| 俯伪斜分段密集采煤法三维有限元数值模拟研究 |
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| 引用本文： | 唐巨鹏,潘一山,李忠华,陈德怀.俯伪斜分段密集采煤法三维有限元数值模拟研究[J].岩土力学,2003(Z2). |
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| 作者姓名： | 唐巨鹏 潘一山 李忠华 陈德怀 |
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| 作者单位： | 辽宁工程技术大学力学与工程科学系 辽宁阜新123000
(唐巨鹏，潘一山，李忠华)，京煤集团木城涧矿 北京102300(陈德怀) |
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| 摘 要： | 俯伪斜分段密集采煤法,作为一种较新的采煤方法,在我国技术上还不很成熟,因此,首次针对京煤集团木城涧矿大台井的地质条件和赋煤状况,通过简化建立三维立体有限元模型,模拟计算了该矿煤层顶底板在开采前后运动变化情况。结果表明:煤层倾角、推采距离和开采巷道数三者是影响煤层顶底板运动规律的重要因素,得到了表征顶底板运动规律的顶底板法向最大应力和法向最大位移与三影响因素关系曲线,详细阐述了三影响因素下的煤层顶底板运动规律;同时,对现场开采中支撑压力大小,特别是在三影响因素下,超前支撑压力的作用范围与应力峰值位置进行了数值计算,并总结了其影响规律;最后,指出了该数值分析方法对现场开采将具有十分重要的应用价值和指导意义。
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| 关 键 词： | 俯伪斜分段密集 三维有限元模型 数值模拟 超前支撑压力 |
Three-dimensional FEM simulation of coal mining method of oblique sublevel concentration |
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| TANG Ju-peng,PAN Yi-shan,LI Zhong-hua,CHEN De-huai.Three-dimensional FEM simulation of coal mining method of oblique sublevel concentration[J].Rock and Soil Mechanics,2003(Z2). |
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| Authors: | TANG Ju-peng PAN Yi-shan LI Zhong-hua CHEN De-huai |
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| Institution: | TANG Ju-peng1,PAN Yi-shan1,LI Zhong-hua1,CHEN De-huai2 |
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| Abstract: | The coal mining method of oblique sublevel concentration as a new technology hasnt been very perfect in China until now, so we set up three-dimensional finite element model of this kind of mining method novelly based on Datai coal mine of Beijing Coal Group as an example using Ansys software. In this paper the values of stress and displacement of coal layer roof and floor strata are calculated. The results show that coal layer obliquity, mining distance, mining laneway numbers are important influential factors of movement rule of roof and floor strata. The relationship curves between stress, displacement and coal layer obliquity, mining distance, mining laneway numbers are given out and the principle of roof and floor strata is expounded under the influence of three factors according to numerical simulation. Specially influential scope of advanced support pressure and peak value location are emphasized on the numerical simulation. Lastly the importance of numerical simulation in mining practice is pointed out. |
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| Keywords: | oblique sublevel concentration three-dimensional FEM numerical simulation advanced support pressure |
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