摘要
为探究条带式煤矿开采中煤柱宽度对埋地管道安全性的影响机制,基于概率积分法和非线性有限元方法,建立“煤柱-管道-地质体”耦合作用的三维数值模型,研究煤柱宽度对围岩结构及上方埋地管道的影响规律。研究结果表明:煤柱宽度约20 m时,弹性核区可有效隔断塑性区并维持围岩稳定;合理设置煤柱宽度能分散管道集中应力,使应力曲线由“单拱型”变为“双拱型”;管道最大形变随煤柱宽度增加呈指数衰减,且不同采厚下对应特定煤柱宽度可实现围岩自稳与轴向截面应力分布优化。通过融合半经验公式与威尔逊理论,提出“煤柱安全-管道应力优化”的双控准则,明确不同工况下煤柱宽度与管道安全的定量关系。研究结果对保障能源运输基础设施安全及煤柱参数设计优化具有参考价值。
In order to clarify how coal pillar width affects the safety of buried pipelines during strip mining,this study combines the probability integration method with a nonlinear finite element method to develop a three dimensional numerical model for the coupled interaction among the coal pillar,the pipeline,and the surrounding geological medium.The model is used to quantify how coal pillar width influences the surrounding rock structure and the overlying buried pipeline.The results show that when the coal pillar width is about 20 m,the elastic core zone effectively separates the plastic zone and maintains the stability of the surrounding rock.A rational coal pillar width disperses stress concentration in the pipeline,shifting the stress profile from a single arch pattern to a double arch pattern.The maximum pipeline deformation decreases exponentially as coal pillar width increases.For different mining heights,a specific coal pillar width enables both self stability of the surrounding rock and optimization of the axial cross section stress distribution.By integrating semi empirical formulas with Wilson theory,this study proposes a dual control criterion that links coal pillar safety with pipeline stress optimization,and establishes a quantitative relationship between coal pillar width and pipeline safety under different working conditions.These findings provide a reference for safeguarding energy transport infrastructure and optimizing coal pillar design parameters.
作者
程新亮
孙东旭
任帅
李政昊
于洋
周振洋
王畅
CHENG Xinliang;SUN Dongxu;REN Shuai;LI Zhenghao;YU Yang;ZHOU Zhenyang;WANG Chang(College of Petroleum Engineering,Liaoning Petrochemical University,Fushun Liaoning 113001,China;West Inner Mongolia Natural Gas Co.,Ltd.,Ordos Inner Mongolia 017099,China)
出处
《中国安全生产科学技术》
2026年第1期64-71,共8页
Journal of Safety Science and Technology
基金
国家自然科学基金青年基金项目(52404058)
辽宁省博士科研启动基金计划项目(2025-BS-0421)。
关键词
采空区
煤柱稳定性
围岩稳定性
数值仿真
管道安全
goaf
coal pillar stability
surrounding rock stability
numerical simulation
pipeline safety
