深井大型硐室厚坚硬底板破坏机理及控制技术

王树立; 张开智; 蒋金泉; 夏均民; 朱光丽

doi:10.11779/CJGE201607020

深井大型硐室厚坚硬底板破坏机理及控制技术 English Version

1. 山东科技大学矿业与安全工程学院,山东青岛 266590；
2. 贵州理工学院矿业工程学院,贵州贵阳 550003；
3. 山东科技大学矿山灾害预防控制省部共建国家重点实验室培育基地,山东泰安 271002

基金项目: 国家自然科学基金项目（51374139,51564004,51574155）；山东省自然科学基金项目（ZR2013EEM018）；山东科技大学研究生创新基金项目（YC150313）；山东科技大学校友创业创新扶持项目

详细信息

作者简介:
王树立(1988- ),男,博士研究生,主要从事深部地下空间支护、冲击地压等方面的研究工作。E-mail: skdwangshuli@163.com。

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出版历程
- 收稿日期: 2015-10-18
- 发布日期: 2016-07-24

Damage and control mechanism of thick and hard floor of large chamber in deep mines

1. College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao 266590, China;
2. Institute of Mining Engineering, Guizhou Institute of Technology, Guiyang 550003, China;
3. State Key Laboratory of Mining Disaster Prevention and Control Co-Founded by Shandong Province and Ministry of Science and Technology, Shandong University of Science and Technology, Tai'an 271002, China

摘要

摘要: 针对深井大型硐室厚坚硬底板底鼓难题,以千米深井唐口煤矿绞车房硐室为工程实例,研究底板破坏机理：深井大型硐室厚坚硬底板开挖初期表现出明显的分层屈曲损伤破坏特征,随后在高应力作用下沿损伤破坏面滑移错动鼓起;以薄板屈服理论推导了底板屈曲破坏临界载荷。以控制厚坚硬底板的屈曲损伤破坏为出发点,基于硐室底板整体加固控制原则,提出了底板组合桩基群加固治理技术：以反底拱技术为基础,借助底板横向组合钢梁及双层链接钢筋网,辅以混凝土整体浇筑组合形成底板强基础梁结构,均衡底板受力,防止局部地点高应力集中;以高预应力锚索束和高压封闭注浆技术胶结加固围岩形成底板组合桩结构,阻断围岩应力向底板传递和转移;最终形成多排锚索束张拉强基础梁的组合桩基群结构,现场应用效果良好。研究成果对于当下日益加深的深部大型硐室及大型地下空间支护具有一定的指导和借鉴意义。
- 深井大型硐室 /
- 厚坚硬底板 /
- 屈曲破坏 /
- 滑移错动 /
- 强基础梁 /
- 锚索束
Abstract: Aiming at the floor heave problem of thick and hard floor of large chamber in deep mines the winch room in Tangkou Mine about a kilometer in depth is taken as an engineering case, and the damage mechanism of thick and hard floor is studied. In early excavation, the floor sustains obvious layered damage by buckling and then slides and moves along damage fracture surface under the action of high ground stress. The critical load for damage by buckling is derived based on buckling theory of thin plate. For controlling the damage by buckling of floor, based on the principle of strength and control of the whole floor, the technology of composite piles and foundation of thick and hard floor in large chamber is proposed as follows: based on inverted arch and combined transverse steel beams and chained double reinforcing meshes, concrete is poured to form strong foundation beam so as to balance the force and prevent stress concentration of floor. The combined anchor wires and high-pressure grouting are used to form composite piles to block the floor stress to transfer from the surrounding rock and to balance the stress. Finally composite piles and foundation are formed, and the efficiency of engineering application is satisfactory. The research may be helpful to controlling large chambers in deep mines and large underground spaces.
- large chamber in deep mine /
- thick and hard floor /
- damage by buckling /
- slippage and moving /
- strong foundation beam /
- anchor wire

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