| 深部大断面厚顶煤巷道围岩稳定原理及控制 |
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| 引用本文： | 肖同强,柏建彪,王襄禹,陈勇,于洋.深部大断面厚顶煤巷道围岩稳定原理及控制[J].岩土力学,2011,32(6):1874-1880. |
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| 作者姓名： | 肖同强 柏建彪 王襄禹 陈勇 于洋 |
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| 作者单位： | 中国矿业大学(徐州)煤炭资源与安全开采国家重点实验室,江苏徐州,221008;中国矿业大学(徐州)矿业工程学院,江苏徐州,221008 |
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| 基金项目： | 国家自然科学基金项目，煤炭资源与安全开采国家重点实验室自主研究课题资助，国家重点基础研究发展计划，全国博士学位论文作者专项资金资助项目，教育部新世纪优秀人才支持计划，中国矿业大学青年科研基金资助项目，中央高校基本科研业务费专项资金资助 |
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| 摘 要： | 针对深部高地应力、大断面、厚顶煤巷道围岩控制难题,采用理论分析、数值计算等方法研究了其变形破坏机制及其控制技术。研究结果表明,深部大断面厚顶煤巷道顶煤塑性区呈"拱形"或上宽下窄的"倒梯形"形态,直接顶塑性区则呈"矩形"形态,且存在肩角稳定区域。提出了"倒梯形"塑性区形成的层理面剪切破坏作用机制:在深部高应力(尤其是高水平应力)以及顶煤较大下沉产生的附加水平应力作用下,顶煤和直接顶之间的层理面发生剪切破坏,并引起其附近煤体破坏,促进了顶煤"倒梯形"塑性区的形成。基于此,提出了高强高预紧力锚杆和斜拉锚索梁联合支护围岩控制技术,认为斜拉锚索可锚固在肩角稳定区域,并起到限制顶煤与直接顶岩层之间层理面的剪切变形、阻止顶煤塑性区由"拱形"向"倒梯形"发展的作用。研究成果成功应用于工程实践。
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| 关 键 词： | 深部巷道 厚顶煤 大断面 破坏机制 层理面 斜拉锚索梁 |
| 收稿时间： | 2010-10-08 |
Stability principle and control of surrounding rock in deep coal roadway with large section and thick top-coal |
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| XIAO Tong-qiang,BAI Jian-biao,WANG Xiang-yu,CHEN Yong,YU Yang.Stability principle and control of surrounding rock in deep coal roadway with large section and thick top-coal[J].Rock and Soil Mechanics,2011,32(6):1874-1880. |
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| Authors: | XIAO Tong-qiang BAI Jian-biao WANG Xiang-yu CHEN Yong YU Yang |
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| Institution: | 1. State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou, Jiangsu 221008, China; 2. School of Mines Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221008, China |
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| Abstract: | Based on the difficult problem of surrounding rock control in deep coal roadway with large section and thick top-coal,surrounding rock deformation and failure mechanism and its supporting technology are studied.The results show that,for deep coal roadway with large section and thick top-coal,plastic zone of top-coal presents arched or inverted trapezoid with wide upper and narrow lower,however plastic zone of immediate roof presents rectangular;the shoulder stable region exists in the immediate roof.Bedding... |
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| Keywords: | deep coal roadway thick top-coal large section failure mechanism bedding surface diagonal cable and beam structure |
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