李怀珍, 李家豪, 袁瑞甫,等.注浆钢管墩柱承载性能与综放开采切顶留巷应用研究[J].河南理工大学学报（自然科学版）,2026,45(2):129-139.

LI H Z, LI J H, YUAN R F, et al. Research on the bearing performance of grouted steel pipe piers and their application in gob-side entry retaining under fully mechanized top-coal caving mining[J].Journal of Henan Polytechnic University(Natural Science) ,2026,45(2):129-139.

注浆钢管墩柱承载性能与综放开采切顶留巷应用研究

李怀珍, 李家豪, 袁瑞甫, 穆棒棒, 解帅帅

河南理工大学 能源科学与工程学院，河南 焦作 454003

摘要: 目的 采用不同形式充填体进行巷旁支护存在运输量大、工艺复杂、初强低和成本高等问题，因此亟需研发一种高强、高刚、轻型模块化巷旁支护结构。  方法 采用理论分析、室内试验、数值计算和工程应用等方法开展研究，选取长500 mm，ϕ159 mm的钢管墩柱，采用不同壁厚和不同水灰比注浆进行轴心加载试验和数值计算，明确影响注浆钢管墩柱承载性能的敏感因素和合理参数。对外形结构进行设计并加工长1 200 mm，ϕ159 mm的钢管墩柱，注入水灰比0.4的浆液进行轴向加载试验和数值计算。结合某综放工作面切顶留巷，通过极限平衡法和数值计算，分析现场用墩柱（长3 000 mm、外径299 mm、壁厚8 mm、水灰比0.4）的承载性能。  结果 结果表明，钢管壁厚为8 mm、水灰比为0.4时钢管墩柱具有相对理想的极限承载力。工程现场注浆钢管墩柱轴向极限承载力超过4 800 kN，与理论预测高度吻合。  结论 注浆钢管墩柱通过优化钢管壁厚与浆液配比，具备较高承载能力，简化了施工流程，降低了设备需求与材料成本。工程实践表明，采用注浆钢管墩柱进行综放开采切顶留巷巷旁支护，巷道稳定后的顶底板最大移近量为78 cm，巷帮最大移近量为95 cm，巷道收缩率满足工程要求。

关键词:沿空留巷;注浆钢管墩柱;承载性能;综放开采;工程应用

doi:10.16186/j.cnki.1673-9787.2025030007

基金项目:国家自然科学基金资助项目（52474095）；河南省科技攻关项目（252102320325）

收稿日期:2025/03/04

修回日期:2025/07/28

出版日期:2026/01/28

Research on the bearing performance of grouted steel pipe piers and their application in gob-side entry retaining under fully mechanized top-coal caving mining

Li Huaizhen, Li Jiahao, Yuan Ruifu, Mu Bangbang, Xie Shuaishuai

School of Energy Science and Engineering， Henan Polytechnic University， Jiaozuo 454003， Henan， China

Abstract: Objectives The use of filling materials for roadside support in gob-side entry retaining under fully mechanized top-coal caving mining is often associated with large material transportation volumes， complicated construction processes， low early strength， and high costs. Therefore， there is a strong need to develop a high-strength， high-stiffness， lightweight， and modular roadside support structure. Methods The bearing performance of grouted steel pipe piers was investigated through theoretical analysis， laboratory experiments， numerical simulations， and engineering application. Steel pipe specimens with a length of 500 mm and a diameter of 159 mm， fabricated with different wall thicknesses and grouted with slurries of various water–cement ratios， were subjected to axial loading tests and numerical simulations to identify the key factors influencing bearing capacity and to determine reasonable design parameters. Based on structural optimization， steel pipe piers with a length of 1 200 mm and a diameter of 159 mm were manufactured and grouted with a slurry at a water–cement ratio of 0.4， followed by axial loading tests and numerical simulations. Furthermore， taking a gob-side entry retaining project in a fully mechanized top-coal caving working face as the engineering background， the bearing performance of field-used grouted steel pipe piers （length 3 000 mm， outer diameter 299 mm， wall thickness 8 mm， water-cement ratio 0.4） was analyzed using the limit equilibrium method and numerical simulations.<italic/>  Results The results indicate that a steel pipe wall thickness of 8 mm combined with a water–cement ratio of 0.4 provides an optimal ultimate bearing capacity for the grouted steel pipe piers. The axial ultimate bearing capacity of the piers applied on site exceeded 4 800 kN， which is in excellent agreement with theoretical predictions. Conclusions By optimizing the steel pipe wall thickness and slurry mix proportion， grouted steel pipe piers exhibit high bearing capacity while simplifying the construction process and reducing equipment requirements and material costs. Engineering practice demonstrates that when grouted steel pipe piers are applied for gob-side entry retaining under fully mechanized top-coal caving mining， the maximum convergence between the roof and floor is 78 cm， and the maximum convergence of the roadway ribs is 95 cm after stabilization， meeting the engineering requirements for roadway deformation control.

Key words: gob-side entry retaining; grouted steel pipe piers; bearing performance; fully mechanized top-coal caving mining; engineering application