27 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Coal seam floor Energy dissipation and poroelastic models Water inrush Rock mechanical properties Numerical simulation Coal floor mechanical model Earth Sciences |
| Content Type | Text |
| Resource Type | Article |
| Subject | Earth and Planetary Sciences Environmental Science |
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