摘要
全长锚固锚索支护是矿山巷道支护中的一种重要措施,对保障巷道围岩稳定具有重要意义。本论文基于理论分析研究了锚索半径、锚固长度、锚索弹性模量、锚固界面剪切强度等参数对锚索支护承载性能的影响。研究结果表明,锚索半径、锚固长度、锚固界面剪切强度对锚索最大承载性能影响显著;随锚索半径、锚固长度、锚固界面剪切强度增加,锚索最大承载性能显著增加;锚索弹性模量对锚索支护最大承载力影响不显著,但对锚索支护系统刚度有较大影响;随着锚索弹性模量增加,锚索支护系统刚度显著增加,锚索达到最大承载力时对应的拉拔位移显著降低。该研究有助于进一步量化分析锚索支护承载性能,为进一步应用锚索支护技术提供理论依据。
Full-length anchorage cable support is an important measure in roadway support,which is of great significance to guaranteeing the stability of the roadway and surrounding rock.In this paper,we studied the influence of anchor radius,anchorage length,anchor elastic modulus,and shear strength of anchorage interface on the bearing capacity of anchor support based on the theoretical analysis.The results show that the anchor radius,anchorage length,and shear strength of the anchorage interface had significant effects on the maximum bearing capacity.With the increase of the anchor radius,anchorage length,and shear strength of the anchorage interface,the maximum bearing capacity increased significantly.The anchor elastic modulus had no significant influence on the maximum bearing capacity,but it showed a greater influence on the stiffness of anchor support system.With the increase of the elastic modulus,the stiffness of the anchor support increased significantly and the pullout displacement corresponding to the maximum bearing capacity decreased significantly.This study could facilitate further quantitative analysis of the bearing capacity of anchor support,which could provide the theoretical foundation for the further application of the anchor support technology.
作者
雷学涛
黄海鹏
刘晓明
张森
黄辉
曾班全
LEI Xuetao;HUANG Haipeng;LIU Xiaoming;ZHANG Sen;HUANG Hui;ZENG Banquan(Ningxia Coal Industry Co.Ltd.,China Energy Investment Corporation,Yinchuan 751400,China;School of Energy and Mining Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China)
出处
《山西煤炭》
2023年第2期19-23,共5页
Shanxi Coal
关键词
锚索支护
全长锚固
承载性能
本构方程
脱黏行为
anchor support
full-length anchorage technology
bearing capacity
constitutive equation
debonding behaviour
