摘要
随着煤炭资源进一步开采,浅部煤炭资源几近开采完,而深部煤炭资源的开采面临一系列问题,沿空留巷中预留煤柱随着开采动压的变化极易产生破坏,为此,基于数值模拟,对穿锚固参数对预留煤柱单元体的力学性能的影响进行研究。模拟研究表明:锚杆施加预应力后,锚固体侧向位移相应减小,有效限制了锚固体破裂初期裂缝的发展,使锚固体能够以整体结构继续承载;锚杆预留变形量能够释放前期的高地应力,有效保护锚杆承载结构。
With the further mining of coal resources,the shallow coal resources are almost finished,while the mining of deep coal resources is faced on a series of problems.With the change of mining dynamic pressure,the reserved coal pillar in gob side entry is easily damaged.Therefore,based on the numerical simulation,it is very important to study the influence of the anchorage parameters on the mechanical properties of the reserved coal pillar unit.The simulation results showed that the lateral displacement of the anchor decreased after the anchor was prestressed,which effectively limited the development of the cracks in the initial stage of the fracture of the anchor,and the anchor could continue to bear the load as a whole structure.The reserved deformation of the bolt could release the early high ground stress and effectively protect the bolt bearing architecture.
作者
吴佳俊
胡祖栋
WU Jiajun;HU Zudong(School of Resources and Environment, Henan Polytechnic University, Jiaozuo 454000, China)
出处
《邵阳学院学报（自然科学版）》
2021年第4期41-46,共6页
Journal of Shaoyang University：Natural Science Edition
关键词
锚杆
锚固参数
力学性能
数值模拟
巷道支护
bolt
anchoring elements
mechanical properties
numerical simulation
roadway support
