霍尔辛赫3501回风巷塑性区演化规律与支护研究

Study on the Evolution and Support of the Plastic Area of Huoerxinhe 3501 Return Wind Lane

针对霍尔辛赫煤矿3501回风顺槽保留巷道受二次采动影响出现的巷道围岩非均匀变形现象,通过FLAC^(3D)数值模拟和理论分析的方法研究了受多次采动影响下留巷的塑性区演化规律,并针对围岩塑性区分布特征对巷道原支护提出改进。研究结果表明:受重复采动影响下的巷道围岩塑性区呈现为非对称形态,且因留巷受3502工作面回采影响,使得巷道围岩塑性区加剧向顶底板与两帮夹角处扩展,基于此塑性区分布规律提出了巷道支护改进措施,确保了留巷服务期间的支护安全。

Aiming at the non-uniform deformation of the surrounding rock of the roadway after the secondary mining of the retained roadway of the 3501 return wind shun trough of Huoerxinhe Coal Mine,this paper studies the evolution law of the plastic area of the lane under the influence of multiple mining by the numerical simulation and theoretical analysis of FLAC^(3D),and proposes to improve the original branch of the roadway according to the distribution characteristics of the plastic area of the surrounding rock.The results show that the plastic area of the surrounding rock of the roadway under the influence of repeated mining shows an asymmetrical form,and the plastic area of the surrounding rock of the lane is aggravated and expands to the top bottom plate and the angle between the two gangs when the lane is affected by the 3502 working surface receptive,and based on the distribution law of this plastic area,the improvement of the roadway support is proposed to ensure the safety of the support during the service of the lane.