回风石门软岩巷道变形破坏机理及其支护对策

针对煤矿回风石门出现严重底臌、折帮和顶沉等非线性大变形破坏现象,且难支护的问题,采用工程地质力学分析、数值模拟和现场试验研究相结合的研究方法,对巷道的变形破坏机理和支护对策进行了深入研究。结果表明,巷道的变形破坏受分子吸水膨胀、胶体膨胀、构造应力、重力、工程偏应力、软弱夹层、层理等多种因素影响,其变形力学机制为IABIIABDIIIBC型。针对该种类型的复合型变形力学机制,提出了相应的转化为单一型的技术对策,数值模拟结果表明该技术对策可有效控制巷道的大变形破坏;提出了恒阻大变形锚杆＋金属网＋底角注浆锚管＋钢纤维混凝土耦合支护方案,现场应用效果良好。...

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Bibliographic Details
Published in煤炭学报 Vol. 39; no. 6; pp. 1000 - 1008
Main Author 杨晓杰 庞杰文 张保童 孟凡毅 姜文峰 樊利朋 牛翔
Format Journal Article
LanguageChinese
Published 2014
Subjects
变形力学机制
回风石门
支护
软岩巷道
Online AccessGet full text
ISSN0253-9993

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Summary:针对煤矿回风石门出现严重底臌、折帮和顶沉等非线性大变形破坏现象,且难支护的问题,采用工程地质力学分析、数值模拟和现场试验研究相结合的研究方法,对巷道的变形破坏机理和支护对策进行了深入研究。结果表明,巷道的变形破坏受分子吸水膨胀、胶体膨胀、构造应力、重力、工程偏应力、软弱夹层、层理等多种因素影响,其变形力学机制为IABIIABDIIIBC型。针对该种类型的复合型变形力学机制,提出了相应的转化为单一型的技术对策,数值模拟结果表明该技术对策可有效控制巷道的大变形破坏;提出了恒阻大变形锚杆＋金属网＋底角注浆锚管＋钢纤维混凝土耦合支护方案,现场应用效果良好。
Bibliography:YANG Xiao-jie,PANG Jie-wen,ZHANG Bao-tong,MENG Fan-yi,JIANG Wen-feng,FAN Li-peng,NIU Xiang （ 1. State Key Laboratory of Deep Geomechanics and Underground Engineering, China University of Mining and Technology（ Beijing）, Beijing 100083, China; 2. School of Mechanics ＆ Civil Engineering, China University of Mining and Technology（ Beijing） , Beijng 100083, China;3. Key Laboratory of Deep Mining and Hazard Prevention, China University of Mining and Technology（ Beijng ）, Beijing 100083, China;4. CCCC Fourth Harbor Engineering Institute Co. , Ltd. , Guangzhou 510230 ,China;5. College of Geoscience and Surveying Engineering,China University of Mining and Technology（ Beijng） ,Beijng 100083, China ）
air return laneway; soft rock roadway; deformation mechanical mechanism; support
Aiming at the problem that the air return laneway of coal mine with a series of nonlinear large deformation and failure phenomenon such as serious floor heaves,wall caving,and roof falling is difficult to support,the authors deeply studied the d
ISSN:0253-9993