| 黄铃,王军,吴德义.巨厚砂岩顶板“三带”范围的数值模拟与界定[J].安徽建筑大学学报,2015,23(2):39-42 |
| 巨厚砂岩顶板“三带”范围的数值模拟与界定 |
| Numerical Simulation and definition of "Three Zones" in exstremely thick sandstone roof |
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| DOI：10.11921/j.issn.2095-8382.20150208 |
| 中文关键词: 采空区 三带 数值模拟 顶板 |
| 英文关键词: mined area three zones numerical simulation roof |
| 基金项目:国家自然科学基金资助项目（50374009） |
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| 中文摘要: |
| 为定量划分采空区上覆巨厚砂岩顶板的“三带”范围，根据数值模拟的应力与位移结果，提出“三带”的界定准则：将上覆岩层中主应力都为拉应力的区域定为冒落带；将只有一个主应力为拉应力的岩层高度定为裂隙带的上限。采用FLAC3D软件对开采过程中的顶板运动规律进行了数值模拟，模拟结果与实际观测结果一致。表明此界定准则可为地质条件相似矿区的顶板“三带”分布提供借鉴。 |
| 英文摘要: |
| In order to quantitatively divide the rang of “three zones” in extremely thick sandstone roof, definition criterion of “three zones” was proposed based on the distribution of stress by the numerical simulation. According to the definition criterion, the zones in which the first primary stress is tensile stress are the caving zone; the upper boundary of the fracture zone is defined in the height in which only one primary stress is tensile stress. Then, the laws of roof movement were simulated by FLAC3D software during the process of the exploitation. As the results, the simulation results are matched with the field observation. This definition criterion has a certain guiding significance for definition of the range of “three zones” in similar geological condition. |
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