首页|切顶自成巷约束混凝土支柱试验研究与应用

切顶自成巷约束混凝土支柱试验研究与应用

扫码查看
原文链接
  • 万方数据
  • 维普
切顶自成巷技术通过顶板定向切缝与矿压做功,使采空区顶板垮落自动形成巷道(简称自成巷).为保证切顶自成巷稳定,需要一种高强、高刚的支护结构控制顶板变形并抵抗采空区垮落岩体.轻型约束混凝土(简称CLC)结构是一种在约束材料中充填轻骨料混凝土的复合结构,具有高承载、高刚度、轻自重的特性.为明确CLC支护结构的承载性能,满足支顶护帮控制要求,开展不同截面形状、偏心距下CLC支护结构与常用型钢支护的室内和数值试验,分析各类试件的变形模式和承载性能,研究截面参数、偏心距对支柱承载性能的影响机制.结合上述试验结果,在特大型矿井柠条塔煤矿开展CLC支柱选型设计与现场应用,取得良好的自成巷围岩控制效果.
Experimental study and application of confined concrete column for automatically roof-cutting formed roadway
By deploying directional roof-cutting and the mining-induced pressure,self-caving of the roof above the goaf could form the roadway automatically,which is the so-called automatically roof-cut-ting formed roadway technology.To ensure the stability of the formed roadway,a supporting structure with high strength and high rigidity is necessary to control the roof deformation and resist the rock col-lapse from the goaf.Confined light concrete(CLC)structure is a composite structure manufactured by filling lightweight aggregate concrete into the confined material,which has characteristics such as high bearing capacity,high rigidity,and light self-weight.To understand the bearing behaviour of CLC sup-porting structure and to meet the controlling requirements of roof and rib support,this study carried out the lab and numerical tests on CLC supporting structure and normal structural steel support considering different section shapes and eccentricities.The deformation mode and bearing capacity of various speci-mens were analyzed,and the influence mechanism of cross-sectional parameters and eccentricities on the bearing capacity of supporting structures were also discussed.Based on the above testing results,CLC supporting columns were designed and applied in an extremely large coal mine:Ningtiaota Coal Mine,and favorable controlling effects of the automatically formed roadway were achieved.

automatically formed roadway by roof cuttingroof and gangue rib supportconfined light-weight concreteexperimental studyfield application

辛忠欣、江贝、王琦、王鸣子、章冲

展开 >

山东大学岩土与结构工程研究中心,山东 济南 250061

中国矿业大学(北京)隧道工程灾变防控与智能建养全国重点实验室,北京 100083

切顶自成巷 支顶护帮 轻型约束混凝土 试验研究 现场应用

国家自然科学基金国家自然科学基金国家自然科学基金山东省杰出青年科学基金中央高校基本科研业务费专项山东省高等学校青创科技支持计划

422771745207416442077267ZR2020JQ232022JCCXSB032019KJG013

2024

10.13545/j.cnki.jmse.2022.0480

采矿与安全工程学报
中国矿业大学 中国煤炭工业劳动保护科学技术学会

采矿与安全工程学报

CSTPCD北大核心
影响因子：2.054
ISSN：1673-3363
年,卷(期)：2024.41(2)
  • 34