文档介绍：论文题目:沿空留巷围岩变形特征与巷旁支护研究
专业:桥梁与隧道工程
硕士生:马金龙(签名)
指导老师:戴俊(签名)
惠兴田(签名)
摘要
巷旁支护作为沿空留巷技术中的关键部分,其参数选择的合理与否直接决定着沿空
留巷技术的成败。本文以乌兰矿 5768 运输顺槽沿空留巷工程为背景,在理论分析的基础
上,运用数值模拟方法对不同巷旁支护方式进行对比,使沿空留巷巷旁充填体的宽度及
强度合理化。
通过分析沿空留巷顶板及上覆岩体的结构特征、顶板破断及残留边界垮落的形式,
得到了沿空留巷围岩变形特征及围岩应力分布一般规律。指出了巷旁支护体在沿空留巷
过程中的作用,得出巷旁支护体强度存在合理值;根据过渡期沿空留巷顶板简化力学模
型,利用力学理论,推导出了巷旁支护阻力的计算公式,并对 5768 工作面巷旁支护阻力
进行了计算。分析了影响支护阻力的因素,提出充填体宽度存在合理值。
采用 Midas(GTS)数值模拟分析软件,通过对相同条件下、不同充填宽度和不同
充填材料对沿空留巷围岩变形特征的影响进行模拟分析,揭示了以上因素引起的围岩表
面变形、围岩应力变化规律,综合分析模拟结果及实际情况,确定了合理的巷旁充填体
基本参数。
项目实施检测结果表明:整个留巷过程中围岩应力活动较为强烈,但巷道围岩变形
较小,说明支护效果显著,保证了沿空留巷在生产期间的正常使用,验证了巷旁充填体
参数选择的正确性。
关键词:沿空留巷,巷旁支护,数值模拟
研究类型:应用研究
Subject :Research on Surrounding Rock Deformation Characteristics and
Roadside Support of Gob-side entry Retaining
Specialty :Bridge and Tunnel Engineering
Name :Ma Jinglong (Signature)
Instructor:Dai Jun (Signature)
Hui Xingtian (Signature)
Abstract
As the key part of Gob-side entry retaining, Roadside support plays an important role in
reinforcement and the selection of parameters is essential to its on Gob-side
entry engineering of Wulan mine 5768 Transport gateway, this paper analyzes different
roadside support method with the help of theoretical analysis and numerical simulation
analysis. Make the roadway filling width and strength of Gob-side retaining rationalization.
Surrounding rock deformation characteristics and the general Surrounding rock stress
distribution law are expounded through the analysis of structure characteristics of Gob-side
roof and overlying rock mass. the role of the supporting body in Gob-side retaining is pointed
out, that reasonable existence of the supporting body strength is concluded .Based on the
theory of elastic-plastic mechanics, a simplified calculation formula of Gob-side support load
is deduced and the support resistance of 5768 working face is calculated with the help of basic
mechanics model of Gob-side roof in transition per