| 采动覆岩破坏及离层发育特征的三维数值模拟 |
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| 引用本文： | 王金山,王忠昶.采动覆岩破坏及离层发育特征的三维数值模拟[J].煤矿开采,2011(6). |
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| 作者姓名： | 王金山 王忠昶 |
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| 作者单位： | 内蒙古科技大学高等职业技术学院;大连交通大学土木与安全工程学院; |
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| 基金项目： | 国家自然基金资助项目(51009015); 辽宁省教育厅科学技术研究基金资助项目(L2010038) |
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| 摘 要： | 为了获得煤层采动覆岩移动及离层空间分布特征,考虑覆岩的碎胀性,根据抗弯刚度的不同在相应的界面设置接触单元,以基本顶初次跨落为时间起点,以初次跨落步距为初次开挖长度,以周期来压步距为开挖步长,以来压周期为开挖周期,应用数值模拟手段,获得了水平煤层开采时的覆岩破坏、移动与变形及离层的发展与分布的时空规律,确定了可充填离层的区域范围,为指导实施离层充填减沉技术及工程实践提供了科学依据。
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| 关 键 词： | 覆岩 离层 接触单元 抗弯刚度 |
3D Numerical Simulation of Overlying Strata Broken and Separation Induced by Mining |
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| WANG Jin-shan,WANG Zhong-chang.3D Numerical Simulation of Overlying Strata Broken and Separation Induced by Mining[J].Coal Mining Technology,2011(6). |
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| Authors: | WANG Jin-shan WANG Zhong-chang |
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| Affiliation: | WANG Jin-shan1,WANG Zhong-chang2(1.High Vocation Technology School,InnerMongolian University of Science & Technology,Baotou 014010,China,2.Civil & Safety Engineering School,Dalian Jiaotong University,Dalian 116028,China) |
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| Abstract: | In order to obtain the characteristic of overlying strata movement and separation induced by mining,taking rock's bulking property into account,this paper applied numerical simulation to researching time-space rules of breakage,movement and deformation,separation development and distribution of overlying strata in mining sub-horizontal coal-seam.In simulation,first roof caving pace was input as first excavation length,periodical pressure pace as excavation step length and periodical pressure time as excavat... |
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| Keywords: | overlying strata separation contact zone transverse rigidity |
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