| 沿空留巷顶板下沉量计算及分析 |
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| 引用本文： | 卢小雨,华心祝,赵明强.沿空留巷顶板下沉量计算及分析[J].采矿与安全工程学报,2011,28(1):34-38. |
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| 作者姓名： | 卢小雨 华心祝 赵明强 |
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| 作者单位： | 1. 安徽理工大学能源与安全学院,安徽,淮南,232001
2. 煤炭科学研究总院重庆研究院,重庆,400037 |
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| 摘 要： | 基于支架-围岩整体力学模型,利用位移变分原理研究了沿空留巷时基本顶在给定变形下直接顶的受力、变形情况,探讨了顶板下沉量与巷内、巷旁支护阻力、直接顶厚度、巷道宽度及充填体宽度之间的相互关系.结果表明:巷内支护阻力对顶板下沉量几乎没有影响;顶板下沉量随巷旁支护阻力的增大而减小;直接顶厚度在2.5 m以内时,顶板下沉量变化不大;而直接顶厚度大于2.5 m时,顶板下沉量随直接顶厚度的增加而显著减少;巷道顶板下沉量随巷道宽度的增加而加大;巷道顶板下沉量随充填体宽度的增大而增大.
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| 关 键 词： | 沿空留巷 直接顶 位移变分原理 顶板下沉量 |
Calculation and Analysis of Immediate Roof Subsidence in Gob-Side Entry Retaining |
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| LU Xiao-yu,HUA Xin-zhu,ZHAO Ming-qiang.Calculation and Analysis of Immediate Roof Subsidence in Gob-Side Entry Retaining[J].Journal of Mining and Safety Engineering,2011,28(1):34-38. |
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| Authors: | LU Xiao-yu HUA Xin-zhu ZHAO Ming-qiang |
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| Affiliation: | LU Xiao-yu1,HUA Xin-zhu1,ZHAO Ming-qiang2(1.School of Mineral and Safety,Anhui University of Science and Technology,Huainan,Anhui 232001,China,2.Chongqing Institute of Coal Science Research Institute,Chongqing 400037,China) |
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| Abstract: | Based on the global mechanical model of supports and surrounding rocks in gob-side entry retaining,we studied the stress and deformation of the immediate roof subjected to given deformation of the main roof based on the displacement variational principle.The relations among the subsidence of the immediate roof,the supporting resistance in the tunnel and beside the tunnel,the height of the immediate roof,the width of the roadway and filling body are further discussed.The results show that 1) the entry suppor... |
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| Keywords: | gob-side entry retaining immediate roof displacement variational principle roof subsidence |
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