| 工程因素对围岩稳定性影响三维数值模拟分析 |
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| 引用本文： | 凌标灿,彭苏萍.工程因素对围岩稳定性影响三维数值模拟分析[J].工程地质学报(英文版),2003,11(4):367-371. |
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| 作者姓名： | 凌标灿 彭苏萍 |
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| 作者单位： | 1.华北科技学院安全科学与技术研究所,燕郊065201; |
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| 基金项目： | 国家杰出青年基金 (批准号 :5 0 0 2 5 413 )，华北科技学院校内基金 (N2 0 0 2 -15 )资助 |
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| 摘 要： | 结合某地下工程实际,运用FLAC3D模拟了巷道断面形状、开挖面距离以及开挖顺序对巷道围岩稳定性的影响,并模拟了围岩深部多点位移规律。结果表明,相同围岩条件下,不同断面形状其力学效应不同,同一断面在不同围岩条件下变形不一样;围岩水平位移曲线随开挖面的距离呈S形,围岩水平最大位移主要发生在距开挖面后方 2倍巷道长径的范围内;Ⅲ级围岩深部位移影响范围约 2 .8～ 4 .3m,Ⅳ级围岩影响范围 6 .9～ 7.8m;对较大断面,分步开挖有利于围岩控制。
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| 关 键 词： | 工程因素 围岩稳定性 三维数值模拟 |
| 文章编号： | 1004-9665/2003/11(04)-0367-05 |
| 收稿时间： | 2003-04-03 |
| 修稿时间： | 2003年4月3日 |
3D NUMERICAL SIMULATION AND ANALYSIS OF THE EFFECT OF ENGINEERING FACTORS ON THE STABILITY OF SURROUNDING ROCK |
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| Institution: | 1.Facility of Safety Science and Technology NCIST, Yanjiao 065201;2.Beijing Graduation Institute CUMT, Beijing 100083 |
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| Abstract: | The effect of cross-section shape of roadway of distance of working face,sequence of excavation on the stability of surrounding rock, and displacement of many sites in deep part of surrounding rock are simulated with FLAC3D in some engineering practice . The result shows that there are different mechanical effect with different cross-section shape of roadway under the same condition of surrounding rock, different deformation of different surrounding rocks, appeared on the same cross-section and the curve of horizontal displacement of surrounding rock is s-shaped with distance from working face. A maximum horizontal displacement of surrounding rock mainly occurs in a range of double diameters of the roadway in the rear of working face. The range of displacement of deep part of Ⅲ-grade surrounding rock is about 2.6～4.3m and that of Ⅳ-grade surrounding rock is 6.9～ 7.8 m. For larger cross-section of roadway in-steps an excavation is beneficial to control on surrounding rock. |
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| Keywords: | Engineering factors Surrounding rock stability 3D numerical simulation |
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