摘要
利用FLAC^(3D)内置的Fish语言编程,提取巷道围岩位移量与塑性区范围,揭示不同断面形状与埋深条件下巷道围岩变形和塑性区扩散随应力释放率的演化规律,优化了锚注支护参数(锚杆和锚索的长度、间排距、预紧力,注浆范围),提出了锚注分步联合支护技术,模拟分析不同支护参数对围岩稳定的控制效果。数值模拟结果表明,锚注分步联合支护技术,可有效控制深部高应力采动巷道围岩大变形破坏,可保证巷道围岩与支护结构的长期稳定及使用安全,具有良好的工程应用价值。
Leverage the Fish language in FLAC^(3D) to extract displacement amounts and scope of plastic zones amidst surrounding rocks,eliciting the evolution laws of deformation of the surrounding rocks and the diffusion of the plastic zone under different cross-sectional shapes and buried depths in line with stress release rate.The parameters of bolt-grouting support(length of bolt and anchor cable,spacing between rows,pre-tightening force,grouting range)are optimized,and the bolt-grouting step-by-step combined support technology is proposed to simulate and analyze the control effect of different support parameters on the stability of surrounding rock.The numerical simulation results show that the bolt-grouting step-by-step combined support technology can effectively control the large deformation and failure of the surrounding rock of the deep high-stress mining roadway,which can ensure the long-term stability and safety of the surrounding rock and supporting structure of the roadway,and has good engineering application value.
作者
亓佳利
张建
宋子鸣
赵仁宝
张假妮
孙稳
QI Jiali;ZHANG Jian;SONG Ziming;ZHAO Renbao;ZHANG Jiani;SUN Wen(Anti Impact Center,Shandong Energy Group Luxi Mining Co.,Ltd.,Yuncheng 274700,China;State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering,China University of Mining and Technology,Xuzhou 221116,China;Guotun Coal Mine,Linyi Mining Group Heze Coal and Power Co.,Ltd.,Yuncheng 274700,China)
出处
《煤炭技术》
CAS
2024年第7期91-97,共7页
Coal Technology
基金
国家自然科学基金项目(2021YFC2902103)。
